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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 390 V2 takes 30 minutes to download

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Simomax Posted - 02/01/2026 : 10:38:42
Hello,

My 390 V2 Rev 3.75 takes approximately 30 minutes to download it's memory on to my PC. It has always been like this since I got it back in 2024 but has never really been an issue. I'm more curious is this is how it is supposed to be/by design or something else. I recall the manual or website stating it should take less than 5 minutes.

I have tried multiple USB cables. Downloading with the unit on and off. This last time is a completely brand new PC, and in all settings it takes around 30 minutes. I timed it a little and it will transfer around 4k in 7 seconds.

I made a video showing the download progress and you can see it take around 30 minutes. The 390 menus when viewed in the PC software are slow too, but again, I am unsure if this is normal or not. And it never fails, just takes a while.

If anyone can shed any light on this I would be grateful.

Video of 390 V2 taking 30 mins to download: https://www.youtube.com/watch?v=6XujYjPWtNo
3   L A T E S T    R E P L I E S    (Newest First)
Simomax Posted - 02/17/2026 : 09:51:16
Thanks for the replies. I guess it just is what it is. It works, so is no biggie.
sinser Posted - 02/15/2026 : 10:17:28
Same here. In Windows 11. I did not try it in wine (linux). But if it works so maybe could be more quick.
EmfDev Posted - 02/10/2026 : 11:54:18
it is due ot the communication protocol is very slow

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