I grabbed a KV-27FS120 TV and a Audio Authority 9A60 transcoder for a Radeon HD 4870 running CRT_Emudriver. When trying to output any resolution (240p, 480i included), my picture is distorted at the top:

I got a replacement sent, but the replacement is doing the same thing. Does anyone have any experience dealing with this issue? I tried two power bricks, one center negative, one center positive with the same results.