Vertex Standard VX-6000 User manual

Alignment
AlignmentAlignment
Alignment
The VX-6000 has been carefully aligned at the factory
for the specified performance across the frequency
range specified for each version.
Realignment should therefore not be necessary
except in the event of a component failure, or
alteration of version. All component replacement and
service should be performed only by an authorized
Yaesu representative, or the warranty policy may be
voided.
The following procedures cover the sometimes critical
and tedious adjustments that are not normally
required once the transceiver has left the factory.
However, if damage occurs and some parts 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. Therefore, 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 must
reserve 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 the need for realignment determined to be
absolutely necessary. The following test equipment
(and thorough familiarity with its correct 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 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
Required Test EquipmentRequired Test Equipment
Required Test Equipment
□
□
□RF signal generator: calibrated output level at
1000 MHz (0 dBµ =1.0 µV - terminated circuit)
□
□
□Deviation Meter (linear detector)
□
□
□AF Millivoltmeter
□
□
□
SINAD Meter
□
□
□Inline Wattmeter with 5% accuracy at 1000 MHz
□
□
□Regulated DC Power Supply: adjustable from 10
to 17 VDC, 30A
□
□
□50-ohm Non-reactive Dummy Load: 200W at
1000 MHz
□
□
□Frequency Counter: >0.1 ppm accuracy at 1000
MHz
□
□
□AF Signal Generator
□
□
□DC Voltmeter: high impedance
□
□
□RF Sampling Coupler(attenuation pad)
□
□
□AF Dummy Load: 4 ohm, 20W
□
□
□
Oscilloscope
□
□
□
Spectrum Analyzer
□
□
□
IBM PC/compatible computer w/Yaesu CT-71
programming cable and CE-35 channel programming
editor.
50-
Ω RF Signal
Dummyload Generator
RFSampling
InlineWattmater Coupler
Transceiver
DeviationMeter CT-70
CT-29Connection
Frequeuncy Cable PowerSupply
Counter IBMPC 13.8VDC
COMport
Alignment Preparation & Precautions
Alignment Preparation & PrecautionsAlignment Preparation & Precautions
Alignment Preparation & Precautions
A dummy load and inline wattmeter must be
connected to the main antenna jack in all procedures
that call for transmission, except where specified
otherwise. Correct alignment is not possible with an
antenna. After completing one step, read the following
step to determine whether the same test equipment
will be 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 and 30 ℃(68 86F). When the
transceiver is brought into the shop from hot or cold
air it should be allowed some time for thermal
equalization with the environment before alignment.
If 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.
Before beginning, connect the transceiver and PC
using the CT-71 programming cable as described in
the EEPROM Programming chapter, and download
the EEPROM data from the transceiver to the
computer.
Store this data in a disk file so that it can be saved
and retrieved later. Using the table below, program
the channel, CTCSS, and DCS alignment settings for
your transceiver version. Upload this file to the
transceiver.
Note: Signal levels in dB referred to in this procedure
are based on 0 dBm = 0.5 mV(terminated circuit).
Caution:
Caution:Caution:
Caution: Do not connect this line to ground, and be
certain that the speaker has adequate capability to
handle the audio output from the radio.
Because of the bridge audio amplifier circuit used
in the radio, it is necessary to construct and use a
simple audio load test adapter as shown in the
schematic diagram above, when conducting
receiver alignment steps.
3.5
φPLUG
Attenuated
Test
Output(1/2)
2
Ω10W
Ground
+ 470uF
2
Ω10W
AFTestAdapterSchematic
Alignment Channel Frequencies
Alignment Channel FrequenciesAlignment Channel Frequencies
Alignment Channel Frequencies
VHF TYPE C
Channel Frequency
(simplex) CTCSS Encode DCS Encode Narrow /wide
CH1 148.01MHz None None Wide
CH2 161.01MHz None None Wide
CH3 173.99MHz None None Wide
CH4 148.01MHz None None Narrow
CH5 161.01MHz None None Narrow
CH6 173.99MHz None None Narrow
CH7 161.01MHz 151.4Hz None Wide
CH8 161.01MHz None 023 Wide
CH9 161.01MHz 151.4Hz None Narrow
CH10 161.01MHz None 023 Narrow
UHF TYPE D
Channel Frequency
(simplex) CTCSS Encode DCS Encode Narrow /wide
CH1 450.01MHz None None Wide
CH2 465.01MHz None None Wide
CH3 479.99MHz None None Wide
CH4 450.01MHz None None Narrow
CH5 465.01MHz None None Narrow
CH6 479.99MHz None None Narrow
CH7 465.01MHz 151.4Hz None Wide
CH8 465.01MHz None 023 Wide
CH9 465.01MHz 151.4Hz None Narrow
CH10 465.01MHz None 023 Narrow
PLL & Transmitter
PLL & TransmitterPLL & Transmitter
PLL & Transmitter
Set up the test equipment as shown for transmitter
alignment.
Maintain the supply voltage at 13.8V DC for all steps.
PLL VCV
PLL VCVPLL VCV
PLL VCV
□
□
□
Connect the positive lead of the DC voltmeter to
the test point TP1013 (VCV) on the Main Unit, as
indicated in the figure, and the negative lead to
chassis ground.
□
□
□
Set the transceiver to the high band edge frequency
channel, then adjust trimmer-capaciter on the Unit for
4.2 V on the voltmeter.
VHF: TC1016 / UHF: TC1002
□
□
□
Key the transmitter, and adjust trimmer-capacitor
on the Unit for 4.2 V on the voltmeter.
VHF: TC1017 / UHF: TC1003
□
□
□Next select to the low edge frequency channel and
confirm about 1.0 V(0.8V – 1.2V) on the voltmeter.
□
□
□

