SGT-LP Series

PDH

Microwave

Radio

Technical

Overview

1

System

Overview

3

Transmission Capacity:

4 x 2.048 Mb/s (4E1),

8 x 2.048 Mb/s (8E1),

16 x 2.048 Mb/s (16E1),

1 x 34 Mb/s (E3),

Fast Ethernet+1/2/4E1 (14MHz or 28MHz)

Operating Mode:

1+0

1+1 Hot standby system

Service Channels:

2 auxiliary data channels:

A phone channel: engineering order wire

Network management channel: RS232, 10Base-T

SGT-LP System Description

4

Local Terminal Remote Terminal

SNMPc NMS

Indoor Unit (IDU)

Outdoor Unit (ODU)

Antenna

Cable Indoor Unit (IDU)

Cable

Antenna

Outdoor Unit (ODU)

Tributary Tributary

Microwave Link

SGT-LP System Description Microwave Link

5

High performance and integrated design incorporating high & new technology

Easy-to-install

Single coaxial cable connection between Indoor and Outdoor Units

Adjustable transmit output power

Frequency/channel setting via LCD panel or NMS

Diagnostic loopbacks accessible via LCD panel or NMS

253 different Device ID codes (same as last number of IP address)

One Base Unit supports all different service cards, such as E3 card, 4E1 card, 8E1 card, 16E1 card, 2/4E1+FE card

Software scalable capacity

Auxiliary Alarm input and Relays output

Features

6

Digital Modulator and Demodulator, Forward-Error-Correction (FEC)

High sensitivity and High System Gain

Low power consumption, using 3.3V and 1.5V working voltages

Standard radio IF frequencies on the cable: 310MHz/70MHz

No cable length settings or adjustments required, RG-8/U cable up to 300m

Protection Switch Option available

SNMP (NMI) Option available

WEB Server supported for network management

Features

8

SGT-LP IDU

9

IDU Features

1 Rack Unit (RU) high, 19” wide

4 external alarm input sensors as standard

5 alarm relay outputs as standard

Control and diagnostics features through front panel keypad:

· Transmission Capacity select

· Frequency of operation

· Transmitter Power adjustment

· Device ID · Tributary status

· Transmitter On/Off · ATPC

· Beep and Light Alarm

· RSSI

· Current BER

· Alarm summary status

· Transmitter Power Status

· Auto Locate Alarm and display

10

IDU Features

The same Base Unit supports all of the following service cards

TRIBS-B TRIBS-A

4/8/16E1(75ohm unbalanced)

LINK LTXRX

RATE WTXRX

10/100BASE-T

TRIBS

IN OUT A 1

B 1

2 3

3 4

4

2

C 1

D 1

2 3

3 4

4

LINK LTXRX

RATE WTXRX

10/100BASE-T

TRIBS

1 2 3 4

FE+1/2/4E1 (75ohm unbalanced)

1E3 (75ohm unbalanced) 4/8/16E1 (120ohm balanced)

10/100BASE-T+1/2/4E1 (120ohm balanced)

11

IDU Overview

DC IN

V.11

V.24

Alarm

Relays

Phone

Service

Card

Switch

TO ODU Keypad

LED

Indicators

LCD

Grounding

10BASE-T

RS232

12

4/8/16E1 Service Card

TRIBS-B TRIBS-A

Capacity Configuration: 4E1, 8E1, 16E1

According to 7MHz, 14MHz, 28MHz Bandwidth

A 1

B 1

2 3

3 4

4

2

C 1

D 1

2 3

3 4

4

13

4/8/16E1 Service Card

Digital Interface: ITU-T Rec. G.703

Connectors:

RJ-48 Connector for 120 Ohm balanced

DB37 Connector for 75 Ohm unbalanced

For DB37 CC4 Coaxial Connector Adaptor supported

Digital Code: HDB3

14

FE+1/2/4E1 Service Card

LINK LTXRX

RATE WTXRX

10/100BASE-T

TRIBS

LINK LTXRX

RATE WTXRX

10/100BASE-T

TRIBS

1 2 3 4

Capacity Configuration: 14MHz, 28MHz

Service Configuration: 1E1,2E1,4E1

15

FE+1/2/4E1 Service Card

Capacity: 34Mbps @28MHz bandwidth 17Mbps @14MHz

bandwidth

Digital Interface E1: ITU-T Rec. G.703

Digital Interface 10/100BASE-T: IEEE 802.3

Connectors:

