Keysight M9383B Measurement Manual page 42

Basic Measurements
Making Measurements
10.Select Measure Corrections.
11.Select Finish. The output csv file is set to Block A.
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During the measurement, the VXG outputs a CW between the Start and
Stop Frequencies for the specified number of steps and output power. The
measurement results are saved to a csv file using an automatically
generated file name.
M9383B/84B Measurement Guide