Hi Fredrik,
Thank you for quick reply. I don't have this kind of tool, but I know that it would be better. However, do you think the signal behaviour is right, even with an oscilliscope? I did the same on another board with the same hardware (CC1101, same passive component on the antenna line) and the signal goes from 0 to 1V very quickly. On top of that, the chip replies with "SEND_SUCCESSFUL" so I guess this is not a software problem.
I also tried with another software that is currently running great on another board and I have the same problem.
Please, give me a clue!
Thanks a lot.
Sébastien