User's Manual

Weehawken Tunnel 800MHz Repeater
User/Maintenance Handbook
Handbook N.-Weehawken_800 Issue No:-A
Date:-05/08/05
Page:-
33 of 51
6.10 Low Noise Amplifier (11-006702)
6.10.1 Description
The Gallium-Arsenide low noise amplifiers used in the system are double stage, solid-state
low noise amplifiers. Class A circuitry is used throughout the units to ensure excellent
linearity and extremely low noise over a very wide dynamic range. The active devices are
very moderately rated to provide a long trouble-free working life. There are no adjustments
on these amplifiers, and in the unlikely event of a failure, then the complete amplifier should
be replaced. This amplifier features its own in-built alarm system which gives a volt-free
relay contact type alarm that is easily integrated into the main alarm system.
6.10.2 Technical Specification
PARAMETER SPECIFICATION
Frequency range: 800 – 1000MHz
Bandwidth: <200MHz
Gain: 29dB (typical)
1dB Compression point: 20dBm
OIP3: 33dBm
Input/Output return loss: >18dB
Noise figure: 1.3dB (typical)
Power consumption: 180mA @ 24V DC
Supply voltage: 10-24V DC
Connectors: SMA female
operational: -10°C to +60°C
Temperature range:
storage: -20°C to +70°C
Size: 90 x 55 x 30.2mm
Weight: 290gms (approximately)