开云体育

Hi
Yesterday I uploaded 1.0.45 firmware from DisLord to my H4. Everything went fine and stand alone there are no problems. I then connected to NanoVNA Saver 3.8. I calibrated using that program as I have done before but the SWR trace of my antenna was nothing like I knew it should be. It appeared to be resonant everywhere which of course was rubbish. After finding, with help, the NanoVNA App this morning I tried calibrating with that- exactly the same. I calibrated the NanoVNA and then switched to using that calibration with the program rather than the App calibration and it was good. So my question is what I have I done wrong and why doesn't it calibrate correctly with either of those Windows programs?

Thanks for any help.
John

Did you use the Calibration Wizard or did you just use the SOLT buttons? Did you get any errors when you did the calibration?

I couldn't get the SOLT butons to work on NanoVNA Saver v3.8. I also found that when using the Calibration Wizard, I had to put a 50 ohm termination on Port 1. If I tried calibrating without the extra termination, the calibration would fail.

Bert, VK3TU

Hi Bert
In NanoVNA Saver I used the calibration wizard which is what I've always done before the firmware update. It went through fine, showing no errors, just calibrating Port 0. I didn't do anything with Port 1 because I didn't think of it. With the NanoVNA App, which I only started trying this morning, I couldn't find any wizard so I just clicked the buttons. Again I only calibrated Port 0. The odd thing I noticed with that program is that after doing the measurements I could save the calibration and all the measurements had a tick showing that they had been done but I couldn't find a kind of 'finish' button. That program allows me to switch between using the calibration file on the VNA or the one produced by the program. Switching between the two shows that the VNA one gives good results but the one in the program doesn't.
I could go back to the original firmware but I really like the stand alone functions of the new version.

73,
John

John,
Did you clear the memory immediately after flashing?
Use the command console using putty or teraterm and run the 'clearconfig 1234' command then recal your touch and RF on the device


On Sun., 7 Mar. 2021 at 9:16 a.m., John Tyler<john@...> wrote: Hi
Yesterday I uploaded 1.0.45 firmware from DisLord to my H4. Everything went fine and stand alone there are no problems. I then connected to NanoVNA Saver 3.8. I calibrated using that program as I have done before but the SWR trace of my antenna was nothing like I knew it should be. It appeared to be resonant everywhere which of course was rubbish. After finding, with help, the NanoVNA App this morning I tried calibrating with that- exactly the same. I calibrated the NanoVNA and then switched to using that calibration with the program rather than the App calibration and it was good. So my question is what I have I done wrong and why doesn't it calibrate correctly with either of those Windows programs?

Thanks for any help.
John

Hi Larry

Yes! That was the answer. It now calibrates with both programs and the results are the same both with the Windows programs and compared to the NanoVNA itself when used on its own.
I watched a YouTube video about the update and followed it meticulously but there was nothing else mentioned after calibrating the screen.
It's actually very nice that the NanoVNA App allows communication without having to bother starting something like Putty.

Thanks once again.

73,
John