DiSlord,
Well, I said problem solved, but I flashed Firmware 0.8.4.4 (Built 27/04/2020 -21:32:13) again,? calibrated NanoVNA standalone 10kHz to 2.7 GHz and calibrated NanoVNA-Saver 290MHz to 320 MHz.
After this I measured my 49.85 OHms standard the result was brilliant..... I also measured S21 Gain (S21 through), I expected to see 0 dB , but please look at my pictures. that I attached here.
This time I calibrated with CH1 not loaded while S11 calibration
Jos
Op 28-4-2020 om 15:01 schreef Jos Stevens:
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DiSlord,
I reinstalled NanoVNA-Saver, left the firmware as it was (previous working) and calibrated in NanoVNA-Saver, same problem.
After this I realized that while calibrating 2 port I had CH1 loaded with 50 Ohms all the time except when calibrating "through", so I repeated the whole calibration without the 50 Ohms load on CH1 for short, open and load, connected it just for Isolation. This solved the problem !!! .... I think I had done the termination of Ch1 while doing 2 port calibration before without problems, but I might be wrong, very sorry abt that !
Now I don't know what to load best of your latest 4 versions, please be so kind to tell me.
Sorry again for waisting your time !
Jos
Op 28-4-2020 om 11:30 schreef Jos Stevens:
DiSlord,
Don't understand either, I always do reset before calibration. Will flash the previous working firmware again today to check if it still works.
Jos
Op 27-4-2020 om 23:44 schreef DiSlord:
i don`t understand
1 variant is last firmware
2 variant - is 0.8.4.3 (Only 8kHz IF change)
3 variant - is old 0.8.4.4 (2x external freq)
You not fogot reset self NanoVNA calibration before calibrate in NanoVNA Saver?
Try restore last worked firmware
