Vadim Demidov

icon location Saint Petersburg, Russia icon location Educated as an RF engineer, but mostly involved in ASIC/FPGA design or embedded programming

Results 2 comments of Vadim Demidov

Crystal measurement function

[XQ_S11_Lm_calc_05.zip](https://github.com/NanoVNA-Saver/nanovna-saver/files/6287822/XQ_S11_Lm_calc_05.zip) You can try also circle fitting into G/B plot, the attachment is Scilab script with .S2P file example: ![tst_05](https://user-images.githubusercontent.com/21156005/114226136-dfd16000-997b-11eb-80b6-d15915295ea8.png)

Crystal parameters calculation/display

Yes, I agree completely, you can start with 3dB bandwidth or with +/- 45 degree phase points. The problem is in getting these points at reasonable accuracy. Here the circle...