FiberWorld Transmission Product Digital Video Codec...

NT2H7916 323-1401-381

*A0666697*

FiberWorld Transmission Product

Digital Video CodecDV-45

DV-MPEG Cards Reference Manual

Standard FWP02 3.01 March 1998NTP Update DV-MPEG FWP02 3.01 Issue 1 December 1998

DV-MPEG Cards Reference Manual 323-1401-381 FWP02 3.01 Standard March 1998


Digital Video CodecDV-45

DV-MPEG Cards Reference Manual

1998 Northern TelecomAll rights reserved

Printed in Canada

All information contained in this document is subject to change without notice. Northern Telecom reserves the right to make changes to equipment design or program components, as progress in engineering, manufacturing methods, or other circumstances may warrant.

DV-45, the Nortel logo, and S/DMS TransportNode are trademarks of Northern Telecom.

Publication number: 323-1401-381Product release: FWP02 3.01 Publication status: Standard PEC: NT2H7916 Date: March 1998

iv

Digital Video Codec DV-45 323-1401-381 FWP02 3.01 Standard March 1998

v

Publication historyDecember 1998

Minor update to DV-MPEG encoder and decoder alarms.

March 1998First customer release.


vi

Publication history


vii

ContentsAbout this document xi

Introducing the DV-45 system 1-1

DV-MPEG circuit pack descriptions 2-1Overview 2-1

DV-MPEG decoder features 2-5DV-323 Mux/IMux features 2-6Signal flow 2-7Typical configurations 2-9

DV-MPEG encoder functional description 2-10Encoder motherboard 2-11Video encoder daughterboard 2-14Multiplexer daughterboard 2-16Audio encoder daughterboard 2-16

DV-MPEG decoder functional description 2-17Decoder motherboard 2-19Decoder daughterboard 2-21

DV-323 Mux/IMux functional description 2-23Mux function 2-23IMux function 2-24

TBOS alarm indications 3-1DV-45 alarm system overview 3-1Faceplate alarm indicators 3-2Alarm port indicators 3-6

Parallel alarm port 3-7TL1 alarm port 3-7Serial alarm port 3-7

Interpreting alarms and status indicators 3-14Clearing video signal trouble 3-14Clearing audio signal trouble 3-15Clearing DS3 trouble 3-15

TL-1 alarms and provisioning 4-1TL-1 interface description 4-1TL-1 parameters 4-3

AID 4-3AIDTYPE 4-4


viii

Contents

ALMCDE 4-4ATAG 4-4CONDEFF 4-4CONDESCR 4-4CONDTYPE 4-5CTAG 4-5DATE 4-6DIRN 4-6NTFCNCDE 4-6SCCM 4-7SID 4-7TID 4-7TIME 4-8TYPEREP 4-8

TL-1 commands 4-8DLT-rr (Delete attributes) 4-9ED-rr (Edit attributes) 4-10ENT-rr (Enter attributes) 4-15REPT-ALM (Report alarm) 4-17REPT-EVT (Report event) 4-18RTRV-rr (Retrieve attributes) 4-19RTRV-ALM (Retrieve alarm) 4-22RTRV-COND (Retrieve condition) 4-23RTRV-EQPT (Retrieve equipment) 4-25RTRV-HDR (Retrieve header) 4-26INIT-rr (Reset entity) 4-26

DV-MPEG circuit pack specific information 4-27MCU 4-27DV-MPEG encoder 4-28DV-MPEG decoder 4-30DV-323 Mux 4-32DV-323 IMux 4-33

DV-MPEG applications 5-1DV-MPEG encoder and decoder applications 5-1DV-323 Mux/IMux applications 5-7

Standalone concentration configuration 5-9Central office configuration 5-10

Ordering information 6-1Provisioning DV-MPEG units 6-1Cabling guidelines 6-2

Technical specifications 7-1DV-MPEG encoders 7-1DV-MPEG decoders 7-4DV-323 Mux/IMux unit 7-6Regulatory, Safety, Environmental, and Mechanical 7-8Access and trunk ports 7-9Video performance specifications 7-10Audio performance specifications 7-12


Contents

ix

Digital audio synchronization 7-12D1 interface specifications (Model 200 only) 7-13

Observing safety guidelines 8-1DV-45 shelf 8-1DV-45 circuit packs 8-1

Handling circuit packs 8-2Storing circuit packs 8-2Installing or replacing circuit packs 8-2

Radio-frequency emissions 8-3

Setting up and installing DV-MPEG circuit packs 9-1Setting DV-MPEG encoder options 9-3Setting DV-MPEG decoder options 9-10Setting DV-323 Mux/IMux options 9-14Installing DV-MPEG circuit packs in a DV-45 shelf 9-18Upgrading DV-45 MCU firmware 9-21Connecting DV-MPEG encoders to DS3 carrier facilities 9-24Connecting DV-MPEG decoders to DS3 carrier facilities 9-26Connecting a DV-323 Mux/IMux to DS3 carrier facilities 9-28Installing a fan shelf cooling unit 9-30

Testing DV-MPEG circuit packs 10-1Video tests 10-2Video test results 10-10

Bar amplitude 10-10Chrominance-luminance delay inequality 10-10Normalizing test results 10-10

Audio tests 10-11Test results 10-11

List of procedures 10-1 Measure shelf power 10-13 10-2 Verifying video signal continuity 10-15 10-3 Testing analog audio continuity (insertion gain) 10-16 10-4 Verifying audio frequency response 10-17 10-5 Testing minor and major alarm relay closures 10-18 10-6 Testing E2A (TBOS) alarm interface 10-19 10-7 Testing TL1 alarm interface 10-20


x

Contents


xi

About this documentThis document provides descriptive, alarm, application, ordering, technical specification, safety, installation and testing information for the DV-MPEG product line.

AudienceThis document is intended for DV-MPEG equipment planners, provisioners, network administrators, installers, and maintenance personnel.

OrganizationThis document contains ten chapters.

Chapter title See...

Introducing the DV-45 system 1-1

DV-MPEG circuit pack descriptions 2-1

TBOS alarm indications 3-1

TL-1 alarms and provisioning 4-1

DV-MPEG applications 5-1

Ordering information 6-1

Technical specifications 7-1

Observing safety guidelines 8-1

Setting up and installing DV-MPEG circuit packs 9-1

Testing DV-MPEG circuit packs 10-1


xii

About this document


1-1

Introducing the DV-45 system 1-This chapter introduces the DV-45 Digital Video Codec system and describes how DV-MPEG circuit packs are used within the system.

DV-MPEG codecs work on the DV-45 platform and share many of the existing DV-45 management and transport features. DV-MPEG codecs convert NTSC/PAL composite or D1 video signals into the MPEG-2 protocol, an international compression standard for organizing audio, video, and data streams. These streams can be transferred over a low voltage differential signaling (LVDS) connection or multiplexed into a DS3 signal that is ready for transmission over a synchronous optical network (SONET) or an asynchronous transfer mode (ATM) network.

Using the MPEG-2 standard, DV-MPEG codecs combine network bandwidth efficiency with high-quality video transmission for network cost savings. DV-MPEG codecs offer a means of transmitting high-quality video signals using much less bandwidth than the DV-45 codecs.

The MPEG-2 standard addresses two-way and broadcasts one-way video applications such as:

• long-haul video trunking

• distance learning

• video-on-demand (VOD)

• near video-on-demand (NVOD)

• high definition television (HDTV)

• high-quality supertrunking

• interactive conferencing

• remote arraignment

• telemedicine

See Table 1-1 for a summary of the Digital Video Codec DV-45 product line.

For additional information on the DV-45 Digital Video Codec product line, refer to the DV-45 Reference Manual, PEC NT2H7902.


1-2

Introducing the DV-45 system

For additional information on the DV-45 OC3 line interface unit, refer to the DV-OC3 Unit Reference Manual, PEC NT2H7908.

For additional information on the Nortel Supertrunk product, refer to the Nortel Supertrunk System Documentation, PEC NT2H7910.

Table 1-1 Summary of the Digital Video Codec DV-45 product line

Product Description

FTIP cabinet Fiber terminal inside plant (FTIP) cabinets are used to house rack-mountable DV-45 shelves. Each FTIP cabinet has one 2.13 m (7-ft) by 584.20 mm (23-inch) wide equipment frame with a total of 44 mounting spaces (one mounting space equals 44.45 mm [1.75-in.]). The cabinet is designed to operate in 0oC to 40oC (32oF to 104oF) ambient temperatures.

DV-45 shelf A light-weight steel card cage with a multilayer backplane. Modular plug-in units slide along card guides into connectors mounted in the backplane. The connectors change assignment according to the circuit packs installed. The shelf has 11 plug-in positions which are keyed to prevent circuit packs from being inserted in the wrong position. Positions 1 to 8 of the shelf are universal, and can contain coder, decoder, multiplexer, interface, or DCS circuit packs. Adjustable mounting brackets allow installation into either a 482.6 mm (19-in.) or 584.2 mm (23-in.) mounting bay without additional hardware. All connections are made to the rear of the shelf. Redundant -48 V battery feeds and returns are provided, with fusing (7.5 A maximum) located at the rear. See Figure 1-1.

DV-45B or DV-45BQ encoder

A plug-in circuit pack that converts an analog NTSC video signal and up to four audio inputs to a DS3 digital output. A DV-45B Coder occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for video input and DS3 output signals and screw connections for audio input signals.

DV-45B or DV-45BQ decoder

A plug-in circuit pack that converts a DS3 digital input into a video signal and up to four audio signals. A DV-45B Decoder occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for video output and DS3 input signals and screw connections for audio output signals.

DV-45 DCS unit

A DV-45 data communication synchronization (DCS) unit is a plug-in circuit pack that inserts or extracts low-speed data into or from the DS3 signal with the video and audio signals. A DCS unit occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for DS3 signals and screw connections for data signals.

—continued—



1-3

DV-45 MCU A DV-45 maintenance control unit (MCU) is a plug-in circuit pack that communicates with the other circuit packs in a DV-45 shelf and gathers alarms and status data and interprets them as major or minor. A MCU plugs into DV-45 shelf position 10. All connections are made at the rear of the DV-45 shelf—wire-wrap connections for major and minor alarms parallel interface; an E2A1 TBOS alarm serial interface (RS-422); an E2A2 computer control data serial interface (RS-422); and a TL1 alarm surveillance interface (RS-232).

DV-45 OC3 line interface unit

A plug-in circuit pack that multiplexes and demultiplexes three DS3 signals to one OC3 fiber signal. An OC3 line interface unit occupies two DV-45 shelf positions. DS3 signals are connected by BNC connectors located at the rear of the DV-45 shelf and OC3 fiber optic FC, ST, or SC connections are made at the front of the unit.

DV-45B BTSC encoder

A plug-in circuit pack for Nortel Supertrunk systems that converts an analog NTSC video signal and a standard BTSC stereo audio channel to a DS3 digital output. A DV-45B BTSC encoder occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for video input and DS3 output signals and screw connections for audio input signals.The BTSC signal formats supported are:

— 4.5 MHz FM modulated signal with 75 Ω unbalanced impedance

— baseband BTSC signal with 75 Ω unbalanced impedance


DV-45B BTSC decoder

A plug-in circuit pack for Nortel Supertrunk systems that converts a DS3 digital input into an analog NTSC video signal and a standard BTSC stereo audio channel. A DV-45B BTSC decoder occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf—BNC connectors for video output and DS3 input signals and screw connections for audio output signals.The BTSC signal formats supported are:

— 4.5 MHz FM modulated signal with 75 Ω unbalanced impedance



Music-E45 multiplexer

A plug-in circuit pack for Nortel Supertrunk systems that multiplexes up to seven digital music signals into a DS3 digital output. A Music-E45 multiplexer occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf using BNC connectors for DS3 signals and Music-E45 multiplexer cable assemblies for data and clock signals.

—continued—

Table 1-1 (continued)Summary of the Digital Video Codec DV-45 product line

Product Description


1-4


Music-E45 demultiplexer

A plug-in circuit pack for Nortel Supertrunk systems that demultiplexes a DS3 digital output from the Music-E45 multiplexer into a maximum of seven digital music signals. A Music-E45 demultiplexer occupies two DV-45 shelf positions. All connections are made at the rear of the DV-45 shelf using BNC connectors for DS3 signals and Music-E45 demultiplexer cable assemblies for paired data and clock signals.

Games-S45 multiplexer

A plug-in circuit pack for Nortel Supertrunk systems that multiplexes up to two video game signals into a DS3 digital output. A Music-E45 multiplexer occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf using BNC connectors for DS3 signals and Games-S45 multiplexer cable assemblies for data and clock signals.

Games-S45

demultiplexer

A plug-in circuit pack for Nortel Supertrunk systems that demultiplexes a DS3 digital output from the Games-S45 multiplexer into a maximum of two video games signals. A Games-S45 demultiplexer occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf using BNC connectors for DS3 signals and Games-S45 demultiplexer cable assemblies for paired data and clock signals.

Stereo-FM45 multiplexer

A plug-in circuit pack for Nortel Supertrunk systems that multiplexes up to six FM stereo signals into a DS3 digital output. A Stereo-FM45 multiplexer occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf using BNC connectors for DS3 signals and shielded audio cable for FM stereo signals.

Stereo-FM45 demultiplexer

A plug-in circuit pack for Nortel Supertrunk systems that demultiplexes a DS3 digital output from the Stereo-FM45 multiplexer into a maximum of six FM stereo signals. A Stereo-FM45 demultiplexer occupies a single DV-45 shelf position. All connections are made at the rear of the DV-45 shelf using BNC connectors for DS3 signals and shielded audio cable for FM stereo signals.

—continued—


Product Description



1-5

DV-MPEG encoder

A plug-in circuit pack that accepts a NTSC/PAL video signal (or D1 for Model 200) along with associated audio inputs and produces a coded bitstream in Transport Stream (TS) format using the MPEG-2 algorithm (ISO/IEC IS-13818). The single program TS bitstream can be transported by a low voltage differential signaling (LVDS) serial data signal or placed within a N x DS2 signal bandwidth and transported by a DS3 signal.

Two versions of DV-MPEG encoders are available:

Model 100 I-frame (intra-frame-based) coders. Coders that perform video processing and encoding based only on information in the current frame. Typically, such coders provide the lowest latencies from the analog or digital video input to the bitstream output on the transport signal. Signal bit-rates used are 6.3 (1 x DS2) Mb/s, 12.6 (2 x DS2) Mb/s, and 18.9 (3 x DS2) Mb/s.

Model 200 IBP-frame coders. Coders that perform video processing and encoding based on current, past, and future frames, as well as using motion estimation and compensation. Because future frames can only be processed by using appropriate delays of the order of one to three frames, such encoders have longer latencies built-in. However, they also make better use of the bandwidth and produce better picture quality at lower bit-rates. Signal bit-rates used are 6.3 (1 x DS2) Mb/s, 12.6 (2 x DS2) Mb/s, and 18.9 (3 x DS2) Mb/s. This encoder works in one of three modes selected by the user: I-, IP-, or IBP-mode coding.

DV-MPEG decoder

A plug-in circuit pack that demultiplexes an MPEG-2 single program TS into audio and video signals which can be sent to standard audio-video equipment.

Two versions of the DV-MPEG decoder are available, the Model 100 and the Model 200. These decoders will handle bitstreams coded in I-, IP- or IBP-mode at all bit-rates. They also incorporate provisions for lowest latency when I-frame coding is used.

—continued—


Product Description


1-6


DV-323 Mux/IMux

A plug-in circuit pack which complements the DV-MPEG codecs by providing multiplexer (Mux) and inverse multiplexer (IMux) functions for multiplexing or demultiplexing a number of MPEG-2 video signals into a single DS3 channel. The Mux function concentrates a number of MPEG-2 streams into an outgoing DS3 signal. The IMux function provides the reverse operation. The Mux and IMux functions are selectable through a DIP switch, or by DV-45 MCU software override control.

In Mux mode, the circuit pack accepts three DS3 streams from three separate asynchronous sources. Each stream will be a NxDS2 signal located in the DS3 signal as a contiguous group of DS2 slots. From each DS3 signal, one group of DS2 signals will be extracted and placed into designated DS2 slots of an outgoing DS3 signal. The designation of the slots is done by setting DIP-switches or by DV-45 MCU software control.

In inverse Mux (IMux) mode, the circuit pack accepts a DS3 signal and extracts a series of data streams at NxDS2 rates. Each stream, once extracted from the DS3 will be placed onto an outgoing DS3 signal in an appropriate number of DS2 slots. The slot extraction designations are chosen by setting dip-switches or by DV-45 MCU software control.

—end—


Product Description



1-7

Figure 1-1DV-45 shelf—front and rear views

FW-1487

Position # 7 6 5 4 3 2 1 0

Rear view

Position # 0 1 2 3 4 5 6 7 8 9 10

Front view

CodecNo. 1

CodecNo. 2

CodecNo. 3

CodecNo. 4

DS1units unused

MCU

Coder Decoder Coder Decoder Coder Decoder Coder Decoder MCU

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 4 CODEC 3 CODEC 2 CODEC 1

VIDEO & DS3 INPUT / OUTPUT FIELD

PORT 1

PORT 2

RS-232

BAT A

BAT B

DS1 FIELD FUSESRET BAT BAT RET

B A

POWER

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 2 CODEC 1

AUDIO INPUT / OUTPUT FIELD

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

DECODER/CODER CODER/DECODER DECODER/CODER

CODEC 4 CODEC 3

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

ALARMS

AUXILIARY

IN OUT


1-8



2-1

DV-MPEG circuit pack descriptions 2-This chapter describes the purpose, features, functions, and interface connections of the following DV-MPEG circuit packs:

• Encoders (Model 100 and Model 200)

• Decoders (Model 100 and Model 200)

• 323 Mux/IMux

OverviewMPEG-2 (Moving Picture Experts Group, work item 2) IS 13818 from the ISO/IEC/SC29/WG11 group is a standard defined under ISO/IEC to address compression of audio-visual signals with accompanying data at bit-rates in the range of 3-15 Mb/s or more.

MPEG-2 is rapidly becoming the dominant approach to audio/video compression in broadcast video, entertainment and interactive games. In general, the two driving concerns for MPEG-encoding solutions are speed (more efficient use of bandwidth) and image quality. In addition, MPEG-2 provides a system developed with ATM (asynchronous transfer mode) networking in mind. It does not preclude the use of other transport means such as DS3 on which this codec is based. The quality of the MPEG encoder, not the MPEG decoder, determines the perceived quality of the video.

There are two areas of compliance/conformance to MPEG-2:

• compliant bitstreams (encoder output)

• compliant decoders

MPEG-2 specifies three types of streams:

• Packetized Elementary Stream (PES), basic streams for video, audio, and data

• Program Stream (PS), combines one or more PESs which have a common time base, used in error free environment only

• Transport Stream (TS), contains PESs used where the transmission channel is prone to errors


2-2

DV-MPEG circuit pack descriptions

The DV-MPEG encoder and decoder circuit packs provide MPEG-2 audio and video compression for the Nortel Digital Video Codec DV-45 system. These circuit packs fit directly into a DV-45 shelf and interface directly with the DV-45 OA&M (operation, alarm, and maintenenance) environment. Based on the ISO/IECIS-13818 MPEG-2 standard, they are part of Nortel’s DV-MPEG family of codecs and are suitable for use in all MPEG-2 applications using synchronous and asynchronous transmission channels.

The digital encoding and transport capabilities of Nortel’s DV-MPEG codecs support premium interactive video, digital videotrunking, and supertrunking. The DV-MPEG Model 100 Encoder provides premium-quality video transmission for applications like distance learning, telemedicine, and video conferencing. For high-quality video with efficient use of bandwidth, Nortel provides the DV-MPEG Model 200 Encoder. Both products use the latest video technology for MPEG-2 using encoding chipsets from IBM.

The DV-MPEG codecs work on Nortel’s DV-45 platform and share many of the existing DV-45 management and transport features. The DV-MPEG encoders permit multiplexing and transport of up to seven video and associated audio signals on one DS3 channel, without requiring a separate multiplexer. All parameters such as bit-rate, video mode, DS2 slot assignment, are set through the DV-45 MCU (maintenance control unit) circuit pack or through dip-switches.

The DV-323 multiplexer (Mux) and demultiplexer (IMux) circuit pack is a single two-slot circuit pack that also fits directly into a DV-45 shelf and complements the DV-MPEG encoder and decoder circuit packs. The Mux function is designed to accept a number of DS3 signals, each DS3 carrying a data stream across a number of DS2 slots, for the purpose of concentrating them onto an outgoing DS3 signal. The IMux function is the inverse of the Mux function; that is, to extract a series of streams from an incoming DS3 and put each one onto an outgoing DS3. A DV-323 Mux/IMux allows you to maximize the use of broadband transmission resources by multiplexing a number of MPEG-2 video signals onto a single DS3 channel.



2-3

DV-MPEG encoder featuresThe DV-MPEG Model 100 Encoder (NT2H10AA) is a low cost I-Frame MPEG-2 encoder that takes video and audio inputs and creates a Single Program MPEG-2 Transport Stream (SPTS). The encoder accepts video and audio inputs and can output the encoded data stream inserted into a DS3 stream or over an RS-422 compatible LVDS (Low Voltage Differential Signaling) interface.

Video input is accepted as analog NTSC or PAL format. Audio programs in analog format have left and right inputs. These are balanced pair 600 ohm inputs with amplitude selection between 8 dBm peak and 18 dBm peak.

The video encoding rate can vary between 3 Mb/s and 15 Mb/s. The external clocks required to support these rates are between 3.342 MHz (min.) and 15.942 MHz (max.). This assumes 5% for transport stream overhead and the addition of the audio rate (192k). The LVDS interface can support up to a 3 DS2 rate. Anything over 16 MHz is wasted bandwidth.

A DV-MPEG encoder outputs the MPEG-2 SPTS data stream over two interfaces. The primary interface incorporates the data into a DS3 stream generated on the encoder. The encoder may generate a new DS3 stream when it is in Terminal mode, or it may be used in Repeater mode. In both cases, it inserts the MPEG data into DS2 sub-channels of the DS3 stream. As an alternate output, the serial MPEG data can be sent out over a RS-422 compatible LVDS interface. In this mode, the clock used for generating the data stream can be generated locally by the encoder or generated externally and fed into the encoder. When the clock is generated locally it can either be 6.28 MHz or 12.56 MHz. If an external clock is fed into the encoder, it can be between the range of 3.342 MHz to 15.942 MHz.

Some of the DV-MPEG Model 100 Encoder features are:

• low-latency coding using I-frame mode; latency is determined by the selected video or audio mode:

— Video 51 msec

— Audio 48 msec at 48 kHz sampling rate and 74 msec at 44.1 kHz sampling rate

• switchable full- and half-horizontal resolution of a standard D1 image size:

— full resolution—720 pixels/line x 480 line/frame

— half resolution—360 pixels/line x 480 line/frame (luminance resolution)

• single circuit pack equipped with daughterboards that fit into a single DV-45 shelf slot

• selectable analog inputs for analog video NTSC RS-170A compliant or PAL compliant signals


2-4


• inputs for stereo, mono, dual mono analog audio

• inputs the data stream into a partially filled DS3 input (44.736 Mb/s)

• inserts MPEG-2 Transport streams at N x DS2 rate into a DS3 stream (less stuff bits)

• outputs regenerated DS3 signal with inserted MPEG data; an RS-422 compatible (LVDS) interface with either internal or external generated clock is also provided

• the number of DS2s used is user selectable and can be one, two, or three

• audio encoding values are fixed at MPEG-1 Layer 2, 48 kHz or 44.1 kHz sampling and an MPEG-2 output bit rate of 192 kb/s (for 2 audio channels) for all settings

The DV-MPEG Model 200 Encoder (NT2H10AB) is an IBP Frame MPEG-2 encoder that performs video processing and encoding based on current, past, and future frames, as well as using motion estimation and compensation. Because future frames can only be processed by using appropriate delays of the order of one to three frames, such encoders have longer latencies built-in. However they also make better use of the bandwidth and produce better picture quality at lower bit-rates than I-frame encoders. The input interface is the same as for the Model 100 Encoder with the exception of the following features added to the Model 200 Encoder:

• selectable digital inputs for digital video, Serial 4:2:0 CCIR 601/656 Compliant, at 270Mb/s, converted to an 8-bit sample mode

• inputs for AES/EBU digital stereo/audio— audio level selectable at either 8 dBm or 18 dBm

• 4:2:0 chroma encoding mode

The output interface is the same as for the Model 100 Encoder.



