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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 EMF390 dud

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fendiag Posted - 07/03/2020 : 03:43:55
Hello, anyone know why this device wipes all preferences when the power is cycled? When I turn it back on, backlight is back at 10 and some other settings have been lost.

8   L A T E S T    R E P L I E S    (Newest First)
EmfDev Posted - 07/08/2020 : 09:50:46
No worries! I'm sorry you received a possibly defective unit.
fendiag Posted - 07/08/2020 : 05:00:10
Hi, just wanted to thank Mark for sending the firmware update, unfortunately i had sent the unit back for replacement before i had a chance to install it.

Thanks again, Chris
EmfDev Posted - 07/06/2020 : 09:29:12
Hi fendiag, can you please email me your serial number? Thanks.
rfrazier Posted - 07/05/2020 : 20:22:58
They're pretty good about responding to forum posts. But you can also contact them directly at if you like. Ron
fendiag Posted - 07/04/2020 : 11:49:18
That would be really helpfull, still waiting for the firmware request to be answered? guess they're all busy.
mjh Posted - 07/03/2020 : 07:45:45
EmfDev will probably tell you what you need to do. It may be something wrong with the meter.
fendiag Posted - 07/03/2020 : 07:41:14
I tried a few times, only saves the date. Hold power button for 3 seconds both off and on?
mjh Posted - 07/03/2020 : 06:47:13
My EMF390 v2 keeps the setting. I changed my backlight and it keeps the settings when i power cycle. Not sure why yours does that.

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