Vertex Standard VX-6000 Alignment Manual

Alignment Alignment
Alignment 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
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
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
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.
technicians who are
regarding repair.
that more complex
Required Test Equipment Required Test Equipment Required 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
Dummy load
Inline Wattmater
Deviation Meter
Frequeuncy
Counter
Alignment Preparation & Precautions Alignment Preparation & Precautions
Alignment 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
temperature be the same as that of the transceiver
and test equipment, and that this temperature be held
Generator
RF Sampling
Coupler
Transceiver
CT-70
CT-29 Connection
Cable Power Supply
IBM PC 13.8V DC
COM port
requires that the ambient