Layer Restrictions
Purpose: Control EMI by limiting the layers through which a trace can be routed. For example, keep high-speed signals on
internal layers sandwiched between ground planes for better shielding.
Example:
1. Within the Constraint Manager, go to the Electrical Constraint Set > Routing > Wiring worksheet.
2. Create an electrical constraint set and give it a name (e.g. ECS1) shown below.
3. Click the cell under the Layer Sets column that is in the same row as your ECS1 row. The Select Layer Sets window
appears.
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OrCAD X High-Speed Digital Design Guide
