®
®
ACU5050A-R2
ServSwitch Wizard VGA/USB™
The quickest way to extend VGA video plus four
USB devices and speakers up to nearly 1000 feet
from your computer.
Making full use of a single length of category 5, 5e, 6, 7 or 7a twisted pair
cabling.
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Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
Customer
Support
Information
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
FCC and IC RFI Statements
Federal Communications Commission and Industry Canada Radio Frequency Interference
Statements
This equipment generates, uses, and can radiate radio-frequency energy, and if not installed and used
properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has
been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart
B of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference when the equipment is
operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which
case the user at his own expense will be required to take whatever measures may be necessary to correct
the interference.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to oper-
ate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio
Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de
la classe A prescrites dans le Règlement sur le brouillage radioélectrique publié par Industrie Canada.
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ServSwitch Wizard VGA/USB
Instrucciones de Seguridad
(Normas Oficiales Mexicanas Electrical Safety Statement)
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de baño, lavabo, sótano mojado o cerca
de una alberca, etc..
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación.
Todo otro servicio deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso. La colocación del aparato eléctrico
sobre una cama, sofá, alfombra o superficie similar puede bloquea la ventilación, no se debe colocar en libreros o gabinetes
que impidan el flujo de aire por los orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros
aparatos (incluyendo amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como
se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados
sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
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Page 4
Table of Contents
Contents
1. Specifications.............................................................................................................................................................................. 6
2. Overview.................................................................................................................................................................................... 7
3. Installation.................................................................................................................................................................................. 8
3.1 Mounting the modules – desk or rack............................................................................................................................... 8
3.1.1 Desk mount .......................................................................................................................................................... 8
3.1.2 Rack mount.......................................................................................................................................................... 9
3.2 Connections ................................................................................................................................................................... 10
3.2.1 Connections at the local module........................................................................................................................ 10
3.2.2 Connections at the remote module ....................................................................................................................12
3.2.3 Dual user configuration...................................................................................................................................... 16
3.3 Video display (DDC) information..................................................................................................................................... 18
3.3.1 DDC indications ................................................................................................................................................. 19
3.4 Video compensation....................................................................................................................................................... 20
3.4.1 To enter video compensation mode................................................................................................................... 21
3.4 Video compensation (continued).................................................................................................................................... 22
3.4.3 To set the cable type.......................................................................................................................................... 22
3.4.4 To set the cable length....................................................................................................................................... 22
3.4.5 To adjust video gain........................................................................................................................................... 22
3.4.6 To adjust color skew........................................................................................................................................... 23
3.4.7 To exit video compensation mode (return to normal operation) ........................................................................ 23
4. Operation................................................................................................................................................................................. 24
4.1 General use..................................................................................................................................................................... 24
4.2 Dual user arbitration....................................................................................................................................................... 24
4.3 Peripheral operation ....................................................................................................................................................... 24
4.3.1 USB.................................................................................................................................................................... 24
Appendix A. Troubleshooting....................................................................................................................................................... 26
A.1 Status indicators ............................................................................................................................................................. 26
Appendix B. Safety Information.................................................................................................................................................... 27
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ServSwitch Wizard VGA/USB
1. Specifications
Approvals:
CE, FCC
Hardware Compatibility: All computers with VGA analog video and USB interfaces
Software Compatibility: Operates with all known software and operating systems including
Windows®, Linux®, Unix®, BSD, all Sun® OS, all Mac® OS, NetWare®, etc.
Connectors:
(local transmitter)
Video:
USB:
Other:
VGA female
USB Type B female
RJ-45 CATx link socket
Power jack
Connectors:
(remote receiver)
Video:
USB:
Other:
VGA female
(4) USB Type A female
RJ-45 CATx link socket
Power jack
Operating Temperature: 32 to 104°F (0 to 40°C)
Power:
DC jack (power adapter included)
Input:
Output:
100–240 VAC, 50/60 Hz
5VDC, 12.5W
Local unit
Dimensions (w x h x d): 118.4mm (4.66”) x 26mm (1.02”) x 74.8mm (2.94”)
Weights:
0.33kg (0.72lbs)
Remote unit
Dimensions (w x h x d): 118.4mm (4.66”) x 26mm (1.02”) x 74.8mm (2.94”)
Weights:
0.33kg (0.72lbs)
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Page 6
Chapter 2: Overview
2. Overview
Thank you for choosing the ServSwitch Wizard VGA-USB extenders which provide a very effective way to put distance
between your computer and its peripherals.
