Yes, you are right, the probe doesn't know the frequency. Thus, the 
manufacturer has to make it flat, by design and construction, or you have to 
generate your own correction factors based on performance testing of the probe.

Ed Price
Chula Vista, CA USA

From: Ken Javor []
Sent: Monday, March 05, 2018 8:19 PM
Subject: Re: [PSES] Field probe calibration

It is clear that any correction table built into the field probe 
hardware/firmware/software is time domain only, so linearity correction factors 
based on amplitude, not frequency domain, because there is no frequency 
information unless you are looking at an entirely different kind of device 
designed to drive a spectrum analyzer.  With that sort of system (suppliers of 
which I am aware include Rohde & Schwarz and Narda), it is possible to correct 
in in the frequency domain, but again not a single standard out there is based 
on the use of such, as they are quite recent developments.

Ken Javor
Phone: (256) 650-5261

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