Peter C. Wallace wrote: > One difference is that the TTL inputs have an RC filter, the differential > inputs have none. > > I wonder if your index outputs can drive the termination resistor. Have you > measured you index and /index outputs for reasonable differential output > voltage when terminated by the 7I29? > Very good point! Some of these open collector encoders with puny 1 K (or even higher) pull-up resistors will not give a whole lot of signal with a 100 Ohm termination. It wouldn't take a lot of electrical noise to reduce that noise margin to zero.
Jon ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
