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— 8 —
Stereo Level Adjustment
Setting:
IF BAND : WIDE
IF BAND : WIDE
Procedure:
1. Tune the set to 98 MHz.
2. Adjust RV251 so that the “STEREO” indicator goes on.
1. Tune the set to 98 MHz.
2. Adjust RV251 so that the “STEREO” indicator goes on.
Narrow Gain Adjustment
Setting:
IF BAND : NARROW
IF BAND : NARROW
Procedure:
1. Tune the set to 98 MHz.
2. Set IF BAND switch to the NARROW position.
3. Adjust RV231 so that the “STEREO” indicator goes on.
1. Tune the set to 98 MHz.
2. Set IF BAND switch to the NARROW position.
3. Adjust RV231 so that the “STEREO” indicator goes on.
FM Meter Level Adjustment
Setting:
IF BAND : WIDE
IF BAND : WIDE
Procedure:
1. Tune the set to 98 MHz.
2. Press DISPLAY key to display the digital signal, then adjust
1. Tune the set to 98 MHz.
2. Press DISPLAY key to display the digital signal, then adjust
RV221 to be displayed as “SIG 70dB”.
set
FM RF Stereo
signal generator
signal generator
FM ANTENNA (75
Ω
)
Modulation : Stereo Standard signal
Output level : 32
Output level : 32
µ
V (30dB
µ
) (at 75
Ω
open)
Front End IFT/STEREO Distortion Rate Adjustment
Setting:
IF BAND : WIDE
IF BAND : WIDE
Procedure:
1. Tune the set to 98 MHz.
2. Remove the top cover of the front end (FE101).
3. Adjust IFT1 of the front end (FE101) to put the noise up-and-
1. Tune the set to 98 MHz.
2. Remove the top cover of the front end (FE101).
3. Adjust IFT1 of the front end (FE101) to put the noise up-and-
down and symmetrically on the waveform of the oscilloscope.
4. Adjust the front end (FE101) IFT1 to minimize the STEREO
distortion rate.
5. Attach the removed top cover of the front end (FE101) as it
was.
Note : Do not turn more than a half turn from the core position
which is adjusted on the front end IFT adjustment.
Narrow THD Adjustment
Setting:
IF BAND : NARROW
IF BAND : NARROW
Procedure:
1. Tune the set to 98 MHz.
2. Set IF BAND switch to the NARROW position.
3. Set SSG output level to 80dBµ.
4. Adjust RV232 for a minimum reading on the distortion meter.
1. Tune the set to 98 MHz.
2. Set IF BAND switch to the NARROW position.
3. Set SSG output level to 80dBµ.
4. Adjust RV232 for a minimum reading on the distortion meter.
set
FM RF Stereo
signal generator
signal generator
FM ANTENNA (75
Ω
)
LINE OUT
Modulation : Monaural Standard signal
Output level : 2.2
Output level : 2.2
µ
V (7dB
µ
) (at 75
Ω
open)
+
–
–
Oscilloscope
set
FM RF Stereo
signal generator
signal generator
FM ANTENNA (75
Ω
)
LINE OUT
Modulation : Stereo Standard signal
Output level : 6mV (76dB
Output level : 6mV (76dB
µ
) (at 75
Ω
open)
distortion meter
1kHz
highpass
filter
set
FM RF Stereo
signal generator
signal generator
FM ANTENNA (75
Ω
)
LINE OUT
Modulation : Stereo Standard signal
Output level :6mV (76dB
Output level :6mV (76dB
µ
) (at 75
Ω
open)
distortion meter
1kHz
highpass
filter
set
FM RF Stereo
signal generator
signal generator
FM ANTENNA (75
Ω
)
Modulation : Stereo Standard signal
Output level : 3mV (76dB
Output level : 3mV (76dB
µ
) (at 75
Ω
open)
set
FM RF Stereo
signal generator
signal generator
FM ANTENNA (75
Ω
)
Modulation : Stereo Standard signal
Output level : 32
Output level : 32
µ
V (30dB
µ
) (at 75
Ω
open)
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