StarTech.com SV231DD2DUA User manual

Manual Revision: 03/29/2011
DE: Bedienungsanleitung - de.startech.com
FR: Guide de l'utilisateur - fr.startech.com
ES: Guía del usuario - es.startech.com
IT: Guida per l'uso - it.startech.com
NL: Gebruiksaanwijzing - nl.startech.com
PT: Guia do usuário - pt.startech.com
For the most up-to-date information, please visit: www.startech.com
SV231DD2DUA
SV431DD2DUA
Dual DVI USB KVM Switch

FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment
o and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit dierent from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
Use of Trademarks, Registered Trademarks, and other Protected Names and Symbols
This manual may make reference to trademarks, registered trademarks, and other protected
names and/or symbols of third-party companies not related in any way to StarTech.com.
Where they occur these references are for illustrative purposes only and do not represent an
endorsement of a product or service by StarTech.com, or an endorsement of the product(s) to
which this manual applies by the third-party company in question. Regardless of any direct
acknowledgement elsewhere in the body of this document, StarTech.com hereby acknowledges
that all trademarks, registered trademarks, service marks, and other protected names and/or
symbols contained in this manual and related documents are the property of their respective
holders.

Instruction Manual i
Table of Contents
Introduction .......................................................................................................................................................1
Packaging Contents ................................................................................................................................1
System Requirements ............................................................................................................................1
Installation............................................................................................................................................................1
Hardware Installation..............................................................................................................................2
Driver Installation......................................................................................................................................4
Operation .............................................................................................................................................................4
Front Panel ....................................................................................................................................................4
Rear Panel (SV431DD2DUA only)....................................................................................................5
HotKey Control...........................................................................................................................................6
Alternative HotKey Commands .......................................................................................................8
Change Leading HotKey.......................................................................................................................8
Specications.....................................................................................................................................................9
Technical Support...........................................................................................................................................10
Warranty Information....................................................................................................................................10

Instruction Manual 1
Introduction
Packaging Contents
• 1 x SV231DD2DUA or SV431DD2DUA KVM switch
• 1 x Power Adapter
• 1 x Instruction Manual
System Requirements
• DVI enabled computer system/video card
• USB enabled computer system
• DVI enabled display devices (e.g. monitor, projector, TV, etc.)
• A standard 104-key wired USB keyboard
• A standard 3-button wired USB mouse
Installation
NOTE: Prior to the installation, please power o all devices that will be connected to this
system. Ensure that all devices you will connect are properly grounded. Place cables away from
uorescent lights, air conditioners, and machines that are likely to generate electrical noise. If
you experience any problems using a USB KVM switch, the following BIOS setup changes may be
necessary for PC users and not necessary for Mac users:
• Set HALT ON ERROR to ALL BUT KEYBOARD.
• In PNP AND PCI SETUP, set PNP OS INSTALLED to YES and set USB IRQ to ENABLED.
Dierent systems may use dierent naming, so contact your system manufacturer for further
assistance with these settings.

Instruction Manual 2
Port Selection/Link LED
Port Selection
button
Power LED
Front View (SV431DD2DUA shown)
Rear View (SV431DD2DUA shown)
Console DVI
connector (output)
PCI
connectors
FUNC
button
DC Power
connector
3.5 mm Audio
Speaker/MIC
USB Hub connectors
USB keyboard/
mouse connectors

Instruction Manual 3
1. Plug 1 or 2 monitor(s) into the Console side DVI connector(s); plug a USB keyboard and a
USB mouse into the dedicated USB keyboard and mouse ports on the KVM switch.
2. Use a male-to-male DVI video cable to connect the DVI connector(s) on the computer’s
video card, to one of the KVM’s PC ports (ie. PC1). A dedicated DVI, USB and audio 4-in-1
KVM cable can be used (ie. StarTech.com ID: USBDVI4N1A6).
3. Use a USB type A-B Cable to connect the KVM’s USB port (type B, square connector) for the
PC port used in Step 2, and the USB port on the computer (type A, at connector).
4. Repeat for Steps 2 and 3 for each PC port on the KVM switch, or each computer you wish
to use on the KVM.
NOTE: Make sure that you have connected monitor(s) into the Console’s DVI port(s) before
plugging/unplugging the PC’s video connector(s).
* installation pictures are representation only

