To use this product, first, make sure the power supply (PS-8300) is properly connected. Then, install the HDC-8222 HD down converters and distribution amplifiers into the 2RU module frame. When in use, keep the device in a well - ventilated area to avoid overheating. For maintenance, regularly check the connections of the power supply and cards. If you encounter any issues, disconnect the power supply first and then check the components.