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MULTIPLEX
COIL
AND
SEPARATION
ALIGNMENT
EQUIPMENTS REQUIRED
Stereo modulator .........
Signal generator
Oscilloscope
Dummy antenna
VTVM
PROCEDURE
Connect stereo modulator output to EXT Mod. terminal of signal generator.
aditedes Modulation rate by 19kHz pilot signal ...... 3~10%
Modulation rate by left signal ...............06 27%
OUTPUT EVE] sssecsskes en scSecstae shes Sedecaaaa as saces 60 dB
FREQUENCY tisfiwices sivsstaseedectieadecevensassvorsave Approx. 98 MHz
Band selector to FM, dial setting to approx.
98MHz,
tone contro! to HIGH, Volume
control should be no higher than neccesary to obtain output reading.
SIGMAL
SOURCE
CONNECTION
EQUIPMENT
CONNECTION
ADJUSTMENT
REMARKS
Adjustment of pilot
signal.
Adjustment of
separation.
Measurement of
stereo eye lighting
level.
98MHz, 30 dB
98 MHz, 60 dB
modulation by L
signal.
(Refer to fig. 11)
TP104
(Refer to fig. 12)
T110
(Refer to fig. 12)
VR101
(Refer to fig. 12)
* Set stereo (L+R) modulation to
Zero.
* Measure pilot signal only, and
adjust for maximum.
* Then change the modulation by
R signal only, and adjust semi-fixed
variable resistor VR101 so that
L-CH output becomes minimum.
* Likewise modulate by L signal
only, and adjust VR1O1 so that
R-CH output becomes minimum.
* Adjust output of signal generator,
and make sure that stereo eye
lights at less than 34 aB.
ers
J
Signal generator
Hl
Oscilloscope
AUDIO
DEARTH
it)
RADIO CIRCUIT BOARD
Recommended equipment connection for separation alignment.
Fig.
11
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