Hall Research DVS-2A - Manual (Page 9)

2-Port DVI Switch with Audio & Serial Control
7
4.0 Operation
. Switched Output
The switched output SELECT button is used to select between video &
audio input sources of PC 1 and PC 2. A solid-on LED is used to indicate
which input is selected.
Holding down the switched output SELECT button for 3 seconds will
blank the current selected input source (and mute the audio output). The
LED for the current selected input will start blinking to indicate the
blanking mode. Pressing the switched output SELECT button again will
un-blank the output and un-mute the audio on the switched out rear
connector.
MODEL DVS-2A FRONT PANEL
. Modes of Operation
The unit can operate in either Auto or Manual mode by pressing the mode
button.
In Auto mode, the DVS-2A will automatically select the input with active
video and audio. The presence of video is determined by examining the
V. Sync signal or optionally the +5 VDC signal from DVI input
connectors. The front panel switched output SELECT button cannot be
used to switch between ‘Input 1’ and ‘Input 2’ sources in this mode.
However, the switched output SELECT button can be used to blank the
output by holding it down for 3 seconds or to un-blank the output by
pressing it once.
In Manual mode, the output of the DVS-2A will depend on the selection
of the ‘Switched Output’ SELECT button.