>In to Out ? The general convention is that unless otherwise specified, In and Out refers to the device it is written on, and nothing else. Therefore the connections should be Out -> Xin and Xout -> In. But, conventions are made to be broken. Anyway most resonators work both ways in my experience, so you can't check like this ? ;-). How about asking the manufacturer ? Peter -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu