Manuale d’istruzioni d’uso - Eurotek Telecomunicazioni · consciousness, the breathing mouth to...

EK-DTX/2 DVB-T2 version 1

601-000021/MN Rev. D (DVB-T2 version) Arch. 4536 14/07/2014

User Manual

EK-DTX/2

DVB-T2 Exciter Version

2 DVB-T2 version EK-DTX/2 14/07/2014 Arch. 4536 601-000021/MN Rev. D (DVB-T2 Version)

The present design is property of Eurotek s.r.l. and is protected by Copyright.

Its reproduction, distribution and disclosure to third-parties without written authorisation is forbidden.

Every reproduction, re-distribution or disclosure without prior written authorisation

is expressly forbidden by the law and can lead to serious civil and penal sanctions.



Warning!

The socket utilized for the unit supply must have the appropriate ground conductor.

The connection of the unit , to a socket without the ground conductor, will make the whole

equipment dangerous for people safety.

About the repairing of the units please refer to specialized personnel only .

Inside the devices there are voltages which could be dangerous to people.

Before opening the cover switch off the unit, disconnect the connection and

the supply cables.

In case of electrical shock please follow the instructions

of first aid listed on page 4

Substitute the fuses interrupted with others of the same type and voltage.

The waste disposal of the devices must be executed in the respect of the enforced laws in

the country uses.

Eurotek not assumed responsibility for waste disposal in contrast with enforced laws.

LIFE SUPPORT APPLICATIONS.

Eurotek’s products are not designed for use as critical components in life support devices or system

without the express written approval of the Eurotek S.r.l. As used herein.

- Life support devices or system are devices or system which, (a) are intended for surgical

implant into the body, or (b) support or sustain life, and whose failure to perform, when

properly used in accordance with instructions for use provided in the labeling, can be

reasonably expected to result in a significant injury to the user.

- A critical component is any component of a life support device or system whose failure to

perform can be reasonably expected to cause the failure of the life support device or system,

or to affect its safety or effectiveness.

The information given in this documentation could have variations without forewarning.

The firm Eurotek S.r.l. does not give any guaranty about this documentation.

The firm Eurotek S.r.l. does not consider itself responsible for possible mistakes which could be

found in this documentation.


First aid: artificial breathing(mouth to mouth)

1

In case of electric shock you have to ensure the first aids to

the patient, but to do this you have to consider two very

important things:

- interrupt immediately the electric circuit;

- if the circuit has not been interrupted, do not touch

the patient with bare hands;

After doing this, without delay contact the nearest mobile

unit of first aid and practice to the patient, in case of loss of

consciousness, the breathing mouth to mouth as described

below.

2

Put the patient lying on his back with the arms parallel to

the body, ensure that he does not have the breathing tracts

obstructed (chewing-gum, dental prosthesis, etc.),

otherwise set him free from foreign bodies.

Kneel near the patient’s head and putting a hand under his

neck, incline as possible his/her head backwards.

3

Going on with keeping the patient’s head inclined with one

hand, use the other one to occlude the nostrils, if you are

going to practise the breathing through the oral cavity, or

occlude the mouth if you want to do it through the nasal

cavity.

While doing this begin the auto-oxygenation, with deep

breathing.

Then practice the artificial breathing blowing in the chosen

cavity beginning with ten expirations each minute to go on

them with twelve and fifteen.

4

During the breathing procedure you have to control that the

patient’s chest dilates, otherwise change cavity where to

blow the air because the previous one could be obstructed.

5 Do not ever stop the artificial breathing until the patient

has recovered or the first aid unit has come.



INDEX

INDEX ................................................................................................................................................... 5

ABBREVIATIONS .............................................................................................................................. 6

NORMATIVE REFERENCES .......................................................................................................... 6

1. GENERAL DESCRIPTION ....................................................................................................... 8

INTRODUCTION ................................................................................................................................... 8

1.1 STREAM PORTS UNIT ............................................................................................................. 10

1.1.1 SFP unit ....................................................................................................................... 10

1.1.2 Internal transport stream unit ...................................................................................... 12

1.1.3 DMA block ................................................................................................................... 13

1.1.4 Tx Ports Unit ................................................................................................................ 14

1.1.5 Mod In unit ................................................................................................................... 15

1.2 MODULATOR UNIT ................................................................................................................ 17

1.3 RF UNIT ................................................................................................................................ 18

1.4 GPS UNIT .............................................................................................................................. 19

2. BOARD PANEL......................................................................................................................... 20

2.1 EK-DTX/2 BOARD PANEL ..................................................................................................... 20

2.2 SFP MODULE......................................................................................................................... 21

3. EK-DTX/2 TECHNICAL SPECIFICATIONS ....................................................................... 22

4. BOARD MENU .......................................................................................................................... 23

4.1 EK-DTX/2 MENU STRUCTURE .............................................................................................. 23

4.2 EK-DTX/2 MENU DESCRIPTION AND KEYBOARD GUIDE ....................................................... 27

4.3 EK-DTX/2 VARIABLES SETTING EXAMPLE ........................................................................... 41

5. REMOTE CONTROL............................................................................................................... 43

ANNEX A - AGC SETTING PROCEDURE .................................................................................. 44


ABBREVIATIONS

For the purposes of the present document, the following abbreviations apply:

NORMATIVE REFERENCES

[1] ETSI EN 302 755: "Digital Video Broadcasting (DVB); Frame structure channel coding and

modulation for a second generation digital terrestrial television broadcasting system (DVB-

T2)".

[2] ETSI TS 102 606: "Digital Video Broadcasting (DVB); Generic Stream Encapsulation (GSE)

Protocol".

[3] ETSI TS 101 191: "Digital Video Broadcasting (DVB); DVB mega-frame for Single

Frequency Network (SFN) synchronization".

