Yaesu VX-3R, Technical Supplement

Page: 11 / 52

11
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 435.100 MHz (with 1
kHz tone @ ±3.5 kHz deviation).
P
Rotate the DIAL knob one click clockwise to select the align-
ment 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 435.100 MHz (with 1
kHz tone @ ±20 kHz deviation).
P
Rotate the DIAL knob one click clockwise to select the align-
ment 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 435.100 MHz (with 1
kHz tone @ ±20 kHz deviation).
P
Rotate the DIAL knob one click clockwise to select the align-
ment 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 align-
ment item "HHP".
P
Press the [
V/M
] key.
P
Press the PTT switch, then rotate the DIAL knob so that the
Wattmeter reading is 2.0 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 align-
ment item "HP".
P
Press the [
V/M
] key.
P
Press the PTT switch, then rotate the DIAL knob so that the
Wattmeter reading is 1.0 W ±0.1 W.
P
Press the [
V/M
] key again.
Low TX Power Adjustment
P
Connect the 50-Ohm Dummy Load and Wattmeter to the
ANT jack.
P
Rotate the DIAL knob one click clockwise to select the align-
ment item "LP".
P
Press the [
V/M
] key.
P
Press the PTT switch, then rotate the DIAL knob so that the
Wattmeter reading is 0.1 W ±0.05 W.
P
Press the [
V/M
] key again.
MAX Deviation Adjustment
P
Connect the 50-Ohm Dummy Load, Wattmeter, and Devia-
tion Meter to the ANT jack.
P
Connect the AF Generator to the MIC/SP jack, and then set
the output level to 50 mV at 1 kHz.
P
Rotate the DIAL knob one click clockwise to select the align-
ment item "dEV".
P
Press the [
V/M
] key.
P
Press the PTT switch, then rotate the DIAL knob so that the
Deviation meter reading is 4.2 kHz ±0.1 kHz.
P
Press the [
V/M
] key again.
CTCSS Tone Deviation Adjustment
P
Connect the 50-Ohm Dummy Load, Wattmeter, and Devia-
tion Meter to the ANT jack.
P
Rotate the DIAL knob one click clockwise to select the align-
ment item "100".
P
Press the [
V/M
] key.
P
Press the PTT switch, then rotate the DIAL knob so that the
Deviation meter reading is 0.65 kHz ±0.05 kHz.
P
Press the [
V/M
] key again.
DCS Deviation Adjustment
P
Connect the 50-Ohm Dummy Load, Wattmeter, and Devia-
tion Meter to the ANT jack.
P
Rotate the DIAL knob one click clockwise to select the align-
ment item "dCS".
P
Press the [
V/M
] key.
Press the PTT switch, then rotate the DIAL knob so that the
Deviation meter reading is 0.65 kHz ±0.05 kHz.
P
Press the [
V/M
] key again.
Alignment