What is the native resolution of the 310? what are the frequency limits of the 310 on rgbhv bnc's? and/or the needed front and back porch settings? and sync width? the best i get when i try various resolutions are is two copies of the picture displayed side by side, but it is unstable and sometimes loses sync altogether so i imagine im pushing the limits on the freq? ive tried 640/480-720/576-800/600-1024/768 with no luck.