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Noise floor of 8591A

Question asked by greendog_de on Mar 7, 2010
Latest reply on Mar 8, 2010 by MikeM

in the attachment you can see the noise floor of my 8591A. My question: is it normal, that the noise floor increases at higher frequencies?

I know from other analyzers (Advantest), that the noise floor is constant over the whole frequency range.

Is there a new calibration necessary or how can i get constant noise floor?

Thank you!

Kind regards,