Issue link: https://resources.pcb.cadence.com/i/1532922
In this new window, we want the net class on the left to be spaced a certain distance from the net class on the right (CLS1_ DIFF to itself, basically). Select those classes (CLS1_DIFF on the left and CLS1_DIFF on the right as shown), then click Apply, then Ok. A new row will appear on the worksheet as a CCls object underneath a NCls object…i.e. the CLS1_DIFF Net class nested under itself as a class-to-class spacing row. It means that any Net Class underneath that class is what the upper-level class is being spaced against (CLS1_DIFF to CLS1_DIFF spacing). Even if the class is itself like we demonstrate here, that's okay to do. Notice that there is no value set for this Class to Class spacing. We can type in the values manually, but as usual, it is better to set a Constraint Set specifically for the spacing we want first, then apply that constraint where appropriate. 61 www.cadence.com OrCAD X Constraint Management Guide