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1.4
RF Level Detector
The RF Detector threshold for the RFO LED on the amplifier front panel is set by
RV1. This is normally set at half the rated output power.
Ensure that the output power setting complies with the equipment's licence
requirements. Failure to do so may result in penalties being imposed by the
25 Pin Connector
Function/Signal
DC Power +12Vdc
- 0Vdc
ALC Output
RF Input
BNC Connector
RF Output
N Connector
2
Circuit Description
The following descriptions should be read as an aid to understanding the block and
schematic diagrams at the rear of this manual.
2.1
Amplifiers
The RF power amplification is provided by one or two transistors, Q4 and Q5.
The standard power version uses one transistor (Q4) and the high power version
uses two. Each transistor is rated at 75 watts output. The input and output
impedances of the transistors are matched to 50O by microstrip matching
networks.
RF Technology PA150
WARNING
licensing authority.
PA150 Amplifier I/O Connections
Pins
1,2,14,15
12,13,24,25
8
2 CIRCUIT DESCRIPTION
Specification
+11.4 to 16Vdc
Approx 7Vdc decreasing with
increasing power or temperature
25 Watts max
120 Watts Max
Page 4
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