HP 8642A Operation And Calibration Manual page 254

Performance Tests Model
8642A/B
PERFORMANCE TESTS
4-4. ABBREVIATED PERFORMANCE TESTING
Limited Calibration:
Limited Calibration is a service offered by the Hewlett-Packard Company Service Centers that
involves on-site performance testing of the HP 8642 Synthesized Signal Generator.
It
is a
sub-set of the full Performance Tests in this section.
Self Test:
At power up the HP 8642 internal controller executes a 20 second operational check, which is
termed Self Test. The Self Test quickly evaluates the correctness of operation and provides the
operator with a 90% assurance that the HP 8642 is fully operational.
There is also an instrument level self test that evaluates the correctness of operation and provides
the operator with an 80% assurance that the HP 8642 is operating within its specifications.
Refer to the INSTRUMENT LEVEL SELF TEST undlOr the DIAGNOSTIC tab in Section VIII.
Post-Repair Pedormance Testing:
When the HP 8642 Module Exchange philosophy of repair is utilized by the customer,
Performance Testing is not required. Exchange modules are tested to levels of performance
specified to insure HP 8642 warranted performance and calibration. Refer to the diagnostics tab
in Section VIII for Module Replacement procedures.
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