HRT DVS-2A Manual de usuario
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© Co
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1163 Warner Ave Tustin, CA 92780, Ph: (714)641-6607, Fax -6698
Model DVS-2A
2-Port DVI Switch with Audio, Serial Control &
Long Cable Equalization
UMA1127
Rev B
2-Port DVI Switch with Audio & Serial Control
1
Trademarks Used In this Manual
Hall Research, HRT, and (logo) are trademarks of Hall Research
Technologies, Inc. Any other trademarks mentioned in this manual are
acknowledged to be the property of the trademark owners.
Federal Communications Commission Statement
This equipment generates, uses and radiates radio frequency energy and,
if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. This equipment has been
tested and found to comply with the limits for a Class A computing
device, pursuant to Part 15 of the FCC rules. These limits are designed to
provide reasonable protection against harmful interference when operated
in a commercial environment. Operation of this equipment in a residential
area may cause interference, in which case the user, at their own expense,
will be required to take whatever measures are necessary to correct the
interference.
European Union Declaration of Conformity
This product has been tested and shown to comply with the
requirements of the European EMC directive 89/336/EEC.
2-Port DVI Switch with Audio & Serial Control
2
Table of Contents
1.0 General ................................................................................................ 3
2.0 Features................................................................................................ 4
3.0 Installation ........................................................................................... 5
. Required Cables..................................................................................... 5
. Inputs & Outputs ................................................................................... 5
. Connecting the DVS-2A........................................................................ 5
. Connection Diagram.............................................................................. 6
4.0 Operation ............................................................................................. 7
. Switched Output .................................................................................... 7
. Modes of Operation ............................................................................... 7
. Priority Selection in Auto Mode............................................................ 8
. Long Cable Equalization ....................................................................... 8
. RS-232 Control Port Usage ................................................................... 8
. To configure HyperTerminal................................................................. 9
. Serial Port Control Codes .................................................................... 10
5.0 Troubleshooting................................................................................. 14
6.0 Specifications..................................................................................... 15
2-Port DVI Switch with Audio & Serial Control
3
1.0 General
Thank you for purchasing Hall Research Technologies’ DVS-2A 2-Port
DVI Switch with Audio & Serial Control.
This unit provides both a video and audio output that can be switched
between two video and audio sources. This allows routing of multiple
DVI equipped devices (such as PC’s) to a single DVI display (such as a
plasma or LCD screen). The switcher supports single-link, DVI-D video
signalsat resolutions up to 1920x1200 and HDTV up to 1080p.
The DVS-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 signal detection).
This unit can be controlled by either manually using the front panel
switch, automatically based on video detection, or remotely through an
RS232 serial port.
The unit can be configured to operate in two different modes: Auto and
Manual.
There is a priority selection that can be set for the ‘Input 1’ DVI
connector. The switched output can be blanked and un-blanked either
from the front panel button or from a command sent from a PC to the
serial port.
The unit also has EEPROM (internal non-volatile flash memory) to store
the last operating mode when power is off.
2-Port DVI Switch with Audio & Serial Control
4
2.0 Features
9Clear and sharp images at resolutions up to1920x1200 including
HDTV up to 1080p
9Hot pluggable
9Supports the DDC2 standard for all input ports
9HDCP & HDMI 1.3 Compatible
9Allows one video with stereo audio to be switched between two
video and audio sources
9Can be manually controlled by push-button switches, remotely by a
RS232 communication port
9Provides an Auto mode to automatically select input source
9Auto Mode priority can be set for input #1 or no-priority
9Switched output can be blanked and un-blanked
9Video Cable Equalization available for long cabling
9Stores the last selection and mode in EEPROM
9Compatible with the Universal Mounting Bracket
9Ships with universal (100~240 VAC) power supply
9Compact, Rugged, Reliable, and Economical
9Made in USA
2-Port DVI Switch with Audio & Serial Control
5
3.0 Installation
. Required Cables
The video input cables are generally DVI male to male (customer
furnished). The Audio inputs are 3.5 mm mini-stereo (customer
furnished). To connect to the unit to a Serial port (such as PC’s COM1)
you would need a Male/Female DB9 Serial Cable (customer furnished).
All of these items are available for purchase upon request.
. Inputs & Outputs
The DVS-2A has 2 video and audio inputs labeled ‘Input 1’ and ‘Input 2’.
The unit has 1 video and audio output labeled ‘Output’.
. Connecting the DVS-2A
Connect your video and audio sources such as computer or notebook PC
to ‘Input 1’ and ‘Input 2’.
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 DVS-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
DVS-2A.
The device can be mounted via a Universal Mounting Bracket (sold
separately) if desired.
2-Port DVI Switch with Audio & Serial Control
6
. Connection Diagram
MODEL DVS-2A REAR PANEL
Universal Mounting Bracket
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.
2-Port DVI Switch with Audio & Serial Control
8
. 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 Auto mode. If INP 1 priority is
selected, the DVS-2A will automatically select ‘Input 1' whenever it
detects the presence of video at ‘Input 1’ connector, regardless of what is
happening at the ‘Input 2’ connector.
For example, if the ‘Output’ is playing the video & audio from ‘Input 2’
and video from ‘Input 1’ is detected, the output of the DVS-2A will
change to select ‘Input 1’ video immediately. With priority set to none,
the unit stays selected to the current input as long as it is detecting video
there.
. Long Cable Equalization
The use of long DVI cables can cause the ‘Video’ image to degrade to
unacceptable levels.
By pressing and holding BOTH the ‘Mode SELECT’ and ‘Priority
SELECT’ buttons for 3 seconds, the video boost circuit will be enabled
and the LED’s will flash momentarily acknowledging the selection was
changed. Both of the GREEN LED’s flash when the BOOST is enabled
and the RED LED’s flash when the BOOST is disabled.
. RS-232 Control Port Usage
The DVS-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 the 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).
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