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 ----- > > *************************************************************************** > * TechNet mail list is provided as a service by IPC using SmartList v3.05 * > *************************************************************************** > * To subscribe/unsubscribe send a message <to: [log in to unmask]> * > * with <subject: subscribe/unsubscribe> and no text in the body. * > *************************************************************************** > * If you are having a problem with the IPC TechNet forum please contact * > * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * > ***************************************************************************