OMG!
How can I test a receiver if I dont connect it to the transmitter???
The light table wont generate noise, god, there is no lamps or anithing else atached, so forget about it.

what else could it be?

I think that the problem, like Steve Taylor said, is that it isn´t interpreting the correct start / stop signals. Can someone please give me some help here. Does anyone have any working routine for DMX???

Gabriel