10/100BASE-T: RJ45 100 Ohm unbalanced

E1:RJ-48 Connector for 120 Ohm balanced

E1:DB37 Connector for 75 Ohm unbalanced

For DB37 CC4 Coaxial Connector Adaptor supported

Digital Code: E1:HDB3

16

1E3 Service Card

IN OUT

Capacity Configuration: 1E3

According to 28MHz Bandwidth

Digital Interface :ITU-T Rec. G.703

Connectors: BNC for 75 Ohm unbalanced

Digital Code: HDB3

17

PCB IN IDU

IDU Main Board Service Card

IDU

LCD&Key

Board

18

Licensed PDH

Outdoor Unit

(ODU)

19

SGT-LP ODU

20

ODU Frequency Range

• ODU covers all of the standard frequency bands

specified in ITU-R

• ITU-R frequency bands are achieved using

Sub-bands in the ODU’s

• The standard frequency bands are 1. 5 GHz band

4.4-5.0GHz As per ITU-R F.1093-3

2. Lower 6 GHz band

5.9-6.4GHz As per ITU-R F.383-6

3. Upper 6 GHz band

6.4-7.1 GHz As per ITU-R F.384-7

4. 7 GHz band

7.1-8.2GHz As per ITU-R F.385-6

21

ODU Frequency Range

5. 8 GHz band

8.2-8.5GHz As per ITU-R F.386-6

6. 13 GHz band

12.7-13.3GHz As per ITU-R F.497-6

7. 15 GHz band

14.4-15.4GHz As per ITU-R F.636-3

All the frequency bands are covered using standard TR spacings

22

ODU Specification

General Specification

Frequency Source / Stability Synthesizer ± 5 ppm

RF Channel Selection IDU controlled via NMS

Modulation Type QPSK

Receiver Type Dual conversion

Intermediate Frequency 310MHz / 70MHz

Transmitter

Output Power Up to +25dBm

Attenuation Control Range 20dB

Receiver

Noise Figure < 4.0 dB

Overload -20 dBm

Receiver Sensitivity (1E-6 BER) -87dBm/4E1, -84dBm/8E1, -81dBm/16E1

System Gain Up to 112dB

Dimension / Weight 300 x 260 x 56 mm^3 / 6Kg

Temperature / Humidity -33 ~ +55C, / 0% ~ 100%

Power Supply / consumption -40 VAC to -60 VAC / 39W

23

Power Output

PDH

– 5/6/7 GHz: 26 dBm

– 8/11 GHz: 24 dBm

– 13/15 GHz: 23 dBm

24

Interfaces

IF Cable

– N(F) Cable interface

Received Signal Strength Indicator (RSSI)

– Analog test point indicating voltage (0-5V) proportional to received power in dBm

– Uncalibrated but monotonic: a weaker signal will always result in a lower voltage, and vice-versa. High voltage (4.5V-5V) approx. corresponds to -25dBm

Low voltage (0.5V-1V) approx corresponds -80dBm or lower

– Connector: BNC female

25

Antenna Interface

Low frequencies (11GHz and lower)

– Coaxial interface (any antenna may be used)

– Connector: N-type jack

High frequencies (13GHz and above)

– Either Waveguide (any antenna may be used)

Direct mount (antenna needs to mechanically integrate with ODU)

– Connector: proprietary flange

(flange adaptor available from supplier)

26

SGT-LP

Network Management System

27

NMS-Structure

HUB

28

NMS-SNMPc

30

Protection System

-Hot Standby

-Frequency Diversity

-2+0

-Space Diversity

31

Protection Systems

Unprotected system

Protected system/Single Antenna

Protected system/Double Antenna

32

Protection Switch

V11 Connect

to IDU-A

Connect to

IDU-B

Connect to

IDU-A

Phone

Connect to

IDU-A

Phone

Connect to

IDU-B

V24 Connect

to IDU-A

V11 Connect

to IDU-A

V24 Connect

to IDU-A

33

Protection

Connection card

Connection card

34

Switching Conditions

Item Condition Switching Function Activated

1 Loss of lock on transmit signal Transmit

2 Loss of transmit power Transmit

3 Frame loss (receive) Receive

4 BER Alarm Receive (hitless)

5 DC Power Loss Transmit and receive

6 Cable Fault Transmit and receive

7 Low receive level Receive (hitless)