Agilent 34970A/34972A Data Acquisition / Switch Unit

Chapter 6 Service
Self-Test Procedures
Self-Tests
A complete self-test performs the following tests. A failing test is
indicated by the test number and description in the display. For a
complete list of error messages, see Chapter 5 in the Agilent 34970A/
34972A User’s Guide.
601 Front panel not responding The main CPU A1U205 attempts to
establish serial communications with the front panel processor A2U1.
During this test, A2U1 turns on all display segments. Communication
must function in both directions for this test to pass. If this error is
detected during power-up self-test, the instrument will beep. This error
is only readable from the remote interface.
602 RAM read/write failed This test writes and reads a 55 and AA
checkerboard pattern to each address of RAM. Any incorrect readback
will cause a test failure. This error is only readable from the remote
interface.
603 A / D sync stuck The main CPU issues an A/ D sync pulse to A1U209
and A1U205 to latch the value in the ADC slope counters. A failure is
detected when a sync interrupt is not recognized and a subsequent timeout
occurs.
604 A / D slope convergence failed The input amplifier is configured to
the measure zero (MZ) state in the 10 V range. This test checks whether
the ADC integrator produces nominally the same number of positive and
negative slope decisions (± 10%) during a 20 ms interval.
605 Cannot calibrate rundown gain This test checks the nominal gain
between the integrating ADC and the A1U205 on-chip ADC. This error is
reported if the procedure can not run to completion due to a hardware
failure.
606 Rundown gain out of range This test checks the nominal gain
between the integrating ADC and the A1U205 on-chip ADC. The
nominal gain is check to ± 10% tolerance.
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