Illustration 4–7 Driver Switch Logic Board
4.8 RF Driver
The RF Driver module is mounted next to the heat sinks on the bottom of the RF Amplifier/
Combiner sub chassis. The driver amplifies the approximate 20 milliwatts from the frequency
synthesizer to about 20 watts to drive the RF power amplifiers. A CA2832 hybrid, high-gain,
wideband amplifier, operating at about 20 volts, provides about one watt of drive to a single
BLF245 MOSFET amplifier. The BLF245 stage operates from a supply voltage of approxi-
mately 24 volts.
The circuit board provides for input/output coupling and for power supply filtering.
DS1
DS2
DS3
DS4
DS5
DS6
DS7
DS8
TP9
TP6
TP1
TP2
TP3
TP4
TP5
TP7
TP8
TP10 TP11
JP1
4-13 Principles of Operation
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