The DigitaLinx DL-AS21C is a super - handy compact multi - format video switcher. It can support video resolutions all the way up to UHD (4096x2160). With one HDMI input and one VGA input featuring stereo audio, it can switch either input to a single HDMI output, whether automatically or manually. The DL-AS21C has multiple control methods. In Auto mode, it will quickly switch to the newest source device. And if multiple sources are active at the same time, VGA takes priority. You can also control it manually through the front panel, RS232, or contact closure. As a great extra, it has a built - in CEC controller. This controller can power on/off the connected display according to the source device's status. Key features include: HDMI supports 1080p, 3D, 4K video and 2.0/5.1 audio; VGA supports up to 1920x1200 with audio embedding; it has built - in EDID settings and EDID pass - through; HDMI output can control the display via CEC; and it offers manual, RS232, contact closure, and automatic switching options.

Using the DigitaLinx DL - AS21C is easy. First, connect your HDMI and VGA source devices to the corresponding inputs, and then connect the HDMI output to your display. If you want automatic switching, set it to Auto mode. The switcher will then detect the newest source device and switch to it. Remember, if multiple sources are working at once, VGA will be prioritized. For manual control, you can use the front panel buttons, RS232 connection, or contact closure. When it comes to the CEC controller, it will power your display on or off based on the source device's status. Just make sure your devices support CEC for this feature to work. As for maintenance, keep the switcher in a dry and cool place. Avoid exposing it to dust and moisture. If you're not using it for a long time, unplug it from the power source. And that's all you need to know to make the most of your DigitaLinx DL - AS21C switcher.