.STEP -- Parameter Sweeps

This command causes an analysis to be repeatedly performed while stepping the temperature, a model parameter, a global parameter, or an independent source. Steps may be linear, logarithmic, or specified as a list of values. The first .step dimension is sorted to be in increasing order so as not to confuse the waveform viewer.

Example: .step oct v1 1 20 5

Step independent voltage source V1 from 1 to 20 logarithmically with 5 points per octave.

Example: .step I1 10u 100u 10u

Step independent current source I1 from 10u to 100u in step increments of 10u.

Example: .step param RLOAD LIST 5 10 15

Perform the simulation three times with global parameter Rload being 5, 10 and 15.

Example: .step NPN 2N2222(VAF) 50 100 25

Step NPN model parameter VAF from 50 to 100 in steps of 25.

Example: .step temp -55 125 10

Step the temperature from -55°C to 125°C in 10°C steps. Step sweeps may be nested up to three levels deep.