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ENA differential port setting issue

Question asked by NCCU1990 on Mar 16, 2011
We have one question about the balance port impedance settting issue.

Their DUT input impedance is 10 -j20 Ohm.
What differential mode and common mode impedance value need to set in ENA?

Is the user need to set the differential mode impedance to conjugate value ( 10 + j20 ) in ENA?

If the user only set the differential mode impedance value and doesn't set the common mode impedance value, has any significant effect  for the mixed mode parameter measurement?

Thank you.