On Sun, Nov 10, 2019 at 06:37 PM, Roland wrote:
Tuning is at 438.800 MHz and on the screendump of the software, there is a
huge spike that I didn't see on the NanoVNA display.
You're using Linear scale on NanoVNA display and Logmag scale on PC software. This is why there is difference.
By the way, there is more functional software NanoVNA software for PC:
it allows to capture screenshots and show more trace types.