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Source power cal with 1-port ecal

Question asked by totalaj on Mar 19, 2007
Latest reply on Mar 19, 2007 by am95405
Using the N5230A PNA I set up parameters for the S11 measurement (SWR format) I need to make and perform a 1-Port full ECal.  I save the .csa as "something_S11".  We then add in source power correction table and save the .csa as "something_S11_SPC".  Hook up UUT and perform measurement using "something_S11.csa".  .  I measure points at the start, middle and end of my range.  The values returned are 1.40, 1.40 and 1.28.  I then switch to "something_S11_SPC.csa" and get results of 1.48, 1.36 and 1.35 respectively.  Cals and measurements are repeatable.

The source power cal data is measured with calibrated E-Series Power meter and loaded into PNA.  Data loaded is formatted to 0.01 dB. Power meter corrections made immediately before 1-port ecal at the same connection.

Does adding in SPC to my 1-port cal gain me anything for VSWR measurement?  Is it good or bad practice?

Thank you