Hi, I am trying to build a simple one way serial radio link between two pic circuits. I do not seem to be getting a signal and I am not sure how to test the radio xmit and rcv boards. I have a function generator and a tds 210 60 Mhz scope. I tried putting a 500 hz square wave in the xmitter and scoping the linear output pin but no joy. I originally tried putting character data thru the xmitter at 300 bps. Anything I received came out as garbage. I am not sure if it was picking up garbage or if the data was being mangled. My data packet was 5 AAh followed by 5 letter "F". I don't think it is the code because it comes out on hyperterminal fine. Also I am sending the data using a software uart with inverted serial data. The xmit and receiver modules are here >>http://blitzlogic.8m.com/rf.htm Any help or suggestions would be appreciated. Thanks, Kevin (The software guy :)) _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist