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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 No se reconoce el dispositivo USB		  New Topic  Reply to Topic
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sinser

2 Posts
Posted - 07/06/2025 :  08:46:40  Show Profile  Reply with Quote
Hello. I am writting from Huelva, Spain. My english is what you can read, sorry for that. I have a little trouble here



Sorry but i don't have exactly the error/notification message in english so i think it is better that i write it like it is showed.

I research it in the system, a little. The Device Manager (Administrador de dispositivos, in the capture) not show Ports now when i connect the GMC-390v2.



But in "controladoras de bus serie universal" appears the error



"Dispositivo USB desconocido (Error de solucitud de descriptor de dispositivo)" PLOP!

The drivers was installed:



The EF radiation detected is 150-160 V/m the whole time with AC and 77-78 V/m with battery.

If somebody knows how to fix a thing like that, any help in this line will be welcome.

Thanks in advance.
perp4b-n-11k
Reply #1

EmfDev

2352 Posts
Posted - 07/07/2025 :  13:20:54  Show Profile  Reply with Quote
which version of windows are you using?
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Reply #2

sinser

2 Posts
Posted - 08/16/2025 :  08:31:08  Show Profile  Reply with Quote
Windows 11 Home before. Now i get Windows 11 Pro. I have the same error. I reinstall everything. The devide works perfectly in asus laptop. But in a desktop computer Lenovo it is no so.

There are som images of devide properties





It say "Device descriptor failure".
perp4b-n-11k
Edited by - sinser on 08/16/2025 08:46:49
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Reply #3

EmfDev

2352 Posts
Posted - 08/19/2025 :  14:49:15  Show Profile  Reply with Quote
usually win11 already has the driver preinstalled.

can you go to Device Manager -> Add legacy hardware and try to install anything under ports to Ports section can appear on your device manager list.
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Reply #4

EmfDev

2352 Posts
Posted - 08/19/2025 :  14:49:16  Show Profile  Reply with Quote
usually win11 already has the driver preinstalled.

can you go to Device Manager -> Add legacy hardware and try to install anything under ports to Ports section can appear on your device manager list.
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