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Routing nets of same length

tltoth

Hi,

How can we make the PCB Router to route nets of same length? (e.g. buses)

 

Thanks

  • oldmouldy

    You will need the appropriate product level to configure the constraints in PCB Editor and the appropriate product level for PCB Router - which would be Router Performance, or Performance Option for PCB Editor - then PCB Router will follow the length constarints as far as it is able within the confines of the design.

  • tltoth

     

    Is the "Allegro PCB Performance Option L" adequate for this?

    If yes, which property refers to the length of nets in Constraint manager?

    Thanks

  • redwire

     Perf L is good.  Look under Electical Constraints and learn about Relative Propagation Delays and Min/Max routing.  Both will get you there but there is a distinct difference.

    Do some searches on here where I posted an archive for a guy looking how to do this.  It has a schematic and PCB for experimentation with these properties.

  • tltoth

    Thank you redwire.

    I give it a try.

     

  • tltoth

    Thanks redwire.

    I've found those files, but what is the difference between matbus.brd and matbus16.brd?

    Both have RELATIVE_PPROPAGATION_DELAY_TOL = 200 mils and they are routed differently.

    Regards,

    tltoth

     

     

     

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