To use this AJA HI5 converter, first connect it to a power source using the provided power supply. Then, connect your HD/SD - SDI device to the converter's input, and your HDMI - compatible device to the output. That's it, you're ready to enjoy high - quality video and audio conversion. When using, make sure the connections are secure. For maintenance, keep it in a dry and cool place. Avoid exposing it to direct sunlight or extreme temperatures. If there are any issues, check the power supply and connections first.