Bartec SDBX-Cat5-KVM-Extender User manual

Dear Customer,
congratulations to purchase the SDBX-Cat5-KVM-Extender for VGA-monitor, mouse, keyboard. This
product correspond to the ultimate requisitions for quality and technics. If you still have problems with
your device, please refer to your sales office.
The SDBX-Cat5-KVM-Extender allows you to remotely position your UXGA monitor, keyboard and mouse
up to 300 Metres from your PC System unit using a single Category 5 UTP/STP 4-pair cable.
Please read this manual before installing and operating the units. Please record the serial number, the
date of purchase and your sales office. The serial number is located on the backside of the units. These
data would be important, if you ever need to repair one of the parts.
SDBX-Cat5-KVM-Extender
1 port without local access .............................K434-S1
1 port with local access ................................K434-D1
1 port without local access with audio/serial support .........K434-A1
1 port with local access with audio/serial support ............K434-DA
2 port without local access .............................K434-S2
2 port with local access with audio/serial support ............K434-A2
4 port without local access .............................K434-S4 (Q4/2003)
4 port with local access with audio/serial support ............K434-A4 (Q4/2003)
SDBX-Cat5-KVM-Extender
monitor, keyboard and mouse (PS2)
1600x1200@200m, 1280x1024@300m
1-port-, 2-port- and 4-port-devices

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22
You have purchased a valuable device,
which should meet best all
requirements. To do this, it is
necessary, to get an overview of
behavior of the device, its functions and
the different setup pssibilities and
options.
Please read this manual carefully.
Please record the serial number and
the date of purchase inside of this
manual. The serial number is located
on the backside of the units. These
data would be important, if you ever
need to repair one of the parts. For
competent users, we suggest, to read
et least the part ‘Quick Startup’.
If you have any question to the product,
or if you need aid at installation time,
please do not hesitate to contact your
dealer. He will like to support you.
Serial Number
date of purchase
Your dealer

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TABLE OF CONTENS
Introduction 24
Technical data 25
Compatibility 25
Features: 25
Connectors/Cables 26
LED Indicators 27
Getting started 28
Commands - Overview 28
Commands 29
Firmware Upgrade 32
Video Tuning 33
Quick Startup 34
Operation 34
Dual Access 34
Local Units 36
Addendum 36
Order Notation 38
schedule of parts supplied: 39
CE declaration of conformity 40
Disclaimer 40

Introduction
Features
This product has a number of unique features that allow transparent remote operation of your
PC.
•Access your CPU up to 300 Meters away. You need only a single CAT 5 twisted pair cable per
each VGA channel. Please use installation cables (with solid wires) - patch cables (with
stranded wires) are not useful for bridging distances.
•Keyboard adjustable Video Equalisation - Compensates for loss of image quality due to cable
length
•Fully buffered signals to ensure consistent remote operation of you PC
•PS/2 keyboard and PS/2 mouse emulation allowing you to ‘Plug & Play’ - Intelligent keyboard
and mouse emulation ensures the PC boots and operates correctly under all possible
circumstances as well as allowing ‘Plug & Play’ initialisation of the remote keyboard and
mouse.
Operation
The SDBX-Cat5-KVM-Extender is simple to operate and works with all operating systems - no
software is required. Just connect the units up as described and you’re ready to work. Complete
keyboard and PS/2 mouse emulation allows you to ‘Plug & Play’. Your PC will boot even if the
remote end of the link is not powered or the keyboard and / or mouse are disconnected.
Mounting arrangement
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24 Introduction

