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For questions about electromagnetic interference (EMI); see also the [emc] tag.
1
vote
Accepted
How to conclude the nature of interference for such scenarios?
In some cases, \$V_{cm}\$ is an AC voltage produced by current in a ground loop (in orange, below).
It cannot be shorted out.
If this ground loop can be broken, no current can flow around the loop, s …
39
votes
Accepted
Is it possible to jam wireless home alarm systems?
A "denial-of-service" wireless attack is very easy. It will disrupt radio communication between sensor and panel. Hopefully, the panel is smart enough to detect that one (or more) of its sensors has f …
1
vote
Could multiple transmitters on the same frequency work if phase-locked to GPS? (gedanken)
Receivers in a trough might be getting destructive interference from each antenna, while a receiving site at a peak might be getting constructive interference from each antenna. …