Yaesu VX-3R Сервис-мануал - Manual (Page 13)

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 dBμV 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 dBμV 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 dBμV 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 dBμV 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 dBμV 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 dBμV 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 dBμV 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.