"You might be having a problem with RF currents on the coaxial cable shield and therefore the VNA. You could try putting a ferrite beads on the cable but you would need to remove and reattach one connector. Just as good would be to loop the cable through a ferrite toroidal core a few times. The type of ferrite should be appropriate for the frequency range of concern."
Thank you for this. I will have a think about this. At this stage I am only plugging in the antenna and looking for the dips that show the resonant points. I am not pumping any signal in, but I guess it is possible there might be currents induced from other sourcessuch as CFL lights or chargers.
"AA has larger text, but is limited to displaying two traces at a time"
Thank you for the explanation. That might actually be helpful on this small screen although if I can get PC software working and learn to work things from there, then it might not be needed. I will experiment some more
and see.
BTW, I have now logged the "bdist_wheel" issue on the nanovna-saver Github.
