HP/AGILENT 8561E Amplitude units configuration

Hello

I am using HP/AGILENT 8561E Spectrum Analayzer for Antenna measurements and need to use dBuV  amplitude units during this test .

I am using downloaded drivers from NI and all work fine. Last thing that I need is to config my Spectrum Analayzer for dBuV units but I don't find appropriate vi  drivers that do this, there is default dBm units only. Of course is possibility  to add relationship between dBuV and dBm and calculate this but I want to config my Spectrum analayzer. Could you please assist me?

Thanks in Advance