Technical data
power supply
local unit : from PC
remote unit : 9V DC Regulated, 1000mA, Floating Output
interfaces
monitor : VGA, SVGA, XGA, RGB
resolution up to 1280x1024 NO Plug&Play!
keyboard : IBM-PS/2 (AT with adaptor)
mouse : IBM-PS/2 Two Button, Microsoft Intellimouse
Logitech 3-Button PS2
serial (only SDLink/AM) : transparent with handshake up to 19200 BAUD
audio (only SDLink/AM) : bidirectional, virtual CD-quality 38,4kHz, 16 Bit
interconnect cable : simplex S-UTP Cat5 4x2xAWG24, e.g. type 402-0J or
(not in schedule of parts) wiring according EIA/TIA
max. distance : up to 50m (app. 160 ft)
dimensions
weight : app.1.5 kg Complete package, 0,25 each unit
length/width/height : app. 110 x 80 x 25 mm: SDLink/LC (2 devices)
app. 110 x 80 x 44 mm: SDLink/DM + /AM (2 devices)
temperature operation : app. 10°C ... 45°C
Compatibility
To operate in various environments and with hardware from many manufacturers, this product
has a number of specific features, and has been tested with a wide variety of hardware.
However, it is impossible to guarantee correct operation with every keyboard, monitor, mouse
and motherboard currently on the market.
The CAT5 KVM Mini Extender is compatible with the following equipment:
System Unit: PC/AT, PS/2 and 100% compatible clones.
Keyboard: PC/AT, Enhanced Keyboard. Some older XT/AT auto-
sensing keyboards may not be compatible
PS/2 Mouse: Standard PS/2 Mouse, Microsoft Intellimouse,
Logitech 3-Button PS/2 Mouse
Monitor: VGA, Super VGA, XGA, RGB (Sync-on-Green)
Note: If your PC does not have a PS/2 style mouse port, the Mini Extender may be connected to
a serial port of your PC via an additional mouse protocol converter (MDAPT).
Features:
•Supports High Video Resolutions for use with TFT displays
1600x1200 (60Hz) @ 200 Metres
1280x1024 (75Hz) @ 300 Metres
Higher resolutions may be possible at shorter distances. Maximum distances quoted will be
less with higher refresh rates
•Integrated Skew Compensation for operation with any CATx cable.Skew compensation
available on all video channels. Skew compensation available on any (or all) colours. Maximum
compensation of 42nS is sufficient for most applications. Compensation step size is 2.8nS
•Independent Low-Frequency (LF) and High-Frequency (HF) Equalization Adjustment ensures
optimum video tuning
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Technical data 25

•All Control and Video Tuning made through attached Keyboard - Simple to set up. Quick Skew,
Assisted EQ and Channel 0 features help make video tuning almost automatic
•Settings stored in EEPROM Memory. Set the system up once only. Settings restored on power
up
•Flash Upgradeable (cable required)
•Single and Multi-Head (Dual/Quad) Video Support - One CATx cable required per channel
•Status Indicator LED(s) on each RJ45
•Small Footprint Chassis:
SDBX/R1, SDBX/R2: 140x145x29mm
SDBX/RA1, SDBX/RA2: 140x145x44mm (1U)
SDBX/L2: 110x146x29mm
SDBX/LA2 110x146x29mm (1U)
SDBX/R4, SDBX/RA4: To be defined
•Rack Mount Option - Plate will be available to mount three units across 1U
•9V (Isolated) Universal PSU (Supplied for Remote Unit)
Connectors/Cables
Pinout local unit (SDBX/Dx) and remote unit. Please use only the genuine
PC cables for connecting the local unit to the CPU
VGA connector
1 RED
2 GREEN
3 BLUE
4 GND
5 n.c.
6 Red GND
7 Green GND
8 Blue GND
9 n.c.
10 GND
11 n.c.
12 n.c.
13 HSYNC
14 VSYNC
15 n.c.
mouse connector
1 mouse-Data
2 n.c.
3 GND
4 monitor/+5V
5 mouse-Clock
6 n.c.
keyboard connector
1 keyboard-Data
2 n.c.
3 GND
4 monitor/+5V
5 keyboard-Clock
6 n.c.
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26 Connectors/Cables
HD15-female
miniDIN 6p-female
miniDIN 6p-female

Cat5 interconnect cable
The Local and Remote Units are interconnected by industry
standard structured cabling (Category 5, Cat5e, Cat6, Cat7
UTP/STP, 4-pair) terminated with RJ45 connectors. This
cable is not supplied with the Extenders.
The cable used should be solid trunk cable.Stranded
patch cable will result in poor quality video.Note: That
failure to wire the twisted pairs correctly will impair the
video quality dramatically and / or prevent correct
operation.
The Mini Extender is designed for use up to a maximum
cable length of 300 Meters. At this length the video quality
should still be acceptable even at a screen resolution of
1280x1024 (75Hz).
Although a single continuous length of interconnect cable is
preferable, operation is possible through multiple patch
panels. However, the more patch panels the cable is routed
through, the greater the chance of video signal degradation.
Using other types of structured cabling
Although specified for Category 5 cabling, the Mini Extender
system has been tested on CAT 3 cable and on pairs within
a 25-pair UTP trunk cable.
SDBX/S1, SDBX/SA1, SDBX/D1 and SDBX/DA1 use single CATx cable, which carries all video
and data signals
SDBX/S2, SDBX/SA2, SDBX/S4 and SDBX/SA4 use one single Cat5 cable per VGA port. The
CATx cable connected to ‘Interconnect 1’ carries Video Channel 1 & all data signals. This is the
primary interconnect. Secondary CATx cables (Interconnects2-4)carry Video Channels2-4.
In order to send Keyboard, Mouse, Audio and Serial signals to the PC the primary interconnect
must be connected.
The primary interconnect does not have to be connected in order to use the keyboard
attached to the Remote Unit for set-up. However, if the primary interconnect is
disconnected the keyboard cannot be used for configuration for 15 seconds after
disconnection (to maintain data integrity).
LED Indicators
There are two status LED(s) on each RJ45 connector:
Green Led: OFF Remote Unit is not powered
ON Remote Unit is powered & no video found
FLASH Remote Unit is powered, Video sync found
Yellow Led: OFF No data transfer with Local Unit
FLASH Data transfer with Local Unit
ON Remote Unit in Command Mode
The Yellow LED is only active on the Primary Interconnect (Channel 1)
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LED Indicators 27

