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How do I measure the differential impedance of a cable on the E5080B?

Question asked by tquintilian on Aug 25, 2020
Latest reply on Sep 23, 2020 by Dr_joel

I'm trying to get a value of differential impedance on a cable on the E5080B.  I tried using Smith Charts but the resulting chart is a mess and the TDR analysis of the impedance shows a pretty good representation but it changes with any movement in the cable. I don't know which values to trust or how to get an accurate reading.  Any help is appreciated.