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Working with the Overshoot - Falling Edge Design Rule on a PCB in Altium Designer

Created: 三月 17, 2022 | Updated: 三月 18, 2022 | Applies to version: 21

This document is no longer available beyond version 21.0. Information can now be found here: Overshoot - Falling Edge Rule for version 25

 

Rule category: Signal Integrity

Rule classification: Unary

Summary

This rule specifies the maximum allowable overshoot (ringing below the base value) on the falling edge of the signal.

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 Overshoot - Falling Edge rule.Default constraints for the Overshoot - Falling Edge rule.

  • Maximum (Volts) - the value for the maximum permissible overshoot on the falling edge of the signal.

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

Batch DRC and during Signal Integrity analysis.

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