HRT DVS-4A Bedienungsanleitung
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© Co
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1163 Warner Ave Tustin, CA 92780, Ph: (714)641-6607, Fax -6698
Model DVS-4A
4-Port DVI Switch with Audio, Serial Control &
Long Cable Equalization
UMA1129
Rev B
4-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.
4-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-4A........................................................................ 5
. Connection Diagram.............................................................................. 6
4.0 Operation ............................................................................................. 7
. Manually Switched Output .................................................................... 7
. Modes of Operation ............................................................................... 7
. Priority Selection in Auto Mode............................................................ 8
. Long Cable Equalization ....................................................................... 8
. Scan Mode ............................................................................................. 8
. RS-232 Control Port Usage ................................................................... 9
. To configure HyperTerminal................................................................. 9
. Serial Port Control Codes .................................................................... 10
5.0 Troubleshooting................................................................................. 16
6.0 Specifications..................................................................................... 17
4-Port DVI Switch with Audio & Serial Control
3
1.0 General
Thank you for purchasing Hall Research Technologies’ DVS-4A 4-Port
DVI Switch with Audio & Serial Control.
This unit provides both a video and audio output that can be switched
between four 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-4A 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.
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 three different modes, which are
the Auto, Scan and Manual modes.
The unit also has EEPROM (internal non-volatile flash memory) to store
the last operating mode when power is off.
4-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 four
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 any input or no-priority
9Scan Mode shows each output for a programmable time period
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
4-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-4A has 4 video and audio inputs labeled ‘Video 1’ through
‘Video 4’. The unit has 1 video and audio output labeled ‘Video Output’.
. Connecting the DVS-4A
Connect your video and audio sources such as computer or notebook PC
to ‘Video 1’, ‘Video 2’, ‘Video 3’ and/or ‘Video 4’ connector(s).
Connect the display device such as a monitor (or a video projector) to the
switched video and audio output connectors.
Connect the included power supply to the DVS-4A.
Select the desired mode of operation (Auto, Scan or Manual) using the
front panel switched buttons. (Auto = SEL 1 & SEL 2, Scan = SEL 3 &
SEL 4)
If preferred, the above selections (and more) can also be done through
RS-232 serial commands by connecting a DB9 RS-232 Serial cable to
your PC and the DVS-4A.
The device can be mounted via a Universal Mounting Bracket (sold
separately) if desired.
4-Port DVI Switch with Audio & Serial Control
6
. Connection Diagram
MODEL DVS-4A REAR PANEL
Universal Mounting Bracket
4-Port DVI Switch with Audio & Serial Control
7
4.0 Operation
. Manually Switched Output
The SEL1 through SEL 4 buttons are used to select between video &
audio input sources of Video 1 through Video 4. A solid-on LED is used
to indicate which input is selected.
Holding down any of the SEL buttons for 3 seconds will blank that
selected input source (and mute the audio output). The LED for that
selected input will start blinking to indicate the blanking mode. Pressing
that SEL button again will un-blank the output and un-mute the audio on
the Video Output rear connector.
MODEL DVS-4A FRONT PANEL
. Modes of Operation
The unit can operate in either Auto or Manual mode. Pressing the SEL 1
and SEL 2 buttons simultaneously for 3 seconds will select AUTO mode.
Pressing any SEL button selects MANUAL mode.
When in Auto mode, the SEL 1 and SEL 2 LEDs will flash to indicate the
mode is active.
In Auto mode, the DVS-4A 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 SEL buttons cannot be used to switch
between ‘Video 1’ through ‘Video 4’ sources in this mode. Pressing any
of the SEL buttons will take the unit out of AUTO mode.
In Manual mode, the output of the DVS-4A will depend on the selection
of the SEL buttons.
4-Port DVI Switch with Audio & Serial Control
8
. Priority Selection in Auto Mode
The priority of the Video 1 through Video 4 inputs can only be selected
by a command through the RS232 port.
This priority selection only applies to Auto mode. If a video priority is
selected, the DVS-4A will automatically select that ‘Video' input
whenever it detects the presence of a video signal at that ‘Video’
connector, regardless of what is happening at the other ‘Video’
connectors. A priority value can be set for all four ‘Video’ input
connectors.
For example, the priority has been set for ‘Video 2’, ‘Video 4’, ‘Video 1’
and then ‘Video 3’. If the ‘Output’ is playing the video & audio from
‘Video 3’ and video from ‘Video 1’ is detected, the output of the DVS-4A
will change to select ‘Video 1’ video immediately. Video detection on
either ‘Video 2’ or ‘Video 4’ would take precedence over the ‘Video 3’
signal.
. Long Cable Equalization
The use of long DVI cables can cause the ‘Video’ image to degrade to
unacceptable levels. Enabling the ‘BOOST’ signal, can sometimes
compensate for the cable length and produce an acceptable picture.
The ‘BOOST’ setting can only be selected by a command through the
RS232 port.
. Scan Mode
The unit can operate in Scan Mode by pressing the SEL 3 and SEL 4
buttons simultaneously for 3 seconds.
When in Scan mode, the SEL 3 and SEL 4 LEDs will flash to indicate the
mode is active.
In scanning mode, the unit will display each of the video and audio input
signals for a pre-determined time period from 1 to 60 seconds.
The unit can also be programmed (via the RS232 port) to scan only
active video inputs or even inputs without a video signal.
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