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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 Round hole of EMF-390 near the USB port
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fofukutu

3 Posts

Posted - 03/05/2019 :  21:18:15  Show Profile  Reply with Quote
There is a round hole on the side of EMF-390, right beside the mini USB port. It looks like a stereo jack, anyone knows what is it for?

Thanks!
Reply #1

EmfDev

2132 Posts

Posted - 03/06/2019 :  09:30:35  Show Profile  Reply with Quote
Hi fofukutu, may I ask what is the hardware version of your unit? you can see it in the PCB if you open the battery cover. You don't need to remove the battery. Also can you please provide your firmware version? it's under About->Revision in the menu. Thanks.
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Reply #2

fofukutu

3 Posts

Posted - 03/06/2019 :  18:38:44  Show Profile  Reply with Quote
Thanks for the reply. The hardware version shown on the PCB is 20190111, and the firmware version is 2.22.
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Reply #3

EmfDev

2132 Posts

Posted - 03/07/2019 :  10:15:32  Show Profile  Reply with Quote
It's for earphones.
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Reply #4

fofukutu

3 Posts

Posted - 03/08/2019 :  00:03:15  Show Profile  Reply with Quote
Got it, thanks! It is probably helpful to add this info to the user guide.
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Reply #5

EmfDev

2132 Posts

Posted - 03/08/2019 :  09:23:45  Show Profile  Reply with Quote
Yes we are working on it.
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