Issue link: https://resources.pcb.cadence.com/i/1532919
Steps: Just like how you created a physical constraint set earlier in this guide, you can set the values for inter pair and intra pair skew. We won't make a constraint but will instead modify an existing one. 1. Open the Constraint Manager. 2. Instead of making constraint sets then applying them we will navigate to an existing applied constraint set, simply navigate to our existing Spacing Constraint set USB_SIGNALS, in the Physical Physical Constraint Set > All Layers worksheet. 3. Notice that the USB_SIGNALS(5) cell name is a net class (shown on the far left as NCls). 4. As shown in the 3D component spacing constraint set, we can make class to class rules. Let's say we want any different pair net class to be at least 40 mils away from any other differential pair net class - go to the worksheet under Net Class-Class > All Layers, right click the USB_SIGNALS(5) Net class, then create a Net Class to Class spacing constraint (see below). 5. You will get a new window where you set the first class and then the second class you want to make rules between. 19 www.cadence.com OrCAD X Constraint Management Guide