h. Neck Width = 0.0965 mm (3.8 mils)
i. (+)Tolerance = blank
j. (-)Tolerance = blank
You may set your desired Tolerances at the end, but ensure that the (-)Tolerance value does not cause the Neck Gap spacing
to be less than the Min Line Spacing setting, else you will get an error message.
Notes:
1. Static phase is used to manage the skew on a set of differential pairs.
2. Dynamic phase controls how much we allow the differential pair signals to be out of phase in real-time, to avoid common
mode voltage and the noise it creates.
3. Primary gap is the edge-to-edge distance between two differential traces in unrestricted routing conditions.
4. Neck gap is the edge-to-edge distance between the two differential pair traces but when 'necking down' on the PCB; it's
usually to get through tight areas.
As with any ECSet, you can create your own Differential Pair Classes and fill in their properties as necessary.
We have created our electrical constraints, now it's time to create net classes to apply those electrical properties to.
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OrCAD X High-Speed Digital Design Guide