Getting started
The SDBX CAT5 Extender consists of a Local and a Remote Unit interconnected by a single or
up to four structured cables. The CATx cable connected to ‘Interconnect 1’ carries Video Channel
1 & all data signals. This is the primary interconnect. Secondary CATx cables (Interconnects 2 -
4) carry Video Channels2-4.TheLocal Unit is connected to the PC’s keyboard, VGA and PS/2
mouse ports. The keyboard, monitor and mouse are connected directly to the Remote Unit, which
is powered by a power supply whilst the Local Unit is powered by the PC.
Connecting Up
•Switch off your PC and power up the Remote Unit by connecting the mains adapter and
switching it on. Only use the mains adapter supplied.
•Connect all remaining cables as shown in Figure 2.
•Power on your PC and check that the keyboard operates correctly. Boot an operating system
(such as Windows) or application you intend to use. Check that the mouse functions (if
required).
•Check that the link integrity LED on the local unit flashes on and off.
We recommend that the complete system is tested in one room before permanent
installation. If a long interconnect cable is not available, use a patch lead to test basic unit
operation with your PC.
All configuration and video tuning is carried out using the keyboard connected to the Remote
Unit. A hot-key sequence is used to enter command mode where settings may be adjusted and
certain modes of operation configured.
Commands - Overview
If there is not mentioned something else, the §- key and the ¨- key refer to those keys, which
are located at the left side of the keyboard. Keys on the right side of the keyboard will regularily
NOT cause to execute the respective command! Keys, oted together with a ‘+’ sign, must be
pressed simultaneously or sequentially, by holding each key pressed, until all keys of this
sequence are pressed.
Enter Command Mode §+¨+
Exit Command Mode & Save °
Exit Command Mode Without Save §°
Select Individual Video Channel For Adjustment 1or 2or 3or 4
Select ALL Video Channels 0
Increase LF Equalization (Coarse) L+£
Increase LF Equalization (Fine) L+¤
Decrease LF Equalization (Fine) l+¥
Decrease LF Equalization (Coarse) l+¢
Increase HF Equalization (Coarse) H+£
Increase HF Equalization (Fine) H+¤
Decrease HF Equalization (Fine) H+¥
Decrease HF Equalization (Coarse) H+¢
Next Assisted EQ Setting (+25m) §+³
Previous Assisted EQ Setting (-25m) §+´
Reset EQ & Delay Values §+²
Reset EQ Values §+¶
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Increase RED Delay r+¤
Increase GREEN Delay g+¤
Increase BLUE Delay b+¤
Decrease RED Delay r+¥
Decrease GREEN Delay g+¥
Decrease BLUE Delay b+¥
Quick Skew – Toggle RED Delay §+r
Quick Skew – Toggle GREEN Delay §+g
Quick Skew – Toggle BLUE Delay §+b
Reset Mouse and Keyboard 
Send NULL Mouse Byte 
Local Unit Scroll Lock Key Mode 
Local Unit Initial Hot Key 
Factory Reset §+
Toggle Local Unit Private Mode ®
Commands
nEnter Command Mode §+¨+
In Command Mode the keyboard LED(s) will flash (as described below) to indicate which video
channel is currently selected. In Command Mode the front panel yellow LED will be continuously
lit. Command Mode will automatically time out after 30 sec of inactivity and all settings will be
saved to EEPROM.
nExit Command Mode & Save °
Exit Command Mode and save all settings to EEPROM.
nExit Command Mode Without Save §°
Exit Command Mode without saving changes to EEPROM.
nSelect Individual Video Channel For Adjustment 1or 2or 3or 4
Apply subsequent video adjustments to the selected channel. On Command Mode entry the
default video channel is 1 You may only select video channels that are available on the Remote
Unit model being used. The keyboard LED(s) will regularly blink a number of times to indicate
which video channel is currently selected.
nSelect ALL Video Channels 0
Use Channel 0 to apply subsequent video adjustments to ALL video channels simultaneously.
Useful for setting up multi-head systems, where the cable lengths are almost identical. Only
applicable on dual/quad video models. The keyboard LED(s) will flash slowly to indicate that
Channel 0 (ALL video channels) is selected.
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Commands 29

