5Service
120 Keysight E3633A and E3634A Service Guide
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 integrating ADC and the U19 on-chip
ADC. This error is reported if the procedure cannot 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 U19
on-chip ADC. The nominal gain is checked to ±10% tolerance.
607
Rundown too noisy
This test checks the gain repeatability between the integrating ADC and the U19
on-chip ADC. The gain test (606) is performed eight times. Gain noise must be
less that ±64 lsb’s of the U19 on-chip ADC.
608
Serial configuration readback failed
This test re-sends the last 3 byte serial configuration data to all the serial path
(SERDAT, SERBCK, SERCLK). The data is then clocked back into U20 and
compared against the original 3 bytes sent. A failure occurs if the data do not
match. This tests checks the serial data path through U23.
609
System ADC test failed
This test checks if the ADC hardware is functional. The main controller U101
establishes communication with the ADC and checks if there are any error bits
set for the ADC's status reporting.
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