[4] ETSI EN 301 192: "Digital Video Broadcasting (DVB); DVB specification for data

broadcasting".

1PPS One-pulse-per-second (Signal from GPS receiver)

AGC Automatic Gain Control

ASI Asynchronous Serial Interface

ASW Transport streams seamless switch

DMA Transparent demultiplexer

EK-MFR/x EK-MFR/1 and EK-MFR/2

EK-UNM/x EK-UNM/2 and EK-UNM/3

FIFO FIFO First In First Out

ISSY Input Stream SYnchronizer

MFN Multiple Frequency Network

MPA Transparent multiplexer

NA Not Available

NPD Null-Packet Deletion

OFDM Orthogonal Frequency Division Multiplexing

PAT Program Association Table

PLP Physical Layer Pipe

PLP_NUM_BLOCKS Number of FEC blocks contained in the current Interleaving Frame

RX Receiver

SFN Single Frequency Network

SFP Small form-factor pluggable

TS Transport Stream

TX Transmitter

T2-MI DVB-T2 Modulator Interface

TS Transport Stream



[5] ETSI TS 102 034: "Digital Video Broadcasting (DVB); Transport of MPEG-2 TS Based

DVB Services over IP Based Networks".

[6] IETF RFC 3550: "RTP: A Transport Protocol for Real-Time Applications".

[7] ISO/IEC 13818-1: "Information technology - Generic coding of moving pictures and

associated audio information: Systems".

[8] ETSI EN 300 468: "Digital Video Broadcasting (DVB); Specification for Service Information

(SI) in DVB systems".

[9] ETSI TS 102 992: "Digital Video Broadcasting (DVB); Structure and modulation of optional

transmitter signatures (T2-TX-SIG) for use with the DVB-T2 second generation digital

terrestrial television broadcasting system".

[10] ETSI TS 102 831: "Digital Video Broadcasting (DVB); Implementation guidelines for a

second generation digital terrestrial television broadcasting system (DVB-T2)".


1. GENERAL DESCRIPTION

INTRODUCTION

The EK-DTX/2 board works as DVB-T2 modulator. The board allows to obtain the digital

modulation in according with the DVB-T2 standard transport stream transmission ETSI 302 755

v1.3.1 [1, 10]. Moreover it manages all the variables needed to obtain a power amplifier deliverable

signal.

The EK-DTX/2 is designed to support TS and T2MI stream, Multiple Frequency Network (MFN)

and Single Frequency Network (SFN) modes.

We can split up the block scheme reported in figure 1.0, into different section below depicted:

Stream ports unit

Modulator unit

RF unit

GPS unit

A GPS receiver allows to lock the internal reference to GPS signal. Moreover it is possible to lock to

external 1pps signals.



Fig.1.0: EK-DTX/2 block scheme


1.1 STREAM PORTS UNIT

1.1.1 SFP unit

The EK-DTX/2 is featured by two SFP interfaces. On the front panel are placed two SFP bays allow

to manage ASI transport streams.

Every SFP interface is composed by a transmitter and a receiver part.

Fig.1.1a: SFP Transmitter Part Block Scheme

Fig.1.1b: SFP Receiver Part Block Scheme

Bypass option (Only available with

005-001772 SFP module)



1.1.1.1 SFP Module Bypass

The optional SFP module 005-001772 (see Table.2) allows to electrically connect the signal from

RX to the TX connector.

When the board is powered on, the bypass is automatically activated only in these two cases :

1. in Tx Ports/SFP Tx-n there is selected None, i.e. no transport stream is connected to SFP

transmitter.

2. the transmitted transport stream contains errors and in Port Sel/SFP Tx-n there is a selection

different from None.

When the board is powered off, the routing RX to TX is always established inside the SFP. This

feature is very useful in systems need redundancy.

It is possible to remove the SFP module from the EK-DTX/2 board leaving the connection active.

Fig.1.1.1: SFP Receiver Part Block Scheme

SFP RX

P

Bypass

SFP TX

RX

TX

SFP Module

005-001772

Tx Ports

SFP Interface

TX Part

RX Part


1.1.2 Internal transport stream unit

In addition to the two SFP connectors, the board allows to manage the transport stream with two

supplementary internal connection (Int1, Int2) for the routing between boards.

It is possible to set the direction (TX or RX) for these internal ports by the menu, it is used as

transmitter only if in Tx Ports there is a selection different from None, otherwise it is used as

receiver.

Following are reported the functional block for the internal connection.

Int TX DMA

DMA VC

DMA Pid

Int RX DMA

DMA VC

DMA Pid

Selectable input

Tx Ports menu

and Mod In menu

Fig.1.2a: Internal Transmitter Part Block Scheme

Fig.1.2b: Internal Receiver Part Block Scheme

Selectable output

Int Tx-n

Tx Ports menu



1.1.3 DMA block

Every input/output unit has a dedicated DMA block. The DMA allows to carry out a single transport

stream from a multiplexed transport stream.

When it is enabled the packet selector module filters out all the packets except those with the

selected DATA PID. The transport stream is then sent to the VC demapper in order to extract the

selected virtual channel towards the output.

Fig.1.3: DMA block scheme


1.1.4 Tx Ports Unit

A router implemented on the Tx Ports unit allows to send on each output port the desired transport

stream; the following figure shows all the ports of the router, it is possible to connect any input to

any output without limitation.

Fig.1.4: Port Sel block scheme



1.1.5 Mod In unit

The Mod In unit works as a transport stream switch, it allows to switch one of three different

inputs: In1, In2, In3. The output it is used to feed the DVB-T2 Modulator, in addition the user

can send the same signal (Mod In) to the output ports, using Tx Ports menu (see Par 1.1.4).

The switch can be manual or automatic, the second option permits a seamless switch and is

completely managed by the microprocessor unit in according with the priority order: In1,In2 and

In3. In “automatic mode”, the system analyzes the input transport streams and decides which

stream must be sent to the output according with the status of the selected inputs.

