User's Manual

P B L Tunnel Units 1 & 2
Maintenance Handbook
H/book Number:-60-056100HBKMFCC
Issue No:-2
Date:-04/01/2006
Page:-
42 of 63
5.2.7 450MHz 20W Power Amplifier (12-004201)
5.2.7.1 Description
The power amplifiers fitted to this unit are multi-stage, solid state power amplifiers. Class
A circuitry is employed throughout the units to ensure excellent linearity over a wide
dynamic frequency range. All the semi-conductor devices are very conservatively rated to
ensure low device junction temperatures and a long, trouble free working lifetime.
The power amplifiers should require no maintenance over their operating lives. Under no
circumstances should the cover be removed or the side adjustments disturbed unless it is
certain that an amplifier has failed; since they are critically aligned during manufacture
and any re-alignment will require extensive test equipment.
5.2.7.2 Technical Specification
PARAMETER SPECIFICATION
Frequency Range: 350 – 550MHz (tuned to spec.)
Bandwidth: 20MHz (tuned to spec.)
Maximum Output Power: >20W (each)
Gain: 30dB
1dB Compression Point: <+43dBm
3rd Order Intercept Point: <+54dBm
VSWR: better than 1.45:1
Connectors: SMA female
Supply: 3.50A @ 24V DC
Size: 276 x 78 x 40mm (ex. Cons. & h’sink)
Weight: 1.5 kg (approx., excl. h’sink)
operational: -10°C to +55°C Temperature
range:
storage: -40°C to +70°C