Alignment - Vertex Standard VXR-9000 Service Manual

Introduction
The VXR-9000 has been aligned at the factory for the spec-
ified performance across the entire frequency range spec-
ified. Realignment should therefore not be necessary ex-
cept in the event of a component failure. All component
replacement and service should be performed only by an
authorized Vertex Standard representative, or the war-
ranty 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 op-
eration, 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 au-
thorized Vertex Standard service technicians who are ex-
perienced 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 Vertex Standard
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, Vertex Standard
must reserve the right to change circuits and alignment
procedures in the interest of improved performance, with-
out 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 realign-
ment determined to be absolutely necessary. The follow-
ing test equipment (and thorough familiarity with its cor-
rect use) is necessary for complete realignment. Correc-
tion 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 fol-
low all of the steps in a section in the order presented.
VXR-9000 UHF Service Manual
Required Test Equipment
 RF Signal Generator with calibrated output level at 1
GHz
 AF Signal Generator
 Frequency Counter: ±0.2 ppm accuracy at 1 GHz
 In-line Wattmeter with 5% accuracy at 1 GHz
 50-ohm, 50-W RF Dummy Load (50 W mode) or 50-
ohm, 100-W RF Dummy Load (100 W mode)
 13.6V Regulated DC Power Supply with capable up to
15A (50 W mode) or 30A (100 W mode).
 AC Voltmeter
 DC Voltmeter
 UHF Sampling Coupler
 IBM
® PC/Compatible Computer with Microsoft
dows ® 98 or later operating system
 CE60 Programming Software
 Vertex Standard FIF-10A (or FIF-12) + CT-104A USB
Programming Interface
 Vertex Standard FRB-6 Tuning Interface Box and CT-
159 Connection Cable
Alignment Preparation & Precautions
A 50-ohm RF Dummy load and in-line wattmeter must
be connected to the main antenna jack in all procedures
that call for transmission, except where specified other-
wise. Correct alignment is not possible with an antenna.
After completing one step, read the following step to de-
termine 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 °C
and 30 °C (68 °F ~ 86 °F). When the transceiver is brought
into the shop from hot or cold air, it should be allowed
time to come to room temperature before alignment.
Whenever possible, alignments should be made with os-
cillator 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 this procedure are
based on 0 dBμ EMF = 1.0 μV.

Alignment

® Win-
G-1