If the Alignment Src option is enabled the system switches between inputs that are previously

aligned from digital delay lines (FIFO). The algorithm introduces a latency of 16 packets. This

feature is very useful in order to compensate the time of arrival differences between the transport

streams which arrive at the inputs of the board from different paths with different number of

links.

If “Reversible” option is enabled the highest priority stream with a valid state is sent to switch

output, the priority order that is used is In1, In2, In3. This means that if In1 input is not valid and

In2 is valid, the algorithm sends In2 input to the switch output; as soon as In1 becomes valid it is

sent to the output immediately. If this feature is disabled, the stream going on the switch output it

is maintained until it faults, disregarding the status of the other inputs.

Note: to use the Alignment Src option it is necessary to have inputs with the same content.

Mod In switch is designed to be part of a diversity system for multipath effect mitigation.

Parameters that are analyzed by the switch:

Carrier detection

Sync detection (x”47”)

8b/10b Error

Packet Lost detection (packet period instability)

Check of TEI bit (Transport Stream Error Indicator).

Note: EK-UNM/x modems set TEI bit if the packet is corrupted from Reed-

Solomon error correction inability.

PAT presence (only if PAT detection is enabled)


Fig.1.5: Mod In block scheme

In1

P

Sel Mode

In1 State

In2

In3

Reversible Alignment Src

Selectable input

Mod In menu

Fifo

Fifo

Fifo

TS

Analyser

Real Time

Switch manager

TS

Analyser

TS

Analyser

PAT Det

In2 State In3 State

Selectable output

Mod In

Tx Port menu

Modulator Input



1.2 MODULATOR UNIT

The signal coming from the Mod In unit is processed by Modulator unit.

The OFDM modulator generates the symbols processing the TS in respect of DVB-T2 Standard

ETSI 302 755 v1.3.1 [1, 10].

The user can choose the input format that can be: TS or T2-MI [1, 10].

The modulator can work in single or multiple PLP (only T2-MI mode) [1, 10].

On the output of the OFDM modulator are present the I and Q signals that are sent to the DAC for

the up-conversion to RF channel.

Fig.1.6: Modulator unit block scheme


1.3 RF UNIT

The I/Q data coming from DVB-T2 modulator feed the DAC with direct up-conversion in order to

achieve the desired RF transmission frequency. The user can adjust the output frequency with 0.1 Hz

resolution.

The EK-DTX/2 board presents two independent NL precorrectors which allow to compensate the

amplitude and phase non-linear distortion introduced by the amplifiers chain. One precorrector is

adaptive and corrects automatically the output basing on RF In signal. The other precorrector is

adjustable manually and the user can manage the correction working on the K values which

compensate the amplitude and the P values to compensate the phase.

The AGC block allows to control power out level of the EK-DTX/2 board. The microprocessor

controls the gain of the output amplifier in respect of the RF Out level measured by an RMS detector.

Fig.1.7: RF unit block scheme



1.4 GPS UNIT

The GPS unit allows to lock the internal clocks of the EK-DTX/2 in according with the GPS signal,

The GPS receiver (RX GPS) can be connected to a GPS antenna using the GPS IN connector.

While the GPS receiver is correctly locked an accurate timing signal is provided at its 1pps output

(1pps_GPS), moreover GPS_fix output is set to high so the 1pps signal is carried out to the EK_MFR

in order to be used by other boards (1pps_out). The Sat variable located in the menu of the board

gives information about the number of the received satellites.

The 1pps can be also taken from two external sources (1pps_ext 1 and 1pps_ext_2) such as the 1pps

signal coming from another board. A detector (Det) checks the presence of the incoming external

1pps.

To select which signal to use as reference to synchronized the transmitter, a variable Ref can be set

by the menu (see 4.2).

It is essential to use 1pps signal locked to GPS internally or externally in order to assure SFN

synchronization.

Fig.1.8: GPS unit block scheme


2. BOARD PANEL

2.1 EK-DTX/2 BOARD PANEL

Fig.2.1: EK-DTX/2 board panel view

A) SFP Module Bay Site 1 (in the above image SFP module COAXIAL DIN1.0/2.3)

(*) GbE capability

B) SFP Module Bay Site 2 (in the above image SFP module COAXIAL DIN1.0/2.3)

C) RF Input connector (SMA Female)

D) RF Output connector (SMA Female)

E) GPS input connector



2.2 SFP MODULE

In the table below are listed the SFP modules supported by EK-DTX/2

CODE INTERFACE BYPASS MEDIA ASI SMPTE SDI GbE

(future option)

005-001772 COAXIAL

DIN

1.0/2.3 COPPER X

005-001451 COAXIAL

DIN

1.0/2.3 X COPPER X

005-001771 FIBER-OPT

LC X FIBER X

005-001770 RJ45 X COPPER X X X

005-001769 FIBER-OPT

LC X FIBER X X X

Table.2: EK-DTX/2 supported SFP module

Example of

005-001451 (SFP module with COAXIAL DIN1.0/2.3 connectors )

TX

Release

Mechanism

RX


3. EK-DTX/2 TECHNICAL SPECIFICATIONS

Transport Stream features

Inputs 2 SFP + 2 Internal

Input Stream Type ASI 188 Byte and 204 Byte terminated

Outputs 2 SFP + 2 Internal

ASI characteristics 1-216 Mbit/s, ISO/IEC 13818-1, EN 50083-9:2002

Internal Data-Rate 1-270 Mbit/s

Redundancy Input streams auto switch

Modulator features

DVB-T2

DVB-T2 Standard ETSI 302 755 v1.3.1 compliant

MFN/SFN (Relative emission time mode)

Multi PLP (only T2-MI mode)

