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High Speed - Length

Created: March 17, 2022 | Updated: March 18, 2022 | Applies to version: 4

This document is no longer available beyond version 4. Information can now be found here: Length Rule for version 5

This documentation page references Altium NEXUS/NEXUS Client (part of the deployed NEXUS solution), which has been discontinued. All your PCB design, data management and collaboration needs can now be delivered by Altium Designer and a connected Altium 365 Workspace. Check out the FAQs page for more information.

 

Rule category: High Speed

Rule classification: Unary

Summary

This rule specifies the minimum and maximum lengths of a net.

All design rules are created and managed within the PCB Rules and Constraints Editor dialog. For a high-level view of working with the design rules system, see Defining, Scoping & Managing PCB Design Rules.

Constraints

Default constraints for the Length rule.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.

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