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 32 of 114
4.5.1. 8 Ch. Squelch Gated BDA 60-228704 List of Major Sub-Components
Component
Part
Part Description Qty Per
Assembly
05-002603 3dB Splitter/Combiner 1
12-026902 25W Power Amplifier 2
19-002202 Interconnection Assembly 1
90-852315 15dB Directional Coupler 1
96-110015 15A Fuse 1
E931030 UHF SDR Module (489.25MHz to 494.25MHz) 1
H561003 Control Module 1
J1161030 External Alarm and Battery Module 1
J1421001 DC/DC Converter 1
R031002 Reference Generator 1
4.5.2. 8 Ch. Squelch Gated BDA 60-228704 Specification
PARAMETER SPECIFICATION
Downlink
Frequency Range
489.5MHz to 491.0MHz
No of Channels
8
(1)
Maximum Gain
>+95 dB
Passband ripple
±1.5 dB
ALC Setting (all channels on)
+28 ±1 dBm
ALC Dynamic Range
>30 dB
Switched attenuator
0dB to 30 dB in 2dB steps ± 1dB
Noise Figure
4.5 dB (at maximum gain)
In Band Spurious Noise (30kHz B/W)
< -36 dBm (at maximum gain)
Squelch Level
-95dBm ±2 dBm
Uplink
Frequency Range
492.5MHz to 494.0MHz
No of Channels
8
(2)
Maximum Gain
>+95
Passband ripple
±1.5 dB
ALC Setting (all channels on)
+23 ±1 dBm
ALC Dynamic Range
>30 dB
Switched attenuator
0dB to 30 dB in 2dB steps ± 1dB
Noise Figure
4.5 dB (at maximum gain)
In Band Spurious Noise (30kHz B/W)
< -36 dBm (at maximum gain)
Squelch Level
-95 ±2 dBm
General
Supply Voltage
24V DC
Current consumption
< 12 A
Alarm output
Summary volts free dry contact output
(Closed = Normal / Open = Alarm)
pins 7 & 8 - Alarm connector
terminal on External Alarm and
Battery Module J1161030