SISO/MISO

Bandwidth 6, 7 and 8 MHz

Constellation Rotation

Parameters Setting from T2-MI content

fixed (front panel, web SNMP, MST)

RF features

Frequency

Output range (35|862 MHz)

Accuracy 6,5 x 10^-8 without GPS or external 1pps reference

Offset step 0.1 Hz

RF Output -10 +15 dBm (35|862 MHz)

RF Input -15 +15 dBm (470|862 MHz)

Pre-correction Manual (35|862 MHz)

Adaptive (470|862 MHz)

Clock References

Inputs 1 External Input for GPS signal

2 Internal Input for 1pps Reference signal

Output 1 Internal Output for 1pps Reference signal

GPS connector

Antenna supply Voltage = 5V

Max. allowed current = 50 mA

Input impedance = 75 Ohm

Connector = F FEMALE

Climatic conditions

Temperature - 5°C C

Humidity ax. %

Altitude 3000m 66kPa

Table.3: EK-DTX/2Technical specifications



4. BOARD MENU

4.1 EK-DTX/2 MENU STRUCTURE

The complete menu of the EK-DTX/2 board is depicted on end

Variable name Variable number

EK-DTX/2 1

>SFP 1 >>Tx1 DMA VC 3

>>Tx1 DMA Pid 4

>>Tx1 State 5

>>Rx1 DMA VC 6

>>Rx1 DMA Pid 7

>>Rx1 State 8

>SFP 2 >>Tx2 DMA VC 9

>>Tx2 DMA Pid 10

>>Tx2 State 11

>>Rx2 DMA VC 12

>>Rx2 DMA Pid 13

>>Rx2 State 14

>Internal >>Int1 DMA VC 15

>>Int1 DMA Pid 16

>>Int1 State 17

>>Int2 DMA VC 18

>>Int2 DMA Pid 19

>>Int2 State 20

>Tx Ports >>SFP Tx1 21

>>SFP Tx2 22

>>Int Tx1 23

>>Int Tx2 24


>Mod In

>>In1 25

>>In2 26

>>In3 27

>>Sel Mode 28

>>Alignment Src 29

>>Reversible 30

>>PAT Det 31

>>In1 State 32

>>In2 State 33

>>In3 State 34

>Modulator

>>State 35

>>Input Format 37

>>T2MI Pid 38

>>T2MIPiping 39

>>ISSY 40

>>NPD 41

>>Tx Id 42

>>L1 PRE

>>>Preamble 43

>>>Miso Group 44

>>>Carriers 45

>>>BWT Ext 46

>>>G/I 47

>>>L1 Mod 48

>>>Pilot Pattern 49

>>>Cell Id 50

>>>Network Id 51

>>>T2 System Id 52

>>>Num T2 Frames 53

>>>Num Data Symb 54

>>>Post Scramb 55

>>LI POST PLP

>>>Num PLP 56

>>>Detect Id 57

>>>Select Id 58

>>>Bit Rate 59

>>>Type 60

>>>Group Id 61

>>>Cod 62

>>>Mod 63

>>>Rot 64

>>>FEC 65

>>>Max Blocks 66

>>>TI Len 67



>>>TI Type 68

>>>Mode 69

>>>NPD 70

>>>ISSY 71

>RF Settings

>>Bw 72

>>Tx Freq 73

>>Freq Ofs 74

>>SFN

>>>Set Mode 75

>>>T2MI Mode 76

>>>Ofs Delay 77

>>>Dyn Delay 78

>>AGC

>>>RF Out 79

>>>Set Lev 80

>>>AGC Mode 81

>>>Max Lev 82

>>NL Precorrector

>>>Prec Mode 83

>>>Prec State 84

>>>RF In 85

>>>K1 87

>>>K2 88

>>>K3 89

>>>K4 90

>>>K5 91

>>>K6 92

>>>P1 93

>>>P2 94

>>>P3 95

>>>P4 96

>>>P5 97

>>>P6 98

>GPS

>>VCXO 99

>>Ref State 100

>>Sat 101

>>Latitude 102

>>Longitude 103

>>Altitude 104

>>Ref 105

>>GPS timeout 106

>>Board Temp 107


>License

>>Key LSB 111

>>Key MSB 112

>>DNA LSB 113

>>DNA MSB 114

>Revision

>>DSP 115

>>FPGA 116

>>CPLD 117

>>RamDisk 118

>>T2 119



4.2 EK-DTX/2 MENU DESCRIPTION AND KEYBOARD GUIDE

The content of each menu is here described. Each variable value can be set using the modifying

variable keys (EK-MFR/x manual, Board panel description) and to confirm the change pressing the

enter key.

>Stream Ports

>>SFP 1

This menu allows to characterize the behaviour of the SFP 1 connector (see Par.1.1).

>>>Tx1 DMA VC

Set the virtual channel (1 to 8) of the DMA section (see DMA unit) related to the

transmitter 1. When “Dis” is selected, virtual channels are disabled.

>>> Tx1 DMA Pid

Allows to associate a PID to the transport stream present on the DMA unit input.

(see DMA unit)

>>>Tx1 State

When no alarms occur, the display shows the transport stream bit rate (normal

working condition).

When an alarm occurs, there are different fault conditions:

Data Loss = when Tx1 DMA VC is enabled, this alarm occurs if it is present

on the input a transport stream packets without the selected DATA PID (see Tx1

DMA Pid).

VC err = when Tx1 DMA VC is enabled, this alarm occurs if it is present on the

input a transport stream packets with correct DATA PID but the content is not

related with the frame allowed by the EK-SFP/4, the same could happen with

corrupted transport stream.

>>>Rx1 DMA VC

Set the virtual channel (1 to 8) of the DMA section (see DMA unit) related to the

receiver 1.When “Dis” is selected, virtual channels are disabled.

>>> Rx1 DMA Pid

Allows to associate a PID to the transport stream present on the DMA unit input

(see DMA unit).