nIncrease LF Equalization (Coarse) L+£
Increase LF Equalization (Fine) L+¤
Decrease LF Equalization (Fine) l+¥
Decrease LF Equalization (Coarse) l+¢
Adjust Low-Frequency for the selected video channel(s). Use to remove ‘video smearing’ prior to
setting HF EQ. Adjust until black smears to the right of large objects such as window title bars
just disappear. Too much compensation will cause white streaks to appear.
nIncrease HF Equalization (Coarse) H+£
Increase HF Equalization (Fine) H+¤
Decrease HF Equalization (Fine) H+¥
Decrease HF Equalization (Coarse) H+¢
Adjust High-Frequency for the selected video channel(s). Use to sharpen image after setting LF
EQ. Adjust until a white edge to the right of small characters just starts to appear. After adjusting
HF you may need to finely adjust LF EQ again.
nNext Assisted EQ Setting (+25m) §+³
Previous Assisted EQ Setting (-25m) §+´
Assisted EQ steps through a table of preset LF & HF EQ values for different cable lengths (in
25m increments calibrated from 0 to 375m). Use Assisted EQ to save time by quickly setting the
approximate EQ for the currently selected video channel(s). Fine adjustments may then be made.
nReset EQ & Delay Values §+²
Set all video EQ (HF & LF) and delay values to zero for the currently selected video channel(s).
Reset all video channels by selecting Channel 0 prior to issuing this command.
nReset EQ Values §+¶
Set all video EQ (HF & LF) values to zero for the currently selected video channel(s). Current
delay values are not affected. Reset all video channels by selecting Channel 0 prior to issuing
this command.
nIncrease RED Delay r+¤
Increase GREEN Delay g+¤
Increase BLUE Delay b+¤
Decrease RED Delay r+¥
Decrease GREEN Delay g+¥
Decrease BLUE Delay b+¥
Compensate for Cat5e & Cat6 skew on any colour for the currently selected video channel(s).
Cat5e and Cat6 cables have a different skew on the different pairs of wires. Because of this, the
wires do not all have the same length, there are delays on the synchronous data stream on
different pairs. This causes, that i.e. the green component of a pixel is faster than the red or blue
component. Now all characters and graphics get a green fringe at the left side. Skew
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compensation is available on all video channels. Skew compensation is available on any (or all)
colours. Maximum compensation of 42nS is sufficient for most applications. Compensation step
size is 2.8nS.
Use Channel 0 to compensate for skew on all channels simultaneously. Simplifies setting up
large multi-head installations where a consistent cable type is used and the adjustments required
are always the same.
The preferred way to adjust for skew is by using a Test Card such as the one available at
http://testcard.kvmextender.info. Adjust until the three vertical lines (RGB) are perfectly
aligned. Alternatively, display some text in a large font on a white background and adjust
until there is no visible colour fringing at the edges of characters.
The direction of skew adjustment will be different depending on whether you have a back or white
background. Sometimes the optimum skew adjustment will actually be one step out from that
suggested by the test card. The maximum amount of skew correction available is 42nS. This is
more than adequate for the vast majority of cables. However, it may not be enough if you are
using a particularly long run of a cable which exhibits severe delay skew. In this case an
additional external delay line (such as the SDLY1) may be required or pair-swapping considered
to minimise skew.
nQuick Skew – Toggle RED Delay §+r
Quick Skew – Toggle GREEN Delay §+g
Quick Skew – Toggle BLUE Delay §+b
Use Quick Skew to set the delay (in one step) to the typical value required in many installations
for eliminating skew. Issuing a Quick Skew command will toggle between the delay on a
particular colour between zero and fixed amount (~19nS). The delay can then be fine tuned from
this point.
Use the Quick Skew toggle to rapidly determine which main colour requires delaying or to
quickly set the delay on a colour back to zero. In many instances using Quick Skew on green is
all that is necessary.
Configuration Commands
(processed in Command Mode)
nReset Mouse and Keyboard 
Request Local Unit to reset the keyboard and mouse. Useful if the keyboard gets stuck in the
wrong mode or the mouse is not initialised correctly. Automatic exit from Command Mode after
issuing this command
nSend NULL Mouse Byte 
Send a null mouse byte to the system should the mouse get out of sync (erratic movement &
windows opening etc). You may need to enter this command a number of times to re-sync.
Alternatively, stop moving the mouse for a few seconds and the operating system’s mouse
drivers may automatically re-synchronise. Automatic exit from Command Mode after issuing this
command
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Commands 31

