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Is this a bug of the source power calibration?

Question asked by stone.wu on Sep 15, 2011
Latest reply on Sep 17, 2011 by Dr_joel
The VNA is N5244A,  firmware is A.09.42.05,A.02.00.07.

When doing the soure power calibration, in the option window, we could select the multi power level calibration. But when I select it , It always failed. And if it is unselected ,it passed. Do you know why this happen?

Thank you.