B&K Precision 1253 - Manual - Manual (Page 32)

6. Color Saturation & Hue Calibration
HDTV displays with YPbPr component video inputs include a Color saturation control. This changes the amplitude
of the Pb and Pr (color-difference) signals with respect to the Y (luminance) signal, which affects the sensation of
color depth or vividness of color. Deep colors are highly saturated and pastel colors, or shades of white, have
minimum color saturation. A few displays may also provide a Hue control that adjusts the shade of the colors. It is
critical to have color saturation and hue properly calibrated to achieve accurate picture color.
BK-1253 Color Saturation & Hue Calibration Patterns:
The BK-1253 provides 75% SMPTE Bars and Color Bars to visually adjust color saturation and hue. The Color Flat
Fields can be used to adjust color saturation and hue, or to measure color accuracy using a color analyzer.
Color Saturation Adjustment Procedure:
The SMPTE color bars are used to adjust color saturation and hue. Use blue, red, and green filters to view one
color component of the pattern at a time. Many displays allow only a single red, green or blue CRT beam to be
individually turned on, which is easier and more accurate than using filters. Adjust the Color saturation (and Hue)
control while viewing only one primary color at a time. When viewing using the blue primary only, the white, blue,
cyan, and magenta colors will form four vertical blue bars that should be the same intensity from the top to the
bottom of the display. When viewing with the red filter or CRT beam, the red, white, yellow and magenta colors
should all appear as the same intensity of red. And when viewing with the green filter or green CRT beam, the
green, white, yellow and cyan colors should appear to be the same intensity of green.