Model 8640B
TM 9-4935-601-14-7&P
SECTION IV
PERFORMANCE TESTS
4-1. INTRODUCTION
4-2. The procedures in this section test the instrument's
electrical performance using the specifications of Table
1-1 as the performance standards. A simpler
operational test is included in Section III under
Operator's Checks.
4-3. EQUIPMENT REQUIRED
4-4. Equipment required for the performance tests is
listed in the Recommended Test Equipment table in
Section I. Any equipment that satisfies the critical
specifications given in the table may be substituted for
the recommended model(s).
4-5. TEST RECORD
4-6. Results of the performance tests may be tabulated
on the Test Record at the end of the procedures. The
Test Record lists all of the tested specifications and their
acceptable limits. Test results recorded at incoming
inspection can be used for comparison in periodic
maintenance and troubleshooting and after repairs or
adjustments.
4-7. TEST PROCEDURES
4-8. It is assumed that the person performing the
following tests understands how to operate the specified
test equipment. Equipment settings, other than those
for the Model 8640B, are stated in general terms. For
example, a test might require that a spectrum analyzer's
resolution bandwidth be set to 100 Hz; however, the
time per division setting would not be specified and the
operator would set that control so that the analyzer
operates correctly.
4-9. It is also assumed that the person performing the
tests will supply whatever cables, connectors, and
adapters are necessary. The Test Accessories table in
Section I lists the requirements for some of these items.
4-10. Unless otherwise specified, set the following
controls as shown:
TIME BASE INT/EXT (on rear panel) ........................INT
TIME BASE VERNIER .............................................CAL
Use FINE TUNE in conjunction with FREQUENCY
TUNE to set whatever frequency is required. Use the
COUNTER MODE EXPAND controls whenever
necessary to obtain required counter resolution.
CAUTION
To avoid the possibility of damage to
test equipment, read completely
through each test before starting it.
Make any preliminary control
settings necessary for correct test
equipment operation.
NOTE
Table 4-2 contains a list of recommended abridgments to the performance tests. The
abridgments suggest rapid and relatively inexpensive ways to test the instrument while retaining
those tests which are considered of prime importance in characterizing the generator. Where
alteration of a test is recommended, a justification (remark) is also given. Should individual
needs make the justification invalid, the test should be performed in its entirety. (E.g., the
Incidental AM Test, sometimes known as AM on FM, has been omitted as being of secondary
importance. Should your application require characterization of this specification, the test
should be performed.)
4-1
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