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COBHAM OMU I User Manual
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OPTICAL M
ASTER UNIT
MARK I
PRODUC
T
DESCRIPTION AND
USER’S MANUAL
Cobham Wireless
–
Coverag
e
Date:
4-
Jan
-
18
www
.cobham.com/wirel
ess
Document number:
A1829300
UM
Rev. 3.1
Page |
42
3.12.2
OMU Signal So
urce pro
vided by Repeater
3. E
xample of a site insta
llation where the FR
signal to the OMU is tapped o
ff a repea
ter
Power U
nit for
-
48 V DC
ODF
ODF
Fiber Fed
Repeater
Modem
AEM
Back
-
up Bat
ter
y
optional
Coupler
Donor
Ant
enna
Server Ante
nna
Channel
Sel
ective
Repeater
Antenna or
Leaky feeder
47
49
Table of Contents
Default Chapter
5
Table of Contents
5
1 Introduction
7
Features
8
Models and Ordering Information
8
OMU Installation Configurations
9
Single OMU Topology
9
Cascading Omus
10
Expansion Using Multi-Color Laser System
10
OMU Modules
11
WDM Fibre Optic Converter
12
UL Combiner and DL Splitter
12
6-Way UL/DL RF Simplex Interface Cards
13
Control Module
13
External Alarm and Battery Module
14
Modem Unit
14
Modem Antenna
15
Rack Communication Board
15
Power Supplies
15
Rear Panel
16
2 Installation
17
Unpacking
17
Mounting in Rack
17
Grounding
17
Connections
18
Single Sector RF Connections
18
Configuration at Delivery Is Alternative 1
19
Fibre Optic Connections
19
Connections for Cascaded OMU Units
20
External Alarm and Relay Connections
21
Modem Connections
22
Connecting Power and Power-Up
23
OMU Module Configuration Examples
24
3 Setup
26
Initiate Local Communication
26
RMC Communication
26
Configure the OMU
27
Set OMU Name (TAG)
27
Fiber Loss Compensation and Master Attenuation
27
External Alarms
28
Relay
29
Integration into AEM
29
Set up OMU-Repeater System
30
Balance the System
31
Downlink Path
31
Fiber Loss Compensation
32
Uplink Path
33
Noise Considerations
33
Initiate Fibre Loss Compensation
33
Set up Remote Communication
36
Communication Via Modem
36
Communication Via Wireless Modem
37
Communication Via PSTN (Fixed) Modem
40
Communication Via TCP/IP and Ethernet
41
Troubleshooting Remote Communication
41
Integrate into the AEM
47
Installation Examples
47
OMU Signal Tapped at BTS
47
OMU Signal Source Provided by Repeater
48
Multi-Sector Configurations - up to Six Sectors
49
Changing UL Combiner and DL Splitter Connections
50
4 Troubleshooting
51
Module Leds
51
WDM Module Leds
51
Control Module Leds
52
GSM Modem Behaviour
53
5 Maintenance
54
General
54
Preventive Maintenance
54
Product Disposal
54
Appendix A: Specifications
55
Appendix B: F/O Cleaning Procedure
56
Appendix C: EU Declaration of Conformity
60
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COBHAM OMU I Specifications
General
Brand
COBHAM
Model
OMU I
Category
Network Hardware
Language
English
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