Issue link: https://resources.pcb.cadence.com/i/1526746
Benefits of Net Groups: f Provides a higher-level organization of nets f Allows for consistent rule application across domains EXAMPLE - CREATE A NET GROUP Let's say we want to group all nets related to a specific interface (e.g., USB) because we want to apply common rules, like routing topology and spacing among all of them. This is where we create the Net Group. 1. With OrCAD X Presto PCB Editor open, select Tools - Constraint Manager from the toolbar menu. The CM will appear. 2. Go to the Spacing - Net - All Layers worksheet (shown below). 3. Scroll down the spreadsheet and select the 'USB_SIGNAL(S)' cell. This is a defined group for all USB signals, a perfect example of a group. But let's go a step further, because the signals have the same Spacing Constraint Set already. Let's make a group called USB_All, which includes some USB C nets. 4. Scroll down to USBC_CC1, select it, then select the rest shown in the image below, down to USB_TYPA_SS (see below). 5. With those nets selected, they have different impedance profiles if put in their own classes, but can still be part of the USB_ALL group. 6. So right-click any of the highlighted blue cells. 7. Choose Create… - Net Group… 8. A new window named Create NetGroup appears. It has the list of nets being considered for this new net group we're about to create. 9. In the NetGroup field, type UBS_ALL. 10. Click Ok. The window will disappear. 14 www.cadence.com Part 1 of 5