Yaesu VX-2R, Technical Supplement

Page: 12 / 44

12
Alignment
Internal System Alignment Routine
This process uses a programmed routine in the transceiv-
er which simplifies many previously complex discrete
component settings and adjustments with digitally-con-
trolled settings via front panel keys and LCD indications.
Set the transceiver to the 430MHz band, then turn the
transceiver off. Now, press and hold in the [
F/W
], [
MD
],
and [ ] keys (at the same time) while powering the radio
on again. The display will show the first setting. Thereaf-
ter, the frequencies used during alignment will automat-
ically be set without further action by the technician.
In the alignment process, each adjustment is selected by
rotating the
DIAL
knob. Alignment is performed by:
¦
Pressing the [
V/M
] key;
¦
Injecting a signal of the required frequency and level;
then
¦
Pressing the [
V/M
] key after a level setting or adjust-
ment is made. This second pressing of the [
V/M
] key
stores the alignment data at the desired value.
To exit the alignment routine, press the [
HM/RV
] key. Af-
ter performing the system alignment in its entirety, indi-
vidual settings can be returned to and adjusted should
the need arise.
PLL Reference Frequency (PLL REF)
r
Press the [
V/M
] key.
r
Transmit, and adjust the counter frequency to within
±300 Hz by rotating the
DIAL
knob; now press the
[
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.
430 MHz Band Alignment
Squelch Hysteresis Adjust (HIS)
r
Press the [
V/M
] key.
r
Rotate the
DIAL
knob for minimum squelch hysteresis,
then press the [
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.
Squelch Preset Threshold (tHL)
r
Press the [
V/M
] key.
r
Inject a 435.1 MHz, –12 dBµ RF signal (1 kHz tone @
±3.5 kHz deviation) to the
ANT
jack, then press the
[
F/W
] key.
r
Press the [
F/W
] key again, then press the [
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.
Squelch Preset Tight (tIg)
r
Press the [
V/M
] key.
r
Adjust the generator level for a –5 dBµ signal (leaving
the modulation level unchanged), then press the
[
F/W
] key.
r
Press the [
F/W
] key again, then press the [
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.
Low-Scale S-1 Adjustment (S1)
r
Press the [
V/M
] key.
r
Adjust the generator level to –7 dBµ (leaving the modu-
lation level unchanged), then press the [
F/W
] key.
r
Press the [
F/W
] key again, then press the [
V/M
]] key.
r
Rotate the
DIAL
knob to select the next setting.
S-Meter Full-Scale Adjustment (S9)
r
Press the [
V/M
] key.
r
Adjust the generator level to +20 dBµ (leaving the
modulation level unchanged), then press the [
F/W
] key.
r
Press the [
F/W
] key again, then press the [
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.
Wide FM Low-Scale S-1 Adjustment (S1)
r
Press the [
V/M
] key.
r
Adjust the generator level to 0 dBµ (1 kHz tone @ ±20
kHz deviation), then press the [
F/W
] key.
r
Press the [
F/W
] key again, then press the [
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.
Wide FM S-Meter Full-Scale Adjustment (S9)
r
Press the [
V/M
] key.
r
Adjust the generator level to +20 dBµ (leaving the
modulation level unchanged from the previous step),
then press the [
F/W
] key.
r
Press the [
F/W
] key again, then press the [
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.
TX High Power (Low Band Edge @6.0 V) Adjustment (HHP)
r
Set the DC power supply voltage to 6.0 V.
r
Press the [
V/M
] key.
r
Transmit, and adjust the output power level for 2.0 W
(±0.2 W) by rotating the
DIAL
knob, then press the
[
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.
TX High Power (Low Band Edge @4.4 V) Adjustment (LHP)
r
Set the DC power supply voltage to 4.4 V.
r
Press the [
V/M
] key.
r
Transmit, and adjust the output power level for 1.0 W
(±0.1 W) by rotating the
DIAL
knob, then press the
[
V/M
] key.
r
Rotate the
DIAL
knob to select the next setting.