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Phase distortion of DSO

Question asked by andy-schwarz on Sep 3, 2009
Latest reply on Apr 21, 2010 by andy-schwarz
how can the (linear) phase distortion over frequency (e.g. arg(H(jomega)) ) of a DSO be verified/checked?
We would like to characterize linear amplitude and phase distortion of a wide-band signal (BW 200 MHz) and therefore we want to compensate the distortion due to the DSO itself.
Accuracy should be in the range of <0.2 dB/ and < 1 degree.
Thanks in advance!