Note: Issuing the Null Mouse Command when the mouse is operating correctly will cause
it to go out of sync (unless the mouse driver is auto-correcting). If you issued this
command while the mouse was working correctly, please enter this command a several
times, until the mous is resynchronized again.
nLocal Unit Scroll Lock Key Mode 
In most cases the scroll lock key (Local & Remote) operates as normal. However, certain SDLink
dual-access Local Units (such as the SDLink2) use the scroll lock key to lock out the Remote Unit
(Private Mode) in which case the scroll lock key is not passed to the system. Use this command
to toggle this feature (setting stored in EEPROM) if normal scroll lock operation is required. This
command only applies to firmware versions lower than ‘S50’.
The scroll lock key on the remote will always function as normal. However, if the Local Unit
Private Mode function is enabled then the scroll lock LED on the keyboard will never light when
this key is pressed because the indicator is used to show that the Remote Unit is disabled
(Private Mode). Automatic exit from Command Mode after issuing this command
nLocal Unit Initial Hot Key 
Dual-Access Local Units with firmware version of ‘S50’ and above (all SDBX range and SDLink
with Audio/Serial) use a hot-key sequence for control (see ‘Dual Access - Commands at the
local units’). The initial hotkey is right §by default. Use this command to toggle it to left §if
required. Automatic exit from Command Mode after issuing this command.
nFactory Reset §+
Use this command to set ALL extender settings (video & configuration) back to their factory
defaults. Automatic exit from Command Mode after issuing this command.
nToggle Local Unit Private Mode ®
Use this command to enable/disable a dual-access Local Unit (Private Mode).
Scroll Lock LED on remote keyboard will flash slowly to indicate Private Mode. All three LED’s on
the local keyboard will be lit when disabled. Local monitor will be blanked and it’s keyboard and
mouse locked. Enter command again to release Private Mode. This command only applies to
firmware versions ‘S50’ and above. Automatic exit from Command Mode after issuing this
command
Firmware Upgrade
& External Setup
Consult Technical Support regarding this feature
Through the use of a special cable connected between the Remote Unit’s mouse port and a PC’s
serial port the unit’s firmware may be upgraded and various set-up parameters retrieved or
downloaded. A small software utility called ‘ConfigXt’ runs on a PC using Windows 98 or above.
The application and firmware upgrades may be downloaded from the internet. The software will
be able to read the current settings from a Remote Unit and save them for downloading to other
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32 Firmware Upgrade

