Mitch,

    I'm not a design genius so take this question as a grain of salt.

But doesn't the shorter risetime mean your traveling (transmission line

theory) through quicker hence less crosstalk?

 

Help me tooo.

 

Groovy

 

Mitch Morey wrote:
> 
> I'm very surprised I haven't gotten ONE response to this yet. With the trouble
> with the IPC net going on, I'm guessing it might not have gotten out to the
> general public.
> 
> Anyone?
> 
> ----- Begin Included Message -----
> 
> HELP!  The engineer I work with has some issues I am hoping someone can
>        enlighten me on.
> 
> > I have been using Automata in the past but stopped becuase something
> > doesn't seem right about the results it gives.  Maybe I am wrong but
> > shouldn't the crosstalk increase when the signal rise time increases
> > if all else is held constant?
> 
> > When I use the Automata Engineering Tools for doing lateral crosstalk
> > calculations the slower the rise time the larger the crosstalk result
> > becomes.  Just doesn't seem right to me.  Again, maybe I'm wrong!
> 
> Here is two calculations from Automata:
> 
> Automata's Lateral Crosstalk Modeling
> 
> You submitted the following name/value pairs:
> 
>      Er = 4.3
>      h1 = 8
>      h2 = 8
>      t = 1 Oz
>      w = 6
>      sx = 6
>      length = 2
> **** risetime = 1.9 ****
> 
> The crosstalk = 24.9 mv/v
>                 ----
> 
> Automata's Lateral Crosstalk Modeling
> 
> You submitted the following name/value pairs:
> 
>      Er = 4.3
>      h1 = 8
>      h2 = 8
>      t = 1 Oz
>      w = 6
>      sx = 6
>      length = 2
> **** risetime = 3.1 ****
> 
> The crosstalk = 31.9 mv/v
>                 ----
> 
> Does this seem correct to you?
> 
> Thanks in advance for any help.
> 
> ----- End Included Message -----
> 
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