StarTech.com ST122UTPA User manual

VGA Video Extender
VGA Video Extender over Cat5
with Audio
ST122UTPA
Instruction Manual

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 off 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 different 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.

i
Table of Contents
Introduction..................................................................... 1
Packaging Contents.....................................................................1
System Requirements .................................................................1
Installation....................................................................... 1
Hardware Installation...................................................................1
Local Unit.....................................................................................2
Remote Unit.................................................................................2
Troubleshooting .............................................................. 5
Wiring Diagram ............................................................... 6
Specifications.................................................................. 7
Technical Support........................................................... 8
Warranty Information...................................................... 8

1
Introduction
Packaging Contents
1 x ST122UTPA Local Unit•
1 x ST122UTPA Remote Unit•
1 x Mounting Bracket kit•
2 x Power Adapters•
1 x Instruction Manual•
System Requirements
VGA enabled video source and display device•
3.5mm mini-jack enabled audio source and speaker•
Available power outlet at local and remote locations•
Installation
NOTE: To prevent potential electrical damage to the units in some
environments, ensure that the chassis is properly grounded.
Hardware Installation
This product is composed of two different units: the Local Unit and
the Remote Unit. The Local Unit takes the output from an analog
stereo audio and VGA video signal source (usually a computer) and
transmits it to the Remote Unit over Category 5 Ethernet cable. The
remote display(s) (monitor, projector, etc) and speaker(s) connect to
the Remote Unit using standard VGA and 3.5mm mini-jack connections
respectively and displays the image and audio from the local computer
onto the remote display(s) and speaker(s).

2
VGA output
(female)
Audio output
(3.5mm)
Audio output
(3.5mm)
Power
connector RJ45
output Signal Equalizer
switch
VGA input
(male)
Power
connector RJ45
output Audio input
(3.5mm)
VGA output
(female)
Audio output
(3.5mm)
Audio output
(3.5mm)
Local Unit
Remote Unit

3
Preparing Your Site
Determine where the local computer will be located and set up the1.
computer.
Determine where the remote display(s) will be located and place/2.
mount them appropriately.
If you are using surface cabling, ensure you have enough Cat53.
unshielded twisted pair (UTP) Ethernet cabling to connect the Local
Unit to the Remote Unit’s location, and that each end is terminated
with a RJ45 connector.
OR
If you are using premise cabling, ensure that the Cat5 unshielded
twisted pair (UTP) Ethernet Cabling between the Local Unit and
the Remote Unit has been properly terminated in a wall outlet in
each location and there is a patch cable long enough to connect the
Remote Unit and the Local Unit to their respective outlets.
Installing the Local Unit
Place the Local Unit near the local (source) computer.1.
Switch off the computer and disconnect any existing VGA cables.2.
If desired, connect the VGA cable from the local computer display(s)3.
to the “Monitor” ports on the Local Unit. This will enable you to see
video locally while an image is transmitted to the remote display.
You may choose to connect up to two local displays, one for each
“Monitor” port. Both outputs display the same image.
If desired, connect a set of computer speakers to the Audio 1 and/4.
or Audio 2 outputs on the local unit. This allows audio to be played
locally, while still being transmitted to the Remote Unit. A separate
speaker setup can be connected to the Audio outputs each. The
audio output from each will be the same.
Connect a male-to-female DE-15 VGA cable (not provided) to the5.
VGA Output on the local computer. Connect the opposite end to the
VGA IN port on the Local Unit.

4
Connect a 3.5mm mini-jack cable (not included) from the audio6.
output on the source device to the “Audio IN” port on the Local Unit.
Connect the Cat5 cable connection to the “CAT5 OUT” on the Local7.
Unit.
Connect the Power Adapter (provided) into an appropriate power8.
source and plug the opposite end into the power connector on the
Local Unit. The POWER LED will light up.
Installing the Remote Unit
Connect the Remote Unit to the Cat5 cable connection from the1.
Local Unit, to the “CAT5 IN” port.
Connect the VGA cable from the remote display(s) to the opposite2.
side of the Remote Unit, marked “Monitor”. You may choose to have
either one or two displays at the remote location connected to the
Remote Unit. Both outputs display the same image.
Connect the 3.5mm mini-jack cable from the remote speakers (or3.
speakers built into the display device) to the Audio 1 and/or Audio 2
port(s) on the Remote Unit. Both will output the same audio stream.
Connect the Power Adapter (provided) into an appropriate power4.
source and plug the opposite end into the power connector on the
Remote Unit. The POWER LED will light up.
CAUTION: The Category 5 Ethernet cables that connect the Local and
Remote Units carry electrical current and should not be plugged in to
other devices, as they may cause damage. We strongly recommend
marking the Ethernet cables you are using with this product at both
locations for easy identification.
Completing the Installation
Switch on the local computer and1.
local display(s) (if used).
Switch on the display(s) at the2.
remote location.
Verify that the remote display is properly displaying the image from3.
the local computer connected to the Local Unit.

5
Use the Signal Equalizer to improve the image on the remote4.
display(s) based on the approximate length of Ethernet cable
between the Local and Remote Units.
Driver Installation
No driver installation is required for this video extender as it is an
external hardware only solution, invisible to the computer system.
Troubleshooting
The following section provides troubleshooting help. The solutions are
arranged in the order they should be attempted in most situations. If
you continue to have difficulties after attempting the solutions in this
section, please contact StarTech.com technical support.
Symptom: The remote displays are black or display a “no signal”
message.
Cause: The Remote Unit is not receiving a signal from the Local Unit.
Remedy:
Check that the display is receiving power and that all cables are1.
connected.
Check that the display is connected to the Remote Unit.2.
Symptom: The remote displays do not display an image when the
local computer wakes up from Standby Mode.
Remedy: Power the remote displays OFF and ON again.
Symptom: One or more remote displays is distorted, noisy, or displays
a “signal error” or similar error message.
Cause: The screen resolution and/or refresh rate on the local
computer may be set too high for the capabilities of the remote
display.

6
Remedy:
Adjust the local computer to a lower resolution and refresh rate1.
until the remote display shows an image.
Gradually increase the resolution and refresh rate on the local2.
computer until the remote displays ceases to display an image.
Return the resolution and refresh rate on the local computer to the3.
highest resolution and refresh rate setting that displayed an image
on the remote display.
Adjust the Signal Equalizer on the Remote Unit for best4.
performance.
NOTE: If you are still unable to see an image at the remote location
after trying the above solutions, it is recommended that you verify the
Ethernet cable installation to the remote display before calling technical
support. This can be used using a standard cable tester. If you do
not have a cable tester, contact a local computer service or wiring
professional.
Wiring Diagram
Pin Wire Color Pair
1 White/Orange 2
2 Orange 2
3 White/Green 3
4 Blue 1
5 White/Blue 1
6 Green 3
7 White/Brown 4
8 Brown 4

7
Specications
Connectors (Local)
1 x DE-15 VGA male
1 x DE-15 VGA female
2 x 3.5mm stereo mini-jack
1 x RJ45
1 x Power Connector
Connectors (Remote)
2 x DE-15 VGA female
2 x 3.5mm stereo mini-jack
1 x RJ45
1 x Power Connector
LEDs 1 x Power, 1 x Activity
Maximum Distance 150m (500 ft) @ 1024x768
Maximum Resolution 1440x900 @ 50m (150 ft)
Power Adapter 9VDC, 600mA, center positive
Dimensions 60.0mm x 83.0mm x 20.0mm
Weight 181g