StarTech.com ST121SHD50 User manual

Manual Revision: 04/24/2019
User Manual
For the latest information and specications visit
www.startech.com/ST121SHD50
HDMI® Over Cat 5e/6 Extender | 50m
Actual product may vary from photos
SKU#: ST121SHD50

1
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
Compliance Statements
FCC Compliance Statement
This equipment has been tested and 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.
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including interference
that may cause undesired operation.
Changes or modications not expressly approved by StarTech.com could void
the user’s authority to operate the equipment.
Industry Canada Statement
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe [A] est conforme à la norme NMB-003 du
Canada.
CAN ICES-3 (A)/NMB-3(A)
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.

2
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
Safety Statements
Safety Measures
• Wiring terminations should not be made with the product and/or electric
lines under power.
• Cables (including power and charging cables) should be placed and routed
to avoid creating electric, tripping or safety hazards.
Mesures de sécurité
• Les terminaisons de câblâge ne doivent pas être eectuées lorsque le produit
et/ou les câbles électriques sont sous tension.
• Les câbles (y compris les câbles d’alimentation et de chargement) doivent
être placés et acheminés de façon à éviter tout risque électrique, de chute ou
de sécurité
安全対策
• 電源が入っている状態の製品または電線の終端処理を行わないでくださ
い。
• ケーブル（電源ケーブルと充電ケーブルを含む）は、適切な配置と引き回し
を行い、電気障害やつまづきの危険性など、安全上のリスクを回避するよう
にしてください。
Misure di sicurezza
• I terminiali dei li elettrici non devono essere realizzate con il prodotto e/o le
linee elettriche sotto tensione.
• I cavi (inclusi i cavi di alimentazione e di ricarica) devono essere posizionati
e stesi in modo da evitare pericoli di inciampo, rischi di scosse elettriche o
pericoli per la sicurezza.
Säkerhetsåtgärder
• Montering av kabelavslutningar får inte göras när produkten och/eller
elledningarna är strömförda.
• Kablar (inklusive elkablar och laddningskablar) ska dras och placeras på så
sätt att risk för snubblingsolyckor och andra olyckor kan undvikas.

3
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
Table of Contents
Compliance Statements........................................................................1
Safety Statements..................................................................................2
Product Diagram....................................................................................4
Top View ....................................................................................................................................................... 4
Front View.................................................................................................................................................... 5
Rear View...................................................................................................................................................... 6
Introduction............................................................................................7
Package Contents ..................................................................................................................................... 7
Requirements ............................................................................................................................................. 7
Installation ..............................................................................................8
Preparing Your Site ................................................................................................................................... 8
Hardware Installation .............................................................................................................................. 8
Operation ................................................................................................10
Video Adjustment (Receiver Unit Only) ............................................................................................ 10
EDID Conguration................................................................................11
Auto EDID Conguration........................................................................................................................ 12
Manual EDID Conguration (EDID Copy/EDID Ghost)................................................................. 12
EDID Factory Default Setting ................................................................................................................ 13
DDC Pass Mode.......................................................................................................................................... 14
LED Indicators.........................................................................................14

4
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
Product Diagram
Top View
1LED Indicator
2EDID Copy Button
3LED Indicator
4EQ Selector
1
2
4
3

5
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
Front View
1LINK OUT A (RJ-45 Connector)
2LINK OUT B (RJ-45 Connector)
3LINK OUT A (RJ-45 Connector)
4LINK OUT B (RJ-45 Connector)
12 3 4

6
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
Rear View
1Power Jack Port
2HDMI In Port
3Power Jack Port
4HDMI Out
1 2 3 4

7
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
Introduction
The ST121SHD50 HDMI® over CAT5e/6 Video Extender kit lets
you extend HDMI® video and audio up to 165 feet (50 Meters)
(1080i) over 2 CAT5e Ethernet cables, or up to 130 Feet (40
Meters)(1080p) over 2 CAT6 Ethernet cables.
Package Contents
• HDMI over CAT5e/6 UTP transmitter x 1
• HDMI over CAT5e/6 UTP receiver x 1
• Universal power adapter (NA / EU / UK / AU) x 1
• Mounting brackets x 2
• Foot pad set x 2
• User Manual x 1
Requirements
Requirements are subject to change. For the latest
requirements, please visit www.startech.com/ST121SHD50.
Video Device
• HDMI® enabled video source device (i.e. computer, Blu-ray
Player)

8
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
Display Device
• HDMI® enabled display device (i.e. television, projector)
Cables
• HDMI® cables for Receiver and Transmitter
• CAT5e/CAT6 Cables x 2
Note: Two cables are necessary for transmitting video signal
and DDC data.
Installation
Preparing Your Site
1. Determine where the local video source (i.e. computer, Blu-
ray Player) will be located and set up the device.
2. Determine where the remote display will be located and
place/ mount the
display appropriately.
Note: This HDMI® extender kit features Power over cable, al-
lowing both the Transmitter and Receiver to be powered from
a single power source that can be connected at either end of
the connection. Please ensure that either the Transmitter or
the Receiver Unit is situated near an available AC electrical
outlet. Make sure all devices are turned o before beginning
installation.
Hardware Installation
1. Position the Transmitter Unit near the video source (i.e.
Computer, Blu-ray Player).

9
To view manuals, videos, drivers, downloads, technical drawings, and more visit www.startech.com/support
2. Connect an HDMI® cable from the video source device
(i.e. computer, Blu-ray Player) to the “HDMI® IN”on the
Transmitter Unit.
3. (Optional) If you’ve chosen to power the kit from the
Transmitter side, connect the provided power supply.
4. Connect an RJ45 terminated Cat5e/6 Ethernet cable (not
included) to the LINK OUT A (RJ-45 connector) on the
Transmitter unit.
5. Connect another RJ45 terminated Cat5e/6 Ethernet cable
(not included) to the LINK OUT B (RJ-45 connector) on the
Transmitter unit.
Note: If you are using surface cabling, ensure you have
enough Category 5e unshielded twisted pair (UTP) network
cabling to connect the Host Unit to the Remote Unit’s loca-
tion, and that each end is terminated with a RJ45 connector.
The cabling should not go through any networking equip-
ment (i.e. router, switch).
- or -
If you are using premises cabling, ensure that the Category 5
unshielded twisted pair (UTP) network cabling between the
Host 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 Host Unit
to their respective outlets. The cabling should not go through
any networking equipment (i.e. router, switch).
6. Connect the other end of the Cat5e/6 cable (from LINK OUT
A) to the LINK IN A (RJ-45 connector) on the Receiver Unit.