This is the adapter:

Picture was too dark, and lots of strange noises in the picture. After messing around with the settings on my XRGB3, I managed to get the picture somewhat better. but it still looks really bad.
My best result with this RGB device was on my Sony Bravia TV by connecting it directly to the scart input. Looks great... but for some reason the picture is ''jumping'' or something. I made a video to show whats happening.
https://www.youtube.com/watch?v=bQjtmP8Y6OA
What exactly is causing this? and how can this be fixed?
Edit: Works great on my XRGB3 now. Changed the RGB input termination from 75 ohm to 220 ohm.