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ELECTRICAL ADJUSTMENTS
ALIGNMENT OF FM MULTIPLEX SECTION
FM signal generator should be modulated by FM stereo signal generator.
Modulation level: 19kHz 10% (7.5kHz dev)
1000Hz 30% (22.5kHz dev)
FM signal generator output level: 66dBµ (1mV)
Frequency: 98.1 MHz.
Set the radio for FM reception and tune to signal. Adjust volume control to provide 0.5 watt on AC VTVM and tone to center. Set
L/R balance control for equal output at each channel.
STEP
1
2
3
MODULATION
FREQUENCY
19kHz & 1000Hz
(Left Channel)
SG att:66dBµ EMF
19kHz & 1000Hz
(Right Channel)
19kHz & 1000Hz
(Left Channel)
SG att:45dBµ EMF
OUTPUT INDICATOR
AC VTVM across Right speaker or
Right channel load
AC VTVM through Left speaker or
Left channel load
AC VTVM across Right speaker or
Right channel load
ADJUST-
MENT
R137
R137
R156
REMARKS
Adjust for minimum.
Check for minimum.
Adjust for 20dB Separation.
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