003_FM_Source : Frequency Modulated Source
Minimum Versions: SmartSpice 4.6.5.R
input deck shows you how to produce a single element that behaves as a Frequency Modulated (FM) source.
show how the final frequency modulated waveform output looks in the time domain for both full and zoomed time periods.
The lower plot of the 3 shows a rough FFT interpretation of the transient waveform.
(Remember that an FFT is a cyclic analysis requiring regular-spaced, time period samples.
So to construct this FFT from the irregular-spaced, transient analysis timepoints, some distortion is introduced - the minimum value only gets down to -60db level).
To do an accurate FFT plot use
and do an