Hi there,
I'm new to NanoVNA and I hope, I do not ask stupid questions, please excuse me, if this is the case.
I got my NanoVNA H4 last week and played around with it since that time. Today I performed a firmware update using DisLord's version 1.0.69. Everything seemed to work after the update but I noticed very quickly, that after some time (5-10 min) all four traces start freezing or at least the refresh rate drops down to nearly 1 refresh per 1.5 minute.
In that situation, when I switch to the Bandwith menu and go for 333 Hz, the blue line on the top of the screen moves extremely slow from the left to the right. One cycle is approx. the above mentioned 1.5 minutes.
The issue is only with the trace refresh rate, navigating through the menus is smooth and responsive.
The only way to get the NanoVNA back to work, is to perform a "clear config / reset" from the config menu. But in that case, I loose all my calibration and config data.
I didn't see this behaviour with the original fw and my thoughts were, that something could be wrong with the 1.0.69 version. I downgraded to the previous Dislord's fw 1.0.64 but also with that version I experience the same issue.
The occurrence of the issue is random. Sometimes it occurs immediately after I switch the device on and sometimes it happens after 10 minutes of work with it. One time, I also faced the issue during a calibration session. It occurred in that moment, the device was capturing the "Thru" (Ch1 - Ch2) data. On the top of the calibration screen, you could see that the blue line moved extremely slow.
I already searched the Wiki and some older threads for some advices but I couldn't find something adequate.
Is there anyone, who experienced the same issue? Because I coulnd't find something in all the threads around that firmware, I have the feeling, that the issue is up to my device :-(.
I am grateful for any help and tips.
Thanks a lot,
Gerd
Gooser5000