This is a great multiformat transcoding signal converter that supports DV/SDI. It comes without a power supply. Please note, one rubber foot is missing.

To use this Laird Inertia LTM - 6000C Transcoding Signal Converter, first connect it to your device that supports DV/SDI. Since it doesn't come with a power supply, you'll need to use a compatible one. When setting it up, make sure to handle it gently as one rubber foot is missing. For maintenance, keep it in a dry and clean place. Wipe it with a soft cloth regularly to keep it clean. Avoid exposing it to extreme temperatures or humidity. If you encounter any problems, check the connections first and make sure the power supply is working properly.