Handbook
Axell Wireless Limited
Technical Literature
WMATA CRCS Redundant Antenna System
General Overview
Document Number 60-228701HBK Issue No. 3 Date 28/05/2010 Page 8 of 114
3. 60-228801 - WMATA Jackson Graham Building CRAS System
The WMATA Jackson Graham Building CRAS System consists of the following equipment:
Part No. 60-228703 Dual Fiber Optic Unit
Part No. 60-091705 Dual Redundant PSU
The Jackson Graham Building CRAS System provides the Primary Downlink to and receives the Primary
Uplink signal from the Gallery Place Station CRAS System.
The Downlink signal is received from a BTS via a direct connection and is modulated onto an optical signal
which is then fed to the Gallery Place Station CRAS System via fiber optic cables. This Downlink is the
Primary Downlink from the Jackson Graham Building CRAS System to the Gallery Place Station CRAS
System.
Uplink optical signals from the Gallery Place Station CRAS System are received via fiber optic cables,
demodulated to RF and fed to the BTS. This Uplink is the Primary Uplink from the Gallery Place Station
CRAS System to the Jackson Graham Building CRAS System.
Provision is made for a redundant standby path in both the Downlink and Uplink, these are referred to as the
“Main Primary” and “Standby Redundant” paths.
3.1. 60-228801 List of Major Sub-Components
Component
Part
Component Part Description Qty Per
Assembly
60-228703 Dual Fiber Optic Unit 1
60-091705 Dual Redundant PSU 1