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Strange results when measuring S11 and S21 of an Airline

Question asked by theamberco on Aug 12, 2014
Latest reply on Aug 22, 2014 by Dr_joel
Hi, I have a PNA E8357A and I am using a 85032A cal. kit and a 85055A ver. kit. I did a one port cal and measured the S11 of an airline terminated in a short, I got what is in pictures 2 and 3 then I did a two port cal. and masured S21 I got what is in picture 1. Anyone can tell me what this means and what is wrong with that.

Edited by: theamberco on Aug 22, 2014 5:22 PM