Issue link: https://resources.pcb.cadence.com/i/1526746
All the columns in this spreadsheet have some kind of spacing rule for one object to another object. For instance, the column that says "Line To" - then "All" below means this column sets the space from the edge of a 'line' (this is a trace in OrCAD X Presto PCB Editor) to all other objects. That means whether it's a via, another trace edge, or a mounting hole, we want that gap to be a certain distance from the edge of the trace to the edge of the next object. 17. Let's set this rule to 10 mils (0.254 mm) by clicking on the *** field, then typing 10 (or 0.254), then hitting Enter on your keyboard or Tab to populate that field. 18. Notice that the values in that field show up in all the rows below SCS_USB. This means that there are conductor layers (basically copper layers) named TOP layer and BOTTOM layer. For all the traces and conductors on those layers, the spacing rule for any 'lines' (traces) on those layers is 0.254 mm from edge to other objects. Now, this set of rules (Spacing Constraint Set) can be applied to any object or group of objects we want. 19. Let's go back to the Net Group we created in the Spacing - Net - All Layers spreadsheet, then scroll down to 'USB_ALL'. 20. Now the moment of truth. Instead of the DEFAULT rules being applied to the USB_ALL net group, we will apply the SCS_USB (Spacing Constraint Set, USB). 21. Click the field that says DEFAULT, then you will see all the spacing constraint sets drop down and become available. Also notice how the Net Group we created is labeled as NGrp. 16 www.cadence.com Part 1 of 5