Working with the Length Design Rule on a PCB in Altium Designer
Created: September 25, 2019 | Updated: September 26, 2019
| Applies to versions: 20.0, 20.1 and 20.2
Now reading version 20. For the latest, read: Working with the Length Design Rule on a PCB in Altium Designer for version 21
Rule category: High Speed
Rule classification: Unary
Summary
This rule specifies the minimum and maximum lengths of a net.
Constraints
Default constraints for the Length rule.
- Length Units - choose this option to define the length as a distance.
- Delay Units - choose this option to define the length as a time (how long the signal takes to travel along that length of route).
- Minimum - the value for the minimum permissible length of the net.
- Maximum - the value for the maximum permissible length of the net.
How Duplicate Rule Contentions are Resolved
All rules are resolved by the priority setting. The system goes through the rules from highest to lowest priority and picks the first one whose scope expression matches the object(s) being checked.
Rule Application
Online DRC and Batch DRC.