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 81 of 114
5.12.2. RF Failover Switch Unit 60-228905 Specification
PARAMETER SPECIFICATION
RF Downlink Frequency range
489.5MHz to 491.0MHz
496.3MHz to 496.7MHz
RF Uplink Frequency range
499.3MHz to 499.7MHz
492.5MHz to 494.0MHz
Coupling D/L Output to Mon D/L
20 dB ± 1dB
Coupling U/L Input to Mon U/L
20 dB ± 1dB
Optical Downlink
Wavelength
1310nm
RX(A) Gain
>+15 dB
RX(A) Gain Set To
0 dB±0.5
RX(A) Alarm Threshold
< -10dBm
RX(B) Gain
>+15 dB
RX(A) Gain Set To
0 dB±0.5
RX(B) Alarm Threshold
< -10dBm
Optical Uplink
Wavelength
1310nm
TX(A) Optical TX Power
1-3 dBm
TX(B) Optical TX Power
1-3 dBm
Coupling RX1 to Mon RX1
20 dB ± 1dB
Coupling RX2 to Mon RX2
20 dB ± 1dB
Downlink Gain from Fiber
20dB
Typical carrier power to CRCS output
0dBm per carrier
RF Detection Level
-10dBm to +20dBm Composite
Detection Level Setting
0dBm
Relay Switching Time
<200ms
General
Supply Voltage
24V DC
Current consumption
< 1.0A @ 24V DC input
Alarm output
Summary volt free dry contact output
(Closed = Normal / Open = Alarm)
Summary Alarm output Pin 1 & 2
Primary Relay Status output Pin 3,4 & 5
Redunt. Relay Status output Pin 6,7 & 8
0v Ground Pin 9