Performance Verification Overview 1
Keysight U8903B Service Guide 19
Self-Test
A brief power-on self-test occurs automatically whenever you turn on the U8903B. This
limited test assures that the U8903B is capable of operation.
If the self-test fails, the error message can be accessed via the front panel. Alternatively,
you can send the SYSTem:ERRor? query from the remote interface. Refer to the U8903B
Performance Audio Analyzer Programmer’s Reference for more information on the error
messages.
Self-test may be initiated remotely by sending the *TST? query to the U8903B. Always
ensure that the self-test passes before proceeding with any performance verification test.
If all tests pass, you have a high confidence that the U8903B is operational.
Keysight Calibration Services
When your U8903B is due for calibration, contact your local Keysight Service Center for a
low-cost recalibration. The U8903B is supported on automated calibration and adjustment
systems, which allow Keysight to provide this service at competitive prices.
Calibration Interval
A one-year interval is adequate for most applications. Accuracy specifications are
warranted only if calibration is made at regular calibration intervals. Accuracy
specifications are not warranted beyond the one-year calibration interval. Keysight does
not recommend extending calibration interval beyond the recommended calibration
interval for any application.
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