On Nov 25, 2008, at 12:06 PM, PAUL James wrote: > In a typical radio receiver I think he said this, but just to make it clear: He's not building a "typical radio"; he wants to digitize the actual RF signal, and do all the processing that would normally happen post- RF, digitally, in an FPGA. I don't know exactly how one does this (especially WRT "tuning"), but it seems to be one of those "up and coming" things. As someone else said, see "Software Radio." BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist