Click the Start button on Windows, search for "Blackmagic Video Setup", and run the application
Blackmagic Desktop Video Setup Application
Select the DeckLink 8K Pro from the device list in the Blackmagic Desktop Video Setup application, then click the Settings button as shown in the image above
Connector Mapping
Click the Connectors tab, and select SDI 1 In or Out option from the Connector dropdown menu, as illustrated above