At 11:27 PM 1/25/00 +0000, you wrote: >Hi >I have a requirement to transmit low rate (9600bps) half duplex data from a PIC >based slave device back and forth to a main controller via a single coax, >Has anybody ever found a solution to this? Any ideas or pointers would be >greatly appreciated. Simon, We do this all the time. We use two RF frequencies (50.5 forward, 22.5 return) to allow us to transmit on the cable. If you are serious about this, and need volume, I suggest you contact http://www.icommsys.com about it. I just quick working for them as an employee last week. Andy ================================================================== New Microprocessor support forum mail list - details on our site ------------------------------------------------------------------ andy@rc-hydros.com http://www.rc-hydros.com - Race Boats andy@montanadesign.com http://www.montanadesign.com - Electronics ==================================================================