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Determining calibration requirements??

Question asked by GreenEngineer on Nov 11, 2008
Latest reply on Nov 12, 2008 by GreenEngineer
I have an 8753E-006 VNA and a 85032B Calibration Kit which is used in a cable assembly house.

I received a requirement to test an N-Type Male to Male 24" long cable to a VSWR of 1.5:1.  The exact wording of the requirement is "VSWR to be less than 1.5:1 at both ends of the cable, measured at  1GHz".  How do I determine the calibration requirements for performing this test? Should I use adapter removal?  Or should I use swap-equal-adapters(I found a set of Maury adapters M-M, F-F, and M-F - all with the same electrical length)?  What other options do I have?  Is this all overkill with such a loose requirement?

I have read your Network Analyzer Basics document and AN1287-1, -2, and -3, but they just tell which errors are removed during each calibration.  Any other suggested reading?

A side question:  I would think that the swap-equal-adapters method would be the same or better than adapter-removal calibration - what makes adapter-removal more accurate?

Thank you very much