User's Manual

Antenna S witch
In receive,the diode D101 and D102 are reverse biased.L110 is now in circuit,passing the signal
from the antenna to the front end without signal loss.
F ront E nd
The receiver signal is routed to T201.It passes through the band pass filter consisting of L204、
L202、L203 to T202.
Diode D103 serves as protection from R F overload from nearby transmitters.
IF Amp
S econd
Mixer
IF
F ilter
Local
Oscillator
Audio F ilter
Data Out
F M
Limiter-
Discnminator
S quelch
C ircuit