http://chipdesignmag.com/sld/blog/2013/08/20/system-bits-august-20/ Does this mean a data link can be built that does not fade with distance ? A link that goes through lead walls heh heh Which cannot be jammed ? Gus in Denver --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .