Performance Tests 1
Keysight 53210A/53220A/53230A Assembly Level Service Guide 27
– To verify the total number of accuracy places for frequency measurements, it
may be necessary to turn off Auto-Digit control. Use this set of key depressions
to turn AutoDigits OFF:
[Digits] / (AutoDigits) / <Off>
– The softkey menus shown in the test procedures represent the functionality of
the 53230A. The softkey menus for the 53210A and 53220A may be different
depending on the function selected.
Recommended calibration cycle
The counter requires periodic verification of operation. Depending on the use and
environmental conditions, aging, and measurement accuracy required, the
counter should be checked using the operational verification procedure at least
once every year. The recommended calibration cycle for specification accuracy is
also one year.
Internal auto-calibration
An Internal Auto-Calibration feature is available (see Chapter 2, "Service") that
uses internal instrument standards to refine the accuracy of the counter. It is
recommended that Auto-Cal be performed regularly (such as at the beginning of a
shift change, starting a contemporary series of measurements, after a large
ambient temperature change, etc.) for optimum counter performance.
Auto-calibration is also a subset of the counter self-test.
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