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Appendix A: Installing the Video Graphics Card
This dialog gives you the option to accept the changes or restore the previous display settings. The display will
return to the previous settings after 15 seconds if you do not select Yes or No.
CAUTION: Always close all video window applications (including Wall Control applications connected locally or
remotely to the system) before performing any operation that modifies the settings of any attached
display. Failure to do so could result in the machine locking up and requiring a reboot.
A.7 Defining Custom Modes
To define custom modes, use the Custom Mode Utilities tool on the Radian Video Wall Processor thumb drive.
You can also download the latest version from the Black Box website: www.blackbox.com
The Custom Modes tool is a utility for defining custom modes that can be generated by the Video Graphics
Card. The custom modes tool must be used on a system where the active display driver supports custom
modes. To generate a custom mode, you must enter the following values into the utility application dialog box:
• X Resolution—The active display width in pixels.
• Y Resolution—The active display height in lines.
• Refresh—The refresh rate displayed in the Display Properties dialog. Also used for calculating the dot-clock if no
value is provided.
• Horizontal Front Porch—The horizontal front porch in pixels.
• Horizontal Sync Width—The H-Sync width in pixels.
• Horizontal Back Porch—The horizontal back porch in pixels.
• Vertical Front Porch - The vertical front porch in lines.
• Vertical Sync Width—The v-sync width in lines.
• Vertical Back Porch—The vertical back porch in lines.
• Horizontal Sync Polarity—0 = negative, 1 = positive.
• Vertical Sync Polarity—0 = negative, 1 = positive.
• Dot Clock (optional)—The pixel dot-clock in KHz. This is calculated from the Refresh rate if not provided.
NOTE: If a new mode is created or an existing one is amended, you must close the Display Properties dialog
and re-open it to ensure the new values are refreshed in the display driver.
A.8 Screen Order
Connecting Screens
The first card to be initialized generates the picture for the top left monitor in the wall of screens, plus the three
adjacent screens. The second card drives the next four screens and so on. This sounds simple, but can be con-
fusing when trying to determine how to assign monitor video cables to the Video Graphics Card outputs.
Changing the Order of the Screens
To change the order in which the screens appear, use the Wall Control application.
Select Screen Order from the Wall Control Configure menu and in the displayed dialog, click on the screens
sequentially to establish the order you want.
NOTE: The new screen order will not be applied until the Wall Control server is re-booted.
