The problem was the antenna, he didn't reboot after disconnecting him. Other cable and the reboot problem is solved! Great! Thank you all!

But just 2 channels freezes (scrambled)... the work and scramble for a second or 2/3 and then they work again for a minute of 5 and scramble again. It is just TNT (german) and 13th street (german) the other channels don't do that. How is that possible or to solve?