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E5080A Calibration becomes invalidate once change to narrower range

Question asked by Ott007 on Dec 5, 2018
Latest reply on Dec 6, 2018 by daras

Wide range E5080A ENA Calibration is done and saved as state file+Calibration. Once frequency range is changed to a narrower range which inside the original calibration range, the calibration validate icon "C" becomes to "C*". Did anything miss during setup? How to avoid it? 

Any comments? Thanks,