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Network Analyzer fails verification for 50 ohm air line

Question asked by Neo1130 on Jul 22, 2010
Latest reply on Jul 24, 2010 by Dr_joel
We have an Agilent N5230A at work, which during phase matching of cables, we were getting some questionable readings.  I was instructed to do a verification test by the boss and all the tests passed great except for one.  The 50 ohm air line test for S11 Magnitude failed @ 40GHz.  I performed a calibration and test 3 different times and each time got the same results.  What can we do about this? 

Appreciate any help that can be given.  

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