>>>Rx1 State


working condition).



No CD = The received transport stream carrier is missing.

Error = The transport stream is corrupted.

No Sync = The transport stream is unlocked (Sync byte missed or corrupted).

Data Loss = when Rx1 DMA VC is enabled, this alarm occurs if it is present on the

input a transport stream packets without the selected DATA PID (see Rx1 DMA Pid).

VC err = when Rx1 DMA VC is enabled, this alarm occurs if it is present on the input

a transport stream packets with correct DATA PID but the content is not related with

the frame allowed by the EK-SFP/4, the same could be happen with corrupted

transport stream.

>>SFP 2, This menu allows to characterize the behaviour of the SFP 2, The description of every

parameter of this menu are identical to the SFP 1 menu above reported.

>>Internal This menu allows to characterize the internal lines (Int 1, Int2) transport stream interface (see

Par.1.2 and 1.4).

>>Int1 DMA VC

Set the virtual channel (1 to 8) of the Internal 1 connection. When “Dis” is

selected, virtual channels are disabled (see DMA unit).

>> Int1 DMA Pid

Allows to associate a PID to the transport stream present on the DMA unit

input of the internal 1 line connection (see DMA unit).

>>Int1 State


working condition).

When an alarm occurs and the internal is used as receiver fault conditions can

be:

Error = The received transport stream is corrupted.

No Sync = The transport stream is unlocked (Sync byte missed or

corrupted).

Data Loss = when Int1 DMA VC is enabled, this alarm occurs if it is

present on the input a transport stream packets without the selected DATA

PID (see Int1 DMA Pid).

VC err = when Int1 DMA VC is enabled, this alarm occurs if it is

present on the input a transport stream packets with correct DATA PID but

the content is not related with the frame allowed by the EK-SFP/4, the

same could be happen with corrupted transport stream.

When an alarm occurs and the internal is used as transmitter fault conditions

can be:



Data Loss = when Int1 DMA VC is enabled, this alarm occurs if it is

present on the input a transport stream packets without the selected DATA

PID (see Int1 DMA Pid).

VC err = when Int1 DMA VC is enabled, this alarm occurs if it is

present on the input a transport stream packets with correct DATA PID but

the content is not related with the frame allowed by the EK-SFP/4, the

same could be happen with corrupted transport stream.

>>>Int2 :

The description of each parameter (Int2 DMA VC, Int2 DMA Pid, Int2

State) of this component are identical to the Int 1 menu above reported

>>Tx Ports A router implemented on the Tx Ports menu (see Par.1.6) allows to send on each

block the desired transport stream, that can be chosen from the list below:

None : No transport stream.

SFP Rx1 : TS present on the SFP1 interface receiver (see Par.1.1).


Int Rx1 : TS present on the Internal 1 interface receiver (see Par.1.2).


Mod In : TS present on the output of Mod In unit (see Par.1.5).

>>Mod In

This menu allows to characterize the seamless switch Mod In unit (see Par.1.5).

>>>In1

Allows to Disable (Dis) or enable and select the input 1 of the Mod In unit.




Int Rx2 : TS present on the Internal 2 interface receiver (see Par.1.2)

>>>In2 , In3

The In2 and the In3 variable descriptions are identical to the In1 above reported.

>>>Sel Mode

When the Auto mode is selected, the system automatically switches on the first

correct transport stream signal. The priority that the auto mode uses is: In1, In2, In3.

Moreover it is possible to select the output manually, without any relation with the

inputs status.


>>>Alignment Src

When the Mod In unit works in Auto mode (see Sel Mode), the Alignment search, if

it is enabled, allows to obtain a temporal alignment of the inputs to the selected

output, so if a switch occurs, the output transport stream doesn’t suffer corruption

about content and timing (seamless switching).

>>>Reversible

Allows to enable (Y) or Disable (N) the reversibility option of the Mod In unit (see

Par.1.5).

>>>PAT Det

Allows to enable or disable the PAT detector, that checks PAT presence in the input

transport streams for the automatic switch control. If it is enabled and PAT is

missing an alarm occurs in In-n State.

>>>In1 State

Indicates the status of the input 1 of the Mod In unit during normal working

condition, there are two possible state:

OnAir = The received transport stream is valid and send to the switch

output.

Ok = The received transport stream is valid and ready for switching.

There are different alarm condition that may occur, which are showed

below:

Err = The received transport stream is corrupted.

PAT = The received transport stream PAT is missing (it occurs only if

PAT Det is set to ”En” ).

Alig = the switch core can not temporally align the input stream to the

one sent to the switch output in that moment (it occurs only if

Alignment Src is set to ”Y” ).

Dis = input disabled by menu.

>>>In2 State, In3 State

The In2 State and the In3 State variable descriptions are identical to the In1

State above reported.



>Modulator >>State

When it is OK the board is in normal working condition. If an alarm occurs,

the State returns the variable in alarm.

There are different alarm condition that may occur, which are showed below:

No License = License missing or License check failed (please check if

License Key is corrected or contact Eurotek technical support).

Anti-Theft = Anti-theft system check failed (please verify Anti-theft

settings using MST software or contact Eurotek technical support).

Booting = Modulator is starting after a reboot.

RF Lev = AGC not locked.

Fifo Full = input FIFO memory is full, probable source of this alarm is

an bitrate excess at the modulator input.

Input Error = The received transport stream is corrupted.

When T2MI format is enabled there are different alarm condition that may

occur, which are showed below:

No Input = The received transport stream is missing.

T2 MI Unsup = T2-MI frame type not supported by modulator.

T2 MI CRC 32= error in T2-MI frame CRC32.

T2 MI Err = error in T2-MI stream.

T2 MI Abs= received T2-MI supports Absolute emission time, only

Relative time is supported by EK-DTX/2 [1, 10]..

