yongseok Posted February 2, 2020 Share Posted February 2, 2020 i enter 5V in FFT so maybe the result are just on impulse signal. but actuality my result have unexpected -'128 signals' (263~390 cnt ) why does -128 apear. and how to disapear unexpected value (-128) Link to comment Share on other sites More sharing options...
D@n Posted February 2, 2020 Share Posted February 2, 2020 @yongseok, Slow down, start from the top: What's in your design, what's your design doing, what inputs are you feeding it, etc. Debugging an FFT is just like any other engineering task: split the design into parts, and separate what's going into the FFT from its surroundings, then test each individually. With the information you've given above, it would be hard to know where to start breaking down the problem. Dan Link to comment Share on other sites More sharing options...
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yongseok
i enter 5V in FFT
so maybe the result are just on impulse signal.
but actuality my result have unexpected -'128 signals' (263~390 cnt )
why does -128 apear.
and how to disapear unexpected value (-128)
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