Vertex Standard VXA-700 Service Manual page 14

Alignment
Tx FM Deviation Adjustment
r Connect the Radio Tester to the antenna jack, then
adjust the AF generator output level for injection of
200 mV rms @ 1 kHz to the MIC jack.
r Set the transceiver to 146.000 MHz and turn the trans-
ceiver off.
r Press and hold in the PTT switch, MONITOR switch,
and key while turning the transceiver on to enter
the alignment mode.
r Rotate the DIAL selector knob to select "FM MAX DEV
xxx."
r Press the PTT switch, and confirm that the maximum
deviation is ±4.2 to ±4.5 kHz.
r If not:
1. Press the key momentarily;
2. Rotate the DIAL selector knob clockwise (increases the
deviation) or counter-clockwise (decreases the devia-
tion);
3. Press and hold the
4. Confirm the deviation level.
r Repeat above steps 1 - 4, as necessary, until you achieve
the specified deviation of ±4.2 to ±4.5 kHz.
r Turn the transceiver off.
CTCSS Deviation Adjustment
r Connect the Radio Tester to the antenna jack, then set
the transceiver to 146.000 MHz and turn the transceiver
off.
r Press and hold in the PTT switch, MONITOR switch,
and key while turning the transceiver on to enter
the alignment mode.
r Rotate the DIAL selector knob to select "CTCSS DEV
xxx."
r Press the PTT switch, and confirm that the maximum
deviation is ±0.5 to ±0.7 kHz.
r If not:
1. Press the key momentarily;
2. Rotate the DIAL selector knob clockwise (increases the
deviation) or counter-clockwise (decreases the devia-
tion);
3. Press and hold the
4. Confirm the modulation level.
r Repeat steps 1 - 4, as necessary, until you achieve the
desired deviation of ±0.5 to ±0.7 kHz.
r Turn the transceiver off.
14
key for 1/2 second;
key for 1/2 second;
Receiver Section
AM & Narrow FM Squelch Hysteresis Adjustment
r Press and hold in the PTT switch, MONITOR switch,
and key while turning the transceiver on to enter
the alignment mode.
r Rotate the DIAL selector knob to select "AM/FM HITS
xxx."
r Press the key momentarily, then adjust the hys-
teresis level using the DIAL selector knob (default:
001).
r Turn the transceiver off.
Wide FM Squelch Hysteresis Adjustment
r Press and hold in the PTT switch, MONITOR switch,
and key while turning the transceiver on to enter
the alignment mode.
r Rotate the DIAL selector knob to select the "WFM HITS
xxx."
r Press the key momentarily, then adjust the hys-
teresis level using the DIAL selector knob (default:
000).
r Turn the transceiver off.
AM & Narrow FM Squelch Threshold Adjustment
r Connect the Radio Tester to the antenna jack, and ad-
just its output level to –11 dBµ (with standard AM
modulation: 30 % AM modulation @ 1 kHz) at 128.000
MHz.
r Set the transceiver to 128.000 MHz and turn the trans-
ceiver off.
r Press and hold in the PTT switch, MONITOR switch,
and key while turning the transceiver on to enter
the alignment mode.
r Rotate the DIAL selector knob to select "AM/FM TH SQ
xxx."
r Press the key momentarily (you will hear a long
beep), then press and hold in the
hear the short beep).
r Turn the transceiver off.
key (until you