Ok PlasmaPZ80U, of course, again, you are right but i have a low-end model (UE40C5100), and to make a good callibration, i need to acces the Service Menu, knowing what i'm doing of course. For example my default colour space it's very basic ("HUESAT") and to callibrate the color correctly i need to change it to "RGB TYPE" (to get control with RGB-CMYK). Another thing that brings me a lot of picture quality it's the ADC Callibration that i have said (using a 16-235 pattern) to get better colors and contrast for movies and respecting the space for 0-255 to play games or tu use a computer. I think that this control (ADC Callibration and ADC Reuslt) it's very useful (in low-end models especially), my low-end tv by default it's configured with an ADC RESULT with subcontrast 132 and 50 to RGB Gains (as if the manufacturer had used a 0-255 pattern to callibrate it), on the contrary in the Service Menu's high end Samsung Tvs i've seen the ADC RESULT has been realized using a 16-235 pattern with sucontrast at 134 or less and RGB Gains with 68 or more, This ADC RESULT gives them a little more resolution (almost imperceptible) and better color quality.
Please, believe me, i'm not here to make changes to my tv to get things for nothing like pvr or, in my opinion, bad "enhacements" like "dynamic mega contrast boost" or something like that, i'm here to learn from the best,
My question it's why the ADC varies with a target Delta 2 (or even 1) when i change in one point the subcontrast or the gains or at least if someone could tell me if it's normal.