https://meocloud.pt/link/c794215c-b3...018.34.02.png/
that's how I produced the sample, and that's the oscilloscope showing no signs of disturbance, plus an FFT analysis of the frequency spectrum showing a single harmonic in there. FFT resolution isn't big enough to show a perfect line on low frequencies for reasons - again - I'm not going to explain to you.
This turned out to be even a bigger mess then I thought it was. So as of now, I rest my case. Cheers.
