Using this SDI to HDMI converter is quite easy. First, connect your SDI source to the SDI input of the converter. Then, connect your HDMI - compatible display to the HDMI output. If you want to use analog audio, connect your audio device to the external stereo analog audio input/output. You can select the audio source through the converter's settings. When it comes to power, make sure to use a power supply within the 7V - 17V DC range. As for maintenance, keep the converter in a dry place and avoid exposing it to extreme temperatures. Clean the device with a soft, dry cloth regularly. Don't touch the connectors with dirty hands to prevent damage. Also, when installing multiple units in a rack - mount frame, ensure proper ventilation to avoid overheating.