To use your BlackMagic device with Proclaim, you may need to do some set up on your computer.
1. Plug your device into a computer using a Thunderbolt connection, or make sure your expansion card is installed into a PCIe slot on your computer.
2. Download the Desktop Video software from the BlackMagic support site. Scroll down to find the installer on the left-hand side of the page and download the latest version. You may need to restart your computer to complete the install.
3. Open Proclaim, then go to Settings > Display and scroll down to Outputs. Create a new output and select SDI.
Note: If you get a warning, your computer may be blocking the BlackMagic device. Check your computer's Security settings and make sure the computer is allowed to connect to the device.