ATEM Camera Converter from Blackmagic Design gives you the extension of the SDI (serial digital interface)/HDMI cameras to the distance, up to 28 miles (45km) via the optical fiber link. By using this unit, you can connect the camera to the SDI/HDMI input for converting SDI video signals to Optical signals. For the purpose of the monitoring function, you can use the optical fiber input and connect it to the switcher program feed for converting SDI/HDMI output. Additionally, the available SDI/HDMI outputs can be switched between return program and camera input for the same function.