#Altium designer 16 how to

Tolerance - specifies a length tolerance when comparing each net with the longest net in the set.

Delay UnitsВ - choose this option toВ define the length as a time (how long the signal takes to travel along that length of route).

Length UnitsВ - choose this option to define the length as a distance.

Roll the mouse over the image to compare the two modes of ConstraintsДefault constraints for the Matched Lengths rule.

#Altium designer 16 how to

For detailed information regarding how to target the objects that you want a design rule to apply to, see Scoping Design Rules. For a high-level view of working with the design rules system, see Constraining the Design - Design Rules. (LongestLength - tolerance) в‰¤ CurrentLength в‰¤ LongestLengthДЄll design rules are created and managed within the PCB Rules and Constraints Editor dialog. Other targeted nets will pass the rule if their Current Length is:

The set of nets being targeted is defined by the scope of the rule (as defined by its full query), with the reference length (the longest net in the set) being determined by the rule scope, in combination with the Constraints settings.

Depending on the signal switching speeds, the function of the signal, and the materials used in the board, the allowed difference could be as much as 500mils, or as little as 1mil. This rule is essential in a high-speed design, where the challenge is not just about how long it takes the signals to arrive (which is determined by their overall length), but how important it is that the specified signals arrives at the same time. This rule specifies the allowable difference in net lengths. How Duplicate Rule Contentions are Resolved.