TLP/RLP916 Troubles

I want to trasmit data in intervals of 1 second but the couple of transmitter and receiver but I get wrong data with a lot of noise!!!

but if I send always data, I received this data in a correct way

What is happening???

Please do a search on the forum for more info, a lot of information is available. You may want to take a gander at this posting : http://www.sparkfun.com/cgi-bin/phpbb/v … .php?t=246

-Nathan