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It may be possible to passively detect what channel you are tuned to. I’ve read anecdotes of billboards scanning cars as they pass to determine what FM station
by hamandcheese 8y ago
It may be possible to passively detect what channel you are tuned to. I’ve read anecdotes of billboards scanning cars as they pass to determine what FM station they are tuned to, however I can not find a source.
Similarly, though, radar detector detectors definitely exist.[0]
[0] https://en.m.wikipedia.org/wiki/Radar_detector_detector https://en.m.wikipedia.org/wiki/Radar_detector_detector
- microcolonel 8y agoI mean, distinguishing an attenuation related to receiving a signal from an attenuation from literally anything else seems a bit difficult, though I would imagine much simpler with radar.
- toast0 8y agoThe way to detect receivers is by detecting the characteristic radiation from the most common type of receiver circuit. https://en.wikipedia.org/wiki/Superheterodyne_receiver#Local_oscillator_radiation https://en.wikipedia.org/wiki/Superheterodyne_receiver#Local...
- mikestew 8y agoIt's how radar detector-detectors work. If they can tell if you have a radar receiver, I imagine turning a knob is all it takes to change it a FM radio detector.