units. This could save valuable time when installing multiple units having similar length cable
runs. Currently, SDBX Local Units are not flash upgradeable.
Video Tuning
Use the following method to quickly adjust the video compensation on the
•Enter Command Mode (§+¨+).
•Bring up the test card (not full screen).
•Select the video channel(s) to adjust.
•Reset the selected channel(s) (§+²)
•Use Assisted EQ to get an approx EQ setting (§+³).
•Adjust the colour delays until the testcard’s RGB vertical lines are aligned. (Try using Quick
Skew too)
•If you are using a TFT, set it to auto-adjust.
•Fine tune HF & LF EQ for the best picture. LF removes smearing and HF adjusts sharpness.
You may obtain a better result by slightly overcompensating the LF EQ before adjusting the HF
EQ.
•If you are using a TFT, set it auto-adjust, or if you are an advanced user, manually adjust the
monitor’s clock and phase. Some TFT require a special test pattern for doing the auto adjust.
Please refer to your monitor user manual. If there is nothing mentioned, or you can’t retreive
your original test pattern, you may use a so called ‘burst-image’ with alternating white and
black, single pixel wide vertical stripes. If you do not have such a burst-image, you may do like
following: Download the burst image from our server at: http://www.ihse.de/images/burst.htm.
Follow the instructions in the user manual of your computer/operating system and make this
picture the background picture. (i.e. Start/Settings/System/Display/Background). Search the
previously stored file with the burst-image. Now select ‘tiled’ for displaying. Your display now
should have thin vertical black and white lines. Now you can process auto or manual adjust.
•Exit Command Mode and save settings (°).
Improving Video Quality on Cables Requiring Large Delays on Green
Some cables require a large delay to be inserted on green. In these cases, video quality may
often be vastly improved by simply using a cross-over patch cable at each end of the link
(normally a straight patch cable would be used to connect to a wall outlet). When using a
cross-over cable, the large delay will then be required on blue rather than green.
Explanation: Inserting delays inevitably introduces some distortion at the highest resolutions.
This may result in pixels being sampled twice on TFT screens. The human eye is much more
sensitive to green distortion than blue, so a simple pair swap (using a cross-over cable) can
improve video quality. In any pair swapping scheme it’s best to ensure green is the reference
signal (slowest) requiring zero delay and that red and blue are delayed accordingly.
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Quick Startup
For advanced users, we recommend to take an overview over the system, by reading the ‘Quick
Startup’ section.
•Switch off your PC and connect up the KVM Extender (CAT 5), keyboard, monitor and mouse
as shown.
•Power up the Remote Unit by connecting the mains adapter and switching it on. Only use the
mains adapter supplied.
•Power on your PC and check that the keyboard operates correctly. Note that the image quality
may be poor at this point.
•Boot an operating system (such as Windows) or application you intend to use. Check that the
mouse functions (if required).
•Check the link integrity (LED at the local unit - flashing)
•Enter Command Mode (§+¨+).
•Use Assisted EQ to get an approx EQ setting (§+³).
•Fine tune HF & LF EQ for the best picture. LF removes smearing and HF adjusts sharpness.
You may obtain a better result by slightly overcompensating the LF EQ before adjusting the HF
EQ.
•With cables, 100m+ it might be possible to obtain a better screen picture by processing Quick
Skew – Toggle GREEN Delay (§+g)
•Exit Command Mode and save settings (°).
Operation
The Remote Unit (when installed in its final location) may be left permanently powered up.
Keyboard & Mouse Emulation
The SDBX KVM Extender uses a microprocessor to emulate the keyboard and mouse. This
means that a keyboard and / or mouse do not have to be connected to the Remote Unit for your
PC to boot. In fact the PC will boot with only the Local Unit connected.
This feature ensures that your PC will always operate regardless of whether the Remote Unit is
actually connected or powered. The remote keyboard and mouse may be plugged in and out at
any time. In addition, emulation allows multiple Local/Remote Units to be used by simply
swapping over CAT 5 cables.
Dual Access
at local units - K434-D1 and K434-DA only
The KVM Extender Dual version allows you to connect an additional keyboard, monitor, and
mouse to your system through the Local Unit. The PC may now be operated from either of two
locations though not simultaneously.
To activate a console, simply press any key on the keyboard (ignored). This console is now
active. The other console cannot operate whilst the active console is in use. Console switching
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34 Quick Startup

may only occur when the active console’s keyboard or mouse are not used for more than
inactivity timeout period ( 2 seconds).
Note: Using normal mice (with a trackball on the bottom), there are possible circumstances,
where the mouse is placed disadvatageously, where the mouse sends, depending on small
vibrations, continously data to the PC. Due to this, there is no access possible from the other
console. In this case please move the mouse for a short way, to reach a stable position. To
prevent this, or in cases with strong vibrations, please unplug the mouse and reseat it only during
access.
Commands at the local units
All SDBX Local Units that feature dual access (SDBX/D1, SDBX/DA1) as well as SDLink Local
Units with Audio/Serial may have certain commands entered at the Local keyboard. All SDBX
dual access local units have Enhanced Private Mode where the local unit can disable the
remote or vice-versa.
To enter a command, press and release the initial hot-key followed the command key on the
LOCAL keyboard: (Initial Hot-Key: right §might to be modified, see above - Local Unit Initial
Hot Key)
nToggle Local Unit Private Mode ®
Use this command to enable/disable a dual-access Local Unit (Private Mode).
Scroll Lock LED on remote keyboard will flash slowly to indicate Private Mode. All three LED’s on
the local keyboard will be lit when disabled. Local monitor will be blanked and it’s keyboard and
mouse locked. Enter command again to release Private Mode. This command only applies to
firmware versions ‘S50’ and above. Automatic exit from Command Mode after issuing this
command
nReset Mouse and Keyboard <Num Pad> £
Request Local Unit to reset the keyboard and mouse. Useful if the keyboard gets stuck in the
wrong mode or the mouse is not initialised correctly. Automatic exit from Command Mode after
issuing this command
nSend NULL Mouse Byte <Num Pad> ¥
Send a null mouse byte to the system should the mouse get out of sync (erratic movement &
windows opening etc). You may need to enter this command a number of times to re-sync.
Alternatively, stop moving the mouse for a few seconds and the operating system’s mouse
drivers may automatically re-synchronise. Automatic exit from Command Mode after issuing this
command
Note: Issuing the Null Mouse Command when the mouse is operating correctly will cause
it to go out of sync (unless the mouse driver is auto-correcting). If you issued this
command while the mouse was working correctly, please enter this command a several
times, until the mous is resynchronized again.
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Dual Access 35

