Is the sat receiver set to PAL at 50 fps instead of NTSC at 60 fps?
If you have a modern LCD hi def receiver, it'll probably lock to the picture out of the sat receiver, regardless of mode.
At least my LCD shows a stable picture regardless which mode I put my sat receiver in.
Did the receiver work properly before?
What has happened to it recently?
Gee, there sure seem to be a lot of 600 questions on the forum lately.
Does somebody have a going-out-of-business-sale on them?
If cheap, maybe I should get one.
I have the cw600s (non-premium), and when it first turns on the vertical roll too, but it goes away after about 2 seconds. I had just assumed that it was a PAL/NTSC thing that set itself automatically.