On Thu, Apr 20, 2017 at 8:54 PM, Danny Miller <dan...@austin.rr.com> wrote: > Leadshine drives input/output are not just opto, they're differential. > i.e. the step signal has 2 wires and dir has 2 wires,
You are right the noise impunity could be VERY good. But I bet 99% of users simply tie one end to ground and send single ended pluses. ( But I'd say you don't get to complain about noise if you do this.) > Fiber optic requires serialization, added a lot of new complexity and > latency, for no real benefit. Two comments on that.... (1) One COULD use a bundle for fibers just like they use a bundle of wires. Replace each wire with one fiber. It is not that horribly expensive. But why bother? (2) Serialization is not hard and is already done for you if your Mesa FPGA card is the Ethernet type. Simply use a fiber Ethernet link. (3) Benefit, I agree. Fiber only makes sense in an application where even shielded twisted pairs can't work. Or if you need isolation from lightening strikes -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
