The Blackmagic Design ATEM Camera Converter enables extension of SDI (serial digital interface) / HDMI cameras to distances up to 28 miles (45km) via an optical fiber link. You can connect your camera to the SDI/HDMI inputs to convert videos to optical signals. This optical fiber input can be connected to the switcher program feed to convert to SDI/HDMI outputs for monitoring. In addition, the SDI/HDMI outputs can be switched between return program and camera input for monitoring.