Ports

The Ports page is opened when you select "Ports" in the side bar menu of the Circuit Settings dialog box.This page allows you to view and modify the impedance values of all the ports in your circuit simultaneously. You may also automatically renumber your ports. There is an entry row for each port number, in which you can enter the following values in their respective text boxes:

• R: Resistance (in ohms)
• X: Reactance (in ohms)
• L: Inductance (in nanohenries)
• C: Capacitance (in picofarads)

Note that more than one port may have the same port number and they share the same parameters. Also, negative port numbers use the same parameters as positive port numbers, e.g. Port -1 and Port 1 use the same set of parameters

The bearing of the values on the port are as depicted below.

If there are too many ports to be displayed all at once, use the scroll bar to access the entry rows for the other ports.

TIP: You may also enter the impedance value for a particular port by selecting Object => Port Properties when the port is selected in the project editor window.

Renumber: Ports in your circuit must be numbered sequentially prior to analysis. Clicking on this button will renumber all of the ports in your circuit so that your port numbers are all numbered sequentially. This command is useful if you have deleted ports. If you have multiple ports that use the same number, you will be asked if you wish to keep the duplicates or renumber them. Ports numbered zero are not affected by this command; all other ports are renumbered.

 For a detailed discussion of ports, see the chapter Ports in the Sonnet User's Guide.