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FM SECTION
« Standard Setting of FM stereo RF Signal Generator.
STEREO STANDARD SIGNAL
Carrier frequency : 98.0 MHz
Modulation : Audio 1 kHz, 40 kHz deviafion.
Pilot 19 kHz, 7.5 kHz deviation
MONAURAL STANDARD SIGNAL
98.0 MHz
1 kHz, 45 kHz deviation
FM Discriminator Adjustment.
(NULL and MONO Distortion)
FM RF stereo signal
Distortion
generator
meter
Output level: ImV (50 dBu)
Antenna FM (7592)
Tape 1
Won
Output
{DC range)
(NULL)
TP2
=
TP3
Procedure :
1. Tune the set to 98.0 MHz.
2. Adjust L903 for 0 V reading on the VOM.
--NULL
3. Adjust L904 for a minimum
reading on the
distortion meter.
-+-+-+++-+++++- MONO Distortion
4.Repeat the adjustments
of 2 and 3 several
times.
Note : When replacing the ceramic filter,
perform this alignment.
FM Stereo Distortion Adjustment
FM RF stereo signal
Distortion
generator
meter
6 dB Loss ——4
[7]
————_—_—_—_—o+
set "T_T
oo
2
+
ae
Antenna FM (75)
= Tape 1
Output
Mode : stereo
Output level: 1 mV (60 dBu)
Procedure :
:
1. Tune the set to 98.0 MHz.
Set SSG. output level to 1 mV (60 dBu)
2. Adjust IFT in FE 901 for a minimum reading on
the distortion meter.
18
FM Tuned Indication Lighting Level Adjustment
FM RFF stereo signal
generator
Output level : 7 uV (17 dBp)
Set FM Antenna teminal (75 $2)
Procedure :
1. Tune the set to 98.0 MHz.
Set SSG output level to 17 dBu.
2. Adjust VR 902 to the place where "TUNED"
indicator lights.
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