3 ms·
It makes sense. Every arc is an impulse and that's wideband noise. (The FFT of a spark is basically a horizontal line.) The earliest radios were spark gap trans
by dreamcompiler 6y ago
It makes sense. Every arc is an impulse and that's wideband noise. (The FFT of a spark is basically a horizontal line.) The earliest radios were spark gap transmitters.
- mhh__ 6y agoFor an impulse, the FT is a straight line for anyone interested .
- mjb 6y agoBut sparks and arcs aren't impulses. They're much more interesting than that spectrally, including with significant peaks and harmonic components. These properties are things that protection equipment can use to detect and localize faults.
- mhh__ 6y agoSure, the PC said fast Fourier transform rather than Fourier transform so I pointed out the "underlying" identity
- dreamcompiler 6y agoAgreed, of course. A spark is an approximation of an impulse. I should have said that.