I just got a receiver. Now I can confirm, that the dish is correctly adjusted. The receiver had no problem finding the channels. Signal was at ~90% and Quality between 70 and 85%
I have a problem with the card. First I adjusted the dish with a Sat-Finder, but when I connected the card it wasn't able to find a signal. I tried in Windows Media Center and also with the TBSViewer but both of them showed no signal. I even switched the card to a different slot but that didn't help...