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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 high rf reading with Backlight		  New Topic  Reply to Topic
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TrueEMF

USA
1 Posts
Posted - 05/24/2026 :  07:36:49  Show Profile  Reply with Quote
hi all!

i have the gqemf 390 v2

i am getting high rf pulse readings with the Backlight enabled

i use uw/m2 . my baseline readings are 0.4-0.5 (no backlight)


as soon as i turn on the backlight i get pulses up too 30 but consistently 5,15, 25 of constant fluctuating pulsing

i have factory reset multiple times and i am on the newest firmware, i just bought the unit this month.


also my second issue is {vertical mode}, the "rf mode specifically" is super laggy once enabled. the device freezes and updates every 5-6 seconds and has a hard time switching modes after. other than that it has been a fun experience!


my rf gain is set to 10 (default)
will accept any tips or advice thank you!
Reply #1

EmfDev

2422 Posts
Posted - 05/26/2026 :  15:58:22  Show Profile  Reply with Quote
the backlight is using pwm so it may generate some noise.
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Reply #2

Munster34

4 Posts
Posted - 08/23/2026 :  17:56:21  Show Profile  Reply with Quote
Great troubleshooting notes! Your baseline 0.4-0.5 µW/m² is solid. However, those backlight-triggered spikes (5-30 µW/m²) suggest potential EMI interference rather than actual RF exposure. Try disabling backlight during measurements for cleaner data. Regarding the vertical mode lag—this might correlate to slope 2 calibration drift under display load. Contact support; firmware updates often address performance bottlenecks. Have you tested with external power supply instead of batteries? https://slope2game.com/
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