Vertex Standard VX-2R User manual

FCC ID: K66VX-2R
Alignment
Vertex Standard Co., Ltd.
1
VX-2R Alignment
Introduction
The VX-2R is carefully aligned at the factory for the specified performance across
the amateur band. Realignment should therefore not be necessary except in the
event of a component failure. Only an authorized Yaesu representative should
perform all component replacement and service, or the warranty policy may be
void. The following procedures cover the adjustments that are not normally
required once the transceiver has left the factory. However, if damage occurs and
some parts subsequently are replaced, realignment may be required. If a sudden
problem occurs during normal operation, it is likely due to component failure;
realignment should not be done until after the faulty component has been
replaced.
We recommend that servicing be performed only by authorized Yaesu service
technicians who are experienced with the circuitry and fully equipped for repair
and alignment. If a fault is suspected, contact the dealer from whom the
transceiver was purchased for instructions regarding repair. Authorized Yaesu
service technicians realign all circuits and make complete performance checks to
ensure compliance with factory specifications after replacing any faulty
components. Those who do undertake any of the following alignments are
cautioned to proceed at their own risk. Problems caused by unauthorized attempts
at realignment are not covered by the warranty policy. Also, Yaesu reserves the
right to change circuits and alignment procedures in the interest of improved
performance, without notifying owners.
Under no circumstances should any alignment be attempted unless the normal
function and operation of the transceiver are clearly understood, the cause of the
malfunction has been clearly pinpointed and any faulty components replaced, and
realignment determined to be absolutely necessary.
The following test equipment (and familiarity with its use) is necessary for
complete realignment. Correction of problems caused by misalignment resulting
from use of improper test equipment is not covered under the warranty policy.
While most steps do not require all of the equipment listed, the interactions of
some adjustments may require that more complex adjustments be performed
afterwards.
Do not attempt to perform only a single step unless it is clearly isolated

FCC ID: K66VX-2R
Alignment
Vertex Standard Co., Ltd.
2
electrically from all other steps. Have all test equipment ready before beginning
and, follow all of the steps in a section in the order presented.
Required Test Equipment
□RF Signal Generator with calibrated output level at 500 MHz
□Deviation Meter (linear detector)
□In-line Wattmeter with 5% accuracy at 500 MHz
□50-Ω, 10-W RF Dummy Load
□8-ΩAF Dummy Load
□Regulated DC Power Supply adjustable from 3 to 15 VDC, 2A
□Frequency Counter: 0.2-ppm accuracy at 500 MHz
□AF Signal Generator
□AC Voltmeter
□DC Voltmeter: high impedance
□VHF Sampling Coupler
□SINAD Meter
Alignment Preparation & Precautions
A 10-W RF load and in-line wattmeter must be connected to the main antenna
jack in all procedures that call for transmission, alignment is not possible with an
antenna. After completing one step, read the next step to see if the same test
equipment is required. If not, remove the test equipment (except dummy load and
wattmeter, if connected) before proceeding.
Correct alignment requires that the ambient temperature be the same as that of
the transceiver and test equipment, and that this temperature be held constant
between 20~30°C (68~86°F). When the transceiver is brought into the shop from hot
or cold air, it should be allowed some time to come to room temperature before
alignment. Whenever possible, alignments should be made with oscillator shields
and circuit boards firmly affixed in place. Also, the test equipment must be
thoroughly warmed up before beginning.
Note:
Signal levels in dB referred to in the alignment procedure are based on 0dBm=0.5 μ V.

FCC ID: K66VX-2R
Alignment
Vertex Standard Co., Ltd.
3
Test Setup
Set up the test equipment as shown below for transceiver alignment, apply 6 V
DC power to the transceiver. Refer to the drawings for Alignment Points.
Internal System Alignment Routine
This uses a programmed routine in the transceiver which simplifies many
previously complex discrete component settings and adjustments with digitally-
controlled settings via front panel buttons and LCD indications.
To begin, set the transceiver to the center of the 50MHz, 144MHz, 220MHz and
430MHz bands. Next, select the 430MHz band, then turn the transceiver off.
Now, press and hold the [BAND], [H/L] and [V/M] button together while
powering the radio on again. The display will show the first setting.
Note that the first few settings are not adjustable and are left as set from the
factory.
In the alignment process, each adjustment is selected by rotating the DIAL.
Alignment is performed by:
○ Pressing the [V/M] button;
○ Injecting a signal of the required frequency and level; then
○ Pressing the [V/M] button after a level setting or adjustment is made. This
second pressing of the [V/M] button store the entry.
To exit the alignment routine, press the [HM/RV] button. After performing the
system alignment in its entirety, individual settings can be returned to and adjust
should the need arise
In the section to follow, typical default values (as set at the factory) are shown in
brackets (e.g. [119]), to serve as a general guideline. As each transceiver is
individually optimized at the factory, the precise settings for the transceiver on
your bench may be slightly different.

