Spectral Extrapolation Techniques

When performing a time analysis where lower frequencies are not simulated and need to be estimated, different options are available to extrapolate the spectral component of the simulation result to 0 Hz.

On the Time analysis tab, in the Add time domain results group, click the  dialog launcher.

Figure 1. The Time analysis options dialog.
Note: The adaptive sampling technique provides more accurate low frequency extrapolation than linear interpolation but can be less predictable.