Hi all, back to main question, measure 0-50Hz with 0-400Hz panel. The internal principle of low frequency measurement based on measure time between edges. As the most suggestions they will produce a burst of 8 pulses per rising edge of incomming signal. Do you know about the method of your panel? Over how much cycles does it count, what is the refresh (scan) time? I'm afraid that you'll get a lot of jitter on your panel. Only a point of thinking about.... Ulrich Herschke mailto:herschke@web.de -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body