During measurement, the spectrum value on the EPS software screen differs from the value displayed on the spectrum analyzer by as much as approximately 40dBμV at some frequencies. Why?

During measurement, the spectrum value on the EPS software screen differs from the value displayed on the spectrum analyzer by as much as approximately 40dBμV at some frequencies. Why?

Is a MODEL for one of the antennas selected under Antenna Factor in the EPS software?
If so, the value displayed on the software screen is corrected using the antenna factor.

Clear the “Enabled” checkbox for Antenna Factor or select “THROUGH”, and
the spectrum value on the EPS software screen may then match the value displayed on the spectrum analyzer.