Signal Integrity-Differential Pair Design 6 (post-Wiring analysis)

Perform post-Wiring analysis on the differential pairs that have completed cabling.

(1) run the "analyze-Preferences" command, select Interconnect Models, and set the interconnection parameters.

(2) Click OK to close the dialog box.

(3) Open Allegro constraint manager, execute tools-options, pop up the options window, and set according to the figure:

(4) execute objects-filter in Allegro constraint manager. In the filter window that appears, Set

(5) Click OK to close the filter window.

(6) In Allegro constraint manager, double-click net-routing-Differential Pair:

(7) Right-click diffloopin in the objects table and select sigxplorer. The sigxplorer PCB Si GXL window is displayed:

(8) execute analyze-preferences from sigxplorer PCB Si GXL. In the displayed dialog box, set the pulse stimulus parameter:

(9) set the parameters of simulation parameters:

(10) Click OK to close the analysis preferences dialog box and execute analyze-Simulate. After simulation, the sigwave simulation waveform is displayed:

(11) Select pci5 u37 39_pci5 u37 38_diff, right-click and select display.

(12) execute graph-eye dimo-mode to display the specified area (0 ~ 1.7ns ):

(13) add a line:

(14) sigwave: execute file-exit.

(15) sigxplorer executes file-exit.

(16) Allegro constraint manager executes file-close.

(17) Allegro PCB Si GXL executes file-exit.

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