Proteus fourier analysis

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T silva

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I want to show frequency spectrum of an fm signal using fourier analysis graph. The carrier frequency is around 90 Mega. I selected max frequency =100 mega and that did not work. In case my circuit had a problem, I used (a signal generator +resistor)with 10 mega Hz sine wave just to verify. It took forever to finish calculating the points but there was no graph.A 10k Hz sine worked fine. What changes do I need to make in edit properties window? Start time,stop time,frequency,resolution...? Can someone plz help me selecting the correct parameters?
 

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Hi,

There are several fourier anlyzing methods.
Often used: FFT.
But an FFT is a digital algorithm.
Your post gives no hint about anything "digital".
T silva said:
...and that did not work...
Click to expand...
I'd say a fourier analysis works in either case.
But maybe the result is not like expected. We nether see the result nor do we know what you expect.

Klaus
 

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I want to have these kind of spectra for the fm signal:


*Image taken from

Signal Processing Stack Exchange

Q&A for practitioners of the art and science of signal, image and video processing
dsp.stackexchange.com
 

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