Vertex Standard VX-3 E, Technical Supplement

Page: 13 / 44

13
Alignment
144 MHz Band
Press the [
BAND
] button to switch the alignment band to
144 MHz Band.
RX Tune Adjustment
P
Connect the RF Signal Generator to the ANT jack, and
then set the output level to -10 dB μ V at the 145.100 MHz
(with 1 kHz tone @ ±3.5 kHz deviation).
P
Connect the SINAD meter to the MIC/SP jack
P
Rotate the DIAL knob clockwise until the alignment
item "tUn" appears.
P
Press the [
V/M
] key.
P
Rotate the DIAL knob for minimum defection of the
SINAD meter.
P
Press the [
V/M
] key again.
Squelch Threshold Adjustment
P
Connect the RF Signal Generator to the ANT jack, and
then set the output level to -12 dB μ V at the 145.100 MHz
(with 1 kHz tone @ ±3.5 kHz deviation).
P
Rotate the DIAL knob counter-clockwise until the align-
ment item "tHL" appears
P
Press the [
V/M
] key.
P
Press the [
F/W
] key twice, and then press the [
V/M
] key
again.
Squelch Tight Adjustment
P
Connect the RF Signal Generator to the ANT jack, and
then set the output level to -5 dB μ V at the 145.100 MHz
(with 1 kHz tone @ ±3.5 kHz deviation).
P
Rotate the DIAL knob one click clockwise to select the
alignment item "tIg".
P
Press the [
V/M
] key.
P
Press the [
F/W
] key twice, and then press the [
V/M
] key
again.
NFM S-Meter S-1 Adjustment
P
Connect the RF Signal Generator to the ANT jack, and
then set the output level to -7 dB μ V at the 145.100 MHz
(with 1 kHz tone @ ±3.5 kHz deviation).
P
Rotate the DIAL knob one click clockwise to select the
alignment item "S1".
P
Press the [
V/M
] key.
P
Press the [
F/W
] key twice, and then press the [
V/M
] key
again.
NFM S-Meter Full Scale Adjustment
P
Connect the RF Signal Generator to the ANT jack, and
then set the output level to +20 dB μ V at the 145.100 MHz
(with 1 kHz tone @ ±3.5 kHz deviation).
P
Rotate the DIAL knob one click clockwise to select the
alignment item "S9".
P
Press the [
V/M
] key.
P
Press the [
F/W
] key twice, and then press the [
V/M
] key
again.
WFM S-Meter S-1 Adjustment
P
Connect the RF Signal Generator to the ANT jack, and
then set the output level to 0 dB μ V at the 145.100 MHz
(with 1 kHz tone @ ±20 kHz deviation).
P
Rotate the DIAL knob one click clockwise to select the
alignment item "S1".
P
Press the [
V/M
] key.
P
Press the [
F/W
] key twice, and then press the [
V/M
] key
again.
WFM S-Meter Full Scale Adjustment
P
Connect the RF Signal Generator to the ANT jack, and
then set the output level to +20 dB μ V at the 145.100 MHz
(with 1 kHz tone @ ±20 kHz deviation).
P
Rotate the DIAL knob one click clockwise to select the
alignment item "S9".
P
Press the [
V/M
] key.
P
Press the [
F/W
] key twice, and then press the [
V/M
] key
again.
High TX Power Adjustment
P
Connect the 50-Ohm Dummy Load and Wattmeter to
the ANT jack.
P
Increase the DC power supply voltage to 6.0 V
P
Rotate the DIAL knob one click clockwise to select the
alignment item "HHP".
P
Press the [
V/M
] key.
P
Press the PTT switch, then rotate the DIAL knob so that
the Wattmeter reading is 2.9 W ±0.1 W.
P
Reduce the DC power supply voltage to 4.4 V
P
Rotate the DIAL knob one click clockwise to select the
alignment item "HP".
P
Press the [
V/M
] key.
P
Press the PTT switch, then rotate the DIAL knob so that
the Wattmeter reading is 1.5 W ±0.1 W.
P
Press the [
V/M
] key again.