Nautel V10, Руководство пользователя по установке и эксплуатации

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V10/V7.5/V5/V3.5 Installation and Operation Manual
Page 4-1
Section 4 Testing and Adjustment Issue 3.5
V10/V7.5/V5/V3.5
INSTALLATION AND OPERATION MANUAL
Section 4 TESTING AND ADJUSTMENT
4.1 INTRODUCTION
This section contains step-by-step
functional test procedures, using integral
meters and precision test/monitoring
equipment. The test procedures contain
routine adjustment instructions to bring the
parameter being tested within defined
limits, where appropriate.
NOTE
Personnel who are not familiar with
detailed circuit theory or do not realize the
impact a specific adjustment will have on
other steps should follow the instructions in
the order they are presented. These
adjustments should be performed during
initial turn-on and after major repairs or a
frequency change.
4.2 OPERATING PRECAUTIONS
The transmitter contains protection circuits
that monitor critical parameters. When the
defined limits of any of these parameters
are exceeded, one or more of the
transmitter’s front panel
System Diagram
lamps will turn on (red). When the alarm
condition could result in excessive power
amplifier stress current, the control voltage
applied to the power amplifiers will
effectively be reduced or turned off, as long
as the cause of the out-of-tolerance
condition exists. Maintainers should read
and fully understand the
Operating
Instructions section, and in particular the
controls and indicators section.
NOTE
The diagnostic display’s main screen
displays three pre-determined parameters
(e.g., forward power, PA voltage, total PA
current, etc.). All transmitter parameters, in
combinations of three, may be displayed
on this screen. See paragraph 3.6.8.
4.3 FUNCTIONAL TESTS
Successful completion of the following
tests will verify the transmitter circuits are
within factory specifications. When a
routine adjustment will correct an out-of-
tolerance condition, the adjustment
procedure is included.
NOTE
If an in-tolerance condition cannot be
attained with the specified routine
adjustment, discontinue testing until the
problem causing the out-of-tolerance
condition is corrected.
4.3.1 General
The functional tests should be performed
as a routine part of scheduled maintenance
checks and as the first step in
troubleshooting procedures. These results
should be recorded for comparison with
past and future test results.
The functional test procedures are
provided in a step-by-step format. This
method of presentation permits a person
who is unfamiliar with the transmitter to
perform the functional tests in a logical
sequence. Nautel recommends the
procedures be completed in sequence, as
each procedure establishes switch settings
and contains prerequisites for subsequent
procedures.
The following assume the initial turn-on
procedure detailed in Section 2 has been
completed during initial installation or after
major repairs that warrant repeating the
initial start-up procedure.