The compact casings and ease of use of the modules belie the ingenuity of their operation. Using our proprietary transmission
techniques we are able to reliably transfer more signals than ever before along a single length of Category 5, 5e, 6, 7 or 7a twist-
ed pair cabling. What this means for you is that your video, audio, USB keyboard, USB mouse and two other USB channels are all
readily and reliably available at up to 300 metres away.
Using the ServSwitch Wizard VGA-USB extenders does not mean that you need to compromise on functionality in any way. Our
highly efficient transmission methods mean that CD quality sound and high video resolutions of up to 1920 x 1200 are fully sup-
ported. Any lag effects caused by long cable runs are easily eliminated using the intuitive video compensation system located
within the remote module. Three equalisation bands allow you to ensure that every color arrives at precisely the right time, ensur-
ing a sharp image every time.
The USB connections are seamless allowing four full speed USB 2.0 devices to be used simultaneously with full support for discon-
nect/re-connect at any time without causing errors.
The ServSwitch Wizard VGA-USB extenders have been designed to be quick to install and totally transparent in operation: ‘Fit and
forget’ is the motto. So whether you are extending your workplace or creating a cost-effective distributed audio visual system, the
ServSwitch Wizard VGA-USB extenders provide the power and flexibility to create the right solution.
PC
OUT
CATx link cable
POWER
POWER
OUT
IN
REMOTE
LOCAL
OUT
VIDEO
AUDIO
USB
Up to 300 metres
separation
LINK
TO REMOTE
ON
LINK
TO LOCAL
ON
IN
S e r v S w i t c h™ W i z a r d V G A / U S B
S e r v S w i t c h™ W i z a r d V G A / U S B
A
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USB
device
USB
device
Maximum cable lengths
CAT 5
250m
250m
300m
300m
200m
CAT 5e
CAT 6
CAT 7
CAT 7a Patch
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ServSwitch Wizard VGA/USB
3. Installation
3.1 Mounting the modules – desk or rack
The modules can be situated on a desk or alternatively, for larger installations, mounted within an optional rack mount chassis.
3.1.1 Desk mount
Apply the supplied self-adhesive rubber feet to the underside of the module as shown in Figure 3-1:
Figure 3-1. Applying the supplied self-adhesive rubber feet to the underside of the module
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Page 8
Chapter 3: Installation
3.1.2 Rack mount
Note: The module switches are not accessible once it is inserted into the rack, therefore, check all settings before insertion.
1 Place the rack securing plate (available as a separate kit) onto the front of the module and secure it with the two countersunk
screws.
2 Orient the module on its side so that its labeled face is the correct way up.
3 Slide the module into the required rack position. The rectangular cut-out in the front upper lip of the rack allows the two
screws on the module’s upper edge to slide through.
4 The rack mount chassis has a series of holes in its floor that are spaced to accommodate the two screws on the module’s lower
edge. Ensure that the screws correctly locate into the two holes of the chosen slot. The rack securing plate on the module
should now be flush with the front of the rack mount chassis.
5 Use the third (pan-head) screw, in the top hole of the rack securing plate to fasten the module to the rack as shown in Figure
3-2:
I
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ON
2
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4
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Figure 3-2. Fixing the module into the rack
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ServSwitch Wizard VGA/USB
3.2 Connections
Installation of the modules is straightforward and requires minimal configuration in most cases.
• Connections at the local module
• Connections at the remote module
IMPORTANT: The ServSwitch Wizard VGA-USB can be used with other hubs in the system, but please note that the local unit
should not be connected to the downstream port of a bus-powered hub due to power constraints.
3.2.1 Connections at the local module
1 Where possible ensure that power is disconnected from the computer system to be connected.
2 Attach the video, USB (see the Important note above) and (optionally) audio connections from the computer system to the rel-
evant sockets on the local module as shown in Figure 3-3:
T
U
O
N
I
e
S
N
I
To speaker
output port
To USB port
To primary video
output port
Figure 3-3. Attaching the video, USB and (optional) audio cables
Note: Do not use a USB cable that is longer than 10 feet to connect the local module to the computer system.
