> Can anyone give me some guidance here? You don't specify which NI board you're using, but if you're reading your TCs differentially (and you probably should be), then you only have channels 0-7 available. I'm guessing that comedi just reports differential measurements on channels 8-16 as a wraparound of 0-7. Caleb _______________________________________________ comedi mailing list comedi@comedi.org https://cvs.comedi.org/cgi-bin/mailman/listinfo/comedi