Performance Tests 2
Keysight N8262A Service Guide 49
Zero Set (Average Path)
Description
Zero set is defined as the amount of residual offset error that is present following a
zero operation. This offset error is caused by contamination from several sources,
including circuit noise. This test measures the effectiveness of zero set by
performing 15 back-to-back zero operations of the average path (with no sensor
attached), after which the standard deviation of the results is calculated and
returned as the measured value.
Equipment
– No test equipment required
Test Method
1 Execute the internal zero set measurement procedure for Channel A.
2 Read back the result of the measurement from the DUT.
3 Repeat this procedure for Channel B.
4 The test will take a few minutes to complete.
5 The measurement result should be less than0.0000175. The smaller the
measurement result, the smaller the amount of residual offset error.
– This test can be performed manually via the commands:
SERV:BIST:PEAK[1|2]:ZSET
SERV:BIST:CW[1|2]:ZSET:NUM?
(Refer to the Programming Guide for further details on the use of these
commands)
– No adjustment is available for this test if it fails (see Chapter 5,
"Troubleshooting Guide").
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