3 Optionally connect local speakers to the audio output connector on the local module as shown in Figure 3-4:
O
N
I
e
S
N
I
To local
speakers
Figure 3-4. Optionally attaching local speakers
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Chapter 3: Installation
4 Optionally connect a local video monitor to the video out feed- through connector on the local module as shown in Figure 3-5:
O
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To local
monitor
Figure 3-5. Optionally attaching a local video monitor
5 Attach the connector of the category 5, 5e, 6, 7 or 7a link cable (up to 1000 feet in length) to the ‘TO REMOTE’ socket on the
local module as shown in Figure 3-6:
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Link to remote
module
Figure 3-6. Attaching the CATx link cable
3.2.1.1 Local module power
U
E
S
R
B
T
In the majority of installations, the local module will derive all of its power
successfully from the USB link with the computer system. However, if
insufficient voltage is available from the computer system, the module will
fail to operate. If this occurs (or if you do not intend to use the USB con-
nection with the computer) you will need to purchase and use a power
adapter identical to the one used for the remote module from your Black
Box stockist.
O
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E
N
M
O
T
E
L
I
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K
O
U
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P
O
W
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R
1 If external power input is necessary, attach the output connector of the
optional power adapter to the ‘POWER’ socket of the local module.
2 Attach the IEC power cord to the power adapter body and insert the
mains plug of the cord to a nearby power outlet.
Note: If a power adapter is plugged into the module but not switched on,
it will prevent the unit from deriving power from the USB connection.
To optional
power adapter
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ServSwitch Wizard VGA/USB
3.2.2 Connections at the remote module
1 Place the remote module adjacent to the user location.
2 Attach the lead from the video monitor to the video out socket on the remote module as shown in Figure 3-7:
To video
monitor
Figure 3-7. Attaching the VGA video monitor cable
3 Attach the leads of up to four USB devices (two of which are usually a keyboard and mouse) to the sockets located adjacent to
the video output connector as shown in Figure 3-8:
To USB devices,
e.g. keyboard,
mouse, etc.
Figure 3-8. Attaching the keyboard and mouse USB cables
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Page 12
Chapter 3: Installation
4 Optionally attach the lead from your stereo speakers to the audio output socket on the remote module as shown in Figure 3-9:
B
T
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N
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To speakers
Figure 3-9. Optionally attaching stereo speakers
5 Attach the connector of the category 5, 5e, 6, 7 or 7a link cable (up to 1000 feet in length) to the ‘TO LOCAL’ socket on the
remote module as shown in Figure 3-10:
T
O
O
L
N
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C
A
L
L
I
N
K
O
U
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P
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Link to local
module
Figure 3-10. Attaching the CATx link cable
continued
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ServSwitch Wizard VGA/USB
6 Attach the output connector of the power adapter to the ‘POWER’ socket of the remote module as shown in Figure 3-11:
B
T
O
O
L
N
O
C
A
L
L
I
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O
U
T
P
O
W
E
R
To power
supply
Figure 3-11. Attaching the power adapter
7 Attach the IEC power cord to the power adapter body and insert the mains plug of the cord to a nearby power outlet as
shown in Figure 3-12:
To mains
outlet
Figure 3-12. Attaching the power cord to the adapter
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Chapter 3: Installation
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Page 15
ServSwitch Wizard VGA/USB
3.2.3 Dual user configuration
You can combine two ServSwitch Wizard VGA-USB extender sets to create a dual user configuration. Such an installation would
allow a single computer to be controlled from two different positions, with each position receiving the same audio visual output
and having equal and concurrent control over the computer. Arbitration between the two positions is handled by the computer’s
USB system and so this arrangement is better suited to situations where two users would not often require simultaneous access.
