Keysight Infiniium 8000 Series, Service Manual

Page: 38 / 162

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Testing Performance
The procedures in this section test measurement performance using performance
specifications.
Testing Interval
The performance test procedures may be performed for incoming inspection of
the oscilloscope and should be performed periodically thereafter to ensure and
maintain peak performance. The recommended test interval is yearly or every
2,000 hours of operation.
See Also
See Chapter 4, “Calibrating and Adjusting,” for information about the calibration
cycle.
Equipment Required
Equipment required for each test is listed in the test. Any equipment satisfying
the critical specifications listed may be substituted for the recommended model.
The procedures are based on the model or part number recommended.
Self- Test Verification
To verify system operation with high confidence, without the test equipment
and time required for performance tests, perform the self- tests. These internal
tests verify many functions of the oscilloscope.
To run the self- tests, enable the graphical interface, then select Self Test from
the Utilities menu. The Self Test drop down list box allows you to select
oscilloscope Self Tests, Key and Knob Test, or LED Test. A message is displayed
with the instruction to remove all inputs to the oscilloscope. During execution
of the self- tests, the oscilloscope displays diagnostic messages indicating the
status of each test.
If one of the self- tests fails,
FAILED
is displayed rather than
PASSED
, and a 16-
bit diagnostic code is displayed. This code is used by factory service personnel
when troubleshooting the main assembly. Failure of a self- test indicates an
assembly failure. The assembly must be replaced before you attempt performance
verification. For more troubleshooting information, refer to see “Troubleshooting”
on page 71.
Test Record
You can record the results of the performance tests in the Performance Test
Record provided at the end of this chapter. The Performance Test Record lists
the performance tests and provides an area to mark test results. You can use
the results recorded at incoming inspection for later comparisons during periodic
maintenance, troubleshooting, and after repairs or adjustments.
Test Interval Dependencies
The test interval depends on frequency and severity of use and the environmental conditions under which
the oscilloscope is used. In recording test results, you may find that the test interval could be shortened or
lengthened; however, such a decision should be based on substantial quantitative data.