On Sat, Feb 29, 2020 at 11:41 PM, alan victor wrote:
" on the displayed result example. The Co value shown of .56 pF. Seems awfully small. Does he remove the package C somehow in the measurement and calculation or is this just the Co of the xtal blank? That particular package has to have a larger Co than 500 fF. Typically that value is picked off by moving well offset from the series resonate frequency of the xtal. "
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Alan,
I'm not sure if Battosai42 is a member of this forum and questions might be best directed to him at his GitHub page. His application is written in Python and examination of the code might answer your question. The project description at does mention that either the Phase-Shift Method or -3dB Bandwidth Method can be used.
Rune's NanoVNA-saver application started life in a similar manner and today is a mainstay in the NanoVNA community. I wish Battosai42 similar success with his application.
- Herb
