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5.4 GEN _ (Generator)
BOARD
(X52-1010-10)
(See Figure 16)
During transmission, the generator circuit produces
a DSB
signal.
The
circuit
consists
of a high
input
impedance
microphone amplifier and a four-diode balanced modulator.
The DSB signal is fed through the IF amplifier (Q4), where
its level is automatically controlled by the ALC, and then
to the XF board. The GEN board also holds the receiver's
balanced product detector.
Pe ET ELE rT}
FIGURE
16.
GEN
Board
Jono
UP
XE
REG 9V>
Qs
a
5
>
a
es
<
2
i
@
MICRO
:
Fa
=PHONE mr
=
g
cit 19 25
He
U3 Ime
A1Lb
GND GND GND GND MVI MV2
MAO BI
ae
Qi:
28K24(E)
3a vo
'
3 iF
AF-output
3
ont
Qz
:28¢ 373
ONIT |
~
Q3
: 28C733(Y)
VRS
Q4
: 3SK35(GR)
MIC GAIN VR
23
5
.
b.4
Ding : INGO
MOgesW
ae
Dio : 181585
ad
Ualge
Du =: wz-090
CAR LEVEL ADJ
R22. 470K
RIB IK
IF-input ale ROFF Carrier
TON
'input
AAAARKR
IF29 31 CNISCRIICRID
GEN
Unit (X52-1010-10)
FIGURE
17.
GEN Schematic
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