2-5

DV-MPEG decoder featuresThe DV-MPEG Model 100 Decoder (NT2H11AA) reconstructs audio and video signals from the DV-MPEG encoder which can be sent to standard audio-video equipment. This Model 100 Decoder can handle I-frame and IPB-frame bitstreams at all bit-rates.

Some of the DV-MPEG decoder features are:

• single circuit pack equipped with daughterboard which fits into a single slot of the DV-45 shelf

• receives partially filled DS3 input (44.736 Mb/s)

• extracts MPEG Transport streams at N x DS2 rate from DS3 stream

• decoding is done in 4:2:0 chroma mode

• outputs DS3 signal unmodified

• RS-422 level serial input timed to serial clock input interface, provided as an alternate to the DS3 input

• two audio outputs at 8 dBm or 18 dBm output level

• selectable bit-rate, capacity per channel is 6.28 x N Mb/s where N = 1, 2 or 3, by selecting the value N for the number of DS2 slots, or setting the RS-422 in slave mode to an incoming clock

• selectable DS2 slot assignment for input stream

• outputs analog video NTSC which is RS 170A compliant

The DV-MPEG Model 200 Decoder (NT2H11BA) has the same features as the Model 100 Decoder with the exception of the following additional features:

• output provides video output for analog NTSC/PAL, or digital serial 4:2:0

• selectable output video port (NTSC/PAL/4:2:0)

• reinserts closed caption information into the VBI


2-6


DV-323 Mux/IMux featuresSome of the DV-323 Mux/IMux features are:

• single circuit pack to perform the MUX and IMUX functions that fits in a DV45 shelf in a single double-width slot.

• DS3 output streams created by selecting DS2 payloads from the DS3 input signals using dip-switches with software control override using TL1 messages

• Mux features include:

— can receive up to three DS3 streams generated from the DV-MPEG encoders, or, one DS3 stream on DS3 #1 from other services (e.g. GAMES, MUSIC, FM, DV45 or DCS) and two DS3s from the DV-MPEG coders

— designed to multiplex, from up to three DS3 signals, MPEG-2 streams placed in N x DS2 contiguous slots, to generate one output DS3 signal containing the selected streams

— each DS3 input can contain up to seven DS2 streams of information, with some adjacent DS2 streams being concatenated to offer services at a higher rate

— TL1 messages can be used to select the streams that are to be part of the output DS3 signal

— the DS3 output is created by selecting for each of its DS2 slots, the corresponding DS2 on either DS3 #1, #2 or #3 inputs

— DS3 X-bits is set to one but can be changed later by other equipment without affecting the decoding of the signal at the receiving end

— DS3 C-bits is not used and is set to zero but can be changed later by other equipment without affecting the decoding of the signal at the receiving end

— dip-switch control (software control override using TL1) to disable alarms for inactive DS3 inputs

• IMux features include:

— designed to demultiplex, from a single DS3 signal, MPEG-2 streams placed in N x DS2 contiguous slots, into up to three output DS3 signals containing the selected streams

— TL1 messages can be used to select the streams that are to be separated from the DS3 input signal

— receives one DS3 stream and generates three DS3 outputs with the appropriate datastreams

— the three DS3 outputs are locked to the incoming DS3 signal



2-7

Signal flowThe signal flow of a DV-MPEG encoder and decoder is shown in Figure 2-1.

The signal flow of a DV-323 Mux/IMux is shown in Figure 2-2.

Figure 2-1DV-MPEG encoder and decoder signal flow diagram

FW-3538

NTSC/PAL (or D1 video for Model 200)

MCU channel to select:- video & audio sources- DS2 starting slot- value of N in "NxDS2"- slave or self-generation of serial clock

Analog audio (x2)or Digital AES/EBUaudio

DV-MPEGencoder

DS3 IN

Serial Clock IN

DS3 OUT

Serial Data OUT

Serial Clock OUT

MCU channel to select:- video & audio outputs- DS2 starting slot- value of N in "NxDS2"

Analog audio (x2)or Digital AES/EBUaudio

DV-MPEGdecoder

DS3 IN

Serial Data INSerial Clock IN

DS3 OUTNTSC/PAL (or D1 video for Model 200)


2-8


Figure 2-2DV-323 Mux/IMux signal flow diagram

FW-3550

DS3 In

DS3 OutDS3 In

DS3 In

TL1 control

Mux signal flow:

DS3 In signals: Up to a maximum of three DS3 inputson the BNC connectors; each input carries streamsorganized in groups of N x DS2 slots.DS3 Out signal: One DS3 output on the BNC connectorconsisting of the selected signals in the input with DS2slots reassigned.

DS3 Out

DS3 In DS3 Out

DS3 Out

TL1 control

IMux signal flow:

DS3 In signal: One DS3 input on a BNC connectorcontaining up to three DS3 signals organized ingroups of N x DS2 slots in continuous slots.

DS3 Out signals: Up to a maximum of three outputs onthe BNC connectors; each output consists of a DS3signal with each stream placed in N x DS2.The first slot is always slot 0.

MUX

IMUX



Typical configurations Figure 2-3 shows a typical configuration and wiring of DV-MPEG encoders and decoders.

Figure 2-4 shows a typical configuration of a DV-323 Mux/IMux for concentrating DV-45 DCS data (up to four T1 inputs) and MPEG2 streams (embedded in two other DS3s) onto one DS3 signal. A DV-323 Mux/IMux optimizes the use of DS3 signals within a network configuration.

Figure 2-3DV-MPEG encoder and decoder interconnect configuration example

FW-3429

DS3 IN

DS3 IN

DS3 OUT

DS3 IN

DS3 IN

DS3 INDS3 OUT

DS3 OUT

DS3 IN

NTSC OUT

2 Audioout

NTSC OUT

2 Audioout

NTSC OUT

2 Audioout

DS3 OUT

DS3 OUT

VideoNTSC

2 Audio in

2 Audio in

2 Audio in

AES/EBU

VideoNTSCAES/EBU

VideoNTSCAES/EBU

Coder Decoder

Decoder

Decoder

Coder

Coder

Transmissionequipment

Transmissionequipment


2-10 DV-MPEG circuit pack descriptions

Figure 2-4DV-323 Mux/IMux network configuration example

FW-3543

DV-MPEG encoder functional descriptionA DV-MPEG encoder has four main subsystems (Figure 2-5):

• Encoder motherboard

• Video encoder daughterboard

• Multiplexer daughterboard

• Audio encoder daughterboard

The encoder motherboard takes in NTSC/PAL analog video and samples it. Closed caption information is extracted from the analog video signal on the motherboard. The buffered analog video is then multiplexed and the resulting digital video is sent to the video encoder daughterboard for selected compression. Analog audio is fed into a selectable attenuation pad, and then sent to the audio encoder daughterboard. Digital audio goes into a serial to parallel converter and is then sent to the audio encoder daughterboard.

Output PES streams from the video and audio encoder daughterboards are fed into the multiplexer subsystem to create the MPEG-2 Transport data stream. Closed caption is added in as user data.

The output of the multiplexer drives the RS-422-compatible drivers, and the DS3 encoder. Clocking the MPEG stream out can be derived from the DS3 circuitry, which also drives the internal serial clock source, or from an external clock source over the serial interface.

The 68302 microprocessor on the motherboard handles all alarm functions, clock source and rate selections, and communications with the encoder daughterboard.

DCS DCS

MPEG2encoder

MPEG2decoder

MPEG2encoder

MPEG2decoder

Network Network Network323Mux

323IMux

DS3 DS3

DS3 DS3

DS3 DS3

DS3

DS3 DS3 DS3

DS3

DS3

DS3

DS3

4 T1s 4 T1s



Detailed functional descriptions of the four main DV-MPEG encoder subsystems follow.

Figure 2-5Block diagram of a DV-MPEG encoder

FW-3425

Encoder motherboardThe main functions provided by the DV-MPEG encoder motherboard are:

• backplane connection to the DV-45 shelf for power, signal inputs and outputs, and MCU system level control

• power module to generate the required voltages for the circuit pack. Input is -48 V dc, and outputs are +5 V at 1.2 A, +9.6 V at 0.5 A , and -12 V at 0.5 A. Additional external regulators generate +10 V, -10 V and +3.3 V

• DS3 receive, demux, insert, and remux, and DS3 transmit circuits

• attenuation block for audio input level selection of 8 dBm or 18 dBm

• interface to MPEG audio encoder daughterboard

• 68302 microprocessor subsystem for controlling DS3 operation, alarm monitoring, and communication to DV-45 shelf processor

• 1k x 8 EEPROM for alarm history storage

Clock

Clock

DS2/DS3I/F

68302system

Videoencodermodule

Transportstream

multiplexmodule

Audioencodermodule

CCacquisition

Analogcomposite video

A/D

4:2:0 video

Backplaneconnections

DS3 IN

CLK + CTRL

Transportstream

DS3 OUT

Clock IN

VideoPES

AudioPES

SerialI/F

I/F

I/F

AES/EBU

Analogaudio

I/F

I/F

Clock

Clock

DAT

Model 200

Model 200



Analog video data pathThe type of analog video input to the circuit pack is NTSC or PAL and is selected by a dip switch read by the 68302. NTSC is the default input. The video signal is fed into two video buffers, one for each video chip. The closed caption chip is on the motherboard, while the second chip drives the video analog-to-digital converter on the encoder daughterboard.

Digital video data path (Model 200 only) Digital video goes into a three-chip set that provides the following functions: automatic cable equalization, automatic tuning, and serial to parallel conversion. The circuit is designed to lock on to a 270 Mb/s signal (SMPTE 259 or CCIR 656). Only the most significant eight of the 10 data bits are used. The motherboard outputs these eight bits of parallel data and the associated clock to the encoder daughterboard.

Analog audio data pathAnalog Left and Right channel audio are differential signals from the rear screw terminals and terminated into a 600 ohm load. They are routed to a differential passive attenuation pad on the motherboard. Input levels are user selectable via a pair of jumpers for either 8 dBm peak or 18 dBm peak. The audio output of the pad is sent to the audio encoder daughterboard where analog-to-digital conversion and compression take place.

The output of the audio encoder is sent to the multiplexer daughterboard for incorporation into the MPEG Transport stream. The clock going to the audio encoder daughterboard used for audio sampling is phase locked to the video encoding clock to ensure proper time sampling of the signal and guarantee lip-sync at the decoder.

Digital audio data path (Model 200 only) Digital data is received over twisted pair cable connected to the rear panel screw terminals. The input signal is at RS-422 differential levels and is transformer coupled. AES/EBU Professional and S/PDIF Consumer formats are supported. The motherboard contains the recovery circuitry to extract the audio data. These data are fed to the audio encoder daughterboard digital input which is multiplexed with the previous analog audio inputs. Data out of the audio encoder daughterboard is handled in the same way as with analog video.

Closed caption data extractionClosed captioned data from NTSC composite video line 21 is extracted by an acquisition chip and sent to the control microprocessor on the encoder daughterboard. When data for the current line has been captured, an interrupt is sent to the control microprocessor. The resulting user data packets are then sent to the multiplexer daughterboard along with video data.



Program Clock Reference (PCR) generationProgram Clock Reference (PCR) packets are generated and placed in the Transport stream at least every 100 msec. The program clock reference identifier is set to the value 4130 (PCR-PID=4130).

Clock generationClock selection can be controlled by DIP switch on the motherboard, the status of which can be read by the 68302 microprocessor. There are two options for the clock source. The first is based on an externally generated clock fed into the serial clock IN terminals. The second is based on the DS3 circuit clock, and can either be free running, or synchronized to an input DS3 signal.

When the internal clock mode is selected the free running local oscillator of the DS3 circuit is used. The rate is determined by how many DS2 groups are selected on DIP switch SW2, and is limited to either 1 or 2. For one DS2 the rate is 6.28 Mb/s, for two DS2s the rate is 12.56 Mb/s, and for three DS2s the rate is 18.84 Mb/s. If an external DS3 is connected to the board, then the local oscillator is synchronized to that signal’s bit rate.

When the external serial clock is selected, it is used as the master clock for encoding the transport stream (TS). It is regenerated and sent out to the serial clock out terminals. The Clock out signal should be used by the equipment receiving the bitstream from the encoder—this could be an OEM (original equipment manufacturer) decoder, inverse data multiplexer, or AAL-5 TS multiplexer.

The serial port uses a new low-amplitude high-speed driver and receiver technology called LVDS (low voltage differential signaling) that is compatible with most standard serial devices. The higher data rates that the interface operates at may experience problems if used with non-DV-MPEG devices. If transmission problems are encountered, consult the operating manual of the other device and stay within its maximum specified data rate. Cables between DV-MPEG and standard RS-422 products should be kept as short as possible.

DS3 to DS2 demultiplexer circuitThe function of the DS3 demultiplexer circuit is to break down the incoming DS3 into seven DS2 bit streams, break down the MPEG bit stream into the selected number of DS2 groups, then multiplex them all back into an outgoing DS3 signal (Figure 2-6). The DS3 circuit can operate in a Terminal or Repeater mode.

When in Terminal mode, there is no incoming DS3, and clocks are generated locally. The outgoing DS3 is comprised of the MPEG data stream in the selected number of DS2 streams, and padding for the remaining DS2 streams.



When operating in Repeater mode, the incoming DS3 is broken down into the seven DS2 streams. The serial MPEG data from the multiplexer daughterboard is also broken down into the number of DS2 groups determined by the current operating state. These DS2s then replace the incoming DS2s as selected by the base of the current operating mode. The DS3 is then regenerated and driven out. The clock for the MPEG data is generated locally, and any slip between it and the incoming DS3 is accommodated with padding bits.

Figure 2-6Block diagram of a DV-MPEG video encoder DS3 to DS2 multiplexer circuit

FW-3427

The encoder can transmit MPEG data on one, two, or three DS2 subchannels of the DS3. The DS2s used must be consecutive, and can not wrap around from channel seven to one.

Video encoder daughterboard The DV-MPEG Model 200 Decoder requires a daughterboard. It uses the same printed circuit boards as the redefined Model 100 by populating the required circuits. The video encoder daughterboard receives a digital serial 4:2:2 stream and compresses it using the selected I, IP or IBP MPEG-2 mode into a video PES stream. See Figure 2-7 for a block diagram of the video encoder daughterboard. The video packet identifier is set to the value 31 (VI-PID=31).

MPEG2 data

MPEG2 Clk

Osc37.697M N/6

CPU

SelectOsc

44.736M

Driverand LBO

DS3Tx

MUX

DS2-X

Pulseshape

DS3 OUT

DS3 INData

1

2

3

/6 Clk x

1

2

3

Clk

P/SFIFO

DS3 Rx DS2-xAGCandCLK

recovery

N=1, 2, or 3



Microprocessor subsystemThe 80251 microprocessor controls all functions on the daughterboard, communicates with the motherboard 68302 and Mux module 8051 through dual port RAMs, directly accesses the closed caption chip, and the audio encoder daughterboard on the motherboard.

The 80251 begins execution out of the EPROM circuit, but will look to see if the flash memory has been programmed. If the Update code in the flash memory has been set, the microprocessor enables address mapping of the flash memory. The flash memory is mapped over the EPROM for code fetches, so execution from the flash memory begins with the very next instruction fetch after the I/O write.

Video input pathDigital 4:2:0 video data (Model 200 only) comes onto the daughter board in 8 bit parallel format. It is converted to 16-bit parallel format with synchronization signals for active video area and field identification.

Composite video is fed into the Video Input Processor. It is terminated into 75 ohms at the chip and capacitively coupled to the input. The video input processor performs the function of demodulation, sampling and conversion to 4:2:0 data values (Model 200 only). The input mode of the chip (NTSC/PAL) is programmed based on the dip switch selection, or any overriding settings in non-volatile RAM (NVRAM).

Figure 2-7Block diagram a DV-MPEG video encoder daughterboard

FW-3428.1

Test signal generator(color bar)

NTSC/PALDemod and

color conversion

3x8

3x8

3x8

Y

Cr

Cb

Y

Cr

Cb

SMPTE259 M

Serial-ParallelVideoMUX

27 MHzclock

IBMEncoderchipset

andassociated

h/w

DRAM

Y

Cr

Cb

Pattern

Note: CC extraction not shown

Analog

Digital

Videoinputs

Daughterboardconnectors


3x8FIFOandPES

i/f

VideoPES

stream

Model 200



Video test patternThe test pattern is a sequence of digital values fed into the encoding chip. Each value is read out of a memory one-line deep, and represents a YUV value for that pixel. To initialize the data, the 80251 writes 720-16 bit words into the memory, then reads into a circular manner, in other words rereads the same values for every line. The test pattern FIFO (first-in first-out) can be selected by writing to a video source PLD (programmable logic device).

DIP switch functionsThe video encoder daughterboard has an eight position dip-switch to control local functions. These settings are used as the power on defaults. If the mode selected on the motherboard dip-switch differs from those selected on the daughterboard, the motherboard setting prevails.

Multiplexer daughterboardThe multiplexer daughterboard has three dedicated input sources from the motherboard: one video stream, one audio stream, and one source of PCR packets (Figure 2-5). It multiplexes these streams into Transport Streams. The output bit rate is determined by how often the data is emptied from a rate control FIFO.

The multiplexer operates in a continuous mode once encoding has started. With no data at the input, the multiplexer daughterboard stuffs the output to the maximum bit rate using empty MPEG packets.

Audio encoder daughterboardThe audio encoder daughterboard is a single monolithic module that is plugged onto the encoder motherboard. It accepts analog audio or AES/EBU digital audio (Model 200 only) and compresses it, using the MPEG-1 Layer 2 algorithm, into a Packetized Elementary Stream (PES) (Figure 2-8). The module supports two analog inputs each having 16-bit analog to digital converters. The basic input level is balanced stereo, 8 dBm. There is also a provision to receive inputs at 18 dBm. This is controlled by a set of jumpers on the motherboard. The output is a PES that is fed into the multiplexer module for inclusion into the transport stream. The audio packet identifier is set to the value 32 (AU-PID=32).

The motherboard generates a clock that is phase locked to the video encoding clock and feeds it to the audio encoder daughterboard. The audio encoder daughterboard uses this clock to generate timing information for the output stream using Presentation Time Stamps (PTS). This allows the decoder to keep decoded audio and video in synchronization.



Figure 2-8Block diagram a DV-MPEG audio encoder daughterboard

FW-3443

DV-MPEG decoder functional description A DV-MPEG decoder has two main subsystems (Figure 2-9):

• Decoder motherboard

• Decoder daughterboard

The decoder motherboard receives a DS3 signal consisting of up to 7 DS2 signals into the DS3/DS2 multiplexer, and distributes out an N x DS2 rate MPEG audio and video signal. This MPEG stream is identified by its position in the DS3 signal. The stream is sent to the decoder daughterboard, which decodes the stream into its separate audio and video components. The output can be either analog or digital (Model 200 only). For analog output, the decoder outputs NTSC or PAL video, as selected, with an accompanying analog audio. The Closed Caption is then reinserted into the video signal. The DS3 signal is passed on without modification to downstream boards.

The 68302 microprocessor on the motherboard handles all alarm functions, clock source and rate selection, and communication with the decoder daughterboard.

Detailed functional descriptions of the two main DV-MPEG decoder subsystems follow.

InputSEL

DigitalinterfaceAES/EBU

Analogleft-right

Analoginterface

Host interface

Encoder CPUinterface

MPEGencoder

Systemclock

register

Encodeclock

Buffer FIFO PES data

Model 200



Figure 2-9Block diagram of DV-MPEG decoder

FW-3441

DS3/DS2Mux

68302controller

Backplaneconnector

Backplaneconnector

DS3 IN

RS-232

Main serial

48V B1, B2EPROM512K x 8

Softalarm

DC/DCpowermodule

Reg +3.3V+5V+10V+12V-10V-12V

Reg

Reg

SRAM128K x 8

EEPROM2K x 8

RS-422 Data/Clock input

Dip switches

Alarm LEDs

Decodermodule D1 OUT

Audio LAudio R

AES/EBU

Leveloptions

Videobuffer

DS3 OUT

Audioamp

Comp video

Model 200



Decoder motherboardThe main functions provided by the DV-MPEG decoder motherboard are:

• Backplane connector to interface with the MCU and provide signal connections for all the inputs and outputs

• Power supply modules to provide +5 V, +3.3 V, ±10 V, and ±12 V from a -48 V (nominal) power source

• DS2-DS3 extractor; also provides the decoder demultiplexer a reference clock which is used to latch in the input data. The N x DS2 stream is taken from an incoming partially- or fully-filled DS3 stream

• Control 68302 CPU with Flash RAM: this CPU manages the entire decoder. It handles all relevant tasks such as initialization, communication with the DV-45 backplane and shelf processor, for example the MCU

• Connects to the daughterboard

Audio pathSingle-ended audio is received from the video decoder daughterboard. The signal first goes throught a configurable gain stage. The default is either +8 dBm or +18 dBm differential 600 ohm output. If jumpers JP2 and JP3 are set for low level, the output level is 8 dBm. If they are set for high level, the output level is 18 dBm. It is then routed to the backplane as a differental 600 ohm source.

Video pathVideo is received from the daughterboard. The video is then buffered and fed to the BNC video connector on the back panel.



Figure 2-10Block diagram of a video decoder DS3 to DS2 demultiplexer circuit

FW-3442

Circuit pack dip switchesThe decoder can receive MPEG data on one, two, or three DS2 subchannels of the DS3. The DS2s used must be consecutive.The DS2s used cannot wrap around from seven to one.

DS3 to DS2 demultiplexerThe DS3 to DS2 demultiplexer extracts the DS2 data streams requested (Figure 2-10). The incoming DS3 is split into seven DS2 streams. the multimplexer selects the DS2 sequence, copies it to a FIFO buffer, and then reassembles the seven DS2s in a regenerated DS3. The clock for the MPEG stream constructed from the selected DS2s is recovered from the DS3 signal and constantly adsjusted by the local oscillator.

DS3 INCLK

DS3Rx

DS2-x

MUX

P/S FIFO

N/6

CPU

OSC37.872M

1

/6Select

CLK-x

DS3Tx

DS2-xPulseshape

DriverandLBO

DS3 OUT

OSC44.736M

2

3

1

2

3

Data

AGCandCLK

recovery

MPEG2 data

MPEG2 Clock

N=1, 2, or 3



Figure 2-11Block diagram of a video decoder daughterboard

FW-3446.1

Decoder daughterboard This board contains the Transport Stream demultiplexing function which also contains the Clock Recovery circuit. The output of this block feeds both the MPEG-2 video decoder and the MPEG-1 layer 2 audio decoder, which then drives the appropriate digital-to-analog converters. See Figure 2-11.

The video decoder daughterboard has the following data input paths:

• serial data stream from the RS-422 compatible serial input port that uses a technology called LVDS (low voltage differential signaling)

• serial data stream from the DS3 signal connected through the back panel BNC connector. The motherboard extracts the DS2 signals from the DS3 and delivers the data to the video decoder daughterboard by way of the MPEG data and clock signals

MPEG-2Transport

streamdemux

MPEG-2video

decoder

Clockrecovery

Note: CC insertion not shown



Serialdigitalvideo

Analogcompositevideo

Analog audiobaseband

Digital AES/EBU audio

3x8

1

DRAM SMPTE259 M

parallel-serial

Colorconversion

andNTSC/PAL

mod

Audiodecoder

1

2 signals

1 signal

MPEG datafrom DS3

Model 200

Model 200

RS-422Data/Clock



The video decoder daughterboard has the following data output paths to the motherboard:

• composite video

• serial digital video (Model 200 only)

• single ended audio (L & R stereo)—balanced 600 Ω• AES/EBU or S/PDIF digital audio (Model 200 only)

Transport stream demultiplexerCore functions:

• The demultiplexer chip directs the video, audio, and data streams into queue structures in the local DRAM.

• Extracts PTS values from the PES headers and saves them into the local DRAM for use by the video decoder.

MPEG video decoderThe MPEG video decoder can decompress MPEG-2 Main Level, Main Profile video at a sustained rate of 3 to over 15 Mb/s. It generates a digital video signal with a CCIR resolution of 720 pixels/line x 480 line/frame in NTSC format and 720 pixels/line x 576 line/frame in PAL format. The decoder transfers video data from the demultiplexer chip into a local memory for proper MPEG decoding. This same memory also provides the function of a frame buffer.

MPEG audio decoderThe MPEG audio decoder is capable of decoding MPEG-1 layer I and II and also MPEG-2 audio PES packets. The output can be stereo or mono. Digital AES/EBU audio (Model 200 only) is also output. The input to the audio decoder is from the demultiplexer chip which gives out a parsed serial MPEG audio bit stream.

NTSC/PAL encoderThe basic NTSC/PAL encoder function is subcarrier generation and color signal modulation as well as insertion of synchronization signals (CC for Model 200 only).

