Hall Research VS-2A User Manual
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Model VS-2A
2-Port VGA Switch with Audio & Serial
Control
© Co
1163 Warner Ave Tustin, CA 92780, Ph: (714)641-6607, Fax -6698
right Hall Research, Inc. All rights reserved.
UMA1119 Rev B
Model VS-2A
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Table of Contents
2-Port VGA Switch with Audio & Serial Control
1.0 General ................................................................................................ 2
2.0 Features................................................................................................ 2
3.0 Installation ........................................................................................... 3
. Required Cables..................................................................................... 3
. Inputs & Outputs ................................................................................... 3
. Connecting the VS-2A........................................................................... 3
. Connection Diagram.............................................................................. 4
4.0 Operation ............................................................................................. 4
. Switched Output .................................................................................... 4
. Modes of Operation ............................................................................... 5
. Front Panel Lockout .............................................................................. 5
. Priority Selection in Auto Mode............................................................ 5
. RS-232 Control...................................................................................... 6
. To configure HyperTerminal................................................................. 6
Control Codes (1 byte commands from external control device).............. 7
5.0 Troubleshooting................................................................................. 10
6.0 Specifications..................................................................................... 11
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Model VS-2A
1.0 General
Thank you for purchasing the Hall Research Model VS-2A 2-Port VGA
Switch with Audio & Serial Control.
This unit provides a video along with audio output that can be switched
between two video and audio sources. The unit also has a loop-out for PC
#1 Input for connection to a local LCD.
The VS-2A unit provides all the A/V and control connections on the rear
panel; the front panel has a push-button switch with corresponding LED
indicator for the selection of video source. The front panel also features
mode selection buttons to allow the unit to operate automatically (based
on video sync detection). This unit can be controlled either manually
using the front panel switch, automatically based on video sync detection,
or remotely through an RS232 serial port.
The unit can be configured to operate in two different modes, which are
Auto and Manual modes. There is a priority selection that can be used to
set for none, Input #1 or Input #2. Switched output can be blanked and
un-blanked either from the front panel button or from the PC command
sending through the serial port.
The unit also has EEPROM (internal non-volatile flash memory) to store
the last operating mode when power is off.
2.0 Features
9 Allows one video with stereo audio to be switched between two
video and audio sources
9 Loop-out for input #1 audio and video
9 Can be manually controlled by push-button switch buttons or
remotely by RS232 communication port
9 Provides Auto mode to automatically select input source
9 Auto Mode priority can be set for input #1, input #2 or no-priority
9 Switched output can be blanked and un-blanked
9 Stores the last selection and mode in EEPROM
9 Compact, Rugged, Reliable, and Economical
9 Made in USA
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2-Port VGA Switch with Audio & Serial Control
3.0 Installation
. Required Cables
The video input cables are generally HD15 (VGA) male to male
(customer furnished). The Audio inputs are 3.5 mm mini-stereo (also
customer furnished). If you are going to connect the unit to a Serial port
(such as PC’s COM) you would need a Male/Female DB9 Serial Cable.
. Inputs & Outputs
The VS-2A has 2 video and audio inputs: PC 1 Input and PC 2 Input.
The unit has 1 video and audio output: SW Output. There is a local video
and audio output, which is a loop-out for PC 1 Input: Local.
. Connecting the VS-2A
Connect your video and audio sources such as computer or notebook PC
to PC 1 Input and PC 2 Input. If the loop-out for input #1 is desired, it
can be connected to local video and audio.
Connect the display device such as a monitor (or a video projector) to the
switched video and audio outputs (SW Output).
Connect the included power supply to the VS-2A.
Select the desired mode of operation including the priority for your video
and audio output using the front panel switched buttons. If preferred, the
selection can also be done through RS-232 serial commands by
connecting a DB9 RS-232 Serial cable to your PC and the VS-2A.
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