On 1/29/06, David P Harris wrote: > Looks to me like the transmitter is very simple, but the receiving is > very hard. The receiver has to filter *syncronized* to the transmitter, > or else you have to slide the receiver filter along until you get the > signal. It doesn't look at all easy to build that par - but I hope I > am wrong! Receiving is very similar to spread spectrum technology, with a sliding comparator. At least conceptually. So it's a solved problem, we just need to implement it. -Adam -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist