Keysight N1914A - Linearity (Average Path); Description; Equipment; Test Method

Performance Tests 2
Keysight N1913/1914A Service Guide 61
Linearity (Average 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 If the DUT model number is N1914A, then repeat this procedure for channel B.
4 The test will take a few minutes to complete.
5 The measurement result should be less than 0.5 and greater than –0.5. The
optimum measurement result for this test is 0.
NOTE
This test can be performed manually via the commands:
SERV:BIST:CW[1|2]:LIN
SERV:BIST:CW[1|2]:LIN:PERR?
(Refer to the N1913/1914A EPM Series Power Meters Programming Guide for
further details on the use of these commands)