thanks for the appnote link.It looks like there's everything I need to know
there,at least for the receiver.But I guess I can implement the transmitter
on my PC and send data through the rs232 which should make things easier.If
you have any docs on a transmitter design let me know.

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics