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The measuring equipment used on this website?

Thank you for the filter advice.
I added 11th eliptic -60db 15khz filter and adjusted the pulse to be 10us on every 0 crossing once high passed it forms positive and negative impulse that generates only pair harmonics. I adjusted the level to 0.005% distortion measured at the sampler input.
0.005% crossover.JPG
The FFT of the input of the sampler and the output are shown for 50 cycles, the output sampler has slight attenuation.

with 0.005%.JPG
 

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  • sampler with 11th eliptic.JPG
    sampler with 11th eliptic.JPG
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