Ross openGear GPI-8941 Series, User Manual

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GPI-8941 Series User Guide (v9.0) Basic Configuration • 39
3. Select a reference source from the Reference Input menu.
The Reference Type status field on the Config tab updates when a valid reference signal is detected.
Setting up the Vertical Reference Timing Window
The vertical reference is used to synchronize an output change timing window. Once you have selected the
reference source, use the Timing Window options in DashBoard to specify the start and end of the timing window.
You can use a specific video format to define the Start and Stop Lines, or use the Proportional Enable option to
affect all reference types as the same time (regardless of the video format). For example, setting the window to run
from 16% (Start Line) to 89% (Stop Line) will give a 1080p signal a window that starts on line 173 and ends on line
961 whereas a 480p window starts on line 76 and ends on line 432.
Keep the following in mind before setting up the vertical reference timing for your card:
• Outputs that are configured to use the vertical reference will only change during the output change timing
window.
• Output changes received outside the window will wait for the start of the next window.
• Outputs that are not configured to use the vertical reference will change immediately.
To set up the timing window using specific lines for a format
1. From the Tree View , select the node for the GPI-8941 card you want to configure.
2. Select the Config tab.
3. Locate the Timing Window Setup area of the tab.
4. Locate the video format for the reference signal in the Type list.
5. Use the Start Line field to specify the line in the video signal that marks the start of the timing window.