Issue link: https://resources.pcb.cadence.com/i/1532919
10. You can also create and sort by entire package classes to make package class to package class spacing available (it pulls up the classification list you would have created in previous steps depending on your needs). This means that as long as a component falls within a class, it will space itself a certain distance away from any component found in another component class. Component-to-component spacing in 3D 11. Once your 3D spacing constraints have been created, you can go to the worksheet found under 3D > 3D Clearance > Design > Component to Component, then select the dropdown option under the Referenced package to package 3D CSet column to apply your constraint set (shown below). Impact: Improves manufacturability, reduces assembly errors, and enhances thermal performance of the PCB by keeping components sufficiently separate from each other to avoid overheating and other thermal related issues (proximity to other components, primarily). Related to: Surface placement of components (top vs. bottom). Differential Pairs Spacing (Class to Class Spacing for Crosstalk Mitigation) We addressed the physical constraints of differential pairs, but we must address their classes for spacing purposes so we can avoid crosstalk and signal degradation. In this section we will analyze the spacing differences in differential pairs and how that is executed in the Constraint Manager. 18 www.cadence.com OrCAD X Constraint Management Guide