16
CDX-L250/L430X
AM Auto Scan/Stop Level Check
Note : This adjustment should be performed after the FM Auto
Scan / Stop Level Adjustment is done.
Setting :
SOURCE
t
MODE button
: AM
FREQUENCY SELECT switch (L430X) : AM 9k
Carrier frequency : 1000 kHz (L250)
: 999 kHz (L430X)
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 15)
2. Push the SRC button.
3. Push the MODE button and set to AM.
4. Check that the “AM” indication turns to “AM0” indication on
the display window.
*2: L430X are indicates “999”.
FM Stereo Separation Adjustment
Setting :
SOURCE button
: FM
FREQUENCY SELECT switch (L430X) : FM 50k
Carrier frequency : 97.9 MHz (L250)
: 98.0 MHz (L430X)
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%)
L-CH stereo separation :
A
–
B
R-CH stereo separation :
C
–
D
The separations of both channels should be equal.
Specification : Separation more than 24 dB
Adjustment Location :
FM stereo
Level meter
Level meter
signal generator
connection
reading (dB)
output channel
L-CH
L-CH
A
B
R-CH
L-CH
Adjust RV1 on TU601
for maximum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV1 on TU601
for maximum reading.
Procedure :
antenna
terminal
0.01
µ
F
set
level meter
FM RF signal
generator
AUDIO OUT REAR
10 k
Ω
RV1
FM Stereo Separation
Adjustment
antenna
terminal
set
AM RF signal
generator
AM dummy
antenna (50
Ω
)
65 pF
15 pF
set
30
Ω
AM
0
1 00Z
Z
Z
ST
SHUF
2
Display
AM0
Z
0
1 00Z
Z
Z
SHUF
2
ST
Display
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