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CONNECTION AND INSTALLATION
1. Connect the desired VGA monitor and speaker to the output of the AT-APC21A and two VGA + Audio sources to the
corresponding inputs of the AT-APC21A via VGA and audio cables.
2. The LED display on the switch panel will turn on when the switch detects a VGA signal (Blue: Channel 1, Green: Chan-
nel 2) The External control button is available for manual switching.
3. Please use standard high quality VGA cable to ensure best image quality.
4. Select methods:
A. External control button: Push this button to switch to desired channels. The button will be inactive if only one channel
is activated.
B. Auto switching: The switcher will automatically detect a new input signal and change to that signal. If one of the two
sources is unplugged, the switch will automatically change to the available channel.
www.atlona.com | toll free: 1-877-536-3976
For International: 1-408-962-0515
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