Issue link: https://resources.pcb.cadence.com/i/1532922
In the image below, we show exactly what gets checked in the software for stub length. Image: A stub as defined in OrCAD X Presto PCB Editor. Purpose: To restrict the number of stubs on a trace's vias or on a net wiring topology to reduce signal reflections and maintain signal integrity. For high-speed designs, aim for zero or minimal stubs. When stubs are unavoidable, keep them as short as possible. Applies to: USB, HDMI and any other high-speed interfaces that need minimal fanouts or stubs to operate efficiently. Importance: Affects current-carrying capacity and signal integrity. Application: Power distribution, high-speed signals. Steps: 1. Open the Constraint Manager using Tools - Constraint Manager. TIP: As usual we will make a constraint set that holds the rules/constraints, then we apply that constraint set to a net, class, group or region. 2. Create an electrical constraint set under Electrical > Electrical Constraint Set > Routing > Wiring. Right click the Dsn cell's name. 39 www.cadence.com OrCAD X Constraint Management Guide