AV-32220
Measuring
ItemTest pointAdjustment partDescription
instrument
MTS SAPSignalMPXNo.11 5FH MON.1. Receive a RF signal (non-modulated sound signal) from the
VCOgeneratorConnectorantenna terminal.
adjustment4pin SDANo.12 SAP VCO2. Connect between pin4ofMPXconnector and GND (Pin
Frequency3ofMPXconnector) through 1M? Resistor.
3pin GND
counter
2pin RTV3. Select the ?No.11 5FH MON.? of the SOUND MODE, and reset
the1 setting value from 0 to 1.
[AV
4. Connect the Frequency counter to pin2(R.OUT) ofMPX
SELECTOR
PWB]connector.
5. Select the ?No.12 SAP VCO?.
6. Set the initial setting value of ?No.12 SAP VCO? with the
LEFT/RIGHT key of the menu.
7. Adjust the ?No.12 SAP VCO? so that the Frequency Counter
will display 78.67kHz?0.5kHz.
8. Select the ?No.11 5FH MON.? of the SOUND MODE, and reset
the setting value from 1 to 0.
MTS FILTERNo.8 FILTER1. Select the ?No.8 FILTER? of the SOUND MODE.
check2. Verify that the ?No.8 FILTER? is set at its initial setting value.
MTSTV audioMPXNo.9 LOW SEP.Menu ?MTS? is set to ?STEREO?.
SEPARATIONmultiplexConnector1. Input a stereo L signal (300Hz) from the TV audio multiplex
adjustmentsignal1pin LTVNo.10 HI SEP.signal generator to the antenna terminal.
generator2. Connect an oscilloscope to pin 1(L OUT) of MPX
2pin RTV
connector, and display one cycle portion of the 300Hz signal.
[AV
Oscilloscope3. Change the connection of the oscilloscope to pin2(R OUT)
SELECTOR
PWB]of MPXconnector, and enlarge the voltage axis.
4. Select the ?No.9 LOW SEP.? of the SOUND MODE.
5. Set the initial setting value of the ?No.9 LOW SEP.? with the
LEFT/RIGHT key of the menu.
6. Adjust the ?No.9 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.10 HI
L-ChannelR-ChannelSEP.?.
signal waveformcrosstalk portion
Minimum
1 cycle
26No. 51782 |