To use this AJA HA5 converter, first connect your HDMI source device to the converter's HDMI input. Then, connect the converter's SD/HD - SDI output to your receiving device. Since it doesn't have a power supply, you'll need to provide your own suitable power source. When handling the converter, avoid exposing it to extreme temperatures or moisture. To maintain it, keep it clean by using a soft, dry cloth to wipe it regularly. If you encounter any issues, make sure all connections are secure and the power supply is working properly.