AnsweredAssumed Answered

FFT understanding ......

Question asked by malli_1729 on Jul 20, 2014
Latest reply on Jul 22, 2014 by algoss
Hi,

I am doing FFT on Wavegen signal, 100k Sinewave.

FFT settings:
Span : 500Khz,
Center - 125Khz,
500kSamples/s

As my sampling rate is 500 Ksamples/S --> spectrum will be 0 -250Khz.

as span - 500K, each div -> 50K and center freq  ->125K..because of this, left side divisions of scope are negative (*-125K,-75K,-25K*,25K,125K(Center freq),175k,225K,275K,325K,375k).
My spectrum is existing from 0-250Khz.

what are these negative frequencies.....why they are appearing......  

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