Do not think for a second that this 20$ device is in any shape or form an accurate evaluation of the electric field.Slender wrote: ↑16 Sep 2024, 20:15
This is a pure interference problem. According to your lan-cable, there is no less interference than from your socket. If you have grounding, this may indicate that it is of poor quality. Sorry for the photo quality, but you can see the upper value of 300v/m. For reference, from my socket to the PC comes about 500v/m. I also feel that wi-fi feels faster. I do not die behind walls and something like that. The mouse also feels freer. These facts make me think that this is not an internet problem after all.
You need a proper oscilloscope, good probes and a spectrum analyzer to have a remote clue on what's actually happening in real-time and for comparative purposes.
500V/m... quite a concerning value to say the least. I think you should call up a proper team of electricians to evaluate your situation, if this is a picture of your home.
Not for gaming reasons, but this can be a health hazard.