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Ridiculous Amounts of Interference From Neighbors LED Lights.
- Thread starter Raccoon
- Start date
Who's talking about the FCC (and enforcement)?
This is an effort to find the source of the noise (know what you're dealing with). That should always be the first step when receiving interference. Using the shotgun method to combat a problem doesn't teach us anything, and can get very expensive if you miss. The lesson that comes from solving a problem with logical thinking, is always more valuable than solving one with luck.
If you had a carlson superprobe (or maybe even a handheld receiver) with a shielded H-field probe on it, you could go down their breaker panel and quickly pinpoint the circuits making noise. Same probe works on the cords at the outlets too. The nice thing about using an H-field probe is that there has to be current flow and you need to have the probe close and oriented right. A 1" shielded H-field probe will not pick it up through the air at any significant distance.
Voltages can exist on any conductive surface, whereas currents only flow in complete circuits. If you find the offending noise with an H-field probe, there's no more guessing, you are on the circuit causing that noise. I used to try to do this with E-field probes, didn't work so well.
Once you find the offending devices, you got two choices (if a case of beer doesn't do it). Buy them something less noisy for that application, or, put that H-Field probe on a tiny SA and see what frequency ferrites you need to order and clamp them on as close to the noise source as you can. Good chance there are multiple offenders at different frequencies.
Voltages can exist on any conductive surface, whereas currents only flow in complete circuits. If you find the offending noise with an H-field probe, there's no more guessing, you are on the circuit causing that noise. I used to try to do this with E-field probes, didn't work so well.
Once you find the offending devices, you got two choices (if a case of beer doesn't do it). Buy them something less noisy for that application, or, put that H-Field probe on a tiny SA and see what frequency ferrites you need to order and clamp them on as close to the noise source as you can. Good chance there are multiple offenders at different frequencies.