The OMX-HDMI-COAX HDMI extender converts HDMI signals to HD digital TV signals using DVB-T CATV transmission mode. Unlike traditional analog CATV signal, this extender uses 64 QAM mode to convert the signal and transmits via coaxial cables for long distances. Using a CATV splitter, you can easily create a one to multiple or a multiple to multiple matrix. Short cable runs may require an attenuator, please refer to product manual for specifics. Excellent image quality, high interference resistance, and many available channels, make it ideal for total home CCTV, digital signage, shopping mall advertising, and digital KVM.