HRT VS-2A, Руководство пользователя

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5
2-Port VGA Switch with Audio & Serial Control
. Modes of Operation
The unit can operate in either Auto or Manual mode by pressing the mode
button to select it.
In Auto mode, the VS-2A will automatically select the input with active
video and audio. The presence of video is determined by examining the
V. Sync signal of the input connectors. The front panel SELECT button
cannot be used to switch between PC 1 and PC 2 input sources in this
mode. However, it 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 VS-2A will depend on the selection of
the switched output SELECT button.
. Priority Selection in Auto Mode
The priority button is used to select the priority as none or as input #1.
This priority selection only applies to the Auto mode. If INP 1 priority is
selected, the VS-2A will automatically select input #1 whenever it detects
the presence of video at PC 1 input, regardless of what is happening at
input #2. For example, if the output is playing the video & audio from PC
2 input and the video from PC 1 input is detected, the output of the VS-
2A will select PC 1 (input #1) immediately. With priority set to none, the
unit stays selected to the current input as long as it is detecting video
there.
. RS-232 Control
The VS-2A can also be controlled via a serial device. The unit operates at
a baud rate of 4800 bps. From the serial port, you have full control over
the operation of the switched output, mode, and priority buttons.
Note on RS-232 port availability on your PC
Most PCs and notebooks do not have a
serial port. So to program the Switch you
may need a USB to RS-232 Serial
converter. These are available from Hall
Research Technologies (Model USB-
RS232-1).