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,SIF Adjustment
Item
Detector Adj.
13C15V
" ':
R368(C364
side)
.6
IF AGC(3.5-
4.5V)
IC181 -pin 3
;
Output Probe-1
IC181 - pin 1
:
Input Probe
IC181 - pin 14
s
:
Sweep ATT.
31 dB
:~
Output Probe
side a
:
Oscilloscope
Sens.
100mV/DIV
6
Adjust AGC voltage to be
Adjustment
A=O.5VP -p.
By using T1 81, adjust P to be
equal center line.
+
(38.9 MHz) P
A
Waveform
w
IC791
Item
FM Detector Adj.
DC 15V
R368(C364
side)
:
Output Probe-2
ICI 81- pin 12
g
Input Probe
ICI 81- pin 6
c
c
s
g
Carrier Freq.
5.74 MHZ
:~
Mod. Freq
1KHz(sine wave)
~
Scope Sens.
1Vldiv
G
By using T1 82, adjust DC Voltage of
Adjustment
sine wave to be 4.OV.
Waveform
@
4.OV
DC=OV
o
L41
--l
MEMC%Y
m
On-@
a
I@l
1121
//
o
T161
T1'2
I@@j
0182
ti
a'
0181-
tin- 12
If
G
.-,:
:2
w-\
,,.
,,
m!!is5\ @
. . ..
Detector Adj.
FM
Detector
Ad].
{
Input Probe
aosci''os
Ili%l
+5Q===
Output Probe-1
Output Probe-2
0.01 u F
+
3.3K Q
"G-d
75 Q
SIF
Signal
Generator
L
MAIN UNIT
–9–
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