Electronics > Beginners

Oscilloscope: Square wave view while in FFT mode?

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SilverSolder:

--- Quote from: tinkerbotstl on January 29, 2020, 06:11:52 pm ---Thanks, I'm primarly trying see the harmonics on a AC line.  Then I want to see if that passes on to a computer power supply, and ultimately to the USB ouput.

--- End quote ---

Are you getting audio interference in a USB sound card or something like that?

tinkerbotstl:
I was specifically hoping to avoid all of the comments about the dangers of probing mains.  Just need to see the harmonics on the AC line.

james_s:
Well your original question made no sense at all, because there's no such thing as a "square wave view", if you want to look at the frequency spectrum of a square wave, you feed a square wave to the scope, the FFT on the scope displays the spectra of whatever signal you put into it, nothing more.

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