USER
POWER
REMOTE
1
OUT
LINK
TO LOCAL
ON
S e r v S w i t c h™ W i z a r d V G A / U S B
R
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E
PC
CATx link (up to 1000 feet)
OUT
IN
POWER
OUT
LOCAL
VIDEO
AUDIO
LINK
IN
USB
TO REMOTE
ON
S e r v S w i t c h™ W i z a r d V G A / U S B
R
B
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K
B
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D
E
Video and audio crosslinks are
made from first local module to
the second local module
OUT
IN
POWER
OUT
LOCAL
LINK
IN
TO REMOTE
ON
S e r v S w i t c h™ W i z a r d V G A / U S B
E
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B
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R
CATx link (up to 1000 feet)
Both local modules
require their own
USB links to the PC
USER
2
POWER
REMOTE
OUT
LINK
TO LOCAL
ON
S e r v S w i t c h™ W i z a r d V G A / U S B
E
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D
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Figure 3-13. The logical layout of a dual user configuration
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Chapter 3: Installation
R
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W
O
P
T
U
O
First local module
K
N
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d
r
a
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W
™
h
c
t
i
w
S
v
r
e
S
Video crosslink
from first to
second local
module
Audio, USB and
video from the PC
T
U
O
N
I
e
Audio crosslink
S
N
I
from first to
second local
module
Second USB
from the PC
Figure 3-14. Interconnections required for a dual user configuration
Most of the connections are similar to the standard configuration. The main difference is in the links to the second local module.
Use an audio link lead to connect the audio out socket of the first local module to the audio in socket of the second. Similarly, use
a video link lead to connect the video out and video in ports. The second local module then requires its own USB link directly to
the computer. In all other respects follow the standard instructions to connect CATx links and all of the remote module connec-
tions.
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ServSwitch Wizard VGA/USB
3.3 Video display (DDC) information
The Display Data Channel (or DDC) is an industry standard scheme which allows video monitors to declare their capabilities to the
computer’s video adapter circuitry, allowing the latter to optimise their outputs accordingly. Since the widespread adoption of the
scheme, video adapters have become increasingly dependent on receiving relevant DDC information during startup, before they
will output anything more than a rudimentary video signal.
It is not possible to transmit DDC data back from the video monitor that is attached to the remote module to the computer’s
video adapter. Therefore, during startup of the local module, it will search for a video monitor connected to its local feed-through
connector:
• If a local video monitor is found, its DDC information will be compared to the information already stored and, if different, will
be copied, stored and presented to the video adapter upon request.
• If no local video monitor is found, the local module will make available its previously stored set of DDC parameters to the video
adapter upon request; or, if none were stored, a default set.
In either case, the DDC information taken by the video adapter will be used to determine the video output that is sent via the
ServSwitch Wizard VGA-USB modules to the remote monitor.
If you find that the default DDC information is not completely suitable for your remote monitor, try temporarily connecting your
remote monitor to the video out port of the local module. When the local module is powered up, it will read and store the DDC
information from your monitor. You can then return the monitor to its remote position and the new DDC information will be used
at every power on.
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Chapter 3: Installation
3.3.1 DDC indications
E
L
I
N
K
When power is first applied to the local module (either from the computer’s USB port or an optional power
adapter) it will search for valid DDC data on its video out connector. During this process, the green indicator
(built into the link connector) will flash to indicate its progress:
• If no valid DDC information is located, the green indicator will give one very short flash, representing an
attempt to read data. No changes will be made to the information already stored within the local module.
• If the DDC information is the same as that already stored, no change will be made and the green indicator
will give one single flash as the information is checked and normal operation resumes.
• If different DDC information is located, the green indicator will flash rapidly for 2 to 3 seconds while the new information is
stored. A single flash will then be given as the information is checked and normal operation resumes.
The local module’s green indicator also provides fault indications to assist with troubleshooting:
• Two flashes - Checksum error prior to copying - no information will be programmed.
• Three flashes - Too much data to fit into the module - the module can hold a maximum of two pages of DDC information.
• Rapid flashing followed by four flashes - data was lost during copying - the default data was substituted. Repeat the power on
process.
• Rapid flashing followed by five flashes - Checksum error during copying - the default data was substituted. Repeat the power
on process.
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ServSwitch Wizard VGA/USB
3.4 Video compensation
The ServSwitch Wizard VGA-USB modules include a video compensation system that allows you to get the best results from your
remote video display(s). Using this special mode you can configure:
• Cable type - Select the type of link cable used.
• Cable length - Enter the length of the link cable.
• Video gain - Alter the signal gain for the image.
• Color skew - Adjust the timing of each color to fine tune the image.
• Expert mode - Please contact Black Box technical support for details.
What is skew and why is compensation needed?
The twisted pair cabling supported by the ServSwitch Wizard VGA-USB modules consists of four pairs of wires per cable,
three of which are used to convey red, green and blue video signals to the remote video monitor. Due to the slight difference
in twist rate between these three pairs, the red, green and blue video signals may not arrive at precisely the correct times.
