Vertex Standard VXA-700 Service Manual page 16

Alignment
Wide FM S-meter (S-Full) Adjustment
r Connect the Radio Tester to the antenna jack, and ad-
just its output level to +25 dBµ (with standard Wide
FM modulation: ±22.5 kHz deviation @ 1 kHz) at 98.000
MHz.
r Set the transceiver to 98.000 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 "WFM SM LV
xxx."
r Press the key momentarily (you will hear a long
beep), then press and hold in the
hear a short beep).
r Turn the transceiver off.
VOR Section
VOR Sensitivity Adjustment
r Connect the Radio Tester to the antenna jack, and ad-
just its output level to +5 dBµ (with standard AM
modulation: 30 % AM modulation @ 1 kHz) at 108.000
MHz.
r Set the transceiver to 108.000 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 "VSTR Level
xxx."
r Press the key momentarily (you will hear a long
beep), then press and hold in the
hear a short beep).
r Turn the transceiver off.
Resetting the CPU
If you are unable to gain control of the transceiver
(or if you want to clear all memories and settings to
their factory defaults), press and hold in the
MONITOR switches while turning the transceiver
on.
16
VOR Sensitivity Hysteresis Adjustment
r Connect the Radio Tester to the antenna jack, and ad-
just its output level +5 dBµ (with standard AM modu-
lation: 30 % AM modulation @ 1 kHz) at 108.000 MHz.
r Set the transceiver to 108.000 MHz and turn the trans-
ceiver off.
r Press and hold in the PTT switch, MONITOR switch,
and
the alignment mode.
r Rotate the DIAL selector knob to select "VSTR HITH
xxx."
r Press the
beep), then press and hold in the
key (until you hear a short beep).
r Turn the transceiver off.
VOR Angle Adjustment
r Connect the Avionics Radio Tester to the antenna jack.
r Set the transceiver to 108.000 MHz, set up the "FROM"
mode (press
Avionics Radio Tester as shown below.
r Note the difference of the phase indication between
the Transceiver 's indication and Avionics Radio
Tester's indication, then turn the transceiver off.
r Press and hold in the PTT switch, MONITOR switch,
key (until you
and
the alignment mode.
r Rotate the DIAL selector knob to select "VOR Degree
xxx."
r Press the
beep), then set the difference value that is noted step 3
above, using the DIAL selector knob.
r Press and hold in the
beep).
r Turn the transceiver off.
and
key while turning the transceiver on to enter
key momentarily (you will hear a long
+ key, if necessary), and set the
Frequency: 108.000 MHz
Output Level: +40 dBµ
30 Hz VAR.: 30 %
9.96 kHz Carrier: 30 %
9.96 kHz MOD: 480 Hz
DIRECT: FROM
PHASE: 15 °
keys while turning the transceiver on to enter
key momentarily (you will hear a long
key (until you hear a short
key (until you