I recently had a HD antenna installed in my attic to receive OTA HD signals. I notice that when I watch Jay Leno broadcasted from NBC High def, when the camera pans around, I could see pixelization as if the image was breaking up. This also happens with flashing lights. Another things I noticed is that when I am watching a HD program and a person in the picture has a finely striped shirt or tie, the lines seem to be moving rapidly. Can someone tell me if there is problem with my signal reception, monitor or my set top box?