4. If you choose the first option, be sure to set your units.
5. When ready, click OK.
6. We went with option 2, so we have some more steps to perform as listed in the previous window.
7. You may be prompted to Assign voltage to Power Nets.
8. You can choose to Auto-assign voltage values in subsequent designs if you want, but we will leave it blank for now.
Click OK.
9. Nothing will appear to happen, but if you go to the Capture menu and choose View - Session Log, it will pull up what
happened in the panel at the bottom of the tool.
10. The session log also reminds us of the next steps to fully activate and synchronize the Constraint Manager.
11. Once you have performed the PCB - Update Layout step and then the PCB - Update schematic step, go to PCB
Constraint Manager. The Constraint Manager window will appear.
12. Now you have access to set the constraints you want on the schematic side before even getting into the PCB layout.
13. You may also define your differential pairs, establish your Constraint Sets as needed, and apply them to all your nets.
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OrCAD X Constraint Management Guide