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1.  Input selection LEDs

2.  Input selection button

3.  Output selection LEDs

4.  Status LED

5.  IR sensor

6.  Function button

Quick start guide

DE: Bedienungsanleitung - de.startech.com

FR: Guide de l'utilisateur - fr.startech.com

ES: Guía del usuario - es.startech.com

IT: Guida per l'uso - it.startech.com

NL: Gebruiksaanwijzing - nl.startech.com
PT: Guia do usuário - pt.startech.com

Manual Revision: 12/01/2016

For the latest information, technical specifications, and support for 

this product, please visit 

www.startech.com/ST121HDBTRP

Packaging contents

•  1 x HDBase-T repeater

•  1 x IR remote control

•  1 x universal power adapter (NA / UK / EU / AU)

•  1 x CAT5e cable

•  1 x mounting kit

•  1 x screw kit

•  1 x rubber foot pad set

•  1 x quick start guide

System requirements

•  1 x local HDBaseT video source or transmitter with cabling

•  1 x HDBaseT display or receiver with cabling

•  1 x HDMI source with cabling

•  1 x HDMI display with cabling

•  1 x remote destination HDBaseT display or receiver

HDBaseT™ Repeater - 4K

*actual product may vary from photos

Product overview

Front View

Rear View

1.  Power adapter port

2.  Grounding bolt

3.  IR extender I/O ports

4.  HDMI input port

5.  HDBase-T input port

6.  HDBase-T output port

7.  HDMI output port

6

6

7

8 9

11

8. EDID switch

9. EDID copy buttons

10. RS232 switch

11. RS232 port

10

About this product

HDBaseT is a standardized, zero-latency video technology that’s 

revolutionizing HDMI distribution. HDBaseT uses an advanced 

method of modulation that enables you to distribute uncompressed 

HDMI audio and video over long distances, over standard network 

cabling. 

 

This repeater receives your HDBaseT signal, and deploys it to an 

additional receiver up to 70 m away, while outputting the HDBaseT 

signal to an HDMI display at the repeaters location. The repeater also 

enables you to add an HDMI source at the repeater’s location and 

switch between sources at each connected HDMI and/or HDBaseT 

display.

Preparing your site

1.  At the local source, set up your HDBaseT video source, as 

instructed by the documentation included with it.

2.  Run your CAT5e or CAT6 cable from the RJ-45 output on the 

HDBaseT source to the location you’d like to place the repeater. 

Note:

 This needs to be a direct connection. Do not route the cable 

through any networking equipment.

3.  Set up your HDMI display near the location you’d like to place the 

repeater.

4.  (Optional) Set up your HDMI source near the location you’d like to 

place the repeater.

5.  At the remote destination, if you’re connecting to an HDBaseT 

display,  set up the display appropriately in your desired location. 

 or 

If you’re connecting to HDBaseT receiver with an HDMI display, 

set up the display appropriately in your desired location and 

connect your HDBaseT device to the display, as instructed by the 

documentation that was included with your HDBaseT receiver.  

Notes: 

Please ensure that the repeater is situated near an 

available AC power source.  Make sure all devices are turned off 

before you begin the installation.

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