Instruction Manual 4
Driver Installation
No driver installation is required for the KVM switch, as the keyboard and mouse uses native
USB keyboard/mouse drivers that are already installed on all operating systems that fully
support USB.
Operation
Front Panel
Port Selection/Link LED
The LED turns green when the connected computer is powered-on. The corresponding LED will
also illuminate red when that PC port is currently selected.
Port Selection Button
Pushing the front panel “Select” button toggles between the PC ports on the KVM switch.
Auto Scan
The KVM automatically scans through the powered-on computers in sequence on a xed time
interval (see Scan Time below).
To activate Auto Scan, press down front panel push buttons“3” and “4” simultaneously. The port
LED ashes during Auto Scan. Auto Scan is eective for powered-on computers only. To exit the
Auto Scan mode, just tap any one of the push buttons. (SV431DD2DUA only)
NOTE: When Auto Scan detects any keyboard activity, it suspends the scanning until the activity
stops; it then resumes with the next computer in sequence. The length of the Auto Scan interval
(Scan Rate) is adjustable, see below.
Scan Time
Four options are available for users to set the Scan Time duration, which includes 3, 8, 15 and 30
seconds.
To change the Scan Time interval, press both front panel buttons “1” and “2” simultaneously. The
unit beeps 1, 2, 3 or 4 times for Scan Time of 3, 8, 15 or 30 seconds respectively. (SV431DD2DUA
only)
NOTE: Scan Time is automatically set to the default of 3 seconds when the units loses power.

Instruction Manual 5
Rear Panel (SV431DD2DUA only)
To adjust the video signal strength/equalization settings for the length or quality of DVI cable
being used, the “FUNC” button combined with the front panel push buttons can be used.
1. Press “FUNC” button three times, and the LED for “POWER” will start to ash once per
second.
2. Press front panel push button “1” one or two times to adjust the signal equalization with
one beep (normal) or two beeps (enhance) respectively.
or
Press front panel push button “3” one or two times to adjust the video signal output
current with one beep (normal) or two beeps (enhance) respectively.
or
Press front panel push button “4” one, two, three, or four times to adjust the output
emphasis with one beep (no pre-emphasis), two beeps (low pre-emphasis), three beeps
(medium pre-emphasis), or four beeps (high pre-emphasis).
3. Once the settings have been adjusted, press the“FUNC” button one time to exit this
mode.

Instruction Manual 6
HotKey Control
A Hotkey command is a short keyboard sequence for selecting a computer, activating computer
scan, etc. A hotkey sequence starts with two left <CTRL> keystrokes (successively within 0.2
seconds) followed by one or two more keystrokes. A high-pitch beep will be generated for each
correct hotkey command; otherwise, one low-pitch beep is generated for errors and the bad key
sequence will not be forwarded to the selected computer.
NOTE: Press and hold Left <SHIFT> and press <NumLock> twice, then release <SHIFT> followed
by pressing left <CTRL> once, which will enable / disable the hotkey feature.
To select a computer:
Left <CTRL> + Left <CTRL> + <1>
(Example: Selects the computer at port 1.)
Left <CTRL> + Left <CTRL> + <2>
(Example: Selects the computer at port 2.)
NOTE: Do not use the keypad on the right-side of the keyboard.
Auto Scan
The KVM automatically scans through the powered-on computers in sequence on a xed time
interval (see Scan Time below).
To start Auto Scan:
Left <CTRL> + Left <CTRL> + <F1>
To abort the Auto Scan mode, press the left <CTRL> key twice.
NOTE: When Auto Scan detects any keyboard activity, it suspends the scanning until the activity
stops; it then resumes with the next computer in sequence. The length of the Auto Scan interval
(Scan Rate) is adjustable, see below.
Manual Scan allows users to manually switch back and forth between powered-on computers.
Left <CTRL> + Left <CTRL> + <F2>
To select the previous or the next computer, press <UP> or <DOWN> arrow keys. To abort the
Manual Scan, press any other key.

Instruction Manual 7
Scan Time
Four options are available for users to set the Scan Time duration, it Includes 3, 8, 15 and 30
seconds.
Note: Scan Time is set to 3 seconds by default.
To adjust Scan Rate, set the scan time of duration before switching to the next computer:
Left <CTRL> + Left <CTRL> + <F3>
The KVM Switch generates 1 to 4 beeps indicating a scan time duration for 3, 8, 15 or 30 seconds
respectively.
USB-Port Rule
There are two settings for USB-Port Rule: ON or OFF. When set to ‘ON’, the USB Hub port follows
computer selection. When set to‘OFF’, the USB Hub port stays on the currently selected PC port.
SV231DD2DUA: press the hotkey below to turn ON/OFF the USB-Port Rule for USB 1 and USB 2:
Left <CTRL> + Left <CTRL> + <F7>
SV431DD2DUA:
USB 1: press the hotkey below to turn ON/OFF the USB-Port Rule:
Left <CTRL> + Left <CTRL> + <F7>
USB 2: press the hotkey below to turn ON/OFF the USB-Port Rule:
Left <CTRL> + Left <CTRL> + <F8>
To change the PC port that the USB hub stays on to the currently selected PC port, press the
following hotkey:
Left <CTRL> + Left <CTRL> + <U>
NOTE: Please make sure that installation of the USB device has been accomplished before
switching to the next computer.

