The PI Model Options dialog box is opened when you click on the Model Options button in the Output Pi Model dialog box.
Rmax: Maximum allowed resistance (ohms). The default value is 1000.0 ohms.
Cmin: Minimum allowed capacitance ( pF). The default value is 0.1 pF.
Lmax: Maximum allowed inductance ( nH). The default value is 100.0 nH.
Kmin: Minimum allowed coupling coefficient (dimensionless ratio). The default value is 0.01.
Rzero: Resistor to go in series with all lossless inductors (resistance in ohms). The default value is 0.0.
Separation (%): This value is a percentage used to select the gap between the two frequencies used to generate a SPICE model. The default value is 10%. In this case, a SPICE model is generated using the first frequency and the next highest frequency which provides a 10% gap. This continues until there are no more frequencies.
Restore Defaults: Clicking on this button changes all the settings in this dialog box to the defaults used upon installation of the software.