The differential pair marker can be found in a few different menus, including the schematic toolbar and just right clicking anywhere in schematic.

A marker must be placed on each of the two nets that make up the differential pair. Additionally, each net must have a net label of the same name, one ending in “_N” and the other in “_P”, indicating “negative” and “positive”.

The above image utilizes the “_P” and “_N” suffixes to establish they are the paired nets. See the below {X} section to learn more about the bus used on the right.

Once created in schematic, the exact impedance requirement is set using design rules. This can be set by using the design rules label mentioned in the above section or by adding it directly to the DIFFPAIR directive.

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