The following controls appear in the Port Properties dialog box when Via is selected as the port type.
Terminal Orientation: These two radio buttons allow you to specify to which polygon the negative and positive terminals of a port are attached.
Termination: Enter the four impedance values in the text entry boxes: Resistance (in ohms), Reactance (in ohms), Inductance (in nanohenries), and Capacitance (in picofarads). You may not change the normalizing impedance for Ports numbered zero (0). The entries are disabled whenever the port number is zero.
For a detailed explanation of ports and how they are modeled, please refer to Ports in the Sonnet User's Guide.