This is visible as separate color shadows on high contrast screen images. This effect is particularly apparent when using higher
screen resolutions and some types of category 5e cables.
The video compensation system within the remote module allows you to delay or advance the timing of any of the color
signals so that they all arrive at the monitor at the correct times.
Take a close look at a locally connected display. From left to right, groups of pixels are usually arranged in the order: R / G
/ B and the signals must arrive in the correct order to obtain the optimum screen image. The skewtest.exe pattern (on the
supplied CD-ROM) in particular helps to highlight the pixel layout by showing very narrow horizontal and vertical lines.
Test images while compensating
For best results while adjusting video compensation, arrange a combination of elements
on the remote display. We suggest the following:
• Roughly half of the screen to display standard operating system color icons on a mid-
The
skewtest.exe
test pattern
showing its RGB
green wallpaper.
• A quarter screen of the skewtest.exe pattern (available on the supplied CD-ROM).
crosses. In this case,
the green signal can be
seen out of line with the
• A quarter screen of standard black text on a white background.
Note: You need to set all of the above BEFORE entering video compensation mode
other two colors.
because the USB keyboard will be isolated from the computer.
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Chapter 3: Installation
3.4.1 To enter video compensation mode
1 Ensure that the two ServSwitch Wizard VGA-USB units are connected to the computer and powered on. A USB keyboard must
be connected to the remote unit.
2 Arrange your test images on the remote screen. Please refer to the section ‘Test images while compensating’ shown bottom
left.
3 On the remote unit, click the miniature switch 1 to its ON position.
2
1
ON
The indicators on the keyboard linked to the remote unit will begin to flash in sequence.
Also, the green indicator adjacent to the CATx link socket will flash.
Note: During video compensation mode, the keyboard and any other connected USB devices will
be temporarily isolated from the computer.
This flash sequence
indicates that you
are at Standby level
You are now at the standby level within video compensation mode.
From standby, you can choose which adjustments to make. Generally you should set the cable type and cable length options
first. Then, if necessary, use the video gain and color skew adjustments to fine tune the remote video image.
Please see the next page for details about each adjustment >>>
When your adjustments are complete, return the unit to normal operation as described below:
3.4.2 To exit video compensation mode (return to normal operation)
1 Ensure that you are at standby level by exiting from any adjustment options.
2 On the remote unit, return the miniature switch 1 to its OFF position.
All USB devices will be reconnected to the computer and normal operation will continue.
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ServSwitch Wizard VGA/USB
3.4 Video compensation (continued)
Once you have entered video compensation standby level, you can choose which adjustments to make. Generally you
should set the cable type and cable length options first. Then, if necessary, use the video gain and color skew adjustments to fine
tune the remote video image.
3.4.3 To set the cable type
a From standby, press . The Num Lock and Caps Lock indicators will flash.
b Type the number that corresponds to the category of link cable used:
• Press
• Press
• Press
• Press
• Press
for Cat 5
for Cat 5e
for Cat 6
for Cat 7
for Cat 7a
c Press
to save the value and return to standby.
Alternatively, press
to discard any change and return to standby.
3.4.4 To set the cable length
a From standby, press . The Caps Lock and Scroll Lock indicators will flash.
b Use the keypad to enter the cable length in metres.
c Press
Alternatively, press
Note: You can also increase or decrease the cable length setting from the standby level (and view the resulting change in
screen image quality) using and respectively. If necessary, press to return to a neutral setting. Such adjustments to
to save the value and return to standby.
to discard any change and return to standby.
the cable length setting are saved automatically.
3.4.5 To adjust video gain
a From standby, use
and
to decrease or increase the gain level. If necessary, press
to return to a neutral setting.
Gain adjustments are saved automatically.
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Chapter 3: Installation
3.4.6 To adjust color skew
You will only need to use these adjustments if the video image is not sharp after adjusting the cable type and length. Before
entering video compensation mode, display the suggested screen content (see Test images while compensating on the previous
page). Look for color fringes adjacent to the displayed icons and text. Also check the skewtest.exe image to confirm whether the
red, green and blue crosses are all vertically aligned.
a From standby, press either
,
or
depending on which color needs to be adjusted. The Num Lock,
Caps Lock or Scroll Lock indicators will flash for the Red, Green and Blue channels respectively.
b Use
and
to adjust the delay for the chosen color while watching the results on the remote video display.