>>Input Format

Set the transport stream standard for the modulator input.

TS: Transport stream

T2 MI: T2-MI stream

>>T2MI Pid

PID for the MPEG-2 TS packet data piping.

>>T2MI Piping

Allows to enable/disable the signal for a PID to MPEG-2 TS packet data

piping

>>Tx Id

Allows the user to set the Tx Identifier number for the transmitter.


>>L1 PRE >>>Preamble

Allows to set the Preamble format (SISO or MISO) [1, 10].

When T2-MI format is enabled, this variable shows the Preamble

format of the received T2-MI stream.

>>>Miso Group

Allows to set the Miso Group format (1 or 2) [1, 10].

When T2-MI format is enabled, this variable shows the Miso Group of

the received T2-MI stream.

If Individual Addressing is configured in T2 Gateway and the

modulator Tx Id is defined in the received T2MI stream, this variable

shows the Miso Group for this modulator.

>>>Carriers

This menu allows to set the numbers of the carriers for the DVB-T2 [1,

10]. It is possible to set 1K, 2K, 4K, 8K, 16K or 32K carriers from the

board menu.

When T2-MI format is enabled, this variable shows the numbers of the

carriers of the received T2-MI stream.

>>>BWT Ext

Allow to enable/disable the extended carrier mode [1, 10].

When T2-MI format is enabled, this variable shows if extended carrier

mode is used in the received T2-MI stream.

>>>G/I

This menu allows to set the coding of L1–post signalling data block [1,

10]. It is possible to set:1/32, 1/16, 1/8, 1/4, 1/128, 19/128, 19/256.

When T2-MI format is enabled, this variable shows the coding of the

received T2-MI stream.

>>>L1 Mod

This menu allows to set the constellation of L1–post signalling data

block [1, 10]. It is possible to set BPSK, QPSK, 16QAM, 64QAM.

When T2-MI format is enabled, this variable shows the constellation of


>>>Pilot Pattern

This menu allows to set the scattered pilot used for the data OFDM

symbols [1, 10]. It is possible to set value from PP1 to PP8.

When T2-MI format is enabled, this variable shows the scattered pilot

of the received T2-MI stream.



>>>Cell Id

This menu allows to set the Cell Id for the DVB-T2 network [1, 10]. It

is possible to set value from 0 to 65535.

When T2-MI format is enabled, this variable shows the Cell Id of the


If Individual Addressing is configured in T2 Gateway and the

modulator Tx Id is defined in the received T2MI stream, this variable

shows the Cell Id for this modulator.

>>>Network Id

This menu allows to set the Network Id for the DVB-T2 network [1,

10]. It is possible to set value from 0 to 65535.

When T2-MI format is enabled, this variable shows the Network Id of


>>>T2 System Id

This menu allows to set the System Id for the DVB-T2 network [1, 10].

It is possible to set value from 0 to 65535.

When T2-MI format is enabled, this variable shows the System Id of


>>>Num T2 Frames

This menu allows to set the number of T2-frames per super frame [1,

10]. It is possible to set value from 2 to 255.

When T2-MI format is enabled, this variable shows the number of T2-

frames per super frame of the received T2-MI stream.

>>>Num Data Symb

This menu allows to set the number of data OFDM symbols per

T2-frame, excluding P1 and P2 [1, 10]. It is possible to set value from 1

to 4095.

When T2-MI format is enabled, this variable shows the number of data

OFDM symbols per T2-frame of the received T2-MI stream.

>>>Post Scramb

Allow to decide if the L1_POST signalling is scrambled.

When T2-MI format is enabled, this variable shows if the L1_POST

signalling is scrambled in the received T2-MI stream.


>>L1 POST PLP

>>>Num PLP

This variable shows the number of PLPs carried within the current

super-frame [1, 10]. If TS format is enabled only one PLPs can be

carried.

>>>Detect Id

When T2-MI format is enabled this variable shows the PLP Id detected

in the received T2-MI stream [1, 10].

>>>Select Id

If TS format is enabled, this variable set the PLP Id carried [1, 10].

If T2-MI format is enabled, this variable select the PLP Id of which

associated parameters have to be shown: Bit rate , ISSY, NPD, Type,

Group Id, Cod, Mod, Rot, FEC, Max Blocks, TI Len, TI Type, Mode.

>>>Bit rate

When no alarms occur, the display shows the bit rate of the associated

PLP (normal working condition).

When T2-MI format is enabled, this variable shows the bit rate of the

associated PLP selected in Select Id.

>>>Type

This menu allows to set the type of the associated PLP (Common,

Data PLP type 1, Data PLP Type 2) [1, 10].

When T2-MI format is enabled, this variable shows the type of the

associated PLP selected in Select Id.

>>>Group Id

This menu allows to set the Group Id within the current PLP is

associated [1, 10]. It is possible to set value from 0 to 255.

When T2-MI format is enabled, this variable shows the Group Id

within the PLP selected in Select Id is associated.

>>>Cod

This menu allows to set the code rate used by the associated PLP [1,

10]. It is possible to set: 1/2, 3/5, 2/3, 3/4, 4/5, 5/6.

When T2-MI format is enabled, this variable shows the code rate used

by the PLP selected in Select Id.

>>>Mod

This menu allows to set the modulation used by the associated PLP [1,

10]. It is possible to set: QPSK, 16-QAM, 64-QAM, 256-QAM.

When T2-MI format is enabled, this variable shows the modulation

used by the PLP selected in Select Id.



>>>Rot

This menu allows to enable constellation rotation for the associated

PLP [1, 10].

When T2-MI format is enabled, this variable shows if constellation

rotation is used by the PLP selected in Select Id.

>>>FEC

This menu allows to set the FEC type used by the associated PLP. It is

possible to set: 16K or 64 K LPDC [1, 10].

