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Proper way to measure impedance using a PNA

Question asked by chuckinnc on Jan 9, 2007
Latest reply on Jan 9, 2007 by Dr_joel
I need to measure 50 ohm transmission line for impedance in a production enviroment.  My usual method is to set the frequency 50 - 2500mhz (our standard production specs) then do S11, calibrate, set a marker @ 160 mhz & switch to smith chart.
Im not sure if this is a proper way to measure impedance, it was the way
previous technicians used.  The 160 mhz marker also has been a question
no one can seem to answer.  Our transmission lines specifications are
50 - 2500 mhz,  should the marker be at a different frequency than 160?

The PNAs we have are 8720, 8753 & 8714.