Zero Set Performance Verification - Keysight Technologies U8480 Series Service Manual

Zero Set Performance Verification

This performance verification is carried out to verify that a minimal amount of
residual offset error is present after zeroing has been performed. The offset error is
caused by contamination from several sources including the noise of the
device-under-test (DUT) itself. Zero set is the difference between the power levels
indicated by the DUT, after executing zeroing and the true zero power. Ideally, this
difference should be zero.
This performance verification requires a computer with the Keysight IO Libraries
Suite installed.
Procedure
1 Connect the DUT (U8480 Series) to the computer as shown in the following
2 Warm up the DUT for approximately 1 hour to allow the temperature to
3 Launch the Interactive IO on the Keysight IO Libraries Suite to send SCPI
4 Terminate the DUT with a load.
5 Perform zeroing for the DUT by sending "CAL:ZERO:AUTO ONCE".
6 Perform internal calibration for the DUT by sending "CAL:TYPE INT" and
7 Set the frequency of the DUT to 50 MHz by sending "FREQ 50MHz".
8 Enable auto-averaging for the DUT by sending "AVER:COUN:AUTO ON".
[1] Optional for all models except the U8488A.
Keysight U8480 Series Service Guide
diagram. Then, launch the Keysight IO Libraries Suite on the computer.
DUT
settle.
commands to the DUT.
"CAL:AUTO ONCE".
Performance Verification and Adjustments
[1]
2
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