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VNA Cable Length measurement

Question asked by Ben003 Employee on Aug 26, 2020
Latest reply on Sep 9, 2020 by Dr_joel

Hi, I have 3 reference coax cables, and I'm trying to find an accurate way of measuring their electrical length. I understand a VNA is the best way to do this.


VP is 0.66 and the 3 lengths are 40m, 85m, 350m. I only have access to one end of the cable (other end is open)


The reason for wanting to know the exact electrical length of these cables is so that I can use them to verify the accuracy of a TDR under test. 


I have an Agilent 8510C available to use for this test. 


Would somebody be able to advise me on how to do this.