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IRT DDA-4280 Скачать руководство пользователя страница 2

4280-dda.ib.rev0.doc

Page 2 of 17

11/03/2009

IRT Eurocard

Type DDA-4280

2.048 Mbps (E1) G.703

Data Distribution Amplifier

Instruction Book

Table of Contents

Section

Page

Operational Safety

2

General Description

3

Functional Diagrams

4

Technical Specifications

5

ZDA-4300RH Technical Specifications

6

Electrical characteristic of ITU-T G.703 2.048 Mb/s (E1) signal

6

Coding characteristic of ITU-T G.703 2.048 Mb/s (E1) signal

7

G.703 data signal format

7

Configuration

8

Installation

9

SMU-4000 Installation

11

Figure 1: SMU-4000 module

11

Front and rear layouts

12

Operation

13

SNMP – What Is It?

14

DDA-4280 SNMP Functions

16

Maintenance & Storage

17

Warranty & Service

17

Equipment return

17

This instruction book applies to units later than S/N 0901001.

Operational Safety:

WARNING

Operation of electronic equipment involves the use of voltages and currents that may
be dangerous to human life. Note that under certain conditions dangerous potentials
may exist in some circuits when power controls are in the

OFF

position.

Maintenance personnel should observe all safety regulations.

Do not make any adjustments inside equipment with power

ON

unless proper

precautions are observed. All internal adjustments should only be made by suitably
qualified personnel. All operational adjustments are available externally without the
need for removing covers or use of extender cards.

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Содержание DDA-4280

Страница 1: ...manufactured in Australia IRT can be found on the Internet at http www irtelectronics com I R T Electronics Pty Ltd A B N 35 000 832 575 26 Hotham Parade ARTARMON N S W 2064 AUSTRALIA National Phone...

Страница 2: ...at Is It 14 DDA 4280 SNMP Functions 16 Maintenance Storage 17 Warranty Service 17 Equipment return 17 This instruction book applies to units later than S N 0901001 Operational Safety WARNING Operation...

Страница 3: ...by Changeover inhibit and changeover request switches are provided on the front panel for use where modules are linked in pairs for redundancy For this configuration the double width rear assembly is...

Страница 4: ...Y RL1 2 RELAY RL5 2 RL2 1 RL2 1 RL3 RL3 Output Driver FPGA E1Generator Change over logic AIS Detector INPUT SK5 RL1 2 OUTPUTS SK4 Data Reg with Jitter Att MON SK2 Block diagram DDA 4280 Signal path SK...

Страница 5: ...has failed General alarm Contact to open circuit if Data Loss is detected OR AIS is detected Connectors Data BNC Alarm Krone LSA plus Indicators Data loss AIS detect Module in service Module in standb...

Страница 6: ...using the failed path DDA to become Standby This implies that when the failed path is restored that it will remain as Standby and not become Main unless either a failure of Main occurs or a manual cha...

Страница 7: ...signal at various points in the DDA when in operation They are not intended as accurate portrayals of either voltage levels or timing It can be seen that the original signal has both positive and nega...

Страница 8: ...F Disable switching on AIS input when used in handshaking mode ON Enable switching on AIS input when used in handshaking mode SW4 5 Not used SW4 6 Not used SW4 7 Not used SW4 8 Not used NOTE AIS stand...

Страница 9: ...e is connected to earth for safety reasons See frame manual for details Signal earth For safety reasons a connection is made between signal earth and chassis earth No attempt should be made to break t...

Страница 10: ...s reflection problems with G 703 signals causing data errors In general cable runs should be kept as short as possible and should not exceed 200 metres for reliable error free operation Handshake alar...

Страница 11: ...up with the three sets of multipin sockets on the main PCB module Align all pins and then gently press the SMU 4000 all the way down into place If the SMU 4000 is not already programmed with the corr...

Страница 12: ...order and approximate layout only 1 2 3 4 OUTPUT 4 INPUT PL4 SK 13 SK 4 SK 9 SK 8 SK 6 OUTPUT 2 OUTPUT 3 OUTPUT 1 PL5 SK 5 N140 MON ALLOW INHIBIT REQUEST AIS STANDBY CHANGE DATA LOSS MAIN DDA 4280 ZDA...

Страница 13: ...front panels of the units are set to Change Allow and not Change Inhibit Automatic switching parameters are set by a loss of input condition and switch SW3 settings as described in the Configuration s...

Страница 14: ...that information into a form compatible with SNMP The agent therefore acts as an interface between the NMS and the managed devices The NMS sends a request message and control commands for the managed...

Страница 15: ...MP compatible need a plug in SMU 4000 module with a program relevant to the module that it is plugged into Depending on the module besides the module identification parameters such as alarm states inp...

Страница 16: ...4280 dda ib rev0 doc Page 16 of 17 11 03 2009 DDA 4280 SNMP Functions At the time of writing this manual SNMP functions were still to be written for the DDA 4280 Contact IRT for update of status...

Страница 17: ...extended by IRT only to the extent obtainable from the component supplier Equipment return Before arranging service ensure that the fault is in the unit to be serviced and not in associated equipment...

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