VP400 Series Video Pro Form7343A Operation Manual
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Appendix B – Calibrating TV User Controls
The improved quality of today’s large screen TVs presents a challenge to the installation
technician. Even the slightest mis-adjustment of the TV user controls can cause the picture
quality to be significantly less than it could be. This section describes how to properly adjust the
five major user controls, using the Sencore VP400 Family Multimedia RF-Video Generators,
which provide the patterns needed for user control calibration, as well as for white balance
calibration and picture geometry adjustment. The important TV user controls are (commonly
used label listed first; more accurate technical term in parentheses):
1. Brightness (Black Level)
2. Contrast/Picture (White Level)
3. Sharpness
4. Tint (Chroma Hue)
5. Color (Chroma Saturation)
Brightness Control
The brightness control adjusts the light level of the darkest portions of a picture - that’s why this
control is more accurately called the black level control. When the black level is set too dark, the
subtle dark gray details of a scene are lost to black. When the black level is set too bright, the
darkest grays and deep blacks in the picture are all a lighter gray, which effectively lowers the
contrast ratio of the display, reducing picture quality.
The VideoPro Series Pluge pattern, shown below, provides a unique black level alignment signal
that was designed for easily adjusting the brightness control for proper black level.
Note: The environment surrounding a TV affects the proper setting of the user controls. Room
lighting should be adjusted to the preferred level for movie viewing before the TV is calibrated.
NTSC
7.5 /3.5 IRE
7.5 IRE
10 IRE
7.5 IRE
HDTV
0 /- 4 IRE
0 IRE
10 IRE
0 IRE
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