How to select time step?

The GFINDER CLI search command (and SPICE GF subsystem) asks the user to specify a time step (often called the “step size”) that will be used to bracket roots.

• For binary state searches, the step size is used to bracket the endpoints of the intervals of the result window.

  • The step size must be shorter than any event of interest, and shorter than any interval between events that are to be distinguished.

• For numeric searches, the step size is used to bracket the endpoints of the intervals of the window on which the geometric quantity is monotonically decreasing.

  • The step size must be shorter than any interval on which the function is monotonically increasing or decreasing.

• In both cases, the step size must be large enough so the search completes in a reasonable amount of time.