User's Manual

UHF Fibre-Fed Remote Site

User Handbook

Handbook N.-60-137601HBK Issue No:-1

Date:-18/03/2005

Page:-

22 of 38

4.3 Low Noise Amplifiers (11-007302 & 11-007402)

4.3.1 Description

The low noise amplifier used is a double stage solid-state low-noise amplifier. Class A

circuitry is used in the unit to ensure excellent linearity over a very wide dynamic range. The

two active devices are very moderately rated to provide a long trouble-free working life.

There are no adjustments on this amplifier, and in the unlikely event of failure then the entire

amplifier should be replaced. Note that the two amplifiers use similar DC/bias circuits.

4.3.2 Technical Specification (11-007302)

PARAMETER SPECIFICATION

Frequency range: 380-500MHz

Bandwidth: <140MHz

Gain: 20-22dB

1dB Compression Point: +23.5dB (typical)

3rd order intercept: +36dB (typical)

Input/Output return loss: >20dB

Noise figure: <1.3dB

Connectors: SMA female

Supply: 200-230mA @ 10-24V DC

operational: -10°C to +60°C

Temperature range:

storage: -20°C to +70°C

Weight: <300gm

Size: 90 x 55 x 30.2 (case only)

4.3.3 Technical Specification (11-007402)

PARAMETER SPECIFICATION

Frequency range: 380-500MHz

Bandwidth: <140MHz

Gain: 30-32dB

1dB Compression Point: +22dBm (typical)

3rd order intercept: +34-35dBm (typical)