When T2-MI format is enabled, this variable shows the FEC type used


>>>Max Blocks

This menu allows to set the maximum value of

PLP_NUM_BLOCKS (number of FEC blocks contained in the current

Interleaving Frame) for the current PLP [1, 10]. It is possible to set

value from 0 to 1023.

When T2-MI format is enabled, this variable shows the maximum

value of PLP_NUM_BLOCKS for the PLP selected in Select Id.

>>>TI Len

This menu allows to set the TIME_IL_LENGTH for the current

PLP [1, 10]. It is possible to set value from 0 to 255.

If the TI Type is set to the value “Multiple”, this field shall

indicate PI, the number of T2-frames to which each

Interleaving Frame is mapped, and there shall be one TI-block

per Interleaving Frame (NTI=1).

If the TI Type is set to the value “Single”, this field shall

indicate NTI, the number of TI-blocks per Interleaving Frame,

and there shall be one Interleaving Frame per T2-frame (PI=1).

If there is one TI-block per Interleaving Frame and one T2-frame per

Interleaving Frame, TIME_IL_LENGTH shall be set to the value '1'

and TI Type shall be set to “Single”. If time interleaving is not used for

the associated PLP, the TIME_IL_LENGTH-field shall be set to the

value '0' and TI Type shall be set to “Single”.

When T2-MI format is enabled, this variable shows the

TIME_IL_LENGTH for the PLP selected in Select Id.

>>>TI Type

This menu allows to set the TIME_IL_TYPE used by the associated

PLP [1, 10]. It is possible to set: Single or Multiple.

“Single” indicates that one Interleaving Frame corresponds to one T2-

frame and contains one or more TI-blocks.

“Multiple” indicates that one Interleaving Frame is carried in more than

one T2-frame and contains only one TI-block.

When T2-MI format is enabled, this variable shows the FEC type used



>>>Mode

This menu allows to set the mode used for the current PLP [1, 10]. It is

possible to set: Normal (Normal Mode) or High Eff (High Efficiency Mode).

When T2-MI format is enabled, this variable shows the mode of the associated

PLP selected in Select Id.

>>>NPD

Allow to enable/disable Null Packet Deletion [1, 10].

When T2-MI format is enabled, this variable shows the NPD of the PLP chosen in

Select Id.

>>>ISSY

Allows to enable/disable the ISSY [1, 10].

When T2-MI format is enabled, this variable shows the ISSY of the PLP chosen in

Select Id.

>RF Settings

>>Bw

This variable set the spectrum bandwidth of the DVB-T2 modulator [1, 10]. It is

possible to customize the bandwidth to select three different values: 6MHz, 7MHz and

8MHz.

When T2-MI format is enabled, this variable shows the bandwidth associated to the


>>Tx Freq

Allows to set the transmission frequency of the DVB-T2 modulator (35862 MHz).

>>Freq Ofs

Allows to set the frequency offset of the DVB-T2 modulator with a resolution of 0.1

Hz.

When T2-MI format is enabled, if Individual Addressing is configured in T2 Gateway

and the modulator Tx Id is defined in the received T2MI stream, this variable shows

the Frequency offset for this modulator.

>>SFN

>>>Set Mode

When is SFN the EK-DTX/2 is in SFN modality, if it is MFN the board works

in MFN modality [1, 10].

When T2MI is selected, the modality is regulated by T2MI stream

configuration (see T2MI mode field).

SFN mode is supported only when T2-MI format is enabled.

>>>T2MI Mode

When T2-MI format is enabled this variable shows if SFN is enabled in the




>>>Ofs Delay

Allows to set the local time offset delay for the transmitter [μsec].

When T2-MI format is enabled, if Individual Addressing is configured in T2

Gateway and the modulator Tx Id is defined in the received T2MI stream, this

variable shows the time offset delay for this modulator.

>>>Dyn Delay

Show the network delay margin, it means how much the latency of the network

can be increased before to have the service unavailability. Please take in

account the possibility to have latency fluctuation.

>>AGC

>>>RF Out

Shows the actual output power EK-DTX/2 level (dBm) on RF Out connector.

>>>Set Lev

Allows to set the target level (dBm) of AGC algorithm.

When AGC Mode is set to Int, AGC algorithm regulates power to get RF Out

value equal to Set Lev.

When AGC Mode is set to Ext AGC algorithm regulates power to get RF In value

equal to Set Lev.

>>>AGC Mode

Set the AGC modality:

Freeze = the AGC control is stuck.

Int = the AGC control is enabled (RF Out field is used to control power loop).

Ext = the AGC control is enabled (RF In field is used to control power loop), see

Annex A for more details.

Attention: only when Prec Mode is set to “Adaptive” this mode can be

enabled

RF Off = the transmitter is turned off.

>>>Max Lev

Maximum power level (dBm) that the EK-DTX/2 can carry out on RF Out

connector (i.e. RF Out field can not exceed Max Lev value).


>>NL Precorrector

>>>Prec Mode

Set the NL precorrector modality:

Disabled = the precorrection is turned off.

Manual = Manual precorrector is enabled, the user can use K1-P6 parameters

in order to adjust the correction.

Adaptive = Adaptive precorrector is enabled. RF In signal is used as feedback

in order to control the precorrection.

>>>Prec State

When Prec Mode is set to “Disabled” this variable displays “Dis”.

When Prec Mode is set to “Manual” this variable displays “Man mode”.

When Prec Mode is set to “Adaptive” this variable displays “TRACK” in normal

working condition, it means that Adaptive correction is enabled and it is

compensating for the non-linearity of the power amplifier.

There are different alarm conditions that may occur when Adaptive mode is

enabled, they are showed below:

RF Lev = AGC is adjusting the EK-DTX/2 output power level, so

correction is automatically disabled until output power will reach set

level.

Freq = transmitting frequency (set in Tx Freq) is out of the range 470 –

862 MHz, where the adaptive precorrector is able to work.

Init =Adaptive precorrector is initialised.

