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Trace length (pad to pad)

autodeskguest

Is there a way to get eagle to report the trace length from pad to pad?

 

Doing this by hand is not practical or accurate when trying to equalize

the phase between two different nets.

 

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  • in reply to Richard_H

    Richard Hammerl a écrit :

    VectorHead schrieb:

    Is there a way to get eagle to report the trace length from pad to pad?

     

    Doing this by hand is not practical or accurate when trying to

    equalize the phase between two different nets.

     

    Try length.ulp or length-freq-ri.ulp.

     

     

     

    Hi

     

    The to ulp files "length.ulp"  and "length-freq-ri.ulp" are wonderfull

    programms.

     

    But the problem with it is that they calculate the all lenght of a signal.

     

    It could be nice if they can calculate the length of a signal

    from a pad to pad of 2 parts and not the length of the all signal.

     

    for exemple:

     

    I have an bus Processor connected to 2 SDRAM.

    The Data Bus goes from the processor to the 2 SDRAM.

    Let's take the signal D0.

     

                                   => Wire2 => SDRAM1.D0

    Processor.D0 => Wire1 => Via

                                   => Wire3 => SDRAM2.D0

     

     

    Processor.D0______/----

    SDRAM1.D0

                       \____________SDRAM2.D0

     

    If I use "length.ulp"  and "length-freq-ri.ulp", the length calculated

    for the signal D0 will be :

         Length Signal D0 : Wire1 + Wire2 + Wire 3

     

    But it will be wonderfull to select : Parts Processor, SDRAM1 as

    argument and the programm return :

         Length Signal D0 : Wire1 + Wire2

         Length Signal D1 : ...

         Length Signal D2 : ...

         Length Signal D3 : ...

         ...

     

    for the all commun signals between the to parts.

     

    This will help a lot for the lentgh matching when routing high speed Board's

     

     

    I dont know if this is easy to do.

     

     

    Best Regard's

     

    AbdAllah MEZITI