Keysight Technologies U9361C Measurement Manual page 46

Demonstrations
8. Under the same Extensions window, scroll down and enable RCal Corrections.
RCal Correction > Correction
9. Perform an Auto-range by selecting the button shown below.
10.Exit the input window. EVM should now be improved. For this example, EVM went from 1.02%
to 0.188%.
46 U9361C/F/G/M RCal Receiver Calibrator Measurement Guide