Keysight Technologies N5990A User Manual page 64

3 Calibrations and Test Procedures
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files are saved by default to the N5990A calibrations folder. If these
calibrations are run again, the data file will be overwritten. In order to save
the calibration data files at each configuration, you must copy the files
from the directory: C:\ProgramData\BitifEye\N5990A\Calibrations\MPHY
and save them manually in any folder before re-running the calibrations.
Keysight N5990A MIPI M-PHY Receiver Test User Guide