4:2:0 serializer (Model 200 only)The 4:2:0 serializer accepts 8-bit or 10-bit parallel data and converts it into serial form for the purpose of interface or transmission according to the SMPTE 259/CCIR 686.



DV-323 Mux/IMux functional descriptionThe DV-323 Mux/IMux circuit pack (NT2H29AA) performs the MPEG-2 Mux and IMux functions. Selection of the Mux/IMux functions is done through software or a dip-switch.

Mux functionThe DV-323 Mux takes the content of up to three DS3s composed of MPEG2 bit-streams (on DS3 input #1, #2 or #3) or other streams (on DS3 #1 only), and, concentrate these streams into a single DS3 output. Each MPEG2 bit-stream has a rate of one, two, or, three times 6.2828 Mbit/s and are mapped to one, two or three times the DS2 rate before multiplexing. When a bit-stream uses more than one DS2, the DS2s must be contiguous. The circuit pack accepts data from other services (for example, GAMES, MUSIC, FM, DV45, DCS) on DS3 #1 and can multiplex this information on the selected DS2s of the DS3 output. A block diagram of the DV-323 Mux function is presented in Figure 2-12.

Figure 2-12Block diagram of the DV-323 Mux function

FW-3544

DS3 inputinterface

DS2stream select

6.2828 Mb/sstream select

Buffer

DS3 outputinterface

DS3 in

DS3 inputinterface

MPEG2extract

Buffer

Buffer

Buffer

Buffer

Buffer

Buffer

DS3 in

DS3 inputinterface

MPEG2extract

RAMEEPROM Control Switches

LEDs

Power

DS3 in

DS3 out

Clock lockedto DS3 #1

(switch selectable)

Mux7

7

7



IMux functionThe DV-323 IMux function generates up to three DS3 streams using the information contained in the incoming DS3 input. Each DS3 stream is built in order to prevent unauthorized decoders from accessing the other programs and to permit seperate routing of the DS2 payloads. A block diagram of the DV-323 IMux function is presented in Figure 2-13.

Figure 2-13Block diagram of the DV-323 IMux function

FW-3545

DS3 inputinterface

Selection of DS2s fromthe DS3 input

DS3 outputinterface



DS3 in

RAMEEPROM

Control SwitchesPowersupply

DS3 out

DS3 outputinterface

DS3 out

DS3 outputinterface

DS3 out

Clocks lockedto DS3 input

LEDs


3-1

TBOS alarm indications 3-This chapter lists the DV-MPEG codec and DV-323 Mux/IMux alarms, the conditions that initiate them, and their interpretation.

DV-45 alarm system overviewThe central processing unit (CPU) of a DV-MPEG codec detects and diagnoses alarms. The CPU routes alarms to the codec’s faceplate and the internal maintenance bus (M-bus) on the DV-45 shelf backplane. A DV-45 maintenance control unit (MCU) collects alarms from the internal M-bus on the DV-45 shelf backplane, classifies them as major or minor, stores them in memory, and routes them to parallel (relay closure) and either E2A-telemetry byte oriented serial (TBOS) or Transaction Language 1 (TL1) alarm surveillance ports at the rear of the DV-45 shelf. Without the MCU, only the LED faceplate indicators on the DV-MPEG circuit packs are provided for DV-MPEG alarm surveillance and interpretation.

The alarm information collected by the MCU is the same information displayed on the circuit pack faceplates. Each DV-45 MCU only collects and reports alarm and status information for the DV-45 shelf in which it resides; that is, it does not support the remote collection and reporting of alarms and status information for equipment in other DV-45 shelves.

Most hardware faults are detected by self-checking circuitry. Alarm and status information is reported by the software as equipment or facility alarms. The CPU is reset whenever a software failure is detected. Alarms on channels provisioned as unequipped are not reported.

For more information on the E2A-TBOS and DV-45 TL1 alarm surveillance interfaces, see Digital Video Codec DV-45:

• Alarms and Surveillance, 323-1401-102, PEC NT2H7902

• Alarm and Trouble Clearing Procedures, 323-1401-543, PEC NT2H7902

• FWP02 3.03 Addendum, PEC NT2H7914

Note: Implementing TL1 alarm surveillance on DV-45-series equipment disables E2A-TBOS alarm surveillance, and vice versa.


3-2 TBOS alarm indications

Faceplate alarm indicatorsEquipment and facility alarms are indicated using colored light-emitting diodes (LED) on the faceplate of the DV-MPEG circuit packs.

For the DV-MPEG Model 100 and Model 200 encoders, refer to Table 3-1 for each alarm indication and its associated LED, and to Figure 3-1 for the location of each LED on the faceplate.

For the DV-MPEG Model 100 and Model 200 decoders, refer to Table 3-2 for each alarm indication and its associated LED, and to Figure 3-2 for the location of each LED on the faceplate.

For the DV-323 Mux/IMux , refer to Table 3-3 for each alarm indication and its associated LED, and to Figure 3-3 for the location of each LED on the faceplate.

Note: To eliminate related alarm indications, lower-level alarms are masked when associated higher-level alarms are generated.

Table 3-1DV-MPEG Model 100/200 encoders unit faceplate LED alarm indicators

LED Color Alarm Indication

DS3 Degraded Yellow This LED indicates a degraded signal is detected on the DS3 line. A DS3 degrade alarm is declared when more than 1*E-06 parity error is detected.

DS3 Failed Yellow This LED indicates the DS3 line has failed. A DS3 failed alarm is declared when no DS3 is received, the DS3 frame is not found, or the receiver clock loss signal is detected.

DS3 AIS Detected Yellow This LED indicates that a DS3 alarm inhibit signal (AIS) has been detected.

Input Clock Loss Yellow This LED indicates that a input clock loss alarm has been detected.

Loopback Yellow This LED is reserved for future use.

Video Test Active Yellow This LED indicates the status of the video signal. When lit, the video test signal is active.

Unit ON Green This LED indicates that the unit is active and functioning correctly.

Unit FAIL Red This LED indicates one or more equipment failure alarms, such as: battery A and B; power; clock module.



Table 3-2DV-MPEG Model 100/200 decoders unit faceplate LED alarm indicators



DS3 Failed Yellow This LED indicates the DS3 line has failed. A DS3 failed alarm is declared when no DS3 is received, the DS3 frame is not found, or the receiver clock loss signal is detected.


Input Clock Loss Yellow This LED indicates that an input clock loss alarm has been detected.

Loopback Yellow This LED is reserved for future use.

Black Active Yellow This LED is reserved for future use.



Table 3-3DV-323 Mux/IMux faceplate LED alarm indicators



DS3Failed Yellow This LED indicates the DS3 line has failed. A DS3 failed alarm is declared when no DS3 is received, the DS3 frame is not found, or the receiver clock loss signal is detected.


Mux:On IMux:Off Green This LED indicates the Mux function is active when lit and the Imux function is active when unlit.





Figure 3-1DV-MPEG Model 100 and Model 200 encoder unit faceplate LED locations

FW-0320

DV-MPEG ENCODERModel 100

STATUS

UNIT

DS3 DEGRADED

DS3 FAILED

DS3 AIS DETECTED

LOOPBACK

VIDEO TEST ACTIVE

ON

FAIL

DS3 Status

Video Status

INPUT CLOCK LOSS



Figure 3-2DV-MPEG Model 100 and Model 200 decoder unit faceplate LED locations

FW-0320.1

DV-MPEG DECODERModel 100

STATUS

UNIT

DS3 DEGRADED

DS3 FAILED

DS3 AIS DETECTED

INPUT CLOCK LOSS

LOOPBACK

BLACK ACTIVE

ON

FAIL

DS3 Status

Video Status



Figure 3-3DV-323 Mux/IMux module faceplate LED locations

FW-3546

Alarm port indicatorsAll equipment and facility alarms routed to the maintenance bus (M-bus) on the DV-45 shelf backplane are gathered by the MCU, classified as major or minor, and routed to parallel (relay closure), serial (E2A TBOS), and TL1 alarm ports at the rear of the DV-45 shelf (see Figure 3-4). The alarm information gathered is the same as the LED indications from the codec faceplate.

DS3 INPUT #1STATUS

DS3 DEGRADED

DS3 FAILED

AIS DETECTED

DS3 INPUT #2STATUS

DS3 DEGRADED

DS3 FAILED

AIS DETECTED

DS3 INPUT #3STATUS

DS3 DEGRADED

DS3 FAILED

AIS DETECTED

MUX ON MUX OFF

UNITON

FAIL

323 MUX-IMUX DS3 Degraded LED (Yellow)The incoming DS3 signal has degraded beyonda parity error threshold of 10-6.

DS3 Failed LED (Yellow)The incoming DS3 signal has failed.

AIS Detected LED (Yellow)A DS3 alarm inhibiting signal (AIS) is detectedat the DS3 input.

MUX-IMUX LED (Green)Inplements MUX function when lit and DEMUX function otherwise.

On LED (Green)The module is powered up.

Fail LED (Red)Hardware failure or battery failure has been detected.



Visual and audible indicators can be connected to the parallel, relay contact, port. A TBOS digital alarm scanner can be connected to the serial E2A1 RS-422 port. A TL1 alarm display system can be connected to the RS-232 DB25 ports (see “TL-1 alarms and provisioning” on page 4-1).

To determine alarm causes, see “Interpreting alarms and status indicators” on page 3-14.

Parallel alarm port The parallel port provides normally open (NO) and normally closed (NC) relay connections for major and minor visual (for example, lamp) and audible (for example, buzzer) indicators. All major and minor alarm indicators are activated upon power failure. An external alarm cutoff (ACO) connection is provided so that audible alarm indicators can be silenced (see Figure 3-4).

TL1 alarm portThe RS-232 DB25 ports provide a Bellcore-compliant DV-45 TL1 alarm interface for DV-45 network elements (NEs). TL1 implementation on DV-45 equipment allows a TL1 alarm display system to monitor remotely or locally TL1 alarm messages from a group of DV-45 shelves equipped with NT2H35KA or higher MCUs. For a full description of TL1 implementation on DV-45 equipment, see Digital Video Codec DV-45 FWP02 3.03 Addendum, PEC NT2H7914. For a detailed description of the functional requirements for a TL-1 interface deployment on DV-45 shelves, see “TL-1 alarms and provisioning” on page 4-1.

Serial alarm port The serial alarm port is an industry standard E2A, RS-422, port (see Figure 3-4) which can represent up to 512 alarm points (each point is represented by one bit). The alarm points can be accessed through the port eight bits at a time by a TBOS digital alarm scanner. For a full description of the serial E2A TBOS ports and alarm points, see Alarms and Surveillance, 323-1401-102, within the DV-45 Reference Manual, PEC NT2H7902.

Alarm points are used to represent the same alarms as those routed to the LED faceplate indicators on the DV-MPEG unit. All alarm points are mapped to bits and bytes according to the DV-45 shelf position of the DV-MPEG unit, or DV-323. A DV-45 MCU can be optioned for TBOS 1.0 or TBOS 2.0 E2A mappings and display addresses.

With TBOS version 1.0, each DV-45 shelf provides two E2A alarm and status displays: one for local DV-45 units, and one for remote units. TBOS version 2.0 provides four E2A alarm and status displays: two for local DV-45 units and two for remote units.



For DV-MPEG TBOS 1.0 mapping assignments, see Table 3-4 and Table 3-5. For DV-MPEG TBOS 2.0 mapping assignments, see Table 3-6 and Table 3-7. For DV-323 TBOS 1.0 mapping assignments, see Table 3-8 and Table 3-9. For DV-323 TBOS 2.0 mapping assignments, see Table 3-10 and Table 3-11.

Figure 3-4DV-45 shelf alarm port connections

FW-0301.2

(FW-301.2)

ALARMS

MON1MON2NOC

NCNO

CNCEXT ACO

BAT RETNOC

NCNO

CNC

MAJVISMAJAUD

MINVISMINAUD

T+T-R+R-T+T-R+R-

12345678

E2A1E2A2

OW

JACK

PORT-1

PORT-2

RS-232

Female DB25connectors



Table 3-4TBOS Version 1.0 Display 0 for DV-MPEG Models 100 and 200 encoders

Bit 7 6 5 4 3 2 1 Bit 0

Byte 1 Unit Fail #0

Video Loss #0

DS3 Fail #0

DS3 Drgr. #0

Unit Fail #1

Video Loss #1

DS3 Fail #1

DS3 Degr. #1

Byte 2 Unit Fail #2

Video Loss #2

DS3 Fail #2

DS3 Degr. #2

Unit Fail #3

Video Loss #3

DS3 Fail #3

DS3 Degr. #3

Byte 3 Unit Fail #4

Video Loss #4

DS3 Fail #4

DS3 Drgr. #4

Unit Fail #5

Video Loss #5

DS3 Fail #5

DS3 Degr. #5

Byte 4 Unit Fail #6

Video Loss #6

DS3 Fail #6

DS3 Degr. #6

Unit Fail #7

Video Loss #7

DS3 Fail #7

DS3 Degr. #7

Byte5 AIS Detect #0

Bad Channel Selected

AIS Detect #1


AIS Detect #2


AIS Detect #3

Bad Channel Detected

Byte6 AIS Detect #4


AIS Detect #5


AIS Detect #6


AIS Detect #7


Byte7 Unit Mismatch

Table 3-5TBOS Version 1.0 Display 0 for DV-MPEG Model 100 decoder

Bit 7 6 5 4 3 2 1 Bit 0

Byte 1 Unit Fail #0

Video Loss #0

DS3 Fail #0

DS3 Drgr. #0

Unit Fail #1

Video Loss #1

DS3 Fail #1

DS3 Degr. #1

Byte 2 Unit Fail #2

Video Loss #2

DS3 Fail #2

DS3 Degr. #2

Unit Fail #3

Video Loss #3

DS3 Fail #3

DS3 Degr. #3

Byte 3 Unit Fail #4

Video Loss #4

DS3 Fail #4

DS3 Drgr. #4

Unit Fail #5

Video Loss #5

DS3 Fail #5

DS3 Degr. #5

Byte 4 Unit Fail #6

Video Loss #6

DS3 Fail #6

DS3 Degr. #6

Unit Fail #7

Video Loss #7

DS3 Fail #7

DS3 Degr. #7

Byte5 AIS Detect #0


AIS Detect #1


AIS Detect #2


AIS Detect #3


Byte6 AIS Detect #4


AIS Detect #5


AIS Detect #6


AIS Detect #7


Byte7 Unit Mismatch



Table 3-6TBOS 2.0 Display for DV-MPEG Models 100 and 200 encoders

Bit 7 6 5 4 3 2 1 Bit 0

Byte 1 Unit Fail AIS Detect

DS3 Fail DS3 Degr.

Unit Fail AIS Detect

DS3 Fail DS3 Degr.

Byte 2 VSync Loss

Audio Loss

Test Active

VSync Loss

Audio Loss

Test active

Byte 3 Bad Chan. Selected

TEMP Minor

TEMP Major

Bad Chan. Selected

TEMP Minor

TEMP Major

Byte 4

Byte5

Byte 6

Byte 7

Unit x Unit x + 1

Table 3-7TBOS 2.0 Display for DV-MPEG Model 100 decoder

Bit 7 6 5 4 3 2 1 Bit 0

Byte 1 Unit Fail AIS Detect

DS3 Fai DS3 Degr.

Unit Fail AIS Detect

DS3 Fail DS3 Degr

Byte 2 VSync Loss

Audio Loss

Test Active

VSync Loss

Audio Loss

Test active

Byte 3 Bad Chan. Selected

TEMP Minor

TEMP Major

Bad Chan. Selected

TEMP Minor

TEMP Major

Byte 4

Byte5

Byte 6

Byte 7

Unit x Unit x + 1



Table 3-8TBOS version 1.0 Display 0 for DV-323 Mux

Bit 7 6 5 4 3 2 1 Bit 0

Byte 0

MCU reserv.

MCU reserv.

MCU reserv.

MCU reserv.

MCU reserv.

MCU reserv.

DS1 reserv.

DS1 reserv.

Byte 1

Unit Fail #0

LOS

#0

DS3 Fail#0

DS3 Degrad

#0

Unit Fail#1

LOS

#1

DS3 Fail#1

DS3 Degrad

#1

Byte2

Unit Fail#2

LOS

#2

DS3 Fail#2

DS3 Degrad

#2

Unit Fail#3

LOS

#3

DS3 Fail#3

DS3 Degrad

#3

Byte 3

Unit Fail#4

LOS

#4

DS3 Fail#4

DS3 Degrad

#4

Unit Fail#5

LOS

#5

DS3 Fail#5

DS3 Degrad

#5

Byte 4

Unit Fail#6

LOS

#6

DS3 Fail#6

DS3 Degrad

#6

Unit Fail#7

LOS

#7

DS3 Fail#7

DS3 Degrad

#7

Byte5

AIS detect

#0

Bad chan. select

AIS detect

#1

Bad chan. select

AIS select

#2

Bad chan. select

AIS detect

#3

Bad chan. select

Byte 6

AIS detect

#4

Bad chan. select

AIS detect

#5

Bad chan. select

AIS detect

#6

Bad chan. select

AIS detect

#7

Bad chan. select

Byte7

DS1 reserv.

DS1 reserv.

DS1 reserv.

DS1 reserv.

Unit Mis-

match

reserv.



Table 3-9TBOS version 1.0 Display 0 for DV-323 Imux

Bit 7 6 5 4 3 2 1 Bit 0

Byte0

MCU reserv.

MCU reserv.

MCU reserv.

MCU reserv.

MCU reserv.

MCU reserv.

DS1 reserv.

DS1 reserv.

Byte1

Unit Fail#0

DS3 Fail#0

DS3 Degrad

#0

Unit Fail#1

DS3 Fail#1

DS3 Degrad

#1

Byte2

UnitFail#2

DS3 Fail#2

DS3 Degrad

#2

UnitFail#3

DS3 Fail#3

DS3 Degrad

#3

Byte3

UnitFail#4

DS3 Fail#4

DS3 Degrad

#4

UnitFail#5

DS3 Fail#5

DS3 Degrad

#5

Byte4

UnitFail#6

DS3Fail#6

DS3 Degrad

#6

UnitFail#7

DS3 Fail#7

DS3 Degrad

#7

Byte 5

AIS detect

#0

AIS detect

#1

AIS detect

#2

AIS detect

#3

Byte 6

AIS detect

#4

AIS detect

#5

AIS detect

#6

AIS detect

#7

Byte 7

DS1 reserv.

DS1 reserv.

DS1 reserv.

DS1 reserv.

Unit Mis-

match

reserv.



Table 3-10TBOS 2.0 Display for DV-323 Mux

Bit 7 6 5 4 3 2 1 Bit 0

Byte 0 MCU reserv.

MCU reserv.

Byte 1 Unit Fail

AIS detect 1

DS3 Fail 1

DS3 Degrad1

Unit Fail

AIS detect 1

DS3 Fail 1

DS3 Degrad1

Byte 2 Bad chan. select

AIS detect 2

DS3Fail2

DS3 Degrad2

Bad chan. select

AIS detect2

DS3 Fail2

DS3 Degrad2

Byte 3 AIS detect3

DS3Fail 3

DS3 Degrad3

AIS detect 3

DS3Fail 3

DS3 Degrad3

Byte 4 LOS 1 LOS 2 LOS 3 LOS 4 LOS 1 LOS 2 LOS 3 LOS 4

Byte 5 LOS 5 LOS 6 LOS 7 LOS 5 LOS 6 LOS 7

Byte 6

Byte 7

Unit x Unit x + 1

Table 3-11TBOS 2.0 Display for DV-323 Imux

Bit 7 6 5 4 3 2 1 0

Byte 0

MCUreserv.

MCUreserv.

Byte 1

UnitFail

AIS detect

DS3Fail

DS3 Degrad

UnitFail

AIS detect

DS3Fail

DS3 Degrad

Byte2

Byte 3

Byte 4

Byte 5

Byte 6

Byte7

Unit x Unit x + 1



Interpreting alarms and status indicatorsUse the following information to help determine the probable cause of a DV-MPEG codec problem. Also refer to the trouble clearing guidelines provided in Digital Video Codec DV-45 Alarm and Trouble Clearing Procedures, 323-1401-543.

Most system communication problems are the result of faulty connections or incorrectly set option switches. Carefully check all cables in the communications path where difficulty has been experienced and ensure that the option switches on all circuit packs are set properly.

If you have connected the telemetry byte oriented serial (TBOS) or Transaction Language 1 (TL1) alarms interface from the maintenance control units (MCUs) on the DV-45 shelves, review the reports from the alarm monitoring system. These may suggest a fault location.

Clearing video signal trouble If the video is non-existent or of very poor quality, start at the source with a monitor and do a point-to-point check to isolate the faulty device or cable. Use standard test gear to test DS3 links.

If the video is washed out, check whether all required 75 Ω terminators have been installed. Install any missing 75 Ω terminators. Use distribution amplifiers if the signal needs to be split or broadcasted to two or more points.

If the quality of the DV-MPEG signal is not as good as expected, verify the source material. MPEG-2 compression is sensitive to input noise. Clearing noise at the input of the DV-MPEG encoder, if possible, improves the quality of the decoded signal.

Also do a point-to-point check of the encoder-decoder to verify system operation. This test should be performed with a standard clear source (for example, laser disc player) connected to the encoder. The encoder can be connected through the appropriate path (DS3 or serial) to the decoder. Finally the decoder output can be sent to a monitor. If this test works, a probable cause could be found in the cabling. If it is necessary, expand the test to include more than one encoder and/or decoders, and set the dip-switches on TL1 accordingly.

Clearing audio signal troubleIf the audio is non-existent or of very poor quality, check cable and connector continuity and option switches for correct settings. If the problem remains, start at the source with a Tektronix AM700 audio precision analyzer or Audio Precision SYS-22G analyzer and do a point-to-point check to isolate the faulty device or cable. Check that the audio level jumpers on both the encoder and decoder circuit packs are set correctly.



Clearing DS3 troubleIf the DS3 Degraded or Failed LED is lit on any of the DV-MPEG codec circuit packs, verify the integrity of the implicated DS3 link using standard test gear. Verify jitter and pulse shape if required. Also check cable and connector continuity.

If the DS3 failure occurs on a codec circuit pack directly interfacing with the transport network, verify that the transport network’s DS3 facility has been established. If it has, then verify the integrity of the DS3 link interface between the codec circuit pack and the transport network.

If the DS3 failure occurs on the first DV-MPEG encoder circuit pack in the DS3 chain, verify that the option settings on that circuit pack are set properly (terminal instead of repeater, or vice-versa).

If there seems to be problems to access the stream from a DS3 carrying multiple streams, verify the Line Build Out switch on the boards. If the cables are short (the attenuation value is low), set the attenuation to IN, otherwise, set the attenuation to OUT.

If the DS3 alarm inhibiting signal (AIS) Detected LED is lit on a DV-MPEG codec circuit pack, verify the integrity of the DS3 link between the codec circuit packs using standard test gear. Also check cable and connector continuity.

When looping several partially-filled DS3 signals through several encoders, ensure that the first encoder is in terminal mode and the remaining encoders in the chain are in repeater mode.

If the encoder is not the first in the chain, then verify that it is in repeater mode.

If the decoder is receiving a signal from the encoder, but there is no video or audio, check the DS2 dip switch settings. The decoder settings must exactly match the encoder settings.


4-1

TL-1 alarms and provisioning 4-This chapter establishes the functional requirements for the deployment of the TL-1 interface on a DV-MPEG codec.

TL-1 is an ASCII based management protocol typically used for provisioning and surveillance of Network Elements (NE) within a telecommunications network. TL-1 has traditionally served a dual purpose:

• as a local ASCII-based craft interface from a local console

• as a remote network management interface

TL-1 interface descriptionAccess to the TL-1 interface is done on a single RS-232 link provided through a rear access DB-25 connector located on the DV-45 shelf. The connector used is the twin of the one used for the TBOS interface. Only one link can be active at any one time.

The RS-232 link supports the asynchronous transfer of ASCII characters, and by default is configured for 8 data bits, no parity, and 1 stop bit (8N1) at 19200 baud.These parameters can be set manually using DIP switches located on the DV-45 maintenance control unit (MCU).

Character echo must be disabled to support a machine-to-machine interface. To use the interface locally, it is recommended that the Local Echo option on the connected terminal be enabled.

Remote IP access can be provided by connecting the RS-232 interface to a co-located Terminal Server.

Figures 4-1 and 4-2 illustrate examples of configurations for remotely and locally monitoring DV-MPEG TL-1 alarms.


