NanoVNA-App has become my standard way to use the NanoVNA. It does nearly everything, and nicely so. But while doing some work yesterday I missed one feature: The ability to display the S11 impedance as modulus and phase angle. The program can display the modulus only, or at least I haven't found how to make it display the phase angle of an impedance too.
Of course the same information can be obtained from the series R+jX graph, but in some situations it's very useful to see the complete information as modulus and angle, that is, the |impedance S11| curve together with the phase curve.
For those who will jump and tell me that the program does have an S11 phase curve graph: Yes, it does, but that's not the same as the phase curve of the impedance!
To show the modulus and the phase of the impedance in the same graph, two vertical scales would be required, because the modulus is in Ohm and needs an adjustable scale, while the phase is in degrees, going from -90 to +90. I don't know if this is easy to implement in NanoVNA-App. If not, it would be OK to just have a separate graph for impedance phase, which can be displayed together with the impedance modulus graph on a tiled screen.
I know that since NanoVNA-App is open source, I should just grab the source code, download the development system, and implement this myself. But alas, I'm an old fashioned (and just plain old!) BASIC man, rather than a C++ guru, so if I put my fingers into that source code the outcome will most likely be a disaster. So I appeal to those who speak C++, and particularly to those who are already familiar with the NanoVNA-App source!
Manfred
Roger Need