Would it help to have a high / central location reflector (or just place the tx/rx there) that gave a good line of sight 1st path at all times. Would burst transmission help with fast data rate bursts followed by longer quiet periods to allow echos and longer paths to fade. Russell --=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 .