At 07:01 PM 10/6/2009, David Duffy (AVD) wrote: >As you say, DMX is still 250K even if you're sending less than a whole >universe. How does the number of channels change the bandwidth >requirement of the isolation components? Have a processor that listens to the appropriate channels, then sends the data from those channels over the isolation barrier. That can be at a much lower data rate. In other words, add some smarts to the input side of the isolation barrier. dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist