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Differential Pair Support,Constraint Manager

  • What's Good About Allegro PCB Enhanced Object Filtering? See for yourself in 16.6!

    The 16.6 Allegro PCB Editor release provides enhanced Object Filtering to control object display in the Constraint Manager (CM) Worksheet. This feature enables you to select and filter out objects that you want displayed in the CM worksheet. Read on for more details… The objects for diff pair...
    Posted to PCB Design (Weblog) by Jerry GenPart on Mon, Aug 12 2013
  • Differential Pair - Z Axis Spacing

    I am working with several hundered diff pairs and need to maintain a pair to pair minimum spacing on both the same and adjacent layers. Is there a way to set this up in constraint manager? I am running 16.3 Also, is there a new "Best Practices" paper for working with Differerential pairs in...
    Posted to PCB Design (Forum) by Liana on Tue, Feb 15 2011
  • What's Good About PCB SI Model Library Management? Look to SPB16.3 and See!

    The SPB16.3 release of Design Entry HDL (DEHDL) provides an easier method for setting up the PCB SI model library path, and brings more consistency to the Front-to-Back (F2B) and Back-to-Front (B2F) flows. Signal Integrity (SI) models are essential for running an SI simulation. PCB SI is an integrated...
    Posted to PCB Design (Weblog) by Jerry GenPart on Wed, Jan 19 2011
  • Differential Pair -Allegro Constraint managment

    Hi , I am new to allegro tool ... I have a GB Ethernet connector to which I have to connect 4 pairs of differential pairs .Now I want to match the length of all the differential pairs (and individual nets) to same length .how do I set the constraint and Also how do I apply the trace tuning. Thanks for...
    Posted to PCB Design (Forum) by Prapz on Sun, Oct 31 2010
  • Differential pairs disappears in CMGR

    We have a problem with differential pairs that disappears after exiting Constraint Manager. When we create a differential pair, save and exit CM and then go back into CM, they are gone. We think it depends on XNET and serial capacitors. Do anyone else seen this?
    Posted to PCB Design (Forum) by Javinder on Thu, Oct 16 2008
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