Simply great as always, I can't thank you enough! I may have an idea for when you feel you have been all the way around. :-) What about you then start on telling how to connect and make the différance measurements correctly, what traps there is and how to avoid them?
I don’t know what the ‘Tip tab’ is, but the app note you’re referring to might be this one: xdevs.com/doc/HP_Agilent_Keysight/HP%20AN%20372-1%20Application%20Note.pdf