Error = Adaptive precorrector communication error.

FB Error = No correction, check if feedback signal is correctly connected to

RF In connector and input power level is in the range -15dBm.

>>>RF In

When Prec Mode is set to “Adaptive” this variable shows the actual input power

level (dBm) at the RF In connector.

>>>K1 to K6

When Prec Mode is set to “Manual” these coefficients are used for the non-linear

amplitude amplifier predistortion.

>>>P1 to P6

When Prec Mode is set to “Manual” these coefficients are used for the non-linear

phase amplifier predistortion.



>GPS This menu allows to characterize the GPS unit (see Par.1.7).

>>VCXO

Indicates the value of correction applied to the High stability internal Voltage

controlled crystal oscillator, the value is in the range –1 / +1, more close is to

the limits more probable is an unlock, value in the range –0.5/+0.5 are in the

normal range. The alarm label “Ref Unlocked” appears when the Reference

1pps signal is not locked.

>>Ref State

Indicates the status of transmitter synchronization to a reference signal, in

according with the value set in the variable Ref .


No GPS Ref = The GPS reference signal is missing.

No Ext Ref = The Ext reference signal is missing.

No Refs = Both GPS and Ext reference signals are missing.

>>Sat

Returns the number of the satellites received by the GPS receiver module that

should be more than 6.

>> Latitude, Longitude, Altitude,

Latitude, Longitude and Altitude are the geographic coordinate of the satellite.

These fields are useful to set Anti-theft feature (please see MST software user

manual).

>>Ref

The source of the 1pps reference used to synchronize the board internal clocks.

This reference can be a 1pps signal (GPS) generated by the GPS Receiver of

the board, an external 1pps reference (Ext) coming for example from another

board, or an internal reference (Int) unrelated from 1pps signal.

When “Auto” is selected, the system automatically selects the 1 pps source to

process in according to the following priority: GPS, Ext, Int.

>>GPS timeout

When Ref is selected on GPS and for some reason the GPS signal is loss the

user can decided the time after which the transmitter is turned off.

>>Board Temp This variable reports the EK-DTX/2 temperature (°C).


>License Gives information about the license key.

>>Key LSB

License Key (LSB Part), it can be managed using Eurotek MST software

>>Key MSB

License Key (MSB Part), it can be managed using Eurotek MST software

>>DNA LSB

Board Serial Number (LSB Part)

>>DNA MSB

Board Serial Number (MSB Part)

>Revision Gives information about the software releases.

>>DSP

DSP software release.

>>FPGA

FPGA software release.

>>CPLD

CPLD software release.

>>RamDisk

RamDisk software release.

>>T2

DVB-T2 release



4.3 EK-DTX/2 VARIABLES SETTING EXAMPLE

The hereafter example explains how to change the DMA unit virtual channel of the SFP 1 transmitter

connector Tx1 DMA VC. The procedure to set this parameter is valid for all board setting.

EK-DTX/2 board is inserted in the EK-MFR/x slot number two. Pressing the Explorer menu keys go

to the slot 2 page.

Pushing the “enter” key (EK-MFR/x manual, board panel description), the user can enter on the EK-

DTX/2 menu (par 4.2). The display shows the first menu of the board (SFP 1)

Using the explore menu keys, it is possible to see every of the several main menu of the board:

The Tx1 DMA VC variable is located in the SFP1 menu, so pressing the enter key we obtain


The DMA VC is disabled (Dis). To change this parameter is necessary pushing the enter key. The

variable value flash and using the modify variable keys it is possible to set the vitual channel 3, for

example. When the value is displayed, pressing the enter key it is possible to confirm the change (as

the next figure shows). If the Esc key is pressed the display returns the previous value.



5. REMOTE CONTROL

The board can be controlled using two different ways:

Eurotek MST, an application that permits to manage and monitor all the board

functionalities (Parameter settings, Internal connections, Log analysis, Software

upgrade, etc…), for more information see the Eurotek MST user manual.

Web Pages, using a standard web browser it is possible to see the web pages showing

all the board parameters (see EK-MFR/2 user manual, web interface chapter), with

limited functionalities respect to the Eurotek MST.


ANNEX A - AGC SETTING PROCEDURE

In order to control the power level and to avoid damage to the external amplifier it is very important

to follow this procedure:

1) Assure that the amplifier module is correctly connected to the antenna and turned off.

2) Switch on the EK-MFR/2 and set the EK-DTX/2 board fields as follow:

Set Lev = -10.0 dBm

AGC Mode = RF Off

Max Lev = 10.0 dBm

3) Connect the EK-DTX/2 board to the external amplifier module:

The EK-DTX/2 SMA RF Out connector to the RF input of the amplifier

The EK-DTX/2 SMA RF In connector to the monitory output of the amplifier

4) Turn on the amplifier.

5) Set the AGC Mode parameter to Int value.

6) Adjust the Set Lev parameter to obtain, on the output of the amplifier the desired power value.

7) Read RF Out and RF In fields and note these two values.

8) Set the AGC Mode parameter to RF Off value.



10) Set Set Lev value equal to RF In value (detected on the point 7).

11) Set Max Lev value equal to RF Out value (detected on the point 7) + 2 dBm.

12) Set the Mode parameter to “Ext”.

13) Wait until the AGC is correctly regulated (RF In = Set Lev).

The EK-DTX/2 board driving correctly the amplifier, the power out is constant maintained.


Eurotek S.r.l. c/o Parco Scientifico Tecnologico e delle

Telecomunicazioni in Valle Scrivia

Strada Comunale Savonesa, 9

15057 RIVALTA SCRIVIA (AL)

ITALY

tel. +39 (0)131 860205 r.a. fax +39 (0)131 860993

http://www.eurotektel.com

e-mail: [email protected]

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