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Agilent 8562E/EC Amplitude Level issue

Question asked by adnan on Jan 22, 2014
Latest reply on Jan 24, 2014 by MikeM
hi,

I am using Agilent 8562E/EC spectrum analyzer for RF power amplifier measurement (5 watts). I always use a 20db attenuator and a diy dc blocker to protect the analyzer. I  noticed last day, that the analyzer is displaying a 2.18db amplitude error at 300MHz and 3-3.5 db amplitude error  at higher frequencies. What is the reason for this type of error? Can i fixed it.? Does it shows that there is something wrong with the input port?  

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