FCC ID: K66VX-2R
Alignment
Vertex Standard Co., Ltd.
4
PLL Reference Frequency (PLL REF)
Transmit and adjust the counter frequency for within ±300Hz by rotating the
DIAL, then press the [V/M] button. Rotate the DIAL to select the next setting.
430MHz band Alignment
○ Squelch Hysteresis Adjust (HIS)
Rotate the DIAL for minimum squelch hysteresis, then press the [V/M] button.
Rotate the DIAL to select the next setting.
○ Squelch Preset Threshold (tHL)
Inject a -15dBµ RF signal (1 kHz tone @ ±3.5kHz deviation), then press the [V/M]
button. Rotate the DIAL to select the next setting.
○ Squelch Preset Tight (tIg)
Adjust the generator level for a -4dBµ signal, then press the [V/M] button. Rotate
the DIAL to select the next setting.
○ Low-Scale S-1 Adjustment (S1)
Adjust the generator level to -7dBµ (1 kHz tone @ ±3.5kHz deviation), then press
the [V/M] button. Rotate the DIAL to select the next setting.
○ S-Meter Full-Scale Adjust (S9)
Adjust the generator level to +20dBµ (1 kHz tone @ ±3.5kHz deviation), then press
the [V/M] button. Rotate the DIAL to select the next setting.
○ Wide Low-Scale S-1 Adjustment (S1)
Adjust the generator level to 0dBµ (1 kHz tone @ ±20kHz deviation), then press
the [V/M] button. Rotate the DIAL to select the next setting.
○ Wide S-Meter Full-Scale Adjust (S9)
Adjust the generator level to +20dBµ (1 kHz tone @ ±20kHz deviation), then press
the [V/M] button. Rotate the DIAL to select the next setting.
○ High TX Power Adjust (HPo)
Transmit and adjust the output power level for 2W ±0.3W by rotating DIAL, then
press the [V/M] button. Rotate the DIAL to select the next setting.
○ Low TX Power Adjust (LPo)
Transmit and adjust the output power level for 50 mW ±30 mW by rotating DIAL,
then press the [V/M] button. Rotate the DIAL to select the next setting.
○ TX Deviation Adjustment (dEV)
Transmit and adjust the deviation for 4.2KHz ±0.2KHz by rotating DIAL, then
press the [V/M] button. Rotate the DIAL to select the next setting.
This completes the UHF band internal alignment routine, to save all settings and
exit, press [BAND] button.

FCC ID: K66VX-2R
Alignment
Vertex Standard Co., Ltd.
5
144MHz band Alignment
○ Squelch Hysteresis Adjust (HIS)
Rotate the DIAL for minimum squelch hysteresis, then press the [V/M] button.
Rotate the DIAL to select the next setting.
○ Squelch Preset Threshold (tHL)
Inject a -15dBµ RF signal (1 kHz tone @ ±3.5kHz deviation), then press the [V/M]
button. Rotate the DIAL to select the next setting.
○ Squelch Preset Tight (tIg)
Adjust the generator level for a -4dBµ signal, then press the [V/M] button. Rotate
the DIAL to select the next setting.
○ Low-Scale S-1 Adjustment (S1)
Adjust the generator level to -7dBµ (1 kHz tone @ ±3.5kHz deviation), then press
the [V/M] button. Rotate the DIAL to select the next setting.
○ S-Meter Full-Scale Adjust (S9)
Adjust the generator level to +20dBµ (1 kHz tone @ ±3.5kHz deviation), then press
the [V/M] button. Rotate the DIAL to select the next setting.
○ Wide Low-Scale S-1 Adjustment (S1)
Adjust the generator level to 0dBµ (1 kHz tone @ ±20kHz deviation), then press
the [V/M] button. Rotate the DIAL to select the next setting.
○ Wide S-Meter Full-Scale Adjust (S9)
Adjust the generator level to +20dBµ (1 kHz tone @ ±20kHz deviation), then press
the [V/M] button. Rotate the DIAL to select the next setting.
○ High TX Power Adjust (HPo)
Transmit and adjust the output power level for 3W ±0.3W by rotating DIAL, then
press the [V/M] button. Rotate the DIAL to select the next setting.
○ Low TX Power Adjust (LPo)
Transmit and adjust the output power level for 50mW ±30mW by rotating DIAL,
then press the [V/M] button. Rotate the DIAL to select the next setting.
○ TX Deviation Adjustment (dEV)
Transmit and adjust the deviation for 4.2KHz ±0.2KHz by rotating DIAL, then
press the [V/M] button. Rotate the DIAL to select the next setting.
This completes the UHF band internal alignment routine, to save all settings and
exit, press [BAND] button.