1:1 Pixel Matching is required to ensure that a video signal that is identical to a display's native resolution is delivered to the display on a matching, pixel-by-pixel basis, without extraneous processing or scaling that could introduce visible artifacts.
Color Isolation Controls are required to evaluate the accuracy of a display's conversion of non-RGB signals to RGB, and to correct any conversion errors via the display's color decoder controls. Where physical isolation isn't possible, an electronic means is needed in order to view each color channel separately.
Discrete Source Controls refer to a system architecture that allows a display to be independently adjusted for more than one signal type or video source, and to have the resulting settings for each signal or source type stored separately and then applied correctly to the active video source or signal type.
Grayscale Controls are required to allow adjustment of the levels of red, green and blue light that collectively produce the shades of gray that range from video black to reference white.
Grayscale is also sometimes referred to as Color Temperature or White Balance, and while these three terms are not completely interchangeable, they all relate to how a television produces the "color of white" from a mixture of the red, green and blue primary color components.
Certified Calibration Configuration, aka "3C," is an ISF-designed calibration system that manufacturers may incorporate into the design of their displays as a means of providing managed access to the controls needed for display calibration, including discrete controls for multiple sources and/or signal types and the ability to customize each source/signal type for day or night ambient lighting conditions.
Lens Shift Control allows a fixed-pixel front projector to mechanically reposition the lens in relation to the screen. Lens shift is indispensable in situations in which the projector cannot be mounted within the ideal range as specified by the manufacturer.
Y/C Delay Controls are required to minimize or correct artifacts that occur when the luminance (black & white) channel and/or one or more color channels in a video signal are not properly synchronized.