2 Performance Tests
56 Keysight N8262A Service Guide
Linearity (Peak Path)
Description
Linearity over the full input voltage range of the measurement path is warranted
to provide assurance of instrument accuracy. This test measures linearity by using
a calibration DAC and a calibration ADC (built into the DUT) to stimulate and
compare performance of the Average Path against the measurement ADC,
returning the worst case percentage error.
Equipment
– No test equipment required
Test method
1 Execute the internal linearity 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 than 0.8 and greater than –0.8. The
optimum measurement result for this test is 0.
– This test can be performed manually via the commands:
SERV:BIST:PEAK[1|2]:LIN0
SERV:BIST:PEAK[1|2]:LIN:PERR?
(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").
– For external traceability of the peak path linearity verification please refer to
the Keysight N7832A Test Management Environment (TME) Software in
http://cal.software.keysight.com/ for further information.
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