As a result of some research I did in response to a related question, I have added a discussion on this topic to my Icom page. <http://www.qsl.net/ab4oj/icom/ic756pro_notes.html#BPF> Best 73, Adam, VA7OJ/AB4OJ North Vancouver, BC, Canada http://www.qsl.net/ab4oj/ Icom FAQ site: http://www.qsl.net/icom/