Barco Hdx Series Installation Manual

9. Image
9.3.7 Input Balance
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9.3.7.1 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 9-28 , 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...

9. Image
Black level setting : brightness
White level setting : contrast
The same absolute black and white level for the three colors allows the same reference for Brightness and Contrast control of the
picture !
These two references also set the range in which the ADC will work for that particular source (this explains also why each input
balance setting is linked to a particular source and thus saved in the imagefile).
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9.3.7.2 Adjusting the input balance
How can it be done ?
To balance the three color signals of a particular source there are conditions; in fact we must know the black and the white level of
the source i.e. :
1. The source in question must be able to generate a white signal, ideally a 100% white (background) full screen pattern
2. The source in question must be able to generate a black signal, ideally a 100% black (background) full screen pattern
AB
Image 9-31
White balance : In the projector,...

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Image 9-35
Image settings, input balance
Image 9-36
2. PressENTERto select.
3. Do you want to use an internally generated test pattern ?
If yes, use the▲or▼key to selectAdjustment Patternand pressENTERto toggle between [on] and [off]
If no, adjust on the selected source.
4. Use the▲or▼key to selectRedbelowBlack balanceand pressENTER.
5. Adjust the red black level on a minimal value
6. Use the▲or▼key to selectBlack balance blueand adjust the blue black level on a minimal value.
Note:This minimal...

9. Image
Image 9-39
Image settings, input balance
Image 9-40
Input balance, white balance
3. PressENTERto select.
4. Do you want to use an internally generated test pattern ?
If yes, use the▲or▼key to selectAdjustment Patternand pressENTERto toggle between [on] and [off]
If no, select a white pattern (or gray scale as alternative).
5. Use the▲or▼key to selectWhite balance red.
6. Adjust the red white level (gain) on a minimal value
7. Use the▲or▼key to selectWhite balance blueand adjust the blue white...

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9.4 Aspect Ratio
Aspect ratio
Relation between the horizontal & vertical dimension in which the window will be displayed, e.g. 4 by 3 or 16 by 9.
Can also be expressed as a decimal number, such as 1.77. The larger the ratio or decimal, the wider the image (or
the less the image is squared).
What can be done?
The aspect ratio setting forces the projector to project an image using a defined aspect ratio.
Aspect ratio Description
4:3
Standard television format
16:9
Wide screen television format /...

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Image 9-44
Aspect ratio
4. PressENTERto activate.
How to set up the custom aspect ratio
1. While Custom is selected, use the▲or▼key to selectSetup Customand pressENTER.
Image 9-45
Custom aspect ratio
Image 9-46
Custom aspect ratio adjustment
The custom aspect ratio setup menu opens.
2. Use the▲or▼key to adjust the vertical size (height) of the image.
Use the◄or►key to adjust the horizontal size (width) of the image.
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9.5 Timings
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9.5.1 Source timings
Adjustable items
• Horizontal start in pixels : number of pixels between the horizontal sync and active video information in the input signal.
• Horizontal Active = Active horizontal pixels (width) : number ofactive pixels in the input signal. This value is normally given in
the source specifications. If not, adjust until full image is displayed (no missing pixels).
• Vertical start in lines : number of lines between the vertical sync signal and active video information in...