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Allegro PCB SI

  • PCB autorouter(spectraa) not converging

    Hi, I am making my first pcb with a xilinx fpga device(256 pin BGA package).I am simply connecting the all I/O's to 4 standard 40 pin connectors.Are padstacks necessary for PCB routing??.I have drawn the schematic in Capture imported it to Layout_Plus and autorouted it. But after 3 hours of autorouting...
    Posted to PCB Design (Forum) by bennyn1 on 09-02-2010
  • How to solve Error [ALG0029]

    Hello everybody, I am a rookie on PCB design. I got a problem with PCB design recently.So please help me to find out how to solve this Error. I used OrCAD Capture CIS to build the schematics. I copied the whole schematics from my friend, but I built all the component library in my computer. And I have...
    Posted to PCB Design (Forum) by fox0342 on 06-16-2010
  • Regarding Xnet properties getting lost

    Hi, I am currently using 15.7 Allegro PCB Design XL. I have assigned Models to components to assign XNET properties. Whenever iam importing the latest netlist the Xnet properties are getting lost. Our schematic engineers are using Mentor Dx Designer to generate netlist in .tel format. Every time I import...
    Posted to PCB Design (Forum) by kingshar on 05-26-2010
  • Regarding Models

    Hi All, I am currently using 15.7 Allegro PCB Design XL. I have assigned Models to components to assign XNET properties. Whenever I am changing the board file name is getting changed or when i am sharing the .brd filw iwth any of my collegues the Models are getting lost and thenit is throwing DRC's...
    Posted to PCB Design (Forum) by kingshar on 05-26-2010
  • launch allegro_free_viewer_16-3 with a Macro

    Hello, I would like to automatize the opening of Allegro free viewer and the display of my test-points all-in-one. I did some macro to display test-points and now I wondering how to launch-it automaticaly (by script) Let me know if you have any sugestion. Regards, Florent PS: I work on Windows XP OS
    Posted to PCB Design (Forum) by Flta on 03-03-2010
  • setup/hold time constraint

    hello, Is ther any mean that I can define setup/hold time constraint in constraint folder so that I can use it for similar nets?
    Posted to PCB Design (Forum) by seyyed morteza on 12-29-2009
  • import constraints worksheet in allegro 15.7

    Hi, Our client is giving all the length matching requirements in an Excel sheet. Is there anyway to import all these constraints directly into Allegro constraint Manager. Iam currently using Allegro PCB editor 15.7. Actually I tried exporting the worksheet file using the option Export--> Worksheet...
    Posted to PCB Design (Forum) by kingshar on 12-28-2009
  • Stimulus rise time in SpectraQuest

    Anybody know how to change the rise time of Stimulus in SpectraQuest? I want to simulate a channel at 6GHz with Tr=40ps, but the default rise time is 67ps and can't be changed. Furthermore, what should I do to add a external stimulus file into SpectraQuest, such as including a specific data pattern...
    Posted to PCB Design (Forum) by wowo1215 on 11-09-2009
  • Setting Dynamic Shape Parameters

    I am using Allegro 15.51 to generate dynamic shapes in my layout. I would like to use orthoganal thermal reliefs component pins in some locations and at other locations on the same shape to use full contact pins. Is there a way to do this using dynamic shapes?
    Posted to PCB Design (Forum) by ebstorrance on 10-22-2009
  • TDR simulation in allegro 16.2 SI

    Is this possible that i can do TDR measurement of traces in PCB 16.2 SI or simulation?
    Posted to PCB Design (Forum) by Fbhatti on 10-08-2009
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