To Set Up a GPI Output
A GPI output can be set as a Normal GPI output, or as a Tally output. As a tally output, the GPI output must be assigned to a video source. A GPI output in tally mode can still be used as a normal GPI output.
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               Click Navigation Menu > Configuration > GPIO.
            
            The page lists all the GPIs on the switcher and how they are currently configured. 
- Click Edit for the GPI that you want to configure as an output.
- Click GPO.
- Click a Trigger button to select whether you want to use an edge trigger (Edge), or a level trigger (Level).
- Click a Level button to select whether you want the GPI to trigger low (Low), or high (High) trigger.
- For edge triggers, use the Duration slider to set the length of time (in frames) that the GPI edge output remains triggered.
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               For level triggers, click a Mode button to select how you want to GPI
                  output to act.
            
            - Normal — when assigned to a video source and RollClip is active, will trigger with the source going on-air, and back with the source going off-air (pre-delay values are only used when the source is going on-air)
- Tally — when assigned to a video source, will trigger with the source going on-air, and back with the source going off-air (RollClip and pre-delay values are ignored)
 
