User's Manual

The output signal is passed from T105 to T107 via a matching network consisting of Inductor
L119 and C 119.
R F power Amplifier
The signal is then amplified for transmission by T107,which is a R F power amplifier.
Low pass filter
The amplified R F signal is passed through the C AP coupler and is fed to the harmonic low pass
filter,comprising L112、L113、L114、L118、C 147、C 149、C 150、C 151、C 154、C 155 and then
to the antenna connector(ANT).
Antenna S witch
When transmitting,the diodes D 101 is forward biased,allowing the R F to pass to the antenna.
D102 is shorted to ground which mak es L110 look open circuit(1/ 4 wave tuned stub).This
prevents the TX signal from passing to the receiver stage.
Automatic power control(APC )circuits
The automatic power control contains the U701 transistors T701 and T702.
R eceiver
The receiver comprises:
R x
V C O
ANTE NNA
S WITC H
F ront E nd
Amp
F irst Mixer
IF F ilter