Using this device is a breeze. First, connect your SDI or HDMI cables to the appropriate input and output ports according to your needs. Turn on the device, and you can start checking the signal status on the 5 - inch touch screen. To generate test patterns, just select the type you want from the menu. When it comes to audio monitoring, plug in your earphones to the designated output. As for maintenance, keep the device in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If there are any issues with the cables, make sure to check for proper connections. And don't forget to update the device's software regularly to ensure optimal performance.