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AV-27920
Measuring | Test point | Adjustment part
Description
instrument
MTS SAP
Signal
[MPXx]
No.10 5FH MON.
. Receive a RF signal (non modulated sound signal) from the
vco
generator
antenna terminal.
adjustment
2. Connect between pin [4) of [MPX] connector and GND (Pin
[3] of [MPX] connector) through 1MQ
Resistor.
3. Select the "No.10 5FH MON." of the SOUND MODE, and reset
the setting value from 0 to 1.
'
4. Connect the Frequency Counter to pin [2) (R.OUT) of [MPX]
connector.
5. Select the "No.11 SAP VCO".
6.
Set the initial setting value of "No.11
SAP
VCO" with the
LEFT/RIGHT key of the menu.
7. Adjust the "No.11 SAP VCO" so that the Frequency Counter
will display 78.67kKHz-+0.5kHz.
8. Select the "No.10 SFH MON." of the SOUND MODE, and reset
the setting value from 1 to 0.
Connector
[4] pin SDA|No.11 SAP VCO
[3] pin GND
[2] pin RTV
Frequency
counter
.
Select the "No.7 FILTER" of the SOUND MODE.
2. Verify that the "No.7 FILTER' is set at its initial setting value.
MTS FILTER
check
No.7 FILTER
MTS
No.8 LOW SEP,
SEPARATION
adjustment
TV audio
multiplex
signal
generator
{MPX]
Connector
{1] pin LTV
No.3 Hj SEP.
(2} pin RTV
Input a stereo L signal (300Hz) from the TV audio multiplex
signal generator to the antenna terminal.
2. Connect an oscilloscope to pin
[1] (L OUT) of [MPX]
connector, and display one cycle portion of the 300Hz signal.
3. Change the connection of the oscilloscope to pin [2] (R OUT)
Oscilloscope
of
{MPX] connector, and enlarge the voltage axis.
4. Select the "No.8 LOW SEP." of the SOUND MODE.
5.
Set the initial setting value of the "No.8 LOW SEP." with the
LEFT/RIGHT key of the menu.
6. Adjust the "No.8 LOW SEP." so that the stroke element of the
300Hz signal will become minimum.
7. Change the signal to 3kHz, and similarly adjust the "No.9 HI
SEP.".
L-Channel
R-Channel
signal waveform
crosstalk portion
} Minimum
ee ———
20
.
No.51370
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