Note: If the screen goes blank during adjustment, either press the opposite arrow key to the one you last pressed or press
to reset all delays.
c Press
to save the setting and return to standby.
to discard any change and return to standby.
Alternatively, press
3.4.7 To exit video compensation mode (return to normal operation)
1 Ensure that you are at standby level by exiting from any adjustment options.
2 On the remote unit, return the miniature switch 1 to its OFF position.
All USB devices will be reconnected to the computer and normal operation will continue.
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ServSwitch Wizard VGA/USB
4. Operation
4.1 General use
In use, the ServSwitch Wizard VGA-USB modules should be transparent - the system and its peripherals should operate exactly as
normal, the only difference being that they are now up to 300 metres apart.
In some installations, you may see some ‘shadows’ to the right of high contrast screen characters. This can be caused by an incor-
rect video compensation setting and it may be necessary to make adjustments to correct this. Please see Video compensation in
the ‘Installation’ section.
4.2 Dual user arbitration
When using two sets of ServSwitch Wizard VGA-USB modules to allow two users to access a single computer, be aware that arbi-
tration between the users is handled by the USB sub-system of the computer. Unlike with other Black Box products, this means
that both users can control the computer at exactly the same time and the resulting keyboard and mouse influences will be an
amalgam of the two inputs - i.e. a mouse move to the right by one user will cancel out a simultaneous left mouse move by the
other. The same is also true when the local module has feed-through peripherals attached to it, adjacent to the computer.
For this reason, the ServSwitch Wizard VGA-USB dual user arrangement is better suited to situations where two users would not
often require simultaneous access.
4.3 Peripheral operation
4.3.1 USB
Each ServSwitch Wizard VGA-USB remote module provides four USB outlets, each of which can support USB 2.0 peripherals at
speeds up to 12Mbps. The ServSwitch Wizard VGA-USB appears to the computer as a four port USB hub.
If the link between the modules is interrupted, any connected USB peripherals will be automatically disabled and re-enabled once
the connection is restored.
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Chapter 4: Operation
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ServSwitch Wizard VGA/USB
Appendix A. Troubleshooting
A.1 Status indicators
The green indicators built into the link connectors on each module provide useful feedback regarding the connection and power
status:
During startup (of the local module)
• One very short green flash: no valid DDC information available from a locally connected video monitor, no changes made to
stored DDC information.
• Single green flash: DDC information being read from a locally connected video monitor, but no changes made to stored DDC
information.
• Rapid green flash for 2 to 3 seconds, followed by single flash: New DDC information being read and stored from a locally con-
nected video monitor.
• Two green flashes - Checksum error prior to copying - no information will be programmed.
• Three green flashes - Too much data to fit into the module - the module can hold a maximum of two pages of DDC informa-
tion.
• Rapid green flashing followed by four flashes - data was lost during copying - the default data was substituted. Repeat the
power on process.
• Rapid green flashing followed by five flashes - Checksum error during copying - the default data was substituted. Repeat the
power on process.
During operation (either module)
• Continual yellow: Valid CATx link to other module sensed.
• Continual green: Correct power input sensed.
Important: The ServSwitch Wizard VGA-USB can be used with other hubs in the system, but please note that the local unit
should not be connected to the downstream port of a bus-powered hub due to power constraints.
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Appendices
Appendix B. Safety Information
• For use in dry, oil free indoor environments only.
• Do not use to link between buildings.
• Ensure that all twisted pair interconnect cables are installed in compliance with all applicable wiring regulations.
• Do not connect CATx link interfaces (RJ45 style connectors) to any other equipment, particularly network or telecommunica-
tions equipment.
• Warning – the power adapter contains live parts.
• No user serviceable parts are contained within the power adapter - do not dismantle.
• Plug the power adapter into a grounded socket outlet close to the module that it is powering.
• Replace the power adapter with a manufacturer approved type only.
• Do not use the power adapter if the power adapter case becomes damaged, cracked or broken or if you suspect that it is not
operating properly.
• If you use a power extension cord with the remote module, make sure the total ampere rating of the devices plugged into the
extension cord do not exceed the cord’s ampere rating. Also, make sure that the total ampere rating of all the devices plugged
into the wall outlet does not exceed the wall outlet’s ampere rating.
• Do not attempt to service the modules yourself.
• The power supply can get warm in operation – do not situate it in an enclosed space without any ventilation.
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