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Beat frequency - Square signal

Made with microcap v12 The text in the picture shows the "equivalence" of the 2 formulas.
Antonio51's user avatar
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Understanding dBm value of FFT measurements

For measuring amplitude in an FFT, the flat top window is recommended. For looking at spectra detail a Hamming, or something similar like Hann or Blackman-Harris, is recommended but may suffer from ...
qrk's user avatar
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2 votes

Understanding dBm value of FFT measurements

A window is a function multiplied by your input. If you multiply your input by a function then the value of your input changes. There are correction factors that can be used for different windows, or ...
user1850479's user avatar
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Beat frequency - Square signal

I'd say the result you got for the two sine waves is logical: you can only create new frequencies using nonlinear operations, and addition is a linear operation. So, a beat frequency can't arise from ...
Marcus Müller's user avatar
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Does the FFT in LTspice not work properly?

Made with microcap v12 FFT is calculated on a "number" of points. If you change this number, then it should be ok. I make the test with using 1024 points ... and 1 048 576 points where it is ...
Antonio51's user avatar
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