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3 7 63 1515 0
FM Stereo Separation Adjustment
Setting :
SOURCE button
FREQUENCY SELECT switch : FM 200k
FM RF signal
generator
antenna
terminal
0.01 µF
Carrier frequency : 97.9 MHz
Output level
: 70 dB (3.2 mV)
Mode
: stereo
Modulation
: main :1 kHz, 33.75 kHz deviation (45%)
sub :1 kHz, 33.75 kHz deviation (45%)
19 kHz pilot : 7.5 kHz deviation (10%)
Procedure :
FM stereo
Level meter
signal generator
connection
output channel
L-CH
L-CH
R-CH
L-CH
R-CH
R-CH
TE
L 13942296513
L-CH
R-CH
L-CH stereo separation : A – B
R-CH stereo separation : C – D
The separations of both channels should be equal.
Specification : Separation more than 28 dB
Adjustment Location : See page 23.
www
.
22
http://www.xiaoyu163.com
: FM
level meter
10 kΩ
set
AUDIO OUT REAR
Level meter
reading (dB)
A
B
Adjust RV4 on TU1 for
maximum reading.
C
D
Adjust RV4 on TU1 for
maximum reading.
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ao
y
i
http://www.xiaoyu163.com
8
AM Auto Scan/Stop Level Adjustment
Note : This adjustment should be performed after the FM Auto
Scan / Stop Level Adjustment is done.
Setting :
SOURCE t MODE button
FREQUENCY SELECT switch : AM 10k
AM RF signal
generator
Carrier frequency : 1000 kHz
Output level
: 30 dB (44.7 µV)
Mode
: mono
Modulation
: 1 kHz, 22.5 kHz deviation (30%)
Procedure :
1. Set to the test mode. (See page 20.)
2. Push the SOURCE button.
3. Push the MODE button and set to AM.
Q Q
3
6 7
1 3
4. Push the preset 3 button.
5. Adjust with the volume RV1 on TU1 so that the "AM"
indication turns to "2" indication on the display window. But,
in case of already indicated "2", turn the RV1 so that put out
light "2" indication and adjustment.
u163
Adjustment Location : See page 23.
.
2 9
9 4
2 8
: AM
30 Ω
65 pF
AM dummy
antenna (50 Ω)
set
set
antenna
terminal
Display
1 5
0 5
8
2 9
9 4
SHUF1
Display
PRESET
SHUF1
Display
PRESET
SHUF1
m
co
9 9
15 pF
2 8
9 9
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