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PNA N5230A Amplitude jump

Question asked by BAVDJIISKI on Jul 8, 2009
Latest reply on Jul 23, 2009 by BAVDJIISKI
Hi, recently I have a problem with a N5230A PNA - the amplitude "jumps" with 3.8dB without any obvious reason. This happens on a casual basis, but the change is always the the same, 3.8dB, and then back to the initial value. This jump is clearly  seen on the display and it affects both corrected and raw data. At the moment I have a short cable connected between both ports and I'm reading +2dB IL. Can someone what's the problem with the PNA?  

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