Defining a Twisted Pair

Define a twisted pair consisting of two cores that are twisted together for the purposes of cancelling electromagnetic interference. Each core can have an optional coating.

  1. On the Cables tab, in the Definitions group, click the  Twisted Pair icon.
    Figure 1. The Create Twisted Pair dialog.


  2. Under Core, from the Metal drop-down list, select one of the following:
    • To create a PEC core, select Perfect electric conductor.
    • To create a core consisting of a predefined metal, select a metal.
    • To create a core consisting of a metal, which is not yet defined in the model, click the icon to define a metal or add a metal from the media library.
  3. Under Insulation layer (coating), specify the following:
    • To remove the coating, clear the With insulation check box.
    • To add a coating, select the With insulation check box.
      • To add a coating consisting of a predefined dielectric, select a dielectric.
      • To add an insulation layer consisting of a dielectric, which is not yet defined in the model, click the icon to define a dielectric or add a dielectric from the media library.
  4. Under Twisted pair, in the Radius field, enter the outer radius of the twisted pair cable.
  5. Under Twisted pair, in the Pitch length field, enter the axial length required to complete one revolution of the strand around the diameter of the conductor.
  6. Under Twisted pair, in the Turn direction drop-down list, select one of the following:
    • To define a twisted pair with its strands turning right, leading away from you, select Right.
    • To define a twisted pair with its strands turning left, leading away from you, select Left.
  7. In the Label field, add a unique label for the twisted pair.
  8. Click Create to create the twisted pair and to close the dialog.