Good idea. I will try this. Will any metal box do for this? I sent the development kit back to the application engineer I have=20 contact with as requested but the support person I speak to is in=20 another place. He told he was trying to get hold of the returned kit=20 but he never come back on that. Guess he have other things too do and =20 is a bit fed up with all my questions now... But I still hope to=20 eventually get this info. I very much appreciate you guys taking time trying to help. Cheers /Ake Russell McMahon wrote: >> There is one sample that light a LED on the received board when a=20 >> button is pressed in the transmitter board. Does not work here. >> >> Another demo is rangetest. In this demo a led is lit as long as=20 >> packets reach the received board. Always led off here. > > > Suggestion: > > Make a screened box and try the simplest test possible with RX & TX in=20 > the box. IF that works you can suspect local interference. Even=20 > something like a steel (old technology) cake tin with a peep hole=20 > would do. > > Taking them somewhere else a substantial distance from where you are=20 > now and from cell sites may help as a test. > > Did your returned units work OK when they got them back? > > > RM > --=20 --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergav=E4gen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se =20 Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist