Use this dialog to use any Differential Pair Nets Rules defined to your design to create new differential pairs. You can also use the rules to apply new names to existing Differential Pairs. It is accessed from within the Differential Pairs Dialog dialog using the Create Pairs From Rules button.
Shortcuts
Menu: Setup
Default Keys: T
Command: Technology
Locating this option
Available from: Setup menu > Technology option > Differential Pair tab > Create Pairs From Rules button
Using the Differential Pair Nets dialog
The dialog is split into two sections; Differential Pairs that will be created and Differential Pairs that already exist, but will be renamed or have an attribute added or changed.
Differential Pairs that will be created
The number next to this header informs you of the number of potential new Differential Pairs that will be added to your design if all the rules available are applied. The main list is a summary of all the Differential Pair names and their paired nets. By default, the Create check box next to each name will be selected (so that all new Differential Pair Names required will be added). If the new name is blank then the name will be the default name generated from the four pins names. Uncheck this box if you do not wish to create a new pair in your design. If you do this, care should be taken to ensure you have not missed a pair that you defined in the rules.
This list is applied when the OK button is pressed at the bottom of the dialog.
Differential Pair that already exist
This reports any matches between the rules defined and the Differential Paired nets already in the design. The number displayed next to the header is a match based on the rules defined. Using the Rename check boxes, you can select which existing differential Pairs to rename. Again, care should be observed if you uncheck any of these as it means they match rules defined but you are choosing to ignore them.
This list is applied when the OK button is pressed at the bottom of the dialog.
Summary boxes
Summary boxes at the bottom of the dialog report an overall position to you based on the check boxes selected in the grids above and any rules that it fails to match based on the Differential Pair Nets Rules defined.
Number of Differential Pairs already created that match the rules, shows the number of Differential Pairs which match your defined rules and that exist in your design. This is shown as a reference for you.
Number of Differential Pairs already created that do not match the rules, shows how many Differential Pairs that are currently in your design that do not match any rules. This is a very useful check to ensure that if you do want to cover all Differential Pairs using rules, then this should read zero. If the number 1 or more is shown then there are Pairs that are not covered using a rule.
The Number of rules that were not matched shows that Differential Pairs rules have been created but there are no matches in the design to satisfy this.
Report
Use the Report button to report listing the Differential Pairs that already matched, did not match at all, and the rules that were not matched (with an explanation of why).
Related Topics
Technology Overview | Differential Pairs Overview | Differential Pairs Dialog | Differential Pair Nets Rules | Rules and Attributes | Differential Pair Chains | Differential Pair Gap Rules | Differential Pair Skew Rules | Differential Pairs Spreadsheet | Design Rule Check