User's Handbook

Roseville Tunnel PCS Band Selective Repeater
User Handbook
Handbook Nō.-55-151601HBK Issue No:-A
Date:-22/04/2005
Page:-
12 of 29
3.1 Description
The band selective (no channelisation) tunnel amplifier is directly connected to an air
interface antenna directed towards the base station and a leaky feeder antenna to cover the
mobiles in the tunnel. The downlink power is 20Watts, provided by a pair of parallel
configured 10W amplifiers, and the uplink power device is a single 1W amplifier, which is
sufficient power for ample communications with the base station.
Automatic gain control is featured in both paths to prevent overloading of the input stages
should a mobile be operated close to the antennas.
A built-in current fault alarm system monitors each active device in the system and outputs a
summary volt-free, relay contact pair suitable for integrating into any existing alarm loop
system.
3.2 Technical Specification
PARAMETER SPECIFICATION
1930-1990MHz (Downlink)
Frequency range:
1850-1910MHz (Uplink)
Bandwidth: 60MHz
Passband ripple: ±1.5dB
Gain: >85dB
Gain Adjustment: 0 - 30dB (in 2dB steps, both paths)
Uplink Power: >1.0Watts
Downlink Power: >20.0Watts
Uplink: +40dBm
IP3:
Downlink: +52.5dBm
+41.5dBm (downlink)
1dB compression point:
+29dBm (uplink)
Noise Figure: <6dB (@max gain)
+40dBm (downlink)
AGC:
+28dBm (uplink)
VSWR: better than 1.5:1
RF Connectors: N type, female
operational:
-10°C to +60°C
Temperature range:
storage:
-40°C to +70°C
Alarms Fitted:
(volt-free relay contacts/TTL)
1 Amplifiers (U/L & D/L)