OPTICAL MASTER UNIT MARK I
PRODUCT DESCRIPTION AND USER’S MANUAL
Cobham Wireless – Coverage Date: 4-Jan-18 www.cobham.com/wireless
Document number: A1829300UM Rev. 3.1
Page | V
Table of Contents
1 Introduction .................................................................................................................................... 1
1.1 Features .................................................................................................................................. 2
1.2 Models and Ordering Information ............................................................................................ 2
1.3 OMU Installation Configurations .............................................................................................. 3
1.3.1 Single OMU Topology ............................................................................................... 3
1.3.2 Cascading OMUs ...................................................................................................... 4
1.3.3 Expansion using Multi-color Laser System ............................................................... 4
1.4 OMU Modules .......................................................................................................................... 5
1.4.1 WDM Fibre Optic Converter ...................................................................................... 6
1.4.2 UL Combiner and DL Splitter .................................................................................... 6
1.4.3 6-Way UL/DL RF Simplex Interface Cards ............................................................... 7
1.4.4 Control Module .......................................................................................................... 7
1.4.5 External Alarm and Battery Module........................................................................... 8
1.4.6 Modem Unit ............................................................................................................... 8
1.4.7 Modem Antenna ........................................................................................................ 9
1.4.8 Rack Communication Board ...................................................................................... 9
1.4.9 Power Supplies.......................................................................................................... 9
1.5 Rear Panel ............................................................................................................................. 10
2 Installation .................................................................................................................................... 11
2.1 Unpacking ............................................................................................................................. 11
2.2 Mounting in Rack .................................................................................................................. 11
2.3 Grounding ............................................................................................................................. 11
2.4 Connections .......................................................................................................................... 12
2.4.1 Single Sector RF Connections ................................................................................ 12
2.4.2 Configuration at Delivery is Alternative 1. ............................................................... 13
2.4.3 Fibre Optic Connections .......................................................................................... 13
2.4.4 Connections for Cascaded OMU Units ................................................................... 14
2.4.5 External Alarm and Relay Connections .................................................................. 15
2.4.6 Modem Connections ............................................................................................... 16
2.5 Connecting Power and Power-up .......................................................................................... 17
2.6 OMU Module Configuration Examples ................................................................................... 18
3 Setup ............................................................................................................................................ 20
3.1 Initiate Local Communication ................................................................................................ 20
3.1.1 RMC Communication .............................................................................................. 20
3.2 Configure the OMU ................................................................................................................ 21
3.2.1 Set OMU Name (TAG) ............................................................................................ 21
3.3 Fiber Loss Compensation and Master Attenuation ................................................................ 21
3.4 External Alarms ..................................................................................................................... 22
3.5 Relay ..................................................................................................................................... 23
3.6 Integration into AEM .............................................................................................................. 23
3.7 Set Up OMU-Repeater System ............................................................................................... 24
3.8 Balance the System ............................................................................................................... 25
3.8.1 Downlink Path.......................................................................................................... 25
3.8.2 Fiber Loss Compensation ....................................................................................... 26
3.8.3 Uplink Path .............................................................................................................. 27
3.8.4 Noise Considerations .............................................................................................. 27
3.9 Initiate Fibre Loss Compensation .......................................................................................... 27
3.10 Set up Remote Communication ............................................................................................. 30
To Next Page
Loading...