GPS module causes the pulsing tones in mine too.
Unplugging it clears them, but obviously not best solution!
Im going to try decoupling the power local to it when I get the chance, and see if this helps, maybe someone else has tried this?? Perhaps some form of screening, GPS right next to the antenna input…
The fixed “birdies” I thought were mostly due to smps and Hans will enable (in due course) some sort of active frequency switching to keep any out of the band in use.
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Rowan.
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