Just to add to what Snooker14 says; These discs are just to get you in the door. Many/most all tvs come so far out of wack;there is no way you can get close to isf standard. Me; I could take your remote and get 90percent of what these discs do.(without the disc) The convergence/ grey scale and color temp require you get into the the "service" menu for proper adjustments. I have one of these discs. If you are used to looking at a properly calibrated set;nothing else will do.