I made a c# program using scpi protocol that controls signal generators, noise figure analyzers and spectrum. My program worked *well* with other types of spectrums but not with the E4440A.
The spectrum gets into remote mode, but not respond to any scpi command. I tried to commuincte with the spectrum using keysight command expert and got this message;
COMException:AgilentSAn: IVI Instrument Class not supported by instrument. AgilentSAnSA:Personality is not installed.
How can i fix that?