4-2 TL-1 alarms and provisioning

Figure 4-1Example configuration for remotely monitoring DV-MPEG TL-1 alarms

Figure 4-2Example configuration for locally monitoring DV-MPEG TL-1 alarms

TL1 alarm display terminals

EthernetLAN

WAN

Router

Router

Terminalserver

Ethernet

RS-232

DV-45 shelvesequipped withNT2H35KA MCUs

VT100 terminal DV-45 shelfequipped withNT2H35KA MCU

Null modem



TL-1 parameters This section defines the various parameters used in the DV-MPEG TL-1 interface. Each parameter is listed with all supported values. For context dependent restrictions on parameter usage, see “TL-1 commands” on page 4-8.

AIDThe access identifier (AID) is used in conjunction with a secondary command code modifier (SCCM) or an access identifier type (AIDTYPE) to identify a specific managed entity instance within the Network Element (for example, facility, circuit pack). TL-1 does not impose a specific syntax or semantics on AIDs, but does make certain recommendations as follows.

Equipment AIDs may be:

• physical, based on the location of the equipment (for example, <frame_id>-<shelf_id>-<slot_id>)

• functional, based on the role of the equipment, (for example, PWRA - Power Unit A)

• an Office Equipment (OE) number

• a CLEI code

It is also possible to combine the functional and physical models (for example, PWRA-5-2 - Power Unit A in Shelf 5, Slot 2).

Facility AIDs may be:

• physical, based on location (for example, <frame_id>-<shelf_id>-<slot_id>-<port_id>)

• hierarchical, based on multiplexing (for example, 4-3, indicating the third DS1 within DS3 #4)

• based on some other system

Note: The AID does not have to include the type of entity being accessed, since messages with AIDs include either an SCCM or an AIDTYPE.

The DV-MPEG TL-1 implementation of AIDs is as follows:

• equipment (circuit pack) AIDs are of the form CPK-<slot_id> (for example, 0-7) and MCU

• facility AIDs are of the form <SCCM>-<slot_id>-<port_id>, where ports are numbered sequentially starting at 1

• specific AID assignments within a DV-45 shelf are detailed in “DV-MPEG circuit pack specific information” on page 4-28.



AIDTYPEThe access identifier type (AIDTYPE) is used in command responses and autonomous messages generated by the NE. It is equivalent to the SCCM used in commands and takes the same values, with the exception of ALL. ALL cannot be used since responses and autonomous messages refer to individual entities, whereas ALL is a wildcarding option.

ALMCDEThe alarm code (ALMCDE) is a two-character parameter included in alarm reports to indicate the severity of the highest severity event included in the report. The supported values are:

Note: The DV-45 does not support Critical alarms.

ATAGThe autonomous tag (ATAG) is a decimal number assigned by the Network Element to each autonomous message it generates. The numbers are assigned in sequence and may be up to 10 digits long. ATAG is used by the monitoring OS to detect any lost messages.

CONDEFFThe condition effect (CONDEFF) parameter indicates the effect of a non-alarmed event on the condition of the Network Element. It can have the following values:

Note: DV-45 does not support the reporting of transient conditions, with the exception of the SYSBOOT event which is reported when the MCU boots.

CONDESCRThe condition description (CONDESCR) is a detailed text description of an alarm or a non-alarmed condition. It is limited to 64 characters in length and is enclosed in escaped quotes (\”).

Parameters Description

** Major

*^ Minor

A^ Automatic message (cleared)


SC A standing condition has been raised

CL A standing condition has been cleared

TC A transient condition has occurred



CONDTYPEThe condition type (CONDTYPE) parameter uniquely identifies an alarm of standing condition. The supported values are:

Note: Values in italics indicate proprietary extensions to the TL-1 standard.

CTAGThe correlation tag (CTAG) is used to correlate responses with commands. Each command contains a CTAG with a value assigned by the managing system. Each response to that command contains the same CTAG value.

CTAGs consist of 0 to 6 alphanumeric characters and are fully supported by the DV-45 implementation of TL-1.


AIS Alarm indication signal

BLACK NTSC Black Active

CONTCOM Control Commands Failure

FERF Far End Receive Fail

INC IIncoming Failure

INT Internal Hardware Failure

LOF Loss of Frame

LOP Loss of Pointer

LOS Loss of Signal

LPBKLINE Line Loopback Active

MISM Mismatch

SYSBOOT System Reboot

T-BERL Line Degrade

T-BERP Path Degrade

T-BERS Section Degrade

TEMP High Temperature

T-LPR Low Optical Power

UNEQ Unequipped

VSYNC NTSC Vertical Sync Loss

YEL Yellow signal



DATEThe format for dates under TL-1 is YY-MM-DD. However, this implementation does not support time stamping due to hardware restrictions, therefore all mandatory date fields will be reported as “70-01-01”.

DIRNThe direction (DIRN) parameter identifies the facility direction affected by a given alarm or event. The supported values are:

NTFCNCDEThe notification code (NTFCNCDE) is a two-character code associated with each notification generated, and it indicates the effect of the associated event on the NE. The supported values are:

Note: DV-45 does not support critical alarms.


TRMT Transmit

RCV Receive

NA Not applicable


MJ Major alarm

MN Minor alarm

NA Not applicable

CL Cleared alarm



SCCMThe secondary command code modifier (SCCM) is used to refine the behaviour of a particular command by specifying the class of entities on which it is to operate (for example, facility type and circuit pack). The supported values for this parameter within DV-MPEG circuit packs are:

Note: Values in italic indicate proprietary extensions to the TL-1 standard.

SIDThe system identifier (SID) is used to identify a specific NE, and is normally provisioned on a per NE basis. The SID is included in each response and autonomous message generated by the NE.

In this implementation, the value will be fixed to "DV-45".

TIDThe target identifier (TID) can be included in command messages directed at the NE, and it is equivalent to the SID.


EQPT Addressable unit within the Network Element

OC3 SONET OC3 section/line

STS1 SONET STS1 Synchronous Payload Envelope (SPE)

T3 DS3 line/path

T2 DS2 line/path

NTSC NTSC video signal

GAME SEGA signal

MUSIC Digital music express signal

FM Baseband FM radio signal

BTSC BTSC audio signal

DCOM Data communications link

ALL All applicable entities

MPEG MPEG 2 signal

VIDEO Video signal

AUDIO Audio signal



TIMEThe format of time under TL-1 is HH-MM-SS. However, this implementation does not support time stamping due to hardware restrictions, therefore all mandatory time fields will be reported as “00:00:00”.

TYPEREPThe type report (TYPEREP) parameter is equivalent to CONDTYPE.

TL-1 commandsThis section describes the TL-1 provisioning command set of the DV-MPEG TL-1 implementation. All TL-1 provisioning commands initiate a reply response. The response either indicates that the operation is complete or that there are errors. The following is an example of a response that applies to all operations unless otherwise indicated.

Normal response Syntax:cr lflf^^^<SID>^<DATE>^<TIME> cr lfM^^<CTAG>^COMPLD cr lf;

ExampleDV45 70-01-01 00:00:00M RQ0001 COMPLD;

Error responseSyntax:cr lflf^^^<SID>^<DATE>^<TIME> cr lfM^^<CTAG>^DENY cr lf^^^<ERRCDE> cr lf^^^/*<error_text*/ cr lf;

ExampleDV45 70-01-01 00:00:00M RQ0001 DENYIIAC/* The only supported TID for this command is DV45 */;



DLT-rr (Delete attributes)This command will delete attributes of an object entity (rr) and is only used for the DV-323 Mux/IMux circuit pack.

SyntaxDLT-rr:[<TID>]:<AID>:<CTAG>:::<SPECIFIC BLK>;

rr is restricted to T3: DS3 termination.

TID is the network element (NE) target identifier and is restricted to “DV-45”.

AID is restricted to T3-<slot_id>-1, rr=T3; where <slot_id>=0 to 7.

CTAG is the correlation tag (0 to 6 alphanumeric characters) used to correlate responses with commands.

SPECIFIC BLK is restricted to the values shown in Table 4-1.

ExampleIndicate which DS2 to delete for a DV-323 Mux/IMux. For example, delete DS2 number 3 and three DS2 from card in slot 0:

DLT-T3:DV45:T3-0-1:RQ0001:::POS=T2-3,LEN=3;

Table 4-1TL-1 Delete attributes SPECIFIC BLK parameter values

Parameter Type Domain Description

POS

LEN

NUMERIC

NUMERIC

1 to 7

1 to 3

Indicates starting DS2 number to delete at location <ds3_id>.DV-323 IMux: <ds3_id>=1.

Indicates how many DS2 to delete on the outgoing DS3.

DS3 object entities (rr=T3)



ED-rr (Edit attributes)This command will adjust (edit) the service parameters (attributes) and appropriate state parameters of an object entity (rr).

SyntaxED-rr:[<TID>]:<AID>:<CTAG>:::[<SPECIFIC BLK>]:[<STATE BLK>];

rr is restricted to:


AID is restricted to:

• T3-<slot_id>-<ds3_id>: rr = T3

• VIDEO-<slot_id>-1: rr = VIDEO

• AUDIO-<slot_id>-<channel_id>: rr = AUDIO

• MPEG-<slot_id>-1: rr = MPEG

— <ds3_id>=1, 2, or 3

— <channel_id>=1 or 2

— <slot_id>:=0 to 7



STATE BLK indicates the status of the equipment. The only parameter that can occur in this block is PST: Desired Primary state. The PST parameter can only be used with the T3 termination and is restricted to IS (In Service) or OOS (Out of Service). It indicates the state of the DS3 input signals (provisioned/not provisioned).


T3 DS3 termination

VIDEO Video termination

AUDIO Audio termination

MPEG MPEG termination



Table 4-2 TL-1 Edit attributes SPECIFIC BLK parameter values


TL_MODE ENUM One of the following:

TERMINALREPEATER

Indicates terminal mode

LBO ENUM One of the following:

SHORTLONG

Indicates the Line Build Out (LBO) setting. Attenuates the signal depending on line length. Only functional for the DV-323 Mux/IMux

DS3 object entities (rr = T3)

D1_MODE ENUM One of the following:

FULLHALF

Indicates the D1 mode:

Full D1Half D1

FMT ENUM One of the following:

PALNTSC

Indicates the video format

SRC ENUM One of the following:

COMPOSITED1

Indicates the video source:

COMPOSITE (PAL/NTSC)D1 (Digital)

DST ENUM One of the following:

COMPOSITED1

Indicates the video destination

COMPOSITE (PAL/NTSC)D1 (Digital)

TST ENUM One of the following:

ONOFF (Default)

Indicates to generate test pattern

LPBK ENUM One of the following:

LINENONE (Default)

Reserved for future use

—continued—



BLACK ENUM One of the following:

ONOFF (Default)

Indicates to insert a black signal on the composite video output only.

FREEZE ENUM One of the following:

ONOFF (Default)

Indicates to frame freeze the video signal.

BIT_RATE NUMERIC 3.0 .. 15.0 Indicates the video encoding bit rate from 3.0 Mbits/s to 15.0 Mbits/s. The value selected by the user could be modified by the TX card to adapt correctly the video bit rate.

SETUP ENUM One of the following:

0 IRE7.5 IRE

Indicates the amount of setup to be included in the composite NTSC video signal.

ON-LOS ENUM One of the following:

FREEZEBLANKDISABLE

Indicates the frame store pattern on the decoder video output when the MPEG stream is lost.

VIDEO object entities (rr = VIDEO)

RATE ENUM One of the following:

4844

Indicates the audio sample rate.

48 kHz44.1 kHzAID type = AUDIO-<slot_id>-1/2

SRC ENUM One of the following

ANALOGDIGITAL

Indicates the audio source.

AID type = AUDIO-<slot_id>-1/2

LEVEL NUMERIC 0 .. 32767 Indicates the audio level.

AID type for audio left level:

AUDIO-<slot_id>-1.

AID type for audio right level:

AUDIO-<slot_id>-2.

—continued—

Table 4-2 (continued)TL-1 Edit attributes SPECIFIC BLK parameter values




MUTE ENUM One of the following:

ONOFF (Default)

Audio muting


BIT_RATE ENUM One of the following:

.32

.48

.56

.64

.80

.96

.112

.128

.160

.192

.224

.256

.320

.384

Indicates the audio encoding bit rate:

.32 Kbits/s

.48 Kbits/s


AUDIO object entities (rr = AUDIO)

CLK_SRC ENUM One of the following:

.DS2

.EXT

Indicates the MPEG clock source:

. DS2 clock

. External RS-422 clock

VI_PID NUMERIC 0 .. 65535 Reserved

AU_PID NUMERIC 0 .. 65535 Reserved

PCR_PID NUMERIC 0 .. 65535 Reserved

MODE ENUM One of the following:

.I

.IP

.IPB

Indicates type of MPEG2 encoding.

—continued—





Examples• Set the terminal/repeater mode of DVMPEG TX card in slot 0:

ED-T3:DV45:T3-0-1:RQ0001:::TL_MODE=TERMINAL;

• Set the MPEG clock source of the DVMPEG TX card in slot 0:ED-MPEG:DV45:MPEG-0-1:RQ0001:::CLK_SRC=DS2;

BIT_RATE NUMERIC 3.0 .. 26.0 Indicates the total encoding bit rate from 3.0 Mbits/sec to 26.0 Mbits/sec. The value selected by the user could be modified by the TX card to adapt correctly the audio/video bit rates.

SRC ENUM One of the following:

.DS3

.EXT

Indicates the MPEG source:

. DS3 source

. External RS-422 source

CHROMA ENUM One of the following:

420

Indicates the chroma format of the MPEG compression at the encoder; this option is not functional at the decoder.

MPEG object entities (rr = MPEG)

—end—





ENT-rr (Enter attributes)This command will enter attributes of an object entity (rr).

SyntaxENT-rr:[<TID>]:<AID>:<CTAG>:::<SPECIFIC BLK>;



AID is restricted to:T3-<slot_id>-<ds3_id>: rr = T3

— <slot_id>: 0..7

— <ds3_id>: 1..3



Parameter Description

T3 DS3 termination

Table 4-3TL-1 Enter attributes SPECIFIC BLK parameter values


FIRST

LEN

POS

NUMERIC

NUMERIC

NUMERIC

1 to 7

1 to 3

1 to 7

Indicates starting DS2 number to use at position <ds3_id>

Indicates how many DS2 to use

Indicates the position of outgoing DS2

DS3 object entities (rr=T3)



Examples• Set the first DS2 and a number for the DS3 to use for the MPEG card in

slot 0:ENT-T3:DV45:T3-0-1:RQ0001:::FIRST=T2-2, LEN=2;

• Indicate which DS2 to extract and where to insert them for a DV-323 Mux/IMux. For example, DS2 number 3 from DS3 number 2 (1 DS2 long) from a card in slot 0 to be inserted at DS2 position 5 on the outgoing DS3.ENT-T3:DV45:T3-0-2:RQ0001:::FIRST=T2-3,LEN=1,POS=T2-5;

• Indicate which DS2 to extract and on which DS3 to insert them for theDV-323 Mux/IMux. For example: DS2 number 3 from incoming DS3 (1 DS2 long) from a card in slot 0 to be inserted at DS2 position 5 on the outgoing DS3 number 2.ENT-T3:DV45:T3-0-2:RQ0001:::FIRST=T2-3,LEN=1,POS=T2-5;



REPT-ALM (Report alarm)This is an autonomous message generated by the network element to report the occurrence or clearing of alarmed events.

Syntaxcr lf lf^^^<SID>^<DATE>^<TIME> cr lf<ALMCDE>^<ATAG>^REPT^ALM^<SCCM> cr lf^^^"<AID>:<NTFCNCDE>,<CONDTYPE>,<SRVEFF>,,,,<DIRN>:<CONDESCR>”cr lf ;

Note 1: Each message will report a single transition in this implementation, although according to standards it may report many.

Note 2: The value of ALMCDE is restricted to **, *^ and A^.

Note 3: The value of NTFCNCDE is restricted to MJ, MN and CL.

Note 4: For alarms generated by specific DV-45 units, see “DV-MPEG circuit pack specific information” on page 4-28.

Examples• Loss of Frame, service affecting on slot 1, DS3 Port #1

DV45 70-01-01 00:00:00** 12345 REPT ALM NTSC "T3-1-1,T3:MJ,LOF,SA,,,,RCV:\"Loss of Frame\"";

• Previous Loss of Frame alarm has clearedDV45 70-01-01 00:00:00A 12350 REPT ALM NTSC "T3-1-1,T3:MJ,LOF,CL,,,,RCV:\"Loss of Frame\"";



REPT-EVT (Report event)This is an autonomous message generated by the network element to report the occurrence or clearing of conditions other than alarms.

Syntaxcr lf lf^^^<SID>^<DATE>^<TIME> cr lfA^^<ATAG>^REPT^EVT^<SCCM> cr lf[cr lf ^^^"<AID>:<CONDTYPE>,<CONDEFF>,,,,<DIRN>:<CONDESCR> ”1...cr lf ;

Note 1: Each message will report a single event in this implementation, although according to standards it may report many.


Examples• Black Signal detected on slot 1, Video Port #1

DV45 70-01-01 00:00:00A 12345 REPT EVT NTSC "VIDEO-1-1:BLACK,SC,,,,TRMT:\"Black Active\"";

• The previous Black Active condition has clearedDV45 70-01-01 00:00:00A 12345 REPT EVT NTSC "VIDEO-1-1:BLACK,CL,,,,TRMT:\"Black Active\"";



RTRV-rr (Retrieve attributes)This command will retrieve the service parameters (attributes) of an object entity (rr).

SyntaxRTRV-rr:[<TID>]:<AID>:<CTAG>;




• <slot_id>: 0..7

• <ds3_id>:1..3

• <channel_id>:1..2


Normal responseSyntax:cr lflf^^^<SID>^<DATE>^<TIME> cr lfM^^<CTAG>^COMPLD cr lf[^^^”<AID>::<SPECIFIC BLK>:<STATE BLK>”<cr>< lf> ;


T3 DS3 termination

VIDEO Video termination

AUDIO Audio termination

MPEG MPEG termination


T3-<slot_id>-<ds3_id> rr = T3

VIDEO-<slot_id>-1 rr = VIDEO

AUDIO-<slot_id>-<channel_id> rr = AUDIO

MPEG-<slot_id>-1 rr = MPEG



SPECIFIC BLK has a value that depends on:

• If AID is equal to VIDEO/AUDIO/MPEG, see Table 4-2 for SPECIFIC BLK values

• If AID is equal to T3 and the card type is equal to DV-MPEG RX/TX or DV-323 Mux, see Table 4-2 or Table 4-3 for SPECIFIC BLK values

• If AID is equal to T3 and the card type is equal to DV-323 IMux, SPECIFIC BLK has the format: <FROM>,<TO>:<LBO> with values restricted to:

— <FROM>:T2-1, T2-2, ..., T2-7

— <TO>: T2-1, T2-2, ..., T2-7

STATE BLK indicates the status of the equipment; its value is restricted to:

Examples• On the DV MPEG TX card in slot 0, the audio sample rate is set to

48 kHz, the audio encoding bit rate is 192 Kbits/s and the audio source is set to DIGITAL. The primary state of this DV-MPEG card is set to In Service, Normal (IS-NR).

CommandRTRV-AUDIO:DV45:AUDIO-0-1:RQ0001)

ResponseDV45 70-01-01 00:00:00 M RQ0001 COMPLD “AUDIO-0-1::RATE=48,SRC=DIGITAL,BIT_RATE=192:IS-NR” ;


IS-NR In Service, Normal

OOS-NR Out of Service, Normal



• On the DV-323 Mux card in slot 0, the input DS2 #1 from DS3 #1 is connected to DS2 #2 on the output DS3, and the input DS2 #2 from DS3 #1 is connected to DS2 #3 on the output DS3. The input DS2 #4 fromDS3 #1 is connected to DS2 #5 on the output DS3. The terminal mode is set to Repeater, the Line Build Out (LBO) is set to Short and the primary state is set to In Service, Normal (IS-NR).

CommandRTRV-T3:DV45:T3-0-1:RQ0001

ResponseDV45 70-01-01 00:00:00 M RQ0001 COMPLD“T3-0-1::FIRST=T2-1,LEN=2,POS=T2-2,TL_MODE=REPEATER,LBO=SHORT:IS-NR”“T3-0-1::FIRST=T2-4,LEN=1,POS=T2-5,TL_MODE=REPEATER,LBO=SHORT:IS-NR”;

• On the DV323 IMux card in slot 0, the input DS2 #1 from the input DS3 is connected to DS2 #2 on the output DS3 #1. The input DS2 #2 from the input DS3 is connected to DS2 #3 on the output DS3 #1. The input DS2 #3 from the input DS3 is connected to DS2 #4 on the output DS3 #1. The Line Build Out (LBO) is set to Short and the primary state is set to In Service, Normal (IS-NR).

CommandRTRV-T3:DV45:T3-0-1:RQ0001

ResponseDV45 70-01-01 00:00:00 M RQ0001 COMPLD“T3-0-1::T2-1,T2-2:LBO=SHORT:IS-NR”“T3-0-1::T2-2,T2-3:LBO=SHORT:IS-NR”“T3-0-1::T2-3,T2-4:LBO=SHORT:IS-NR”;



RTRV-ALM (Retrieve alarm)This command allows retrieval of active alarms which are normally reported automatically by REPORT ALARM.

The number of active alarms in a DV-45 shelf is relatively small. Therefore, in this implementation of the Retrieve alarm message, you will not be able to specify the type or severity of the alarms to be retrieved, or the specific equipment or facilities for which alarms are to be retrieved.

For the specific conditions retrievable for each type of DV-MPEG unit and their associated severities, see “DV-MPEG circuit pack specific information” on page 4-28.

SyntaxRTRV-ALM-<SCCM>:[<TID>]:<AID>:<CTAG>;

SCCM is restricted to ALL.


AID is restricted to ALL.


ExampleRetrieving all DV-45 shelf alarms:

RTRV-ALM-ALL:DV45:ALL:RQ0001

Normal responseSyntax:cr lf lf^^^<SID>^<DATE>^<TIME> cr lfM^^<CTAG>^COMPLD [cr lf^^^"<AID>,<AIDTYPE>:<NTFCNCDE>,<CONDTYPE>,<SRVEFF>,,,,<DIRN>:<CONDESCR>"]... cr lf;

Note 1: An abnormal response may report 0, 1 or more alarms.

Note 2: The value of NTFCNCDE is restricted to MJ and MN.



Response examples• No alarms active

DV45 70-01-01 00:00:00M RQ0001 COMPLD;

• Loss of Frame, service affecting on slot 1, DS3 Port #1 DV45 70-01-01 00:00:00M RQ0444 COMPLD "T3-1-1,T3:MJ,LOF,SA,,,,RCV:\"Loss of Frame\"";



RTRV-COND (Retrieve condition)This command allows retrieval of active conditions (including alarmed and non-alarmed conditions) which are normally reported automatically by REPORT EVENT or REPORT ALARM.

The number of active alarms/events in a DV-45 shelf is relatively small. Therefore, in this implementation of the RTVR-COND command, you will not be able to specify the type or severity of the conditions to be retrieved, or the specific equipment or facilities for which conditions are to be retrieved.

For the specific conditions retrievable for each type of DV-MPEG unit and their associated severities, see “DV-MPEG circuit pack specific information” on page 4-28.

SyntaxRTRV-COND-<SCCM>:[<TID>]:<AID>:<CTAG>;

SCCM is restricted to ALL.


AID is restricted to ALL.


ExampleRetrieving all standing conditions on a DV-45 shelf:

RTRV-COND-ALL:DV45:ALL:RQ0001;



Normal responseSyntax:cr lf lf^^^<SID>^<DATE>^<TIME> cr lfM^^<CTAG>^COMPLD [cr lf^^^"<AID>,<AIDTYPE>:<NTFCNCDE>,<TYPEREP>,<SRVEFF>,,,,<DIRN>:<CONDESCR>"]... cr lf;

Note 1: An abnormal response may report 0, 1 or more standing conditions.

Note 2: The value of NTFCNCDE is restricted to MJ, MN and NA.


Response examples• No alarms active

DV45 70-01-01 00:00:00M RQ0001 COMPLD;

• DS3 AIS, not alarmed, service affecting on slot 2, DS3 Port #1, and BlackSignal Active, not alarmed, not service affecting on slot 1, NTSC Port #1.DV45 70-01-01 00:00:00M RQ0444 COMPLD "T3-2-1,T3:NA,AIS,SA,,,,RCV:\"DS3 AIS\"" "Video-1-1,NTSC:NA,BLACK,NSA,,,,TRMT´\"Black Active\"";



RTRV-EQPT (Retrieve equipment) This command allows retrieval of the attributes for a given piece of equipment identified by the AID block. Initially, this command allows an MCU version to be determined through it’s PEC code.

