Hi Robert,
Can I check if this is an Ultrix Acuity switcher?
If yes, create a new CC. Press Insert Event > More > More > GPO/Tally. Then you probably want the GPO Toggle or GPO Trigger option.
https://help.rossvideo.com/ultrix-acuity/Topics/Operation/CustomControls/Special-GPI.html
Hope this helps.
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Aaron
Business Development Manager - Production Switchers & Servers
Ross Video
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