User`s guide

11
-
20 Transient Analysis
Fi
g
ure 11-6
Hysteresis Curve Example: Schmitt Trigger
Fourier Components
Fourier analysis is enabled through the transient analysis setup
dialog box. Fourier analysis calculates the DC and Fourier
components of the result of a transient analysis. By default, the
1
st
through 9
th
components are computed, however, more can be
specified.
You must do a transient analysis in order to do a Fourier
analysis. The sampling interval used during the Fourier
transform is equal to the print step specified for the transient
analysis.
When selecting Fourier to run a harmonic decomposition
analysis on a transient waveform, only a portion of the
waveform is used. Using Probe, a Fast Fourier Transform (FFT)
of the complete waveform can be calculated and its spectrum
displayed.