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The signal, after passing through a power supply, looks like this:- exactly 92 sine waves, about 0.9Hz, of amplitude ~70mV- a 10 second pause with no noise and no signal- repeatBetween each sine wave is another very short pulse of what appears to be a very high frequency signal. It is perfectly synchronized with the sine wave.[...]But my real question is . . . What the heck does this?!
The starting point of the X10 home automation installation is the emission of signals through the mains, this will use a carrier signal frequency 120 kHz, a duration of 1 ms and is issued by passing through zero wave the conventional electricity grid. I.e. we have a signal at a frequency 2400 times greater than the frequency of the mains.