Using this AJA HD5DA 1x4 HD/SD - SDI distribution amplifier and repeater is quite simple. First, make sure you have your own power supply to connect it. Then, connect your HD or SD - SDI source to the input of the amplifier. After that, you can connect up to four devices to the outputs for signal distribution. When using, always check that the power supply voltage matches the device's requirements. For maintenance, keep it in a clean and dry place. Avoid exposing it to extreme temperatures or humidity. Regularly check the connections to ensure there are no loose cables.