Instruction Manual 8
Alternative Hotkey Commands
In addition to the Left <CTRL> + Left <CTRL> hotkeys, there are two alternative hotkey
sequences available.
1. For the following operations, users may press <ScrollLock> twice instead of pressing left
<CTRL> twice.
To select a computer:
<ScrollLock> + <ScrollLock> + <1>
(Example: Select the computer at port 1.)
<ScrollLock> + <ScrollLock> + <2>
(Example: Select the computer at port 2.)
NOTE: Do not use the keypad at the right of the keyboard.
2. For those keyboards that do not have or support <ScrollLock>, please press and HOLD the
Left <SHIFT> and press <NumLock> twice instead of pressing Left <CTRL> twice.
To select a computer:
hold Left <SHIFT> + press <NumLock> + press <NumLock>
then release <SHIFT> + press <1>
Example: Select the computer at port 1.)
hold Left <SHIFT> + press <NumLock> + press <NumLock>
then release <SHIFT> + press <2>
(Example: Select the computer at port 2.)
NOTE: Do not use the keypad at the right of the keyboard.
Change Leading Hotkey
The default leading hotkey sequence involves pressing the left <CTRL> twice in succession
(e.g. left <CTRL> + left <CTRL>). This can be changed to the right <CTRL> key instead, to avoid
accidental activation due to using the left <CTRL> key for functions such as Copy/Paste.
To change the leading hotkey sequence to Right <CTRL>:
Left <CTRL> + Left <CTRL> + hold <ALT> + press Right <CTRL>
All hotkey commands that previously required pressing the Left
<CTRL> will be switched to requiring the right <CTRL> instead.
To change the leading hotkey sequence back to Left <CTRL>:
Right <CTRL> + Right <CTRL> + hold <ALT> + press Left <CTRL>

Instruction Manual 9
Specications
SV231DD2DUA SV431DD2DUA
Number of Ports 2 4
Computer Connectors
(per port)
2 x DVI-I female
1 x USB type B
2 x 3.5mm mini-jack
Console Connectors
2 x DVI-I female
4 x USB type A
2 x 3.5mm mini-jack
Maximum Video Resolution 1920x1200 @ 60Hz
DDC2B Yes
Audio Yes
OSD No
Cascadable No
Switching Modes Front Panel Buttons, HotKeys
Power Adapter 9-12VDC, 1.5A (included)
Enclosure Material Metal
Dimensions 100.0mm x 160.0mm
x 57.0mm
130.0mm x 220.0mm
x 60.0mm
Weight 750g 1253g

Instruction Manual 10
Technical Support
StarTech.com’s lifetime technical support is an integral part of our commit-ment to provide
industry-leading solutions. If you ever need help with your product, visit www.startech.com/
support and access our comprehensive selection of online tools, documentation,
and downloads.
Warranty Information
This product is backed by a three year warranty.
In addition, StarTech.com warrants its products against defects in materials and workmanship for
the periods noted, following the initial date of purchase. During this period, the products may
be returned for repair, or replacement with equivalent products at our discretion. The warranty
covers parts and labor costs only. StarTech.com does not warrant its products from defects or
damages arising from misuse, abuse, alteration, or normal wear and tear.
Limitation of Liability
In no event shall the liability of StarTech.com Ltd. and StarTech.com USA LLP (or their ocers,
directors, employees or agents) for any damages (whether direct or indirect, special, punitive,
incidental, consequential, or otherwise), loss of prots, loss of business, or any pecuniary loss,
arising out of or related to the use of the product exceed the actual price paid for the product.
Some states do not allow the exclusion or limitation of incidental or consequential damages. If
such laws apply, the limitations or exclusions contained in this statement may not apply to you.

Hard-to-nd made easy. At StarTech.com, that isn’t a slogan. It’s a promise.
StarTech.com is your one-stop source for every connectivity part you need. From
the latest technology to legacy products — and all the parts that bridge the old
and new — we can help you nd the parts that connect your solutions.
We make it easy to locate the parts, and we quickly deliver them wherever they
need to go. Just talk to one of our tech advisors or visit our website. You’ll be
connected to the products you need in no time.
Visit www.startech.com for complete information on all StarTech.com products
and to access exclusive resources and time-saving tools.
StarTech.com is an ISO 9001 Registered manufacturer of connectivity and technology
parts. StarTech.com was founded in 1985 and has operations in the United States,
Canada, the United Kingdom and Taiwan servicing a worldwide market.