Yaesu VX-2R Technical Supplement page 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.
12
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.