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作ってみた https://github.com/ttrftech/NanoVNA/commit/fb643ece9c7983d4f5c6ad7bf17c0900ed25235d けど、測定結果に違いは見えない(S21のノイズフロアが下がらない)。 https://github.com/ttrftech/NanoVNA/tree/bandwidth   帯域幅を狭くすると、スイープにそれなりに時間がかかる。10Hzで100倍=100ms/pt

@andyg24 thanks for the suggestion. I tested the fix you pointed out. Unfortunately, occasional freeze still happens after the fix.

Thanks for the proposal. I think that using strings of expressing features is better than a number of 16bit integers. I'd like to add a new command for that.

Interesting! Please show me as PR.

The limitation is coming from architecture mainly. And also limited by coupling capacitor of mixer input by hardware. The lower bound is limited by IF frequency. It needs twice or...

- Did you install D2? It is needed to show the battery indicator. - Try to cycle power after `clearconfig`, do not do `saveconfig`.

added guide text after doing clearconfig at https://github.com/ttrftech/NanoVNA/commit/e6035a5d96d0fea00d4cd7d5479a8ce865ebd38b

@vallettea Thanks for the comment and sorry for responding too late! In practice, the value of impedance you measure might have errors because of too large noise and incompleteness of...

Thanks for your trial and report. Can I see the evidence or captures, or quantities of the improvement?

Thanks for your comment, your point out must be true. But `snprintf` needs to link `stdio` and heap, and current firmware doesn't have heap and the shortage of flash or...