Specifications

Chapter 5 103
Disassembly
Assembly Replacements
Assembly Replacements
With some assemblies you will receive a memory card that contains
factory-generated calibration data for that assembly. For new
replacements, there will also be an instruction sheet for loading the
calibration data into your Test Set.
External equipment is not required for running the diagnostic routines.
If diagnostic routines cannot isolate the problem, an oscilloscope,
voltmeter, and spectrum analyzer may be required for further
troubleshooting. A second Test Set is helpful for troubleshooting
performance test failures.
Table 3-2 on page 75 and Table 7-1 on page 159 show which assemblies
need calibration data as well as which performance tests and periodic
self-calibration adjustments are recommended after replacing an
assembly.
NOTE Periodic Adjustment Intervals
The adjustment programs Periodic Calibration, IQ Calibration, and
Eb/No Calibration should be performed after any assembly referred to
in Table 7-1 on page 159 is replaced, or at least every 24 months. These
program can be run anytime to optimize the performance of the Test
Set. See Chapter 7 , “Periodic Adjustments,” on page 157 for details.
NOTE Performance Test Intervals
The performance tests in Chapter 8 , “Performance Tests,” on page 173
should be performed when certain assemblies are repaired or replaced,
or at least every 24 months. See Table 3-2 on page 75 for those
assemblies requiring performance testing/calibration.
Replacement Parts
For replacement part numbers, see Chapter 6 , “Replaceable Parts,” on
page 135. For cable routing information refer to Table 5-2 on page 130.