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Averaging in segmented sweep - misleading sweep time

Question asked by spacem0n on Dec 19, 2008
Latest reply on Feb 12, 2009 by spacem0n
I am using an E4402 in segmented sweep (8 segments) to measure 8 CW signals. The sweep time returned by the ESA is 32 milliseconds. I have chosen RMS averaging over 100 sweeps, which by my estimate would be 3.2 seconds. However, when I change the level of the input CW signals it takes 100 seconds for the averaged value of the measurements to stabilise.

Can anyone explain why?