SyntaxRTRV-EQPT:[<TID>]:<AID>:CTAG;


AID is restricted to MCU.


ExampleRetrieving MCU equipment attributes:

RTRV-EQPT:DV45:MCU:RQ0001;

Normal responseSyntax:cr lflf^^^<SID>^<DATE>^<TIME> cr lfM^^<CTAG>^COMPLD [cr lf^^^”<AID>::<SPECIFIC BCK>:<STATE BCK>”]...cr lf;

SPECIFIC BLK is composed of a comma delimited list of attribute types and values. Each attribute is gvien in the form TYPE=\”VALUE\”. Supported attributes are:

STATE BLK indicates the status of the equipment. It takes the value IS-NR for the MCU.

Response example V45 70-01-01 00:00:00M RQ0002 COMPLD “MCU::VENDN=\”Northern Telecom\”,EVER=\”NT2H30FA\”:IS-NR”;


VEND vendor identification string

EVER equipment version (PEC code)



RTRV-HDR (Retrieve header)This command instructs the Network Element to respond with a normal response indicating that the command was completed. It is intended primarily to test that the network element is responding on a periodic basis.

SyntaxRTRV-HDR:[<TID>]::<CTAG>;

ExampleRTRV-HDR:DV45::RQ0001;

INIT-rr (Reset entity) This command will reset an entity.

SyntaxINIT-rr[<TID>]:<AID>:<CTAG>;




Note: <slot_id>: 0..7


ExampleTo reset the unit in slot 1:

INIT-SYS::SYS-1-1:RQ0001;


SYS SYSTEM


SYS-<slot_id>-1 rr = SYS



DV-MPEG circuit pack specific informationThis section summarizes the specific TL-1 information for each type of DV-45 circuit pack required within a DV-MPEG system.

Note: Proprietary extensions to the TL-1 protocol are given in italics.

MCUSupported AIDs

Supported alarms

Supported AIDs Notes

MCU MCU AID does not include slot_id

AIDTYPE CONDTYPE NTFCNCDE SRVEFF Description

EQPT PWR MN NSA Power Failure

BATT MN NSA Battery Fail

CONTCOM* MJ/MN SA Control Commands Failure

SYSBOOT** NA NSA MCU Reboot

*Major if communications are lost with an OC3 unit, otherwise minor.

** Reported as a transient event (the only transient event reported by the DV-45).



DV-MPEG encoderSupported AIDs

Supported alarms


CPK-<slot_id> Can appear in slots 0 to 7

VIDEO-<slot>-1 Single NTSC input

T3-<slot_id>-1 Single DS3 output

AUDIO-<slot_id>-<channel_id> Multiple audio input

MPEG-<slot_id>-1 Single MPEG2 output


EQPT INT MJ SA Circuit pack failure

PROVERR MJ SA Bad channel selected

TEMP MN NSA Medium temperature

TEMP MJ NSA High temperature

DS3 LOF MJ SA Loss of frame

T-BERP MN SA DS3 path degrade

AIS NA SA DS3 AIS

VIDEO VSYNC MJ SA Video sync loss

LPBKLINE MJ SA Facility loopback active

TST NA SA Test pattern active

AUDIO LOS MJ SA Loss of signal

Note:The loopback feature is not supported with this model.



Supported configurations

AIDTYPE Parameter NTFCNCDE SRVEFF Description

DS3 FIRST NA SA First T2 of the program

LEN NA SA Length of the program

TL_MODE NA SA Terminal mode

VIDEO D1_MODE NA SA D1 mode

FMT NA SA Video format selection

SRC NA SA Video source selection

TST NA SA Generate test pattern

BIT_RATE NA SA Video encoding bit rate

SETUP NA SA 7.5 IRE setup

MPEG CLK_SRC NA SA MPEG clock source selection

MODE NA SA I, IP or IBP mode

BIT_RATE NA SA Total encoding bit rate

CHROMA NA SA MPEG compression chroma format

AUDIO RATE NA SA Audio rate selection

SRC NA SA Audio source selection

BIT_RATE NA SA Audio encoding bit rate



DV-MPEG decoderSupported AIDs

Supported alarms



VIDEO-<slot>-1 Single NTSC output

T3-<slot_id>-1 Single DS3 input

AUDIO-<slot_id>-<channel_id> Multiple audio output

MPEG-<slot_id>-1 Single MPEG2 input




TEMP MN NSA Medium temperature

TEMP MJ NSA High temperature



AIS NA SA DS3 AIS

VIDEO VSYNC MJ SA Video sync loss

BLACK NA SA Black active

TST NA SA Test pattern active

AUDIO LOS MJ SA Loss of signal

Note:The black active command is only functional on composite video output.





DS3 FIRST NA SA First T2 of the program


VIDEO FMT NA SA Video format selection

BLACK NA SA Insert black signal

FREEZE NA SA Freeze frame

TST NA SA Generate test pattern

DST NA SA Video destination selection

ON-LOSS NA SA Frame store pattern

MPEG VI_PID NA SA Video stream PID

AU_PID NA SA Audio stream PID

PCR_PID NA SA PCR stream PID

SRC NA SA MPEG source selection

AUDIO LEVEL NA SA Audio rate selection

MUTE NA SA Set audio level



DV-323 MuxSupported AIDs

Supported alarms




T3-<slot_id>-(1..3) Multiple directional DS3







AIS NA SA DS3 AIS

DS2 LOS MN SA Loss of signal


DS3 FIRST NA SA First T2 of the program in incoming T3


POS NA SA Position of the program in outgoing T3

LBO NA SA LBO for outgoing DS3

PST NA SA Primary DS3 state in service or out of service

TL_MODE NA SA Terminal mode



DV-323 IMuxSupported AIDs

Supported alarms









AIS NA SA DS3 AIS


DS3 FIRST NA SA First T2 of the program in incoming T3


POS NA SA Position of the program in outgoing T3

LBO NA SA LBO for outgoing DS3


5-1

DV-MPEG applications 5-The primary application of Nortel’s Digital Video Codec DV-45 system is digital video transport for commercial broadcasters, including television networks, video transport providers and telcos offering competitive cable service over hybrid fiber-coax networks. Other applications include high-quality interactive video for commercial and institutional customers such as business video conferencing and distance learning.

The DV-MPEG product line offer a means of transmitting high-quality video signals using much less bandwidth than DV-45B coders and decoders. The DV-MPEG encoders address low-latency interactive video applications with the Model 100, where latency is the delay experienced with video and audio distribution systems in real-time operation.

The DV-323 Multiplexer (Mux) and Inverse Multiplexer (IMux) circuit packs complement the DV-MPEG codecs by allowing network operators to use a smaller, fully-utilized number of DS3 channels on the trunk side of the central office (CO) for inter-office traffic.

DV-MPEG encoder and decoder applicationsThe DV-MPEG Model 100 I-Frame encoder provides a premium quality video image (I-frame processing) with low latency, making it an ideal choice for bidirectional (interactive or two-way) video applications such as:

• distance learning

• telemedicine

• remote arraignment

• premium video conferencing

Note: All of these applications can use the possibility of accessing servers to obtain video and multimedia material to enhance the effectiveness of the session.


5-2 DV-MPEG applications

The DV-MPEG Model 200 Encoder provides high quality video and more efficient use of bandwidth (IBP-frame processing) with medium latency, making it an ideal choice for unidirectional (one-way) video applications such as:

• long-haul video trunking (cable, satellite)

• video-on-demand (VOD)

• near video-on-demand (NVOD)

• high-definition television (HDTV)

For example, the trunking market can use unidirectional video for sending a number of video feeds to television operating centers, as well as for connecting video-on-demand (VOD) and multimedia servers to CATV transport networks. Furthermore, the CATV supertrunking (headend consolidation) market can use unidirectional video for connecting SHEs to MHEs through high-speed digital channels using OC-48 channels to link SHEs to MHEs. Here, MPEG-2 video can offer new services such as near-video-on-demand (NVOD), and specialty programs that do not require full quality coding for broadcast video as well as network distribution, for instance, in educational and government channels. These point-to-point transmission applications allow network operators to take full advantage of the services that MPEG-2 video can offer.

See Figure 5-1 through Figure 5-5 for typical DV-MPEG codec equipment configurations for DV-MPEG applications. Also see Chapter 4 of the Digital Video Codec DV-45 Ordering Information, 323-1401-151, within the DV-45 Reference Manual, PEC NT2H7902, for more system configurations that can be used for DV-MPEG applications.



Figure 5-1Main and related view video configuration

FW-3460

Figure 5-2Point-to-point configuration connection shown only on one side

FW-3453

FW-3460

DV45"B"

'100ENC@

6 Mb/s

DV-45 shelf

DS3To video center

DS3 containing 6xDS2 for DV45 Band 1xDS2 for DV-MPEG@6

Main view camera

Secondary camera

FW-3453

From Lout

'100ENC

'100DEC

'100ENC

'100DEC

DV-45 shelf DV-45 shelf

DS3

DS3



Figure 5-3DV-MPEG configuration using the serial connections

FW-3454

FW-3454

From Lout

'100ENC

'100DEC

DV-45 shelf Equipmentwith

RS-422 interfaceinput

(ex. TS-MUX)

Clock in

Clock inData in

Clock outData out

In port

Out port



Figure 5-4Room configuration (expanded view)

FW-3456

FW-3456

From Lout

'100ENC

'100DEC

DV-45 shelfDS3 out

AMP

AMP

DS3 in

TL1 input

Balanced pair+/-/gnd

Balanced pair+/-/gnd

Terminal(or PC)

MCU

Coax

Coax

A B A

B



Figure 5-5Multipoint configuration (with server)

FW-3457

RoomA1

Database

Mastercontrol cell

Multi-cellsystem

ctrl

Mastercontrol cell

RoomA2

RoomA3

RoomC3

RoomC2

RoomC1

FW-3457

Mastercontrol cell Room

B1Room

B2

RoomB3

RoomB3

Legend

Control lines

DS3



DV-323 Mux/IMux applicationsDV-323 Mux/IMux circuit packs complement the DV-MPEG codecs (Figure 5-6) by providing the ability to extract a certain number of streams, using multiple DS2 slots, from partially-filled incoming DS3 channels to combine them onto an outgoing DS3 channel. They also provide the inverse function where a number of DS2 streams are extracted from a single DS3 channel and placed on outgoing DS3 channels. This allows network operators to combine partially-filled DS3 channels coming into and out of the central office (CO) onto a single DS3 channel. Thus, a smaller, more optimized number of DS3 channels can be used on the trunk side of the CO for inter-office traffic.

A DV-323 Mux/IMux can be used for a number of video applications, including supertrunking, DS3 signal concentration and in areas such as distance learning, where multiple video signals are multiplexed into a single DS3 signal for transmission into the classroom. A DV-323 Mux/IMux also works with DS3 switches, whether analog or DS3-based.

Typical DV-323 Mux/IMux applications follow.



Figure 5-6Single site configuration for DV-MPEG codecs and DV-323 Mux/IMux units

FW-3455

323IMUX

323MUX

FW-3459

323MUX

323MUX

ABC

ABC

WXY

323IMUX

323MUX

323MUX

323IMUX

323MUX

323MUX

323IMUX

323MUX

323MUX

Z......

WXYZ......

A...

323MUX

B...

323MUX

C...

323IMUX

WX...

Y...

Z...

A...

B...

C...

WX...

Y...

Z...

323IMUX

323IMUX

323MUX

323MUX

323MUX

323IMUX

323IMUX

323IMUX

DS3trunkin/out

DS3trunkin/out

ENCOD

ENCOD

DECOD

DECOD

DECOD

DECOD

DECOD

DECOD

DCS

DCS

MCU

MCU

Roomcontroller

Roomcontroller

DS3 DS3

DS3 DS3

DS3

Otherrooms

Otherrooms

Central office Central office



Standalone concentration configurationFigure 5-7 shows a standalone situation, such as in a classroom/school situation, where a number of sources are producing signals in DS3 format. These could be DV-MPEG streams, each occupying N * DS2, each transported via DS3. The DV-323 Mux function is then used to aggregate the multiple DS3 signals onto one DS3 (or more, using multiple DV-323 Mux/IMux units) before going to the Central Office. Note that in the reverse path, the signals coming back are similarily concentrated onto one or more DS3 signals, and to send separate streams to separate classrooms the separation process is accomplished through the DV-323 IMux, as shown in Figure 5-7. In this case, all optical interfaces that carry DS3 signals (for example, OC3c channels) could be placed into a DV45 shelf in the communications room rather than in the classrooms. The DV-45 shelf monitoring is performed using the Transaction Language 1 (TL1) interface.

Figure 5-7Standalone configuration for DV-323 Mux/IMux units

FW-3458

Room A - DS3 in #1

Room B - DS3 in #2

Room C - DS3 in #3

323IMUX

DS3 in

323MUX

(Line in from CO)

DS3 out

(Line out to CO)

Communications roomFW-3458



Central office configuration Figure 5-8 shows a configuration depicting a Central Office (CO). On transmit side, the CO is receiving a number of DS3 signals on the access side and the network operator wishes to aggregate them before going to the trunk side. As well, on the receive side, returning signals need to be switched so that the proper DS2s are recombined before going to their destinations. This is shown in Figure 5-8.

Hence, DS3 signals trasnmitted from sources like classrooms, businesses, etc. are received from the access side of the switch and go through a DV-323 IMUX to be converted into DS3 signals carrying a single stream. These single stream signals enter the switch which vectors them to the appropriate ports on the trunk side where they are concentrated, using DV-323 MUXs, to use up the outgoing DS3 trunks efficiently (for example, signals A, B, C). On the return path (trunk side), the DS3 signals carry the streams packaged for efficient use of the DS3 signals, go through DV-323 IMUXs, are switched to the appropriate destination ports, where they are once again concentrated before going on the access lines (for example, signals W, X, Y, Z).

Note that one of the advantages of doing these operations resides in producing almost no impact on the operation of the current switch if a pure replacement of DV45 signals were made with MPEG-2 encoded signals. As it is, the use of DS3 signals provides reuse of the current switch. With respect to growth in the number of signals going through the switch, the number of ports would grow as it would have in the DV45 case.



Figure 5-8Central office configuration for DV-323 Mux/IMux units

FW-3459

323IMUX

323MUX

FW-3459

323MUX

323MUX

ABCWXY

323IMUX

323MUX

323MUX

Z......

A...

323MUX

B...

323MUX

C...

323IMUX

WX...

Y...

Z...

323IMUX

323IMUX

DS3trunkin/out

DS3

DS3

DS3

Business

Classroom

Broadcast

MPEG streamsover DS3


6-1

Ordering information 6-This chapter provides the information required for provisioning and ordering DV-MPEG codecs. Ordering information for equipment directly related to DV-MPEG codec provisioning is included. For other equipping rules, including a list of recommended spares, refer to Digital Video Codec DV-45 Ordering Information, 323-1401-151, within the DV-45 Reference Manual, PEC NT2H7902.

DV-MPEG units can be used in a number of different applications. See Chapter 4 for typical configurations.

Provisioning DV-MPEG unitsTable 6-1 provides the codes required to order DV-MPEG codecs from Nortel. Table 6-2 provides the codes required to order DS3 cables.

Equipment produced by Nortel is identified with a product engineering code (PEC). Use this code or the circuit pack code (CPC) to order equipment from Nortel. The Bellcore common language equipment identifier (CLEI) is also used to identify equipment.

Note 1: The DV-MPEG units can be used with existing DV-45 MCUs if they are upgraded to NT2H35KA or later vintage. The upgrade can be made by replacing the EPROMs with those provided in the NT2H99KA MCU EPROM upgrade kit.

Note 2: A Right to Use (RTU) license is required to operate the MCU NT2H35KA with TL1. This is a one-time license that can be purchased through NT2H98AA.

Note 3: An exhaust fan is mandatory for the DV-45 shelf when equipped with DV-MPEG encoders; one fan per shelf is required. The DV-MPEG units have been tested with fans from Comair-Rotron (-48 V DC, Model TO3MD, Part number 031966). This configuration provides 300 cubic feet per minute (cfm) of air displacement. A filter tray is required to be installed with the exhaust fan to prevent dust from accumulating on the circuit packs (Comair, Model T03MD, Part number 031966).


6-2 Ordering information

Note 4: The DV-45 shelf (NT2H50AA) can accomodate a maximum of five DV-MPEG encoders because of load current limitations (the fuse of the shelf is 7.5 A). The new shelf version (NT2H50AC) has a maximum capacity of eight DV-MPEG video plug-ins (the fuse of the shelf is 15 A). In all cases, blank filler cards (NT2H39AA [single], NT2H39BA [double]) must be used in the remaining slots to maintain EMI shielding integrity.

Note 5: In a Central Office environment, a one-shelf configuration is to be equipped with the following accessories:

— a heat deflector at the top of the shelf

— a fan at the bottom with a filter below the fan

— a heat deflector below the fan filter

Other configurations are possible. Consult the Sales Engineering or the Sales Representative in your area for details.

Cabling guidelinesThe following interface connections use RG59B/U 75 ohms coaxial cables (or equivalent) equipped with BNC connectors:

• Video

• DS3

The following interface connections on the screw terminal use 1RPVC 24 AWG balanced 600 ohms shielded audio cable:

• Audio (analog and digital)

• serial inputs or outputs (data and clock)

Order Belden 8281 broadcast video coaxial cable for all video input and output signals. Order two BNC connectors for each video connection.

See Digital Video Codec DV-45 Ordering Information, 323-1401-151, within the DV-45 Reference Manual, PEC NT2H7902, for more cabling details.



Use of poor quality cables can result in radio-frequency emission readings exceeding regulatory or corporate standards. Always use the best quality cables available for your applications. Also note that MPEG coding provides good compression factors. However, because of this, it is more susceptible to noise in the source signal. The best encoding results are obtained from sources carried on clean connections. If the connection introduces noise, it is encoded and causes degradation with varying degrees of visibility (from invisible to visible). The quality of the source is also a contributor to overall decoded quality.

In descending order:

• 4:2:2 recordings (for example, D1 tape)

• broadcast VTRs (for example, BETACAM) which can be converted to 4:2:2

• laser disc sources, high-resolution VCR tape (for example, 8-5 VHS)

• standard VCR tape



Table 6-1 DV-MPEG unit equipping guidelines

DV-MPEG Equipping

Rule #

Rule Description Ordering Codes

PEC CPC CLEI

1 DV-MPEG Model 100 encoder: order the number required for your configuration

NT2H10AA A0651271 vocdjt0aaa

2 DV-MPEG Model 200 encoder: order the number required for your configuration

NT2H10AB A0651272 vocdjt0aaa

3 DV-MPEG Model 100 decoder: order the number required for your configuration

NT2H11AA A0651273 vocdas0aaa

4 DV-MPEG Model 200 decoder: order the number required for your configuration

NT2H11BA A0671970

5 DV-323 Mux /IMux module: order the number required for your configuration

NT2H29AA A0651274 vocdkn0aaa

6 Order one DV-MPEG unit of each type used in the system as a spare

7 MCU EPROM upgrade kit: order one upgrade kit for existing DV-45 MCUs (NT2H35JA or earlier) that have to handle DV-MPEG units

NT2H99KA A0670546

8 DV-45 MCU: order one MCU for each new DV-45 shelf equipped with DV-MPEG units

NT2H35KA A0670544

9 DV-45 shelf: order one DV-45 shelf to house any mixture of MPEG coder, decorder, or 323 Mux/IMux units according to your configuration, up to a maximum of eight per DV-45 shelf (alternatively, up to four bidirectional codecs)

A DV-45 shelf can be mounted in 483.0 mm (19 in.) or 584.0 mm (23 in.) bays, adjustable mounting brackets are provided with the shelf. A maximum of four DV-45 shelves can be mounted in a 7-ft. bay

NT2H50AC A0664752

10 Heat deflector: order a heat deflector for each new and existing DV-45 shelf equipped with DV- MPEG units (to be mounted above each DV-45 shelf)

NT2H51BA A0362955

11 Exhaust fan: order an exhaust fan for each new and existing DV-45 shelf equipped with DV- MPEG Model 200 encoders (to be mounted above each DV-45 shelf) with heat deflector

NT7H38AC A0402613

—continued—



12 Double blank information cards: order as required to fill empty DV-45 shelf positions (required for proper EMI shielding)

NT2H39AA A0349016 vopq2701aa

13 DV-45 Reference Manual : order one manual for each location that uses DV-MPEG units

NT2H79AA A0350651

14 DV-45 TL1 addendum: order one addendum package for each location that uses DV-MPEG units with the DV-45 TL1 alarm interface

NT2H7914 A0659863

15 Order additional copies of the DV-45 DV-MPEG Cards Reference Manual, 323-1401-381, as required

NT2H7916 A0666697

16 RG-59 B/U coaxial cable: order as required for your configuration (see Table 5-2)

NT7E42Ax Not stockedby Nortel

17 Beldon 8281 broadcast video cable (75 Ω): order as required for your configuration

R0114352 R0114352

18 Shielded audio cable IRPVC 24 AWG (red/yellow) (600 Ω balanced): order as required for your configuration

R0061518 R0061518

19 BNC connectors for RG-59 B/U cable: order as required for your configuration

CX01PS009

A0619904

20 BNC 75 Ω termination plugs: order as required for your configuration

CX01TP500275

A0367547

21 BNC right angle adapters: order as required for your configuration

CX01APJ75RT

A0361070

Note:See Digital Video Codec DV-45 Ordering Information, 323-1401-151, within the DV-45 Reference Manual, PEC NT2H7902, for more cabling details.

—end—

Table 6-1 (continued)DV-MPEG unit equipping guidelines

DV-MPEG Equipping

Rule #

Rule Description Ordering Codes

PEC CPC CLEI



Table 6-2DS3 cable ordering codes

Cable description PEC CPC

BNC connector for 734A Coaxial Cable CX01PS007 A060865

DS3 734A Coaxial Cable (BNC) 5 m (16 ft.) NT7E43AA A0351121

DS3 734A Coaxial Cable (BNC) 10 m (33 ft.) NT7E43AB A0370975

DS3 734A Coaxial Cable (BNC) 20 m (66 ft.) NT7E43AC A0370976

DS3 734A Coaxial Cable (BNC) 30 m (98 ft.) NT7E43AD A0370977

DS3 734A Coaxial Cable (BNC) 40 m (131 ft.) NT7E43AE A0370978

DS3 734A Coaxial Cable (BNC) 50 m (164 ft.) NT7E43AF A0370979

DS3 734A Coaxial Cable (BNC) 60 m (197 ft.) NT7E43AG A0370980

DS3 734A Coaxial Cable (BNC) 75 m (246 ft.) NT7E43AH A0370981

DS3 734A Coaxial Cable (BNC) 80m (262 ft.) NT7E43AJ A0373188

DS3 734A Coaxial Cable (BNC) 140 m (459 ft.) NT7E43AK A0373189

DS3 734A Coaxial Cable (BNC) 100 m (328 ft.) NT7E43AL A0375153

BNC connector for 735A Coaxial Cable CX01PS008 A060866

DS3 735A Coaxial Cable (BNC) 5 m (16 ft.) NT7E43BA A0408003

DS3 735A Coaxial Cable (BNC) 10 m (33 ft.) NT7E43BB A0408004

DS3 735A Coaxial Cable (BNC) 20 m (66 ft.) NT7E43BC A0408005

DS3 735A Coaxial Cable (BNC) 30 m (98 ft.) NT7E43BD A0408006

DS3 735A Coaxial Cable (BNC) 40 m (131 ft.) NT7E43BE A0408007

DS3 735A Coaxial Cable (BNC) 50 m (164 ft.) NT7E43BF A0408008

DS3 735A Coaxial Cable (BNC) 60 m (197 ft.) NT7E43BG A0408009

DS3 735A Coaxial Cable (BNC) 75 m (246 ft.) NT7E43BH A0408010

BNC connector for RG59 Coaxial Cable CX01PS009 A0619904

DS3 RG-59B/U Coaxial Cable (BNC) 5 m (16 ft.) NT7E42AA A0364731

DS3 RG-59B/U Coaxial Cable (BNC) 10 m (33 ft.) NT7E42AB A0365949

DS3 RG-59B/U Coaxial Cable (BNC) 20 m (66 ft.) NT7E42AC A0365950

DS3 RG-59B/U Coaxial Cable (BNC) 30 m (98 ft.) NT7E42AD A0365951

DS3 RG-59B/U Coaxial Cable (BNC) 40 m (131 ft.) NT7E42AE A0365952

DS3 RG-59B/U Coaxial Cable (BNC) 50 m (164 ft.) NT7E42AF A0365953

DS3 RG-59B/U Coaxial Cable (BNC) 60 m (197 ft.) NT7E42AG A0365954

DS3 RG-59B/U Coaxial Cable (BNC) 75 m (246 ft.) NT7E42AH A0365955


7-1

Technical specifications 7-This chapter lists the technical specifications directly related to DV-MPEG cards. For other DV-45 technical specifications, see Technical Specifications, 323-1401-180, in the DV-45 Reference Manual, PEC NT2H7902.

