Input Balance; Introduction To Input Balance - Barco HDQ 2K40 User Manual

Image 10-27
Image settings, color temperature
2. Press ENTER to select.
3. Use the ▲ or ▼ key to select Custom Balance. Press ENTER to accept.
Image 10-28
Custom color temperature
4. Select Gain Red and press ENTER. Use the ◄ or ► key to adjust the red gain.
Select Gain Blue and press ENTER. Adjust the blue gain in the same way as the red gain using the ◄ or ► key.
5. When finished, press EXIT to return.

10.3.7 Input Balance

10.3.7.1 Introduction to Input Balance

Introduction: Unbalanced color signals
When transporting signals, there is always a risk of deterioration of the information contained in the signals.
In case of information contained in the amplitude of the signals which is the case of data color signals (R, G, B),image 10-29 , we
are quite sure that the amplitude of these color signals is subject to alterations.
An example of alteration may be a DC component added to the signal, in the form of a DC offset repositioning the black level, since
this black level ("brightness") will become crucial later on (clamping circuit) it will result in "black not being black".
Another value that is subject to alteration is the amplitude of the signal, resulting in an altered "Gain" of the signal ("white level" or
contrast).
The alterations of the three color signals will happen independently i.e. the colors will end to be unbalanced, image 10-30
B
Image 10-29
R5905303 HDQ 2K40 02/03/2015
0.7V
Black level
10. Image
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