A stub as defined in OrCAD X Presto PCB Editor
Purpose of Stub Length Limits: To restrict the length of a copper stub connecting to a trace's vias or on a net wiring topology
to reduce signal reflections and maintain signal integrity. For high-speed designs, aim for zero or minimal stub lengths,
keeping them as short as possible.
Applies to: USB, HDMI, and any other high-speed interfaces that need minimal fanouts or stubs to operate efficiently.
Max Exposed Length
Refers to the amount of exposed copper that extends out from the soldermask on your PCB. It's part of the stub shown
earlier. We recommend setting this as small as you can if this is a very important setting for your PCB. Otherwise, you can
leave it blank for now.
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OrCAD X High-Speed Digital Design Guide