Local Units
The SDBX remote units will work with ALL local units of SDBX and SDLink series. Therefor there
are only local units for 2port devices available (SDBX/S2 and SDBX/SA2). Explanations to these
devices:
•Port 1: Primary channel which carries primary KVM.
Connect to Remote Unit Port 1.
•Port 2: Carries second video channel.
Connect to Remote Unit Port 2.
•Power: Local unit is powered by through the keyboard port (on Port 1).
A 5V PSU (optional) may be connected to provide additional power
if the PC is incapable of providing sufficient current.
•Port 1 LED: ON – Unit Powered.
Flashing – Data transfer with Remote Unit.
•Port 2 LED: ON – Unit Powered & Power OK.
VERY DIM – Insufficient power. Use external PSU.
•CPU Connectors: DB25(F) – Rose compatible.
Power is supplied to the unit through the CPU connected to Port 1 or an optional 5V PSU. No
power is taken through the CPU (video) connector on Port 2.
Addendum
Extender with serial/Audio link
These extender products contain daughter boards which allow bi-directional stereo audio and a
full-duplex serial data link to be sent across the CAT5 interconnection cable in addition to PS/2
keyboard, mouse and SuperVGA video.
To set up your video, keyboard, mouse follow the instructions in the user guide. To set up the
extender’s audio and serial link, please follow all of the instructions detailed in this addendum. If
you have any questions, contact Technical Support.
serial link:
serial speed : Any up to a maximum of 19,200 Baud
Serial Data Format : Format Independent
Flow Control : RTS, CTS, DTR, DSR are sent across link
AUDIO link:
Description : Bi-directional stereo audio link
Transmission Method : Digitised virtually CD quality audio (16-bit, 38.4KHz)
Signal Levels : Line-Level (5 Volts Pk-Pk maximum)
Input Impedence : 47K
Local Unit Connectors : 2 x 3.5mm stereo jack socket (Line In & Line Out)
Remote Unit Connectors : 2 x 3.5mm stereo jack socket (Line/Mic In & Line Out)
Microphone Support : A microphone may be connected to the Remote Unit
Pullup resistor provides bias for condenser microphone
Option to set microphone amplification to +17dB
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36 Local Units

Connectors and cables
serial in
1- n.c.
2- RxD
3- TxD
4- DTR
5- GND
6- DSR
7- RTS
8- CTS
9- n.c.
serial out
1- n.c.
2- RxD
3- TxD
4- DTR
5- GND
6- DSR
7- RTS
8- CTS
9- n.c.
Serial Interface - Set Up and Operation
No setting up or user adjustments are required. Please note that on the dual access model, the
serial link is always active
Please bear in mind that the Remote Unit’s serial port is wired as DTE (i.e. the same as that on a
PC). To connect a serial printer (or other DTE rather than DCE device) to the Remote Unit, you
will need a Null-Modem (crossover) cable between the Remote Unit and the printer. Select
Xon/Xoff software flow control on the printer and PC.
A serial Touchscreen may be plugged directly into the Remote Unit.
Serial Interface – Handling Multiple Serial Devices
The extender’s serial interface transmits/receives six signals (3 signals in each direction).
Normally four of these signals are used for hardware handshaking (in addition to TX & RX).
However, because each handshaking line can support signals up to 19,200 Baud it is possible to
configure the serial interface to handle up to three simple 2-wire (Tx/Rx only) serial links.
To do this you will need to construct a custom breakout cable. Please contact technical support
for further information.
revision: August, 2003 SDBX KVM Extender
Addendum 37
DB9-female
DB9-male

