Issue link: https://resources.pcb.cadence.com/i/1532919
11. Alternatively, you can use this matrix directly to apply Class to Class spacing constraints between various classes. For example, in the POWER row, select the cell found in the USB_SIGNALS column, then choose DEFAULT. 12. This will set for every net in the POWER class to be the DEFAULT rule spacing away from everything in the USB_ SIGNALS class. 13. When you click on the worksheet Net Class-Class > All Layers again, you can scroll down/up to find the POWER Net class, then see that it now has rules for POWER to POWER and POWER to USB_SIGNALS. While this setting handles inter pair spacing, we also don't want these rules to cause traces and an error among themselves within their own classes. So, we need intra pair spacing. 1. Create an intra pair differential pair spacing constraint set by making a regular constraint set in Spacing > Spacing Constraint Set > All Layers. Right-click the top Dsn cell, Create Spacing Constraint Set, and name it SCS_INTRA_DP. 2. Once created, you can set the Line To Line spacing and other parameter values as you would like. 21 www.cadence.com OrCAD X Constraint Management Guide