Originally Posted by Camster
Actually I'll try your 15 setting out too. I'll have to wait until the wife is finished watching hockey though first. It's funny as she is no tv expert but she loves hockey on the Panny.....
I tested again with Chapter 14 of the latest Twilight movie on BR. With AGC set to 0, I get a lot of fluctuation in that scene and like Elwaylite mentioned, there seems to be at least 3 levels of blacks. TV is (often) switching back and forth between those 3 levels during the scene.
AGC set to 1 seems to remove the lower black level leaving only the two higher levels and thus diminishing fluctuation frequency a bit.
With AGC set to 15 I was only able to count one black shift in the same segment where I counted at least 6 with AGC set to 0.
The picture brightness setting also seems to affect FB. In THX mode with brightness set to 50 (my usual setting) I get fluctuation in that same chapter. If I raise brightness up to 58 (or higher), fluctuation completely disappears. Resulting blacks are a bit brighter and look about the same as when I put the LED flashlight in front of the CATS sensor. As a matter of fact, with THX brightness set to 58, with a still picture, in a pitch black room, I get no fluctuation at all when I turn my flashlight on and off in front of the CATS sensor.
So I guess that gives us a fourth option: