My apologies for the delayed reply, I completely missed seeing the replies here on page 4.
Ok so I am feeding in composite video from a DVD player into my RF converter. The feed is from a DVD titled TV Test Card/Video Pattern Generator DV. I have the green and blue screens turned down and am using the all red signal from the DVD player, note the video has a black + in the center and white arrows on each side.
See below for the results. I would say it is a bit better than I had before but I can not get the image centered nor does it completely fill the screen. If I try to center the image I can not get to an all red purity.
Note I can move the image over via the horizontal hold but then when I restart the TV the horizontal hold is lost and I have to bring it back to off center.
Let me know what you think, also if more pictures or a video would be helpful.