User Manual

PBL UHF 1 & 2 Air Interface

Maintenance Handbook

H/book Number:-60-055900HBKM

Issue No:-1

Date:-13/02/2003

Page:-40 of 40

5.1.5 5Watt Power Amplifier (12-001801)

5.1.5.1 Description

The power amplifier fitted to this unit is a multi-stage, solid state class A power amplifier.

All the semi-conductor devices are very conservatively rated to ensure low device junction

temperatures and a long, trouble free working lifetime.

The power amplifier should require no maintenance over its operating life. Under no

circumstances should the cover be removed or the side adjustments disturbed unless it is

certain that the amplifier has failed; since it is critically aligned during manufacture and any

re-alignment will require extensive test equipment.

5.1.5.2 Technical Specification

Frequency Range:

400 - 500MHz (tuned to spec.)

Bandwidth:

20MHz (typical, tuneable)

Maximum Output Power:

>5W

Gain:

30dB

3rd Order Intercept Point:

<+37dBm

1dB Compression Point:

<+48dBm

VSWR:

better than 1.45:1

Connectors:

SMA female

Supply:

1.25A @ 24V DC

operational:

-10°C to +55°C

Temperature range:

storage:

-40°C to +70°C

Size:

276 x 78 x 40mm (case only)

Weight:

1.5 kg (excluding heatsink)