Matthew, Is the serial data you are applying to the transmitter of the proper level, or are you directly applying RS232 level signals? If so, first convert the RS232 levels to 0-5v level signals. That might be the source of your problem. Fr. Tom McGahee ---------- > From: Matthew Ballinger > To: PICLIST@MITVMA.MIT.EDU > Subject: Serial directly to Ming xmitter. > Date: Monday, February 08, 1999 7:33 PM > > I've been reading postings every once in a while stating that PICliste rs have > connected RF transmitter directly to serial outputs to send data. I have been > using the Holtek series encoder/decoders to send data via a Ming transmitter > and this works fine, but I have tried everything to get good data be sent > using normal async serial data sent at 1200 baud. Looking at the data out from > the receiver with a logic probe it looks like I'm getting too much other > noise. How is this noise filtered and not the data? Or is this just a bad > selection for an RF transmitter/receiver pair? Thanks too all. > Matt