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FM Stereo Separation Adjustment
FM PF stereo signal
generator
Mode : stereo
Output level : 1 mV (60 dBu)
Antenna FM (75 92)
Tape 1
Output
Procedure :
FM stereo
signal generator
output channel!
VTVM
VIVM
reading (dB)
connection
®
Adjust VR903
minimum reading.
R-CH.
|
R-CH.
©
©
L-CH.
R-CH.
| Adjust VR903 for
minimum reading.
L-CH. Stereo separation:
© — ®
R-CH. Stereo separation:
© - D
The separation of both channels should be
equal.
AM SECTION
AM RF
signal generator
I
|
{
:
—_—_—_—P:
f
60cm
|
| 26dBLoss
;
AM loop antenna
30% amplitude
modiulation by
400 Hz signal
Output Level : 80 dB(+26 dB Loss)
603 kHz, 999 kHz, 1404 kHz
AM loop antenna
AM antenna terminal
dBy/m = (SSG output level) - 26 dB
AM Vrt(Tunning Voltage) Adjustment
1. Set to AM 522 kHz and adjust L902 so that
voltage of TP1 becomes 1.1V +0.05V
2. Set to AM 1611 kHz and adjust TC902 so that
voltage of TP1 becomes 8.4 +0.05V
3. Repeat the above adjustments 1 and 2.
AM Tracking Adjustment
AM RF
signal generator
30% amplitude
modulation by
400 Hz signal
AM loop antenna
AM antenna terminal
dBu/m = (SSG output level) - 26 dB
1. Set to AM 603 kHz and adjust L901 to
maximize AUDIO output level.
2. Set to AM 1404 kHz and adjust TC901 to
maximize AUDIO output level.
3. Set to AM 999 kHz and adjust L905 to
maximize AUDIO output level.
4. Repeat the above adjustments 1, 2 and 3.
AM TUNED Level Adjustment
Procedure :
1. Set SSG output level so that antenna input
level of the set becomes 630 pV (56 dByu/m).
2. Adjust VR901 to the place where "TUNED"
indicator lights.
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