AKG CSX-IRT3 10-Channel Infrared Distance TransmitterThe CSX IRT3 10 Channel Infrared Distance Transmitter from AKG transmits up to ten language channels with a light angle of 17 to cover the distances of up to 213'. Using PPM (Pulse Phase Modulation) technology, all LEDs cover the same area and distance, regardless the number of channels needed in an application. Hence, exact coverage is ensured even if channel needs change. The CSX IRT3 can be cascaded almost without limit, due to a signal refresher