DV-MPEG encodersTable 7-1 summarizes the technical specifications for the DV-MPEG Model 100 and Model 200 encoders. Figure 7-1 shows the location of the interface ports on the DV-MPEG Model 100 encoder card.

Table 7-1 DV-MPEG encoder technical specifications

Parameter Specification/Connector type

Video Input Interfaces: • Composite

• Digital component

• NTSC, [RS170A], PAL - BNC, 75 Ω• D1 serial - BNC, 75 Ω (Model 200)

Audio Input Interfaces: • Balanced

• Digital

• Left and Right or two Mono, 20-19500 Hz,8 dBm or 18 dBm (balanced), screw-type, 600 Ω

• AES/EBU serial (balanced) (Model 200 only), screw-type, 44.1 kHz/48 kHz

Trunk Interfaces: • DS3 in

• DS3 out

• Serial out

• Contains partially filled DS2 slots to which the encoder adds the bitstream as N x DS2, limited by N = 3 or the number of DS2 slots available — BNC

• Returns partially (or completely) filled DS3 to which the encoder has added the bitstream as N x DS2 — BNC

• Data out (screw-type)

• Clock out (screw-type)

• Clock in (screw-type)

—continued—


7-2 Technical specifications

Processing Techniques: • System Multiplex

• Model 100 Video Stream

• Model 200 Video Stream

• Audio Stream

• Data Streams

• Output stream bit-rates: N x DS2 (6.312 Mb/s to 18.936 Mb/s), where N = 1, 2, 3 using the Transport Stream syntax

• Encoding using Main Level (ML) syntax

• Operating modes for I-Frame processing in both full (720 x 480 pixels) or half- (352 x 480 pixels) horizontal resolution

• Bit-rates: video stream to fit into N x DS2, including audio and data streams

• Closed caption text: extracted from video signal, stamped and inserted back at the decoder

• Encoding using Main Profile (MP) and Main Level (ML) syntax

• Operating modes for IPB processing in both full or half- horizontal resolution (720 x 480 pixels)

• Bit-rates: video stream to fit into N x DS2, including audio and data streams

• Closed Caption text: extracted from video signal, stamped and inserted back at the decoder

• Encoding using MPEG-1 Layer 2 (MUSICAM format)

• Modes: stereo, joint-stereo, mono, dual channel

• Operating at 44.1 kHz allowing compatibility with DVTR, CD players, and other playback equipment, and 48 kHz for DAT tape

• Used to carry Closed Caption Text

Table 7-1 (continued)DV-MPEG encoder technical specifications

Parameter Specification/Connector type



Figure 7-1DV-MPEG encoder input/output ports

FW-3432

A- NTSC composite IN

S2 - Audio IN, right

S4 - AES/EBU Audio IN (Model 200)

S8 - Serial CLK OUT

S6 -

S1 - Audio IN, left

S5 - Serial Data OUT

S7 - Serial CLK IN

BNC group

S3 -

BNC group

Screw group

B - D1 Video IN (Model 200)

C- DS3 OUT

D - DS3 IN

A

Backplaneconnectors

B

C

D

s2s1s4s3s6s5s8s7

+-G

+-G

+-G

+-G

+-G

+-G

+-G

+-G

Faceplatewith LEDs

DV-MPEG CoderModel 100 or 200

circuit pack

Screw group



DV-MPEG decodersTable 7-2 summarizes the technical specifications for a DV-MPEG Model 100 and Model 200 decoders. Figure 7-2 shows the location of the interface ports on a DV-MPEG decoder card.

Table 7-2DV-MPEG decoder technical specifications

Parameter Specification

Video Output Interfaces: • Composite

• Digital component

• NTSC, [RS170A], PAL - BNC, 75 Ω• D1 serial - BNC, 75 Ω (Model 200)

Audio Output Interfaces: • Balanced

• Digital

• Left and Right or two Mono, 20-19500 Hz, 8 dBm or 18 dBm p-p (±ground), screw-type, 600 Ω

• AES/EBU serial (±ground), screw-type, 44.1 kHz/48 kHz (Model 200 only)

Trunk Interfaces: • DS3 in

• DS3 out

• Serial input

• Contains partially filled DS3 from which the decoder extracts the bitstream as N x DS2 stream, limited to N = 3 — on BNC

• Returns a partially filled (or empty) DS3 from which the decoder has extracted the bitstream as N x DS2

• Data in (screw-type) on BNC

• Clock in (screw-type)

Processing Techniques: • System Multiplex

• Video Stream

• Audio Stream

• Audio Performance

• Data Streams

• Output stream bit-rates: N x DS2 (6.28 Mb/s to 18.84 Mb/s), where N = 1, 2, 3 using the Program Stream syntax

• Decoding using Main Profile (MP) and Main Level (ML) syntax

• Operating modes for I-, IP-, or IPB-frame processing in both full or half horizontal resolution (720 x 480 pixels)

• Closed Caption text: inserted back into the video signal

• Decoding using MPEG-1 Layer 2 (MUSICAM format)

• Operating at 44.1 kHz allowing compatibility with DVTR, CD players, and other playback equipment, and 48 kHz for DAT tape

• Signal-to-noise Ratio: better than 70 dB

• Used to carry Closed Caption Text



Figure 7-2DV-MPEG decoder input/output ports

FW-3439

A- Composite OUT

S2 - Audio OUT, right

S4 -

S8 - Serial CLK IN

S6 -

S1 - Audio OUT, left

S5 -

AES/EBU S3 - Audio Out (Model 200)

S7 - Serial Data IN

BNC group

Screw group

B - D1 Video OUT (Model 200)

C- DS3 IN

D - DS3 OUT

A

Backplaneconnectors

B

C

D

s2s1s4s3s6s5s8s7

+-G

+-G

+-G

+-G

+-G

+-G

+-G

+-G

Faceplate with LEDs

DV-MPEG DecoderModel 100 or 200

circuit pack

Screw group

BNC group



DV-323 Mux/IMux unitTable 7-2 summarizes the technical specifications for a DV-323 Mux/IMux unit. Figure 7-3 shows the location of the interface ports on a DV-323 Mux/IMux unit. Note that depending on the function of the DV-323, the connectors IN/OUT change.

Table 7-3DV-323 Mux/IMux unit technical specifications


Mux Signal Interfaces: • In signals

• Out signal

• Up to a maximum of three DS3 inputs on the BNC connectors (75 Ω); each input carries streams organized in groups of N x DS2 slots (N = 1, 2, or 3)

• One DS3 output on the BNC connector (75 Ω) consisting of the selected signals in the input with DS2 slots reassigned

IMux Signal Interfaces: • In signal

• Out signals

• One DS3 input on the BNC connector (75 Ω) containing up to three DS3 signals organized in groups of N x DS2 (N = 1, 2, or 3) in contiguous slots

• Up to a maximum of three DS3 outputs on the BNC connectors (75 Ω); each output consists of a DS3 signal with each stream placed in N x DS2 slots (N = 1, 2, or 3). The first slot is always in slot 0.



Figure 7-3DV-323 Mux/IMux unit input/output ports

FW-3547

BNC Group

A1

Backplaneconnectors

B1

C1

D1

s5s1s6s2s7s3s8s4

Faceplate

Screw Group

A1 - DS3 A-inputB1 - DS3 B-inputC1 - DS3 C-inputD1 - DS3 out

A1 - DS3 inB1 - DS3 B-outputC1 - DS3 C-outputD1 - DS3 D-output

MUX IMUXConnector designation



Regulatory, Safety, Environmental, and Mechanical Table 7-4 summarizes the regulatory, safety, environmental, and mechanical specifications for the DV-MPEG product line.

Table 7-4Regulatory, Safety, Environmental, and Mechanical specifications for DV-MPEGcircuit packs


Electromagnetic Radiation and Conduction

• FCC Part 15 subpart J for Class A systems

• Bellcore 1089-CORE (Class A)

• Bell Canada DS 8465 (Class A)

EMI Immunity - Radiation and Conduction

• Bellcore 41089-CORE (Class A)

• Bell Canada DS 8465 (Class A)

Safety Compliance • UL 1950

• CSA C22.2, IEC 950

Material Flammability • Bellcore NEBS TR-NWT-000063

Environmental • Temperature: operating +0°C to +40°C, storage and shipping -55°C to +75°C

• Relative humidity (complies with IEC 68-2-3): operating 5-95% non-condensing, storage and shipping 10-95% non-condensing

Power Requirements • Derives power from the -48 V dc

Mechanical • Occupies a single double slot in a DV-45 shelf

• Operational and transport vibrations according to TR-EOP-000063 for Zone 4 earthquake loading

• Bounce according to IEC 68-2-55

• Handling and installation drops comply with IEC 68-2-31, Test EC drop test

• Impact shock according to IEC 68-2-27

• Temperature shock according to IEC 68-2-27

• Temperature shock according to IEC 68-2-14

• Meets crush, plug and jack retention, modules access and hot insertion tests



Access and trunk portsTable 7-5 summarizes the access and trunk port specifications for DV-MPEG circuit packs.

Table 7-5 Access and trunk port specifications for DV-MPEG circuit packs

Unit I/O port type Bit-rate/ frequency

No. of ports

Connector type

DV-MPEG Model 100 Encoder

[SERVICE] Analog IN[SERVICE] Analog IN[ACCESS] Digital IN[ACCESS] Digital OUT[ACCESS] Digital IN[ACCESS] Digital OUT[ACCESS] Digital OUT

Video: 4.2 MHzAudio: 20-20 kHzDS3DS3RS-422 CLKRS-422 CLKRS-422 DAT

1211111

BNC - coax (75 Ω)Screw-type (600 Ω)BNC - coax (75 Ω)BNC - coax (75 Ω)Screw-type (100 Ω)Screw-type (100 Ω)Screw-type (100 Ω)

DV-MPEG Model 200 Encoder

[SERVICE] Analog IN[SERVICE] Digital IN[SERVICE] Analog IN[SERVICE] Digital IN[ACCESS] Digital IN[ACCESS] Digital OUT[ACCESS] Digital IN[ACCESS] Digital OUT[ACCESS] Digital OUT

Video: 4.2 MHzVideo: 270 Mb/sAudio: 20-20 kHzAudio DigitalDS3DS3RS-422 CLKRS-422 CLKRS-422 DAT

12211111

BNC - coax (75 Ω)BNC - coax (75 Ω)Screw-type (600 Ω)Screw-type (110 Ω)BNC - coax (75 Ω)BNC - coax (75 Ω)Screw-type (100 Ω)Screw-type (100 Ω)Screw-type (100 Ω)

DV-MPEG Model 100 Decoder

[SERVICE] Analog OUT[SERVICE] Analog OUT[ACCESS] Digital IN[ACCESS] Digital OUT[ACCESS] Digital IN[ACCESS] Digital OUT

Video: 4.2 MHzAudio: 20-20 kHzDS3DS3RS-422 CLKRS-422 DAT

121111

BNC - coax (75 Ω)Screw-type (600 Ω)BNC - coax (75 Ω)BNC - coax (75 Ω)Screw-type (100 Ω)Screw-type (100 Ω)

DV-MPEG Model 200 Decoder

[SERVICE] Analog OUT[SERVICE] Digital OUT[SERVICE] Analog OUT[SERVICE] Digital OUT[ACCESS] Digital IN[ACCESS] Digital OUT[ACCESS] Digital IN[ACCESS] Digital OUT

Video: 4.2 MHzVideo: 270 Mb/sAudio: 20-20 kHzAudio DigitalDS3DS3RS-422 CLKRS-422 DAT

11221111

BNC - coax (75 Ω)BNC - coax (75 Ω)Screw-type (600 Ω)Screw-type (110 Ω)BNC - coax (75 Ω)BNC - coax (75 Ω)Screw-type (100 Ω)Screw-type (100 Ω)

DV-323 Mux/IMux module:

Mux function [ACCESS] Digital IN[ACCESS] Digital OUT

DS3DS3

31

BNC - coax (75 Ω)BNC - coax (75 Ω)

IMux function [ACCESS] Digital IN[ACCESS] Digital OUT

DS3DS3

13

BNC - coax (75 Ω)BNC - coax (75 Ω)

DV-45 shelf [ACCESS] Analog IN Sync with burst 1 BNC - coax (75 Ω)



Video performance specificationsTable 7-6 summarizes the video specifications (active lines) for DV-MPEG circuit packs. The NTSC input is RS-170A compliant.

Table 7-6 Video performance specifications (active lines) for DV-MPEG circuit packs

Specification Test Pattern Maximum Typical

Bar Amplitude NTC7 composite 100 ± 1 IRE 100 ± 0.4 IRE

SCH to Horizontal Blanking Phase NTC7 composite ± 5° ± 0.2°

H-sync Jitter NTC7 composite 10 nsec 3 nsec

H-sync Long Time Jitter NTC7 composite None 5 nsec

Frequency Response Multiburst (100 IRE) ± 0.40 dB See Note 1

Chrominance-Luminance Gain inequality NTC7 composite ± 2 IRE -0.9 IRE(See Note 2)

Chrominance-Luminance Delay inequality NTC7 composite ± 20 nsec -18.1 ns(See Note 2)

Short time waveform distortion NTC7 composite 4 % 2.8 %

Line time waveform distortion NTC7 composite ± 0.5% ± 0.3 %

Field time waveform distortion Field square wave (white)

± 3 % ± 0.6 %

Long time waveform distortion Black signal (Bounce)

Maximum 8 IRE peak overshoot of video signal measured at blanking level.

Settles to < 3 IRE within 3 sec.

Settles to within 3 IRE within 0 sec.

Differential gain NTC7 composite 2 % p-p 1.56 % p-p

Differential phase NTC7 composite ± 1° p-p ± 0.89° p-p

Luminance non-linearity NTC7 composite 3 % p-p 4.3 %(See Note 3)

Chrominance Non Linear Gain NTC7 combination ± 6% ± 4.7 %

Chrominance Non Linear Phase Distortion NTC7 combination ± 1.3° +0.3 ° to -0.2°

Chrominance-Luminance intermodulation NTC7 combination ± 1% ± 0.2 %

Dynamic Gain Distortion Black with bounce 2 % 1.5%

SNR (Signal to Noise Ratio) Luminance Ramp > 49 dB >52 dB

Burst Frequency Error NTC7 composite 10.0 Hz 0.4 Hz



Note 1: The frequency response is affected by the DV-MPEG demodulation technique used, by the quantization operations of the A/D converters, and by the coding method (DCT coding). Excluding the zone near the 3.58 MHz, the spectrum will be mostly affected by the A/D conversion and the coding technique. The zone near the 3.58 MHz carrier is affected by the demodulation technique which, in this case, uses a notch filter. This only affects the luminance spectrum since the test pattern uses the “Multiburst test signal.” It is expected therefore to see the spectrum display a rejection band around 3.58 MHz. This behaviour is only observed when using the analog input. Using the digital serial input, for Y:Cr:Cb, avoids demodulation by the on-board demodulator. Then, if the signal is purely digital, the spectrum displayed should be flat. If an external NTSC/PAL to Y:Cr:Cb unit is used, the spectrum displayed will show the frequency response of the external unit.Note 2: This effect is caused by the current use of a notch filter for NTSC demodulation at the encoder. Residual energy causes the instruments to lock on to one phase or another and make measurements based on this information. This does not affect the overall performance.

Note 3: Luminance value conversions from NTSC to D1 suffer from the fact that in this NTSC configuration, there is a 7.5 IRE setup. This means that a test signal which has no setup has values below 7.5 IRE clipped to the minimum value. This value is then reproduced at the decoder and erroneous measurements result.

Table 7-6 (continued)Video performance specifications (active lines) for DV-MPEG circuit packs

Specification Test Pattern Maximum Typical



Audio performance specificationsTable 7-7 summarizes the consumer (8 dBm) and professional (18 dBm) audio performance specifications for DV-MPEG circuit packs.

Digital audio synchronizationThe digital audio interface will function properly only when used with the digital video input (D1), and with the audio data stream frequency locked to the video stream. In other cases, slips will occur in the audio which result in THD+N bursts.

Table 7-7Consumer and professional audio performance specifications for DV-MPEG circuit packs

Audio Parameter Requirement

Consumer +8.0 dBm

(maximum)

Consumer Typical

Professional +18.0 dBm (maximum)

Professional Typical

Insertion Gain @ 1000 Hz ± 0.50 dB 0.45 dB ± 0.50 dB 0.45 dB

Maximum input level +8.0 dBm +8.5 dBm +18.0 dBm +18.5 dBm

Frequency response(1000 Hz reference)

20 Hz - 100 Hz

100 Hz - 18 kHz

18 kH z - 20 kHz

- 3.0/+0.5 dB

± 0.5 dB

- 3.0/+0.5 dB

±0.5 dB within range

- 1.0/+0.5 dB

± 0.5 dB

- 1.0/+0.5 dB

±0.5 dB within range

Gain difference of channels

40 Hz

1 kHz

20 kHz

0.75 dB

0.3dB

1.0 dB

0.11 dB

0.03 dB

0.05 dB

0.75 dB

0.3dB

1.0 dB

0.07 dB

0.004 dB

0.001 dB

Phase difference of channels

40 Hz

1 kHz

20 kHz

3.0 °0.2 °0.2 °

1.7 °0.02 °0.05 °

3.0 °0.2 °0.2 °

2.2 °0.06 °0.05 °

THD+N with 80 kHz filter

< 0.5% 0.3 % < 0.5% 0.3 %

Crosstalk < -70 dB -70.5 dB < -70 dB -70.5 dB

Idle channel noisewith 80 kHz filter

< -55 dBm -55 dBm < -55 dBm -55 dBm



D1 interface specifications (Model 200 only)Table 7-8 summarizes the serial D1 interface specifications for DV-MPEG circuit packs.

Table 7-8D1 interface specifications for DV-MPEG circuit packs

D1 interface parameterITU-R Rec.

601/656DV-MPEGmeasured

Bit rate 270 Mb/s 270 Mb/s

Channel coding NRZIScrambled

NRZIScrambled

Impedance 75 Ω 75 Ω

Return loss >15 dB5 to 270 MHz

>15 dB5 to 270 MHz

Stream coding 8 or 10-bitwords

8 or 10-bitwords

Signal amplitude 800mV ± 10% 800mV ± 10%

DC offset with reference to signal mid amplitude point

± 0.5V ± 0.5V


8-1

Observing safety guidelines 8-This chapter describes the precautions that should be observed for the following:

• handling and working with DV-45 shelves

• handling, storing, installing, and replacing DV-45 circuit packs

DV-45 shelfThe following precaution must be taken when handling and working with a DV-45 shelf (this includes external cabinets, DV-45 shelves mounted inside the cabinets, and DV-45 circuit packs mounted in DV-45 shelves).

Wear a skin-contact antistatic bracelet when handling and working with a DV-45 shelf. This bracelet consists of an expandable wrist strap and grounding cord; its function is to rapidly dissipate charges to ground. Alternative personnel ground methods can be used; for example, conductive carpeting, conductive shoes, or heel grounding assemblies. An electrostatic discharge jack is located on the front of all heat deflectors.

DV-45 circuit packs Damage to DV-45 circuit packs, particularly those that are sensitive to static electricity, may occur at any time. DV-45 circuit packs that are sensitive to static electricity are shipped in antistatic shipping bags and are marked with the following symbol.

Note: All DV-45 circuit packs must be installed or extracted by using the unit latches to ensure a secure mating with the backplane.

CAUTIONElectrostatic-sensitive devicesAvoid touching any components on the printed circuit board. Electrostatic-sensitive devices can be damaged by electrostatic discharge. Always ground yourself before handling a board.


8-2 Observing safety guidelines

Handling circuit packsThe following precautions must be taken when handling DV-MPEG/323 circuit packs:

• Wear a skin-contact antistatic bracelet when handling all circuit packs that are sensitive to static electricity. This bracelet consists of an expandable wrist strap and grounding cord; its function is to dissipate charges to ground.

• At all times, handle the circuit packs by the faceplate or stiffener.

• Do not touch the solder side, pin connector, or components.

• Do not stack circuit packs on top of, or against each other.

• Do not force circuit packs into the packaging material.

• Ensure that the transmit and receive optical connectors of optical circuit packs are protected by dust caps at all times.

Note: Alternative personnel grounding methods can be used; for example, conductive carpet, conductive shoes, or heel grounding assemblies.

Storing circuit packsSpare circuit packs must be left in the original shipping container until required.

To prevent damage to DV-MPEG/323 circuit packs while they are in storage, necessary precautions must be observed, to avoid:

• accumulation of dirt or dust on the gold-plated contact

• defacing of printed wiring areas

• board warpage if stored in an area of high humidity and temperature.

Installing or replacing circuit packsTo prevent electrostatic damage, the following conditions apply during the installation or replacement of DV-MPEG/323 circuit packs that are sensitive to static electricity:

• all circuit packs must be enclosed in static shielding bags for transportation

• upon reaching the trouble location, maintenance personnel must attach a antistatic bracelet before removing circuit packs

• suspect circuit packs must be removed and immediately placed in a static shielding bag

• all safety precautions listed under “Handling circuit packs” should be followed during installation and replacement of circuit packs

Whenever possible use the original static shielding bag, padding, and box in which the DV-MPEG/323 circuit packs was received. If the original material is lost, use other suitable packing.


Observing safety guidelines 8-3

Radio-frequency emissionsThe following regulatory notice applies to all Nortel SONET transmission products.

This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.

This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, can cause harmful interference to radio communications. Operation of this equipment in a residential area can cause harmful interference, in which case users will be required to correct the interference at their own expense.


8-4 Observing safety guidelines


9-1

Setting up and installing DV-MPEG circuit packs 9-

This chapter provides procedures for installing DV-MPEG circuit packs and setting circuit pack options. Refer to the Digital Video Codec DV-45 Installation NTP, 323-1401-201, within the DV-45 Reference Manual, PEC NT2H7902, for instructions on installing other DV-45 equipment.

The first eight positions in the DV-45 shelf can be equipped with either a video coder or decoder circuit pack. Each slot provides the same video, audio and DS3 connections at the rear of the shelf. Coder circuit packs have audio and video inputs, and a DS3 output. For decoder circuit packs, the same connectors become audio and video outputs, and DS3 inputs.

To provide a bidirectional codec pair, one coder and one decoder are placed in adjacent positions. The bidirectional pair permits the use of a video loopback feature. Equip the slots labeled Coder/Decoder with a coder circuit pack. The associated slots labeled Decoder/Coder take a decoder circuit pack.

A DV-MPEG circuit pack is part of the DV-45 system and is installed with other DV-45 equipment according to application requirements. This chapter only provides the procedures directly related to installing a DV-MPEG circuit pack and setting the available options. For specific connections to other equipment and the required option settings, refer to the application-specific documentation (for example, the System Documentation for the Digital Video Network (DVN) application or Option Settings for S/DMS TransportNode equipment).


9-2 Setting up and installing DV-MPEG circuit packs

RequirementsThe procedures in this chapter assume that:

• all DV-45 shelves and heat deflectors have been installed

• when installing DV-MPEG Model 200 encoders, an exhaust fan (NT7H38AC or equivalent) with a filter tray have been installed at the top of the DV-45 shelf to pull air from out of the shelf card cage (see “Installing a fan shelf cooling unit” on page 9-30)

• the dc-power to all DV-45 shelves has been connected

• all DV-45 equipment DS3 connections have been made

• all cables are installed according to recommended practices

Chapter task list

Task Page

Setting DV-MPEG encoder options 9-3

Setting DV-MPEG decoder options 9-10

Setting DV-323 Mux/IMux options 9-14

Installing DV-MPEG circuit packs in a DV-45 shelf 9-18

Upgrading DV-45 MCU firmware 9-21

Connecting DV-MPEG encoders to DS3 carrier facilities 9-24

Connecting DV-MPEG decoders to DS3 carrier facilities 9-26

Connecting a DV-323 Mux/IMux to DS3 carrier facilities 9-28

Installing a fan shelf cooling unit 9-30



Procedure 9-1Setting DV-MPEG encoder options

Use this procedure to set up a DV-MPEG Model 100 or Model 200 encoder prior to installing it in a DV-45 shelf. This procedure details the available options; for specific settings, refer to the application-specific documentation (for example, the System Documentation for the DVN application).

