User's Manual

800MHz & VHF Cell Enhancers
Maintenance Handbook
H/book Number:-50-078001HBKM
Issue No:-
A
Date:-02/09/2004
Page:-
61 of 88
5.14 LNA’s (11-001202, 11-005802, 11-005902 11-006002, 11-006702 & 11-004802)
5.14.1 Description
The Gallium-Arsenide low noise amplifiers used in the unit 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.
5.14.2 Technical Specification (11-001202)
PARAMETER SPECIFICATION
Frequency range: 10 - 600MHz
Bandwidth: 200MHz (as required, tuneable)
1dB Compression point: >+15 dBm
3rd order intercept: >+25dBm
Gain: 20dB (typical)
VSWR: better than 1.5:1
Noise figure: 3.5dB (typical)
Connectors: SMA female
Supply: 108mA @ 24V DC
Temp. range: operational: -10°C to +60°C
storage: -20°C to +70°C
Weight: 0.4kg
Size: 88.9 x 50.8 x 31.75 mm (case only)
5.14.3 Technical Specification (11-004802)
PARAMETER SPECIFICATION
Frequency Range: 350 - 550MHz
Bandwidth: <100MHz (as required, tuneable)
1dB Compression Point: >+29dBm
3rd Order Intercept: >+44dBm
Gain: >10dB (typical)
VSWR: better than 1.5:1
Input return loss: >14dB
Noise Figure: <4.0dB (typical)
Connectors: SMA female
Supply: 300mA at 24V DC
operational
:
-10°C to +60°C
Temperature range:
storage: -20°C to +70°C
Size: 88 x 50 x 34mm (ex. connectors)
Weight: 0.26kg