Vertex Standard VX-2000U, Service Manual

Page: 22 / 65

22
Alignment
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Reduce the AF generator’s output to zero. Key
the transmitter, and adjust VR1004 (MAIN
Unit) for ±800 Hz deviation on the CTCSS tone
(within 100 Hz).
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On the computer, re-program channel 2 to en-
able DCS code 627 (encode), and download
this data to the transceiver.
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With the AF generator still set to zero, key the
transmitter, and adjust VR1005 (MAIN Unit)
for ±900 Hz deviation on the DCS signal (with-
in 100 Hz).
Receiver Squelch Threshold
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Set the transceiver to channel 2. Set the RF sig-
nal generator to the same frequency (415.000
for version A, 465.000 MHz for version D,
496.000 MHz for Ver. D). Set the signal gener-
ator’s output to -7 dBµ.
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Adjust VR1006 (MAIN Unit) clockwise until
the squelch just closes, and then counterclock-
wise until the squelch just opens.
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Turn off the signal generator, and confirm that
the squelch again closes when the RF input
signal disappears.
Restore Original Channel Data
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When all alignment steps have been complet-
ed, re-load the original channel data from your
computer’s disk, and download it to the trans-
ceiver.