The encoder can transmit MPEG data on one to three DS2 groups. DIP switches select the first DS2 group to use, and the total number of consecutive DS2 groups to use. The DS2 groups used must be consecutive, and cannot wrap around from channel 7 to 1. If the starting DS2 group and the number of DS2 groups selected is greater than seven, then the number of DS2 groups is reduced to avoid wrap around.

A DIP switch also selects Terminal or Repeater mode. In Terminal mode, the encoder does not receive a DS3 in, but does generate a DS3 out using its local oscillator clock. In Repeater mode, the encoder derives its clock from the incoming DS3. The unused DS2 groups from the input DS3 are passed through unchanged to the output DS3.

Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 8-1 for important information on how to handle DV-45 circuit packs.

Tools Antistatic bracelet

Action

Step Action

1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 8-1. Attach the antistatic bracelet and ground it.

2 Remove the DV-MPEG encoder from the shipping carton and the static protection bag.

3 See Figure 9-1 to locate the DIP switches and jumpers on the encoder unit.

4 Refer to Table 9-1 through Table 9-5, and set the encoder DIP switches and jumpers as required for your configuration. See Table 9-7 and Table 9-6 for default settings.

5 See “Installing DV-MPEG circuit packs in a DV-45 shelf” on page 9-18 for instructions on inserting DV-MPEG cards into a DV-45 shelf.

—end—



Figure 9-1DV-MPEG Model 100 and Model 200 encoder unit showing location of DIP switches and jumpers

FW-3548

Table 9-1 SW1 DIP switch definitions for DV-MPEG encoder motherboards

Switch Setting Definition

SW1 In DS3 Attenuation Enabled

SW1 Out DS3 Attenuation Disabled

DS3 STATUS

DS3 DEGRADED

DS3 FAILED

DS3 AIS DETECTED

VIDEO STATUS

INPUT CLOCK LOSS

LOOPBACK

BLACK ACTIVE

UNITON

FAIL

SW

1

DS

3 O

UT

LBO

OU

TLB

OIN

DV-MPEG DECODERMODEL 100

SW2

OPEN

CLOSED

OPEN

CLOSEDSW3

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

8642 J13

J15

7531

8642

7531

BA

R C

OD

EO

LEI C

OD

ER

EL

not equippedon model 100

not equippedon model 100

MPEG Encoder

daughterboard switch (U25)

87654321

ON

OFF



Table 9-2 SW2 DIP switch definitions for DV-MPEG encoder motherboards


3, 2, 1 First DS2 for MPEG data:

SW2-3,2,1 CL, CL, CL

CL, CL, OP

CL, OP, CL

CL, OP, OP

OP, CL, CL

OP, CL, OP

OP, OP, CL

OP, OP, OP

N/A (loss of signal LED will flash)

DS2 Ch# 1 first channel to use







5, 4 Number of DS2s for MPEG data:

SW2-5,4 CL, CL

CL, OP

OP, CL

OP, OP

N/A

One DS2

Two DS2s

Three DS2s

6 Horizontal Resolution

SW2-6 CL

OP

Full horizontal resolution mode (720 x 480)

Half horizontal resolution mode (352 x 480)

7 Default Settings:

SW2-7 CL

OP

From DIP switches

From EPROM

8 Mode:

SW2-8 CL

OP

Repeater mode (Use the DS3-in)

Terminal mode (No DS3-in)



Table 9-3SW3 DIP switch definitions for DV-MPEG encoder motherboards


Audio sample rate choice:

SW3-1 CL

OP

48 kHz

44.1 kHz

Video format choice:

SW3-2 CL

OP

NTSC

PAL

MPEG clock source choice:

SW3-3 CL

OP

DS2 clock

External RS-422 clock

Reset:

SW3-4 OP

CL

Reset Disable

Reset Enable

SW3-5 Reserved

Color Bar Test Pattern choice:

SW3-6 CL

OP

Disabled (normal operation)

Enabled

Video source choice:

SW3-7 CL

OP

Composite (PAL,NTSC)

Digital D1

Audio source choice:

SW3-8 CL

OP

Analog

Digital



Table 9-4DIP switch definitions (U25) for DV-MPEG encoder daughterboards

The encoder daughterboard has an eight position DIP switch to control local functions. If the mode selected on the motherboard DIP switches differs from those selected on the daughterboard, the motherboard setting prevails.


8, 7 Video input choice:

SW-8, SW-7 On, On

Off, On

On, Off

Off, Off

D1

Color Bar Test Pattern

Composite Video

Reserved (Future S-VHS)

6 Audio input choice:

SW-6 On

Off

Analog Audio

Digital Audio

5 Video format choice:

SW-5 On

Off

NTSC Video Output

PAL Video Output

4, 3 Video mode choice:

SW-4, SW-3 On, On

Off, On

On, Off

Off, Off

I frame only (for Model 100 encoder)

I frame only (for Model 200 encoder)

IP encoding (for Model 200 encoder)

IBP encoding (for Model 200 encoder)

2 ASPI Module Bypass choice:

SW-2 On

Off

Normal operation

Bypass ASPI module (for test only)

1 Diagnostics choice:

SW-1 On

Off

Diagnostics Disabled

Diagnostics Enabled



Table 9-5Jumper definitions for DV-MPEG Model 100 encoder

Jumper Setting Definition

Audio output level choice:

JP13 1-2, 3-4

5-6, 7-8

Right channel:

Audio in level 8 dBm


JP15 1-2, 3-4

5-6, 7-8

Left channel:



Table 9-6Default settings for DV-MPEG encoder daughterboards

The encoder daughterboard has an eight position DIP switch to control local functions. If the mode selected on the motherboard DIP switches differs from those selected on the daughterboard, the motherboard setting prevails.


SW-7, SW-8 Off, On Composite Video Input

SW-6 On Analog Audio Input

SW-5 On NTSC Video Output

SW-3, 4 On, On

Off, Off

All the time for Model 100; for Model 200 only if you want I frame encoding

Only for Model 200 encoder for IBP encoding

SW-2 On Reserved

SW-1 On Diagnostics Disabled, only short diagnostics will be done



Table 9-7 Default settings for DV-MPEG encoder motherboards

Normal operation: I frame for Model 100 encoder, IPB for Model 200 encoder, using DS3 with one DS2, starting at first DS2, Composite Video, Analog Audio for short distances. The following default settings allow the user to set up the unit with a known configuration for the stated parameters.

Switch or Jumper

Setting Definition


SW2-3, 2, 1 On, On, Off DS2 Ch#1 first channel to use

SW2-5, 4 On, Off One DS2 (Clock rate 6.282 MHz)

SW2-6 On Full D1 mode (720 x 480)

SW2-7 On Default settings from DIP switches

SW2-8 Off Terminal mode (no DS3 in)

SW3-1 On 48 kHz

SW3-2 On NTSC

SW3-3 On DS2 clock

SW3-4 On Reserved (but set to this position)

SW3-5 On Reserved (but set to this position)

SW3-6 On Disabled (normal operation)

SW3-7 On Composite (PAL,NTSC)

SW3-8 On Analog

JP13 5-6, 7-8 Right channel audio input level of 18 dBm

JP15 5-6, 7-8 Left channel audio input level of 18 dBm



Procedure 9-2Setting DV-MPEG decoder options

Use this procedure to set up a DV-MPEG Model 100 or Model 200 decoder prior to installing it in a DV-45 shelf. This procedure details the available options; for specific settings, refer to the application-specific documentation (for example, the System Documentation for the DVN application). The MPEG Model 100 or Model 200 decoder will interface with both MPEG Model 100 and MPEG Model 200 encoders.

Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 8-1 for important information on how to handle DV-45 units.


Action

Step Action


2 Remove the DV-MPEG Model 100 decoder from the shipping carton and the static protection bag.

3 See Figure 9-2 to locate the DIP switches and jumpers on the decoder unit.

4 Refer to Table 9-8 through Table 9-11, and set the decoder DIP switches and jumpers as required for your configuration. See Table 9-12 for default settings.

5 See “Installing DV-MPEG circuit packs in a DV-45 shelf” on page 9-18, for instructions on inserting DV-MPEG cards into a DV-45 shelf.

—end—



Figure 9-2DV-MPEG decoder unit showing location of DIP switches and jumpers

FW-3549

DS3 STATUS

DS3 DEGRADED

DS3 FAILED

DS3 AIS DETECTED

VIDEO STATUS

INPUT CLOCK LOSS

LOOPBACK

BLACK ACTIVE

UNITON

FAIL

SW2IN

LBO

OUT

DV-MPEG DECODERMODEL 100

SW3 1

2

3

4

5

6

7

8

SW1 1

2

3

4

5

6

7

8

1

JP22

31

JP32

3

DIS

DIAGENJ29

NO GENLOCK

GENLOCK

J31J30 J28

BA

R C

OD

EO

LEI C

OD

ER

EL

OFF ON



Table 9-8SW1 DIP switch definitions for DV-MPEG decoders


3, 2, 1 First DS2 for MPEG data:

SW1-1,2,3 On, On, On

On, On, Off

On, Off, On

On, Off, Off

Off, On, On

Off, On, Off

Off, Off, On

Off, Off, Off

Invalid

DS2 Ch#1 first channel to use







5, 4 Number of DS2s for MPEG data:

SW1-4,5 On, On

On, Off

Off, On

Off, Off

N/A

Use one DS2 Channel (Clock rate 6.282 MHz)

Use two DS2 Channels (Clock rate 12.565 MHz)

Use three DS2 Channels (Clock rate 18.848 MHz)

6 Video output choice:

SW1-6 On

Off

NTSC Video Output

PAL Video Output

7 MPEG stream choice:

SW1-7 On

Off

MPEG Stream Source from DS3

MPEG Stream Source from RS-422

8 Default settings:

SW1-8 Off

On

Default settings from EEPROM

Default settings from DIP switches









SW3-1 OnOff

ReservedReserved

SW3-2 OnOff

Composite Video outD1 Video out (Composite also present)

SW3-3 OnOff

Freeze the last frame on signal lossBlank video on signal loss

SW3-4 to SW3-8 Reserved

Table 9-11Jumper definitions for DV-MPEG decoders

Jumper Setting Definition

Audio output level choice:

JP2JP3

2-32-3

Install for 8 dBm audio out level

JP2JP3

1-21-2

Install for 18 dBm audio out level

Table 9-12Default settings for DV-MPEG decoders


SW1-3, 2, 1 On, On, Off DS2 Ch#1 first channel to use

SW1-5, 4 On, Off One DS2 channel (Clock rate 6.282 MHz)

SW1-6 On NTSC Video Output

SW1-7 On MPEG Stream Source from DS3

SW1-8 Off Default settings from EEPROM


SW3-1 Reserved

SW3-2 On Composite Video out

SW3-3 to SW3-8 Reserved



Procedure 9-3Setting DV-323 Mux/IMux options

Use this procedure to set up a DV-323 Mux/IMux prior to installing it in a DV-45 shelf. This procedure details the available options; for specific settings, refer to the application-specific documentation (for example, the System Documentation for the DVN application, PEC NT2H65AD).

A DV-323 Mux/IMux complements the DV-MPEG codecs by providing concentration or splitting of DS3 signals from aggregated or individualized DS2 streams. This allows maximum use of broadband transmission resources.

Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 8-1 for important information on how to handle DV-45 units.


Action

Step Action


2 Remove the DV-323 Mux/IMux from the shipping carton and the static protection bag.

3 See Figure 9-3 to locate the DIP switches on the unit.

4 Refer to Figure 9-4 and Figure 9-5, and set the DIP switches as required for your configuration. See “Installing DV-MPEG circuit packs in a DV-45 shelf” on page 9-18, for instructions on inserting DV-MPEG cards into a DV-45 shelf.

Note: All DIP switch selections can be overridden through Transaction Language 1 (TL1) software commands. See FWP02 3.02 Addendum, PEC NT2H7914, for more information on the DV-45 TL1 alarm surveillance interface and TL1 commands.

—end—



Figure 9-3DV-MPEG Mux/IMux showing location of DIP switches and jumpers

FW--3551

DS3 INPUT #1STATUS

DS3 DEGRADED

DS3 FAILED

DS3 DETECTED

DS3 INPUT #3STATUS

DS3 DEGRADED

DS3 FAILED

DS3 DETECTED

MUX ONIMUX OFF

DS3 DEGRADED

DS3 FAILED

DS3 DETECTED

DS3 INPUT #2STATUS

UNITON

FAIL

323 MUX-IMUX

BA

R C

OD

EO

LEI C

OD

ER

EL

S1 S2 S3 S4 S5 S6 S7 S8 S912345678



Figure 9-4DIP switches for DV-323 Mux applications

FW-3527

SW1

12

34

56

78

SW2

12

34

56

78

SW3

12

34

56

78

Output tributary

DS3 input channel

Grp1Grp2Grp3Grp4Grp5Grp6Grp7

SW4

12

34

56

78

SW5

12

34

56

78

SW61

23

45

67

8

DS2 group

SW7

12

34

56

78

SW8

12

34

56

78

SW9

12

34

56

78

Program length

Source configuration

ON ON ON Not usedON ON OFF Ch #1ON OFF ON Ch #2ON OFF OFF Ch #3OFF ON ON Not usedOFF ON OFF Not usedOFF OFF ON Not usedOFF OFF OFF Not used

ON ON ON Not usedON ON OFF Trib #1ON OFF ON Trib #2ON OFF OFF Trib #3OFF ON ON Trib #4OFF ON OFF Trib #5OFF OFF ON Trib #6OFF OFF OFF Trib #7

ON ON ON Not usedON ON OFF Uses 1 DS-2ON OFF ON Uses 2 DS-2ON OFF OFF Uses 3 DS-2OFF ON ON Uses 4 DS-2OFF ON OFF Uses 5 DS-2OFF OFF ON Uses 6 DS-2OFF OFF OFF Uses 7 DS-2

* Each of the 7 output tributaries are set independantly from the others. Settings for the given tributaries are read horizontally, across all 9 switch packs.* A not used setting, will cause the output trib to be set to 0* When length is over 1, the following switches for next trib not read.* In addition,

SW1-8 ON = IMUX application OFF = MUX application

SW2-8 ON = Takes configuration from switches at start-up OFF = Takes configuration from EEPROM(TL1) at start-up

SW4-8 ON = DS3 IN #1 not prov. OFF = DS3 IN #1 not provisioneD

SW7-8 ON = Output in repeater mode (output hit if CH #1 is hit) OFF = Output in terminal mode (cannot pass Input DS3)

SW8-8 ON = DS3 out LBO on OFF = DS3 out LBO off

SW5-8 ON = DS3 IN #2 not prov. OFF = DS3 IN #2 provisioned

SW6-8 ON = DS3 IN #3 not prov. OFF = DS3 IN #3 provisioned

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF



Figure 9-5DIP switches for DV-323 IMux applications

FW-3528

SW1

1O

N

OF

F

23

45

67

8

ON

OF

F

ON

OF

F

SW2

12

34

56

78

SW3

12

34

56

78

Output tributary

DS3 out #1

Grp1Grp2Grp3Grp4Grp5Grp6Grp7

SW4

12

34

56

78

SW5

12

34

56

78

SW61

23

45

67

8

DS3 out #2

SW7

12

34

56

78

SW8

12

34

56

78

SW9

12

34

56

78

DS3 out #3

ON

OF

F

ON

OF

F

ON

OF

F

ON

OF

F

ON

OF

F

ON

OF

F

Source configuration

Input tributary selection(valid for all 3 channels)

ON ON ON Output is blankON ON OFF Selects grp #1ON OFF ON Selects grp #2ON OFF OFF Selects grp #3OFF ON ON Selects grp #4OFF ON OFF Selects grp #5OFF OFF ON Selects grp #6OFF OFF OFF Selects grp #7

* Each of the 7 output tributaries are set independantly from the others. Settings for the given tributaries are read horizontally, across all 9 switch packs.* Multicast is supported by selecting more than ounce the same input source.* In addition,

SW1-8 ON = IMUX application OFF = MUX application

SW2-8 ON = Takes configuration from switches at start-up OFF = Takes configuration from EPROM(TL1) at start-up

SW7-8 ON = LBO #1 ON OFF = LBO #2 OFF

SW8-8 ON = LBO #2 LBO ON OFF = LBO #2 LBO OFF

SW9-8 ON = LBO #3 ON OFF = LBO #3 OFF



Procedure 9-4Installing DV-MPEG circuit packs in a DV-45 shelf

Use this procedure to install DV-MPEG circuit packs in a DV-45 shelf after the option switches have been set.

In general, DV-MPEG circuit packs can be installed in any of the slots labeled CODER or DECODER (slots 0 through 7) on a DV-45 shelf. A maximum of five MPEG circuit packs can be installed. An MCU is always installed in slot 10. Slots 8 and 9 are unused.

Care must be taken to ensure that the circuit packs are properly seated in the backplane connector.

Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 8-1 of this document for important information on how to handle circuit packs.

Tools Antistatic braceletFlat-bladed screwdriver

Action

Step Action

1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 8-1 of this document. Attach the antistatic bracelet and connect it to ground or use an antistatic mat.

2 If necessary, remove the locking bar from the DV-45 shelf as shown in Figure 9-6.

3 Determine the DV-MPEG circuit pack position in the DV-45 shelf (Figure 9-7).

4 Align the DV-MPEG circuit pack with the slot and insert it part way into the slot.

5 Open the latches on the circuit pack as shown in Figure 9-6 by squeezing lightly.

6 Insert the DV-MPEG circuit pack the remainder of the way into the slot. Use the latches to fully seat the unit in the backplane connector.

7 Replace the locking bar when the last DV-MPEG circuit pack has been installed.

—end—



Figure 9-6DV-45 shelf showing locking bar

NTST-0096

Locking Bar

NTST-0096

01

2

45

67

89

10



Figure 9-7DV-45 shelf NT2H50AC, front and rear views

FW-1487

Position # 7 6 5 4 3 2 1 0

Rear view

Position # 0 1 2 3 4 5 6 7 8 9 10

Front view

CodecNo. 1

CodecNo. 2

CodecNo. 3

CodecNo. 4

DS1units unused

MCU

Coder Decoder Coder Decoder Coder Decoder Coder Decoder MCU

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

VIDEOOUT/IN

VIDEOOUT/LOOP

VIDEOIN/OUT

VIDEOLOOP/OUT

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DS3IN/OUT

DS3MONITOR

DS3OUT/IN

DS3MONITOR

DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 4 CODEC 3 CODEC 2 CODEC 1

VIDEO & DS3 INPUT / OUTPUT FIELD

PORT 1

PORT 2

RS-232

BAT A

BAT B

DS1 FIELD FUSESRET BAT BAT RET

B A

POWER

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

CODER/DECODER DECODER/CODER CODER/DECODER DECODER/CODER CODER/DECODER

CODEC 2 CODEC 1

AUDIO INPUT / OUTPUT FIELD

MONITOR PROGRAM MONITOR PROGRAM MONITOR PROGRAM

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

DECODER/CODER CODER/DECODER DECODER/CODER

CODEC 4 CODEC 3

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

GRTG

CH1

CH2

CH3

CH4

+-G+-G+-G+-G

ALARMS

AUXILIARY

IN OUT



Procedure 9-5Upgrading DV-45 MCU firmware

Use this procedure to install a firmware upgrade in an existing DV-45 MCU (NT2H35JA or earlier) to upgrade it to handle DV-MPEG circuit pack alarms and status data.

Note: New DV-45 MCUs, PEC NT2H35KA, already come equipped with the firmware to handle DV-MPEG circuit pack alarms and status data.

Requirements Before proceeding with this procedure, see “Observing safety guidelines” on page 8-1 of this document for important information on how to handle circuit packs.

MaterialDV-45 MCU EPROM upgrade kit, PEC NT2H99KA

Tools Antistatic braceletAntistatic work surfaceFlat-bladed screwdriver Integrated circuit (IC) chip extractor (optional)IC chip inserter (optional)

Action

Step Action

1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 8-1 of this document. Attach the antistatic bracelet and connect it to ground or use an antistatic mat.

2 Locate the MCU in the DV-45 shelf, position 10.

3 Verify that there are no Unit Fail LEDs lit at the site of the MCU upgrade. Any unit failure prior to the upgrade should be investigated and corrected.

4 Identify the release number of the MCU to be upgraded.

5 Remove the locking bar from the DV-45 shelf as shown in Figure 9-6.

6 Remove the MCU from the shelf.

7 Place the MCU onto the antistatic work surface. Using a chip extractor, or a small, flat-bladed crewdriver, carefully remove the U2 and U3 EPROM chips from their sockets (see Figure 9-8 for chip location). Return these EPROM chips to Nortel.

—continued—



Procedure 9-5 (continued)Upgrading DV-45 MCU firmware

Step Action

8 Install the new U2 EPROM chip provided in the upgrade kit as follows:

a. Insert the EPROM chip into the IC chip inserter (optional).

b. Hold the EPROM chip above the socket and orient it so that the notch in the chip aligns with the notch in the socket. Be careful not to bend any of the pins on the EPROM chip. Chips must be inserted in the bottom of the chip socket.

c. One side at a time, align the pin bottoms of the EPROM chip with the corresponding holes in the socket. Be careful not to bend any of the pins on the EPROM chip.

d. With the pins on the EPROM chip well aligned with their corresponding socket holes, push the EPROM chip down until it is fully seated. This usually requires a strong push with even pressure across the chip. If any pins should bend at this point, remove the EPROM chip from the socket and replace it with a new one, or long-term reliability may be sacrificed.

9 Repeat Step 8 for the new U3 EPROM chip provided in the upgrade kit.

10 Attach the new bar code label provided in the upgrade kit to the bottom latch of the MCU to identify it as an upgraded unit.

Note: Place the new bar code label over the old bar code label so that the old release number of the MCU is still visible. This number is not changed by the firmware upgrade and remains the same.

11 Check that the MCU options are set correctly (refer to your application documentation). The EPROM upgrade itself does not require any option changes.

12 Align the MCU with the slot, and insert part-way. Open the latches by squeezing lightly (see Figure 9-6).

13 Insert the MCU into position. Use the latches to secure the card into the backplane connector.

14 Replace the locking bar.

15 Once the upgraded MCU is plugged into a powered DV-45 shelf, the green unit active LED should turn on. If the red LED remains on after power up, or turns on unexpectedly:

a. Remove the EPROM chips and check for bent pins.

b. Verify that the EPROM chips are in the correct sockets with notches properly aligned, and that they have not been confused with EPROM chips belonging to another card.

Note: Damaged or defective devices must be replaced.

—continued—



Figure 9-8DV-45 MCU EPROM locations

FW-1692.1

MCU

SHELFALARM

MAJORMINOR

ALARMCONTROL

ACO

LAMP TEST

ALARMSTATUS

BAT ABAT B

REM

ORDERWIRE

C/D 1

C/D 2

C/D 3

C/D 4

SELECT

JACK

UNITON

FAIL

AlarmCut-Off

Lamp Test/Learn

8 S

yn A

larm

Ena

ble

7 R

emot

e A

larm

Ena

ble

6 U

nuse

d5

Sin

gle

Add

ress

4 D

VLN

V1.

03

E2A

Map

ping

12

E2A

Add

ress

MS

B 0

1 E

2A A

ddre

ss L

SB

0

Syn

c A

larm

Dis

able

Rem

ote

Ala

rm D

isab

leU

nuse

dD

ual A

ddre

ssD

VLN

V2.

0E

2A M

appi

ng 2

E2A

Add

ress

MS

B 1

E2A

Add

ress

LS

B 1

SW3 SW4

DVLN Address

8

7

6

5

4

3

2

1

1

0

U2 U3



Procedure 9-6Connecting DV-MPEG encoders to DS3 carrier facilities

All eight encoder/decoder positions in a DV-45 shelf can be equipped with DV-MPEG Model 100 or Model 200 encoders. A maximum of eight video plug-ins can be installed in a NT2H50AC shelf. Use this procedure to connect DV-MPEG encoders to DS3 carrier facilities.

RequirementsIt is important to connect associated DS3 input and output signals to the correct DS3 channel. This procedure assumes that the DS3 cables have already been routed to the DV-45 shelf, dressed, and identified in preparation for connection to the DV-MPEG encoder.

Tools Antistatic braceletWire cuttersBNC crimping toolCable ties

Materials734A, 735A, or RG-59 B/U coaxial cableBelden 8281 broadcast video cable75 Ω BNC connectors75 Ω BNC terminationsRight-angle adapter A0361070 (optional)Shielded audio cable, IRPVC 24 AWG (600 Ω balanced)

Action

Step Action

1 Observe the antistatic precautions as described in “Observing safety guidelines” on page 8-1 of this document. Attach the antistatic bracelet to ground.

2 Connect the video input signal. See Figure 9-9.

3 Connect the DS3 out to the input of the transport system or the DS3 crossconnect panel. See Figure 9-9.

4 Connect the audio inputs using shielded audio cable (ensure card options are set correctly). Connect shield to ground at source.

