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Interference question from newbie

I think you have misunderstood the physics of harmonics. Time to break out a textbook or head over to Wikipedia.
I'd be much more inclined to poke out my eye with a sharp stick. ;-)
 
Seth, I think u may be mixing up magnetic interference and radio interference. The warning yr getting is telling you the compass is being offset by a nearby metal object which could be the pipes. This would lead to a compass error and moving away a 20 or 30 ft would probably solve the proble.
I’m somewhat aware of differences between the magnetic and electromagnetic spectrums. (Spectra?) Radio. Magnetism. They are different. But they can interact.

Unfortunately DJI’s diagnostic messages are pretty general; when they report interference it’s hard to know if it’s radio frequency interference or magnetic. And often people don’t take time to read such messages critically.