Holger M¨¹ller wrote:
I've figured out, that the USB driver of S-A-A-2 delivers an incompatible hwid for pySerial on Windows. If fixed it in my branch.
.....The CH2 through calibration never normalizes (zero out) after applying an SOLT calibration, however; the CH1 SOL calibration is fine. Have you encountered this issue on your Linux set-up when using the S-A-A-2? ....
I'll try it out soon, but I think I've seen that someone complains the same issue with NanoVNA-QT.. can you confirm this?
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Holger,
I have most of the NanoVNA variants and was able do some beta testing of your nanovna-v2 branch using each:
1. Your fix for the blank VID/PID returned by the V2 using pyserial on the Windows OS worked on my Windows 10 x64 set-up. The NanoVNA-Saver V2 branch now
auto-detects the V2, -H, -H4, and -F under Windows 10.
2. I ran a SOLT calibration on the V2, H4 and -F using the NanoVNA-Saver V2 branch and the through calibration was off for the V2 and -F, but was zero for the -H4 (see attachments). I haven't checked Rune's release version to see if the same difference occurs between the -F and -H4.
3. I ran a SOLT calibration on the V2 using NanoVNA-QT and the through calibration was spot on (see attachments).
4. I tried your screenshot module for the -H4 and was surprised to find that, other than the color mapping being off on my captured image, it worked fine. I had been stumped by NanoVNA-F returning 4 small images instead of one and asked the NanoVNA-F designer about it. He said that it was a hardware problem that has been corrected in the current version but would require a hardware fix on versions prior to 2.3. I let him know that you had figured out a software solution for unpacking the four images that would probably make its way into Rune's next release.
5. The screenshot module for the -H4 does not work in the NanoVNA-Saver V2 branch. Gyula Molnar previously commented that screenwidth and screenheight constants are incorrect for the -H4. I think the " getScreenshot" function may also need to be overrode in the H4 class as you did for the -F.
Thanks for allowing us the opportunity to beta test the NanoVNA-Saver V2 branch. BTW I noticed that above 1 GHz, the thru calibration for Erik's TAPR application for the V2 also deviates from zero.
- Herb
