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AV-35750
AV-35770
Measuring
instrument
MTS SAP
Signal
vco
generator
adjustment
Frequency
counter
MTS
FILTER
check
MTS
TV audio
SEPARATIO- | multiplex
N
signal gen-
adjustment
| erator
Oscillo-
scope
L-Channel
signal waveform
24 (No.51130)
Test point
Adjustment part
MPX
No.11 5FH MON.
Connector
[4] pin SDA
|No.12 SAP VCO
[3] pin GND
[2] pin RTV
[AV SELEC-
TOR PWB]
No.8 FILTER
MPX
No.9 LOW SEP.
Connector
pin LTV | No.10 HI SEP.
pin RTV
[AV SELEC-
TOR PWB}
R-Channel
crosstalk
portion
4
. Connect
an oscilloscope
to pin
. Change the connection of the oscilloscope to pin
Description
. Receive a RF signal (non modulated
sound signal) from the
antenna terminal.
. Connect between pin [Jor MPX| connector and GND
(Pin
of [Px] connector) through 1MQ Resistor.
. Select the "No.11
5FH MON."
of the SOUND
MODE,
and
reset the setting value from 0 to 1.
. Connect the Frequency
Counter
to pin
[2](R.OUT) of
connector.
. Select the "No.12 SAP VCO".
. Set the initial setting value of "No.12
SAP
VCO"
with the
LEFT/RIGHT key of the menu.
. Adjust the "No.12 SAP VCO" so that the Frequency Counter
will display 78.67KHz + 0.5KHz.
. Select the "No.11
5FH
MON."
of the SOUND
MODE,
and
reset the setting value from 1 to 0.
. Select the "No.8 FILTER" of the SOUND MODE.
. Verify that the "No.8 FILTER" is set at its initial setting value.
. Input a stereo L signal (300Hz) from the TV Audio Multiplex
Signal Generator to the antenna terminal.
G] «& out) of
connector, and display one cycle portion of the 300Hz signal.
2]
OUT) of
connector, and enlarge the voltage axis.
. Select the "No.9 LOW SEP." of the SOUND MODE.
. Set the initial setting value of the "No.9 LOW SEP." with the
LEFT/RIGHT key of the menu.
. Adjust the "No.9 LOW SEP." so that the stroke element of the
300Hz signa! will become minimum.
. Change the signal to 3kHz, and similarly adjust the "No.10 HI
SEP.".
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