5 If this encoder is to insert video into a DS-3 stream, connect the DS-3 to the DS-3 IN connector. If this encoder is the terminal generating the DS-3, then no action.

—end—



Figure 9-9DV-MPEG Model 100 and Model 200 encoder input/output ports

FW-3432

A- NTSC composite IN

S2 - Audio IN, right

S4 - AES/EBU Audio IN (Model 200)

S8 - Serial CLK OUT

S6 -

S1 - Audio IN, left

S5 - Serial Data OUT

S7 - Serial CLK IN

BNC group

S3 -

BNC group

Screw group

B - D1 Video IN (Model 200)

C- DS3 OUT

D - DS3 IN

A

Backplaneconnectors

B

C

D

s2s1s4s3s6s5s8s7

+-G

+-G

+-G

+-G

+-G

+-G

+-G

+-G

Faceplatewith LEDs

DV-MPEG CoderModel 100 or 200

circuit pack

Screw group



Procedure 9-7Connecting DV-MPEG decoders to DS3 carrier facilities

All eight encoder/decoder positions in a DV-45 shelf can be equipped with DV-MPEG Model 100 or Model 200 decoders. Use this procedure to connect DV-MPEG decoders to DS3 carrier facilities.

RequirementsIt is important to connect associated DS3 input and output signals to the correct DS3 channel. This procedure assumes that the DS3 cables have already been routed to the DV-45 shelf, dressed, and identified in preparation for connection to the DV-MPEG decoder.


Materials734A, 735A, or RG-59 B/U coaxial cableBelden 8281 broadcast video cable75 Ω BNC connectors75 Ω BNC terminationsRight-angle adapter A0361070 (optional)Shielded audio cable, IRPVC 24 AWG (600 Ω balanced)

Action

Step Action


2 Connect the DS3 in from the transport system or DS3 crossconnect panel. See Figure 9-11.

3 Connect the video output signal. See Figure 9-11.

4 Connect the audio outputs using shielded audio cable (ensure card options are set correctly). Connect shield to ground at source.

5 If this DS-3 contains other video signals to be extracted, then connect the DS-3 out to the input of the next decoder unit.

—end—



Figure 9-10DV-MPEG Model 100 or Model 200 decoder input/output ports

FW-3439

A- Composite OUT

S2 - Audio OUT, right

S4 -

S8 - Serial CLK IN

S6 -

S1 - Audio OUT, left

S5 -

AES/EBU S3 - Audio Out (Model 200)

S7 - Serial Data IN

BNC group

Screw group

B - D1 Video OUT (Model 200)

C- DS3 IN

D - DS3 OUT

A

Backplaneconnectors

B

C

D

s2s1s4s3s6s5s8s7

+-G

+-G

+-G

+-G

+-G

+-G

+-G

+-G

Faceplate with LEDs

DV-MPEG DecoderModel 100 or 200

circuit pack

Screw group

BNC group



Procedure 9-8Connecting a DV-323 Mux/IMux to DS3 carrier facilities

All eight encoder/decoder positions in a DV-45 shelf can be equipped with a DV-323 Mux/IMux circuit packs (maximum of five units per shelf). Use this procedure to connect DV-323 Mux/IMux circuit packs to DS3 carrier facilities.

DV-323 Mux/IMux circuit packs complement the DV-MPEG codecs by providing concentration or splitting of DS3 signals from aggregated or individualized DS2 streams. This allows maximum use of broadband transmission resources.

RequirementsIt is important to connect associated DS3 input and output signals to the correct DS3 channel. This procedure assumes that the DS3 cables have already been routed to the DV-45 shelf, dressed, and identified in preparation for connection to a DV-323 Mux/IMux circuit pack.


Materials734A, 735A, or RG-59 B/U coaxial cable75 Ω BNC connectors75 Ω BNC terminationsRight-angle adapter A0361070 (optional)

Action

Step Action


2 For the Mux function, connect up to three DS3 source signals, one to each DS3 in, 75 Ω BNC connector (see Figure 9-11). Connect the multiplexed DS3 out signal to the input of the transport system or output of the DS3 crossconnect panel.

—continued—



Procedure 9-8 (continued)Connecting a DV-323 Mux/IMux to DS3 carrier facilities

Step Action

3 For the IMux function, connect the multiplexed DS3 in from the transport system or DS3 crossconnect panel to the DS3 in, 75 Ω BNC connector (see Figure 9-11). Connect the up to three demultiplexed DS3 output signals to the appropriate DS3 destination ports.

Figure 9-11DV-323 Mux/IMux input/output ports

FW-3547

—end—

BNC Group

A1

Backplaneconnectors

B1

C1

D1

s5s1s6s2s7s3s8s4

Faceplate

Screw Group

A1 - DS3 A-inputB1 - DS3 B-inputC1 - DS3 C-inputD1 - DS3 out

A1 - DS3 inB1 - DS3 B-outputC1 - DS3 C-outputD1 - DS3 D-output

MUX IMUXConnector designation



Procedure 9-9Installing a fan shelf cooling unit

DV-MPEG circuit packs require forced air cooling. This procedure explains how to install a fan shelf above the DV-45 shelf. A filter tray is also required to prevent dust accumulation on the circuit packs.

Action

Step Action

1 Install the fan shelf cooling unit in the bay above the NT2H50 DV-45 shelf that will contain the DV-MPEG circuit packs.

2 Install a filter tray with the exhaust fan.

3 Locate an available fuse or breaker on the panel at the top of the bay. Ensure that the fuse or breaker has the correct ampere value for the fan shelf. Remove the fuse or open the breaker.

4 Run wire from the fan shelf to the panel. Two wires are required for an unprotected supply, or four wires are required for protected power.

5 Terminate the wires with proper lugs or connectors. Connect them to the panel and the fan shelf.

6 Insert the fuse or close the breaker. Ensure that the fan shelf is running.

—end—


10-1

Testing DV-MPEG circuit packs 10-This chapter provides the test procedures required to ensure the proper operation of Nortel (Northern Telecom) DV-MPEG circuit packs.

Figure 10-1 illustrates the typical test configuration required to test video and audio parameters for the DV-MPEG circuit packs.

Figure 10-1Typical test configuration for testing DV-MPEG circuit packs video and audio parameters

FW-3682

DV MPEGencoder

Analog Out

Full field Out(Rear Connector)

Full field

DS3 Out DS3 InVideo Out

Video In Video In

CH A Out

CH A In

Audio Out

Video In

Audio In

75 OHmTerminator

75 OHmTerminator

Analog In

DV MPEGdecoder

Audio generator/analyzer

(Tek AM 700)

Waveformmonitor

(Tek VM 700 A)

Waveformgenerator(Tek 1910)

Videomonitor

Videomonitor


10-2 Testing DV-MPEG circuit packs

Video testsEquipment

The following equipment or equivalent was used for the test procedures:

• Tektronix 1910 video test signal generator

• Tektronix VM700A video waveform analyzer using software version 2.06 or later

• Tektronix AM700

Measurements using the Measure Mode feature on the Tektronix VM700A video waveform analyzer are preferred over measurements taken using the VM700A Auto Mode feature. This is due to the accuracy of the Measure Mode feature and its ability to use averaging and auto referencing (normalizing). However, in the event that a large number of video channels are to be tested, it may be decided that the accuracy of the Auto Mode feature is sufficient given the speed with which test measurements can be made.

Note: Always use the averaging option on the Measure Mode feature when possible.

When using the Auto Mode feature on the Tektronix VM700A video waveform analyzer, always compare the Auto mode measurement against the Measure Mode measurement for the first video channel. If the difference between the two is acceptable, use Auto Mode for that particular test procedure for all the video channels, if desired. If during formal testing any doubt arises about the validity of any particular Auto Mode measurement, Measure Mode takes precedence for that particular measurment.

Figure 10-2 through Figure 10-12 show various snapshots of Tektronix VM700A video waveform analyzer screens for reference when testing.



Figure 10-2Screen reference 1, Tektronix VM700A video waveform analyzer

NTST-0086


NTST-0072

120.0

110.0

100.0

90.0

80.0

70.0

60.0

50.0

40.0

30.0

20.0

10.0

0.0

Bar & LineTimeField = 1 Line = 100

Wfm --> NTC-7 Composite

100 % = Bar Level

Bar Level (Ref. b1)Bar Level (Ref. Back Porch)Sync LevelSync to Bar TopSync/Bar Ratio (100% = 4/10)LineTime Dist. (Rec. 567)Bar Tilt (Rec. 569)Bar Width

= 100.2 IRE

= 100.3 IRE

= 40.1 IRE= 140.1 IRE= 100.1 %

= 0.3 %

= 0.1 %

= 18.0 u sec

1

2

NTST-0072

Bar AmplitudeSync Amplitude

Line Time Distortion

Chroma-Lum DelayChroma-Lum Gain

Differential GainDifferential Phase

Field Time Dist

100.440.2

0.3

17.399.8

1.830.87

-------

IRE% Bar

%

ns%

%Deg

% Bar

At 54% APLAt 54% APL

Not Found

Violated Lower

LimitsUpper

* -3.00 3.00

5

6

1

2

3

4




NTST-0085

NTST-0085

108.0110.0

106.0104.0

116.0118.0

114.0112.0

102.0100.098.096.094.092.090.088.086.084.082.080.0

-60.0

Average 32 -> 32 Reference(1) Fri Jan 19 15:14 (A) NTC-7 Composite

-40.0 -20.0 0.0 20.0 40.0 60.0

Chroma Delay (n sec)

Chrom/Lum Gain DelayField = 1 Line = 100

Chroma Gain (%)


Chroma Gain = 98.1 %Chroma Delay = -4.3 n sec

1

2




NTST-0087

NTST-0087

0.0-0.5-1.0-1.5-2.0-2.5

2.52.01.51.00.5

1st.

Average 32 -> 32 Reference (1) Tue Sep 19 13:06 (A) NTC-7 Composite

Differential Phase (deg) min = -0.34 max = 0.03 pk-pk = 0.37

2nd. 3rd. 4th. 5th. 6th.

0.00 -0.34 -0.19 -0.23 0.03 -0.32

1

2

0.0-0.5-1.0-1.5-2.0-2.5

2.52.01.51.00.5

1st.

Differential Gain (%) min = -0.31 max = 0.48 p-p/max = 0.79

DG DP Wfm --> NTC-7 CompositeField = 1 Line = 100

2nd. 3rd. 4th. 5th. 6th.

0.00 0.48 -0.02 -0.31 0.45 -0.01




NTST-0073f


NTST-0066

NTST-0073Violated Lower

LimitsUpper

Bar AmplitudeSync Amplitude

Line Time Distortion

Chroma-Lum DelayChroma-Lum Gain

Differential GainDifferential Phase

Field Time Dist

------40.0

------

------------

--------------

0.77

IREIRE

%

ns%

%Deg

% Bar

**

****

98.3

-33.096.0

101.7

33.0104.0

Bar Not Found100 IRE = 714 mV

No Composite VITS

No Composite VITSNo Composite VITS

No Composite VITSNo Composite VITS

Full-Field Sq. Wave1

NTST-0066

110.0100.090.080.070.060.050.040.030.020.010.00.0

-10.0-20.0-30.0-40.0-50.0-60.0

1.0sec/div

Bounce (Trigger Mode)Level (IRE 100 = 714mV) Bounce, Sync & Back Porch are displayed

(High APL) Settle to 1.0% in 0.0 sec.Sync Ampl. = 39.9 IRE

Bounce Amp. = 100.2 IRE(Low APL) Settle to 1.0% in 0.0 sec.

Sync Ampl. = 39.5 IRE

Dev. = 0.6% -0.3% 0.9% p-pDev. = 3.4% -0.4% 3.8% p-pDev. = 0.5% -0.3% 0.8% p-pDev. = 0.1% -0.1% 0.2% p-pDev. = 2.2% -0.3% 2.5% p-p

(High, Low APL) Blank Lvl Diff. = -0.4% Sync Amp. Diff. = -0.8%

Average Off Clamp off, DC coupled

1

2

3 4




NTST-0088

NTST-0088

8.0

10.0

6.0

4.0

2.0

0.0

-2.0

-4.0

-6.0

-8.0

-10.0

-12.0

-14.0

-16.0

-18.0

-20.00.5

Average 32 -> 32 Reference(1) Fri Jan 19 15:44 (A) FCC Multi Burst

1.25 2.0 3.0 3.58 4.1

-0.09 -0.17 -0.26 -0.12 -0.10 -0.18

(MHz)

Multi BurstField = 1 Line = 100

Amplitude (0 dB = 60 % of 99.8 IRE flag) (dB)

Wfm --> FCC Multi Burst




NTST-0069


NTST-0068

Average 32 -> 32 Displaying Rising Edge

Short Time DistortionField = 1 Line = 99


IEEE-511 5.0% Rising Edge = 1.5 % SDRise Time = 131.0 nSec

NTST-0069

1

NTST-0068

0.0-5.0

-10.0-15.0-20.0-25.0-30.0-35.0-40.0-45.0-50.0-55.0-60.0-65.0-70.0-75.0-80.0-85.0-90.0-95.0

-100.0

1.0 2.0 3.0 4.0 5.0(MHz)

Noise spectrum Wfm --> RampField = 1 Line = 100Amplitude (0 dB = 714 mV p-p) Noise Level = -60.5 dB rms

Average 32 -> 32 Reference (2) Thu Sep 07 13:43 (A) Ramp

Band width 100kHz to 5.0MHz (Unified) (Tilt Null)

1




NTST-0089


NTST-0071

NTST-0089

-15.0 -10.0 -5.0 0.0 5.0 10.0 15.0

Average 32 -> 32

H Sync Jitter in a Frame

Line Jitter (Line 20 to 250) -- 0 n sec p-p 1

FIELD1

FIELD2

11

525

NTST-0071

50.045.040.035.030.025.020.015.010.05.00.0

-5.0-10.0-15.0-20.0-25.0-30.0-35.0-40.0-45.0-50.0

2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0sec

Frame Jitter Waveform

n sec (Frame Period Jitter) Pk to Pk 12 n sec 1



Video test resultsBar amplitude

When verifying the insertion gain variation, the DV-MPEG encoder analog input stage has an AGC circuit that adjusts the gain based on the level of the horizontal blanking section of the video signal. Therefore, the measurement of the bar level should be done in absolute mode instead of relative to a reference established during a bypass of the codec.

Chrominance-luminance delay inequalityWhen verifying the chrominance-luminance delay inequality, the presence of a notch filter in the DV-MPEG encoder will affect the measured chrominance-luminance delay which can give results in the 100 nsec. range.

Normalizing test resultsUsing Measure Mode Using the Measure Mode feature on the Tektronix VM700A video analyzer, normalize test results as follows:

Note 1: If automatic referencing is unavailable when using the Measure Mode feature to normalize test results, use the Auto Mode feature.

Note 2: Always use the averaging option on the Measure Mode feature when possible.

1 Before the start of formal testing, directly measure the Tektronix 1910 video generator with the VM700A video analyzer through the end-to-end cabling to be used for the test.

2 Store the result on the VM700A as either Ref 1 or Ref 2. Any difference from an optimal result is equipment error.

3 Normalize the actual test result, using the same 1910 video generator output port signal and the same VM700A input port signal, by automatically referencing it against the stored reference.

Using Auto Mode Using the Auto Mode feature on the Tektronix VM700A video analyzer, normalize test results as follows:

1 Before the start of formal testing, directly measure the Tektronix 1910 video generator with the VM700A video analyzer through the end-to-end cabling to be used for the test.

2 Print out the results. Any difference from an optimal result is equipment error.

3 Normalize the actual test result, using the same 1910 video generator output port signal and the same VM700A input port signal, by manually referencing it against the print out. That is, subtract the direct measurement from the test measurement.



Audio testsIncluded in the MPEG2 with the video information, are two analog audio channels. Each channel is independent and has a bandwidth of 20 kHz. Initially only L&R channels will be available (Stereo, mono, dual mono), 600 Ω balanced (plus, minus, ground). Refer to Figure 10-1 for the general audio tests set-up.

Sampling frequencies are:

• 48 kHz

• 44.1 kHz (allowing compatability with CD’s, DVTR’s and other playback equipment)

Perform the tests whenever possible at:

• Consumer audio level +8.0 dBm (± 2.8 V) and Professional audio level +18.0 dBm (± 15 V). Set the appropriate encoder and decoder unit jumpers for audio level selection

• Left and Right audio channels

• 48.0 kHz and 44.1 kHz sampling frequencies

Test resultsDigital audio inter-channel phase differenceWhen using the digital audio interface, the user will notice that the phase difference between the two audio channels is not equal to 0. It varies with frequency and is approximately 7.5 degrees at 1 kHz.

Audio spurious tonesAudio input frequencies between 17 kHz and 21 kHz produce spurious tones which will appear as modulation on the waveform. This modulation produces lower frequencies at lower levels. If the Audio input level at those frequencies is high (for example, 10 dBm), these lower frequencies could be heard.



List of proceduresTable 10-1 lists the video testing procedures, Table 10-2 lists the audio testing procedures, and Table 10-3 lists the alarm tests.

Table 10-1Video testing task list

Task Page

Measure shelf powerr 10-13

Verifying video signal continuity 10-15

Table 10-2 Audio testing task list

Task Page

Testing analog audio continuity (insertion gain) 10-16

Verifying audio frequency response 10-17

Table 10-3Alarm testing task list

Task Page

Testing minor and major alarm relay closures 10-18

Testing E2A (TBOS) alarm interface 10-19

Testing TL1 alarm interface 10-20



Procedure 10-1Measure shelf power

Purpose: This procedure lists the steps required to verify the power connections and power cable polarity for a shelf.

Test apparatus: Digital multimeter (for example, Fluke 77)

Action

Step Action

1 Unplug all plug-in modules from the shelf under test (new shelf only).

2 Apply power to the shelf.

3 Measure the voltage and polarity of both A and B feeds at the power terminal block located at the rear of the shelf (see Figure 10-1). Ensure that the measurements meet the requirements of Table 10-1 and record these values for formal system line-up and testing.

—continued—

Table 10-4Required operating voltage

Shelf powerterminal block

Requiredvoltage

A-A+B-B+

-42 to -56 V dcgnd

-42 to -56 V dcgnd



Procedure 10-1 (continued)Measure shelf power

Figure 10-13DV-45 shelf - power leads

FW-0300

—end—

A - (-48 V) RedB - (-48 V) Red/Blue

B + (Return) White/BlueToPowerDistribution

Snap-onCover

Shelf Power Terminal Block

A + (Return) White/Red



Procedure 10-2Verifying video signal continuity

Use this procedure to verify the continuity of DV-MPEG encoder and decoder video signals for each of the video channels.

Requirements Use cables that are no more than 1.5 m (5 ft) in length.

Ensure that video equipment and test sets are properly grounded (chassis to chassis). Improper grounding could cause false measurements and affect picture quality.

Allow generators, monitors, and plug-ins to warm up for 20 minutes before performing detailed measurements.

Equip unused slots with blank cards to ensure proper electromagnetic interference (EMI) shielding.

Conduct all video tests with the Active lines, and all video measurements on field 1, line 100. In addition, all video tests should use the same 1910 video test signal generator output port and the same VM700A video waveform analyzer input port.

ToolsTektronix 1910 video test signal generator Tektronix VM700A video waveform analyzer using software version NTSC 2.06 or later

Materials Video test cords75 Ω Belden coaxial cable with BNC connectors75 Ω BNC terminations

Action

Step Action

1 Using the test configuration shown in Figure 10-1, verify that the video signal carried by each channel is reproduced without any notable degradation. If there is signal degradation on any channel, see chapter 3 of this document and Nortel Alarm and Trouble Clearing Procedures, 323-1401-543, to help determine the cause.

—end—



Procedure 10-3Testing analog audio continuity (insertion gain)

This procedure verifies the continuity of the analog audio channels. The audio channels have a bandwidth of 20 kHz, an impedance of 600 Ω and a nominal level of +8.0 dBm (or +18 dBm).

Action

Step Action

1 Set the jumpers for Consumer option (or Professional, as appropriate).

2 On the AM700 audio transmission test set, set the impedance to 600 Ω, the output amplitude to 8 dBm (or 18 dBm, depending on the test performed), and the output frequency to 1000 Hz.

3 Connect the output of the test set to the input of the audio channel (Right) being tested on the Encoder. At the decoder, connect the output of the audio channel (Right) being tested to the audio transmission test set input.

4 Measure the amplitude of the output signal.

5 Repeat steps 3 and 4 for the Left audio channel.

6 Repeat steps 3 to 5 for the opposite direction.

Specifications

—end—

Table 10-5Insertion gain specifications

Option Specification

Consumer +8 dBm±0.50 dB

Professional +18 dBm±0.50 dB



Procedure 10-4Verifying audio frequency response

Frequency Response is performed from 20 Hz to 20 kHz and is not specified at any particular program level - the assumption being that the system is linear up to the overload level.

Action

Step Action

1 Set the jumpers for Consumer option (or Professional, as appropriate).

2 Use the AM700 in the following set-up:Audio analyzer modeQuick set-up: frequency responseView set-up, view types, measurements: level versus Chanel 1 frequency

Specifications

—end—

Table 10-6Frequency response

Frequency +8 dBm(Consumer)

+18 dBm(Professional)

20 - 100 Hz + 0.5 dB / - 3 dB + 0.5 dB / - 3 dB

100 Hz - 18 kHz ± 0.5 dB ± 0.5 dB

18 kHz - 20 kHz + 0.5 dB / - 3 dB + 0.5 dB / - 3 dB



Procedure 10-5Testing minor and major alarm relay closures

This procedure lists the steps required to verify the proper operation of the minor and major alarm relays.

Note: The optional NT2H35KA MCU unit provides alarm outputs for use with office surveillance systems. The MCU provides normally open and normally closed relay outputs for major and minor alarm conditions. There are audible major and minor alarm outputs that are silenced with an alarm cut-off (ACO) and visual type indications that remain on as long as the alarm condition is present.

RequirementsDigital multimeter (for example, Fluke 77)

Action

Step Action

Minor alarm tests

1 With only the MCU module in the shelf, remove one of the GMT fuses at the rear of the shelf.Requirement: The Minor LED illuminates along with Bat A or Bat B on the MCU faceplate.

2 Measure the minor alarm relay contacts.Requirement: NO to COM = 0 Ω; NC to COM = Open

3 Replace the fuse.Requirement: The Minor LED extinguishes on the MCU faceplate.

4 Measure the minor alarm relay contacts.Requirement: NO to COM = Open; NC to COM = 0 Ω

Major alarm tests

5 Remove one of the video inputs to a encoder unit.Requirement: The Major LED illuminates on the MCU faceplate.

6 Measure the major alarm contacts.Requirement: NO to COM = 0 Ω; NC to COM = Open

7 Replace the video input.Requirement: The Major LED extinguishes on the MCU faceplate.

8 Measure the major alarm contacts.Requirement: NO to COM = Open; NC to COM = 0 Ω

—end—



Procedure 10-6Testing E2A (TBOS) alarm interface

This procedure lists the steps required to verify the proper operation of the E2A (TBOS) alarm interface.

Note: A TBOS serial alarm interface is provided that complies with the E2A APR standard. For the alarm mappings, see “TBOS alarm indications” on page 3-1. Between polls the tri-state output drivers of the E2A port go to a high impedance state.

RequirementsTempo Instruments KS 22828 TBOS test set

Action

Step Action

1 Connect the TBOS test set to the transmit and receive serial alarm bus at the rear of the DV-45 shelf.

2 Remove the GMT fuse for battery A from the rear of the DV-45 shelf.

3 Ensure that a minor alarm and battery A failure indications are present on the MCU faceplate. If the shelf is equipped with coder or decoder modules, there will be a major alarm as well.

4 Scan the first alarm byte for the shelf.

Requirement: The shelf minor alarm will be active. For E2A alarm mapping tables, see “TBOS alarm indications” on page 3-1.

—end—



Procedure 10-7Testing TL1 alarm interface

For TL1 alarm interface testing procedures, refer to Northern Telecom FWP02 3.03 Addendum, Digital Video Codec DV-45, Chapter 5, PEC NT2H7914.



Digital Video CodecDV-45DV-MPEG Cards Reference Manual

1998 Northern TelecomAll rights reserved

All information contained in this document is subject to change without notice. Northern Telecom reserves the right to make changes to equipment design or program components, as progress in engineering, manufacturing methods, or other circumstances may warrant.

DV-45, the Nortel logo, and S/DMS TransportNode are trademarks of Northern Telecom.

323-1401-381FWP02 3.01 StandardMarch 1998Printed in Canada

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