I have a samsung PN50A650T1FXZA and my xbox 360 is hooked up to it via hdmi. I have calibrated it with the 360 settings at rgb and reference at standard with ingame patterns but the deepest blacks look gray. How should i configure my 360 settings to do correct calibration on in game test patterns. One way i heard was to keep it on rgb and standard and change black level to low on the tv itself. I need help with this please.