Audio Interface - Set Up and Operation
The audio interface is line-level and is designed to take the output from a sound card (or other
line-level) source and be connected to a set of powered speakers at the other end of the link.
Stereo audio may be transmitted either way across the link (simultaneously).
No set up is required unless a microphone is connected to the remote unit.
Connect up the extender as follows:
•Take the line-level output from your sound card (green connector) and connect to ‘Line In’ on
the extender.
•A set of powered speakers may be connected directly to ‘Line Out’ at the opposite end of the
link.
Audio Interface – Using a Microphone
A microphone may be plugged into the ‘Line In’ connector on the Remote Unit.
There are two ways of setting up a microphone:
•The Local Unit’s ‘Line Out’ connection should normally be wired to the microphone input (Red)
on your sound card. The sound card should then be set up to provide additional amplification
(+20dB). This is the preferred connection method.
•Alternatively, the Remote Unit itself can provide microphone amplification. To set this, open up
the Remote Unit and locate the jumper labelled ‘MIC’ on the daughterboard. Connect this
jumper across the pins. The Local Unit’s ‘Line Out’ connection should then be wired to ‘Line In’
(Blue) on your sound card.
If your microphone is already amplified, follow the second method but DO NOT install the
amplification jumper in the Remote Unit.
Order Notation
SDBX-Cat5-KVM-Extender 1port without local access
order notation : SDBX/S1
part number : K434-S1
SDBX-Cat5-KVM-Extender 1port with local access
order notation : SDBX/DM
part number : K434-D1
SDBX-Cat5-KVM-Extender 1port without local access mit Audio/RS232
order notation : SDBX/SA1
part number : K434-A1
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38 Order Notation

SDBX-Cat5-KVM-Extender 1port with local access mit Audio/RS232
order notation : SDBX/DA1
part number : K434-DA
SDBX-Cat5-KVM-Extender 2port without local access
order notation : SDBX/S2
part number : K434-S2
SDBX-Cat5-KVM-Extender 2port without local access mit Audio/RS232
order notation : SDBX/SA2
part number : 434-A2
ATTENTION! The following devices are not available before Q4/2003!
SDBX-Cat5-KVM-Extender 4port without local access
order notation : SDBX/S4
part number : K434-S4
SDBX-Cat5-KVM-Extender 4port without local access mit Audio/RS232
order notation : SDBX/SA4
part number : K434-A4
schedule of parts supplied:
All SDBX come with local uni, remote unit, CPU cables and international p.s.u. for remote unit.
Local unit regularily is powered by the CPU through the keyboard connector. A 5V PSU (optional)
may be connected to provide additional power, if the PC is incapable of providing sufficient
current or on VGA only transmission.
List of parts supplied:
•1 KVM Extender Local Unit
•1 KVM Extender Remote Unit
•1 9V 1000mA DC Regulated Power Supply (Universal Input – Isolated Output)
•1 IEC Power Cord
•1 CPU Cable Assembly (1 Metre) 2 pieces with 2port devices and
4 pieces with 4port devices
•2 Audio serial cables with all devices with serial/Audio Extension
•1 User Manual
Interconnect cable between local interface and remote interface is not included. The KVM
Extender has been tested with all major makes of CAT 5 cable including BICC-VERO, Mohawk,
AT&T.
revision: August, 2003 SDBX KVM Extender
schedule of parts supplied: 39

Caution: Only use the power supply originally supplied with this product.The KVM
Extender has a PS/2 type keyboard connector. If your system uses the AT type 5-pin DIN
connectors adapters will be required. If your PC does not have a PS/2 mouse port, please refer
to the note under the ‘Compatibility’ section of this manual.
Order notation accessories
junction cable: Cat5 simplex, 4x2xAWG24 402-0J
plug-mounting (incl. plug set): Cat5 simplex 402-0A
p.s.u.: optional for local unit 434-3N
p.s.u.: spare for remote unit 434-2N
CE declaration of conformity
declaration of manufactorer
This Equipment complies with the requirements of the European EMC directive 89/336 EEC in
respect of EN55022 Class B, EN50082-1 and EN 60555-2 and the Low Voltage Directive.
This equipment has been found to comply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own
expense.
Disclaimer
While every precaution has been taken in the preparation of this manual, the manufactorer
assumes no resposibility for errors or omissions. Neither does the manufacturer assume any
liability for damages resulting from the use of the information contained herein. The manufacturer
reserves the right to change the specifications, functions, or circuitry of the product without
notice.
The manufacturer cannot accept liability for damage due to misuse of the product or due to other
circumstances outside the manufacturer’s control. And the manufacturer will not be responsible
for any loss, damage, or injury arising directly or indirectly from the use of this product.
revision: August, 2003 SDBX KVM Extender
40 CE declaration of conformity