Key the transmitter, and confirm about 1.0 V(0.8V
– 1.2V) on the voltmeter.
PLL Reference Frequency
PLL Reference FrequencyPLL Reference Frequency
PLL Reference Frequency
With the wattmeter, dummy load and frequency
counter connected to the antenna jack, and select band
center frequency channel, key the transmitter and
adjust TC1001 on the Main Unit, if necessary, so the
counter frequency is within 100 Hz of the channel

center frequency for the transceiver version.
Transmitter Output Power (VHF)
□
□
□
Select band center frequency channel, and select
high power output level.
Key the transmitter and adjust by control commands
for high power from the computer for (VHF:110
UHF:100) ± 2 Watts as indicated on the wattmeter.
□
□
□
Select band center frequency channel, and select
low power output level.
Key the transmitter and adjust by control commands
for low power from the computer for 50 ±1 Watts as
indicated on the wattmeter.
Transmitter Deviation
Transmitter DeviationTransmitter Deviation
Transmitter Deviation
Microphone Audio Modulation Level
Microphone Audio Modulation LevelMicrophone Audio Modulation Level
Microphone Audio Modulation Level
□
□
□
Select band center frequency channel, and adjust
the AF generator for 25mV(-30dBm) output at 1 kHz
to the microphone jack.
□
□
□Key the transmitter and adjust by control
commands for maximum deviation from the
computer for 4.2kHz ± 0.05kHz deviation as
indicated on the deviation meter.
CTCSS Modulation Level
□
□
□
Select band center frequency channel, with 151.4
Hz CTCSS encode, and reduce the AF generator
injection to zero.
□
□
□Key the transmitter and adjust by control
commands for CTCSS deviation from the computer
for 0.7kHz ± 0.05kHz deviation as indicated on the
deviation meter.
DCS Modulation Level
□
□
□Select band center frequency channel, with DCS 023
enabled, reduce the AF generator injection to zero.
□
□
□Key the transmitter and adjust by control
commands for DCS deviation from the computer for
0.7 kHz ± 0.05 kHz deviation as indicated on the
deviation meter.
Receiver
ReceiverReceiver
Receiver
□
□
□ Set up the test equipment as shown for receiver
alignment, and construct the audio test adapter as
described in the box below.
□
□
□ With the transceiver set to band center frequency
channel, and the RF signal generator tuned to the
same frequency, set the generator for ±3.0kHz
deviation (for 25kHz steps) with 1kHz tone
modulation, and set the output level for 1μV at the
antenna jack.
□
□
□Adjust by control commands for tune from the
computer for optimum SINAD, reducing signal
generator output level as necessary for proper meter
deflection.
□
□
□After the previous step, final signal generator level
should be less than 0.25μV for 12dB SINAD.
Squelch Threshold
□
□
□
Select band center frequency channel, and the RF
signal generator turned to the same frequency, set the
generator for ±3.0 kHz deviation with 1kHz tone
modulation, and set the output level for -8dBμat the
antenna jack.
□
□
□Adjust the squelch threshold level by control
commands for squelch threshold from the computer so
that it just closes (BUSY
BUSYBUSY
BUSY LED turns off).