Sony CDX-C4840R Service Manual page 19

FM Stereo Separation Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
FM RF signal
generator
antenna
terminal
0.01 µ F
Carrier frequency : 98.00 MHz
Output level : 70 dB (3.2 mV)
Mode : stereo
Modulation : main : 1 kHz, 20 kHz deviation (26.5%)
sub : 1 kHz, 20 kHz deviation (26.5%)
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
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 20.
level meter
10 k Ω
+
set
–
LINE OUT REAR
Level meter
reading (dB)
A
B
Adjust RV4 on TU601
for nimum reading.
C
D
Adjust RV4 on TU601
for minimum reading.
FM RDS S-Meter Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
FM RF signal
generator
Carrier frequency : 98.00 MHz
Output level
Mode
Modulation
Procedure :
1. Set to the test mode. (See page 18.)
2. Push the SOURCE button and set to FM.
3. Push the preset 10 button.
4. Adjust RV801 so that the display indication is "16.0".
Specification : Display indication : 15.8 to 16.2
Adjustment Location : See page 20.
– 19 –
antenna
terminal
0.01 µ F
set
: 35 dB (56.2 µ V)
: mono
: no modulation
Display
SHUF
Display
SHUF