Atlona Omega AT-OME-ST31A User manual

1
Installation Guide
AT-OME-ST31A
Omega™ 4K/UHD HDMI over HDBaseT Receiver w/Scaler,
Ethernet, RS232, Audio Output, and Input HDMI
AT-OME-ST31A
The Atlona AT-OME-ST31A is a 3×1 switcher and HDBaseT transmitter with HDMI and USB-C
inputs. Part of the Omega™ Series of integration products for modern AV communications and
collaboration, it features mirrored HDMI and HDBaseT outputs, two-channel audio de-embedding
to an analog balanced audio output, and is HDCP 2.2 compliant. The USB-C input is ideal for
AV interfacing for newer Mac®, Chromebook™, and Windows® PCs, as well as smartphones
and tablets. Video signals up to 4K/60 4:2:0 can be transmitted over HDBaseT up to 330 feet
(100 meters). All inputs and the local HDMI output support 4K HDR and 4K/60 4:4:4 at HDMI
data rates up to 18 Gbps. Additionally, 4K downscaling to 1080p is available for the HDMI output
when connected to an HD sink. The OME-ST31A is designed for use with Omega™ Series
receivers and switchers, select HDVS Series receivers, the AT-UHD-EX-100CE-RX receiver, and
other Atlona switchers with HDBaseT inputs.
IMPORTANT: Visit http://www.atlona.com/product/AT-OME-ST31A for the latest rm-
ware updates and Installation Guide.
Package Contents
1 x AT-OME-ST31A
1 x USB-C cable
1 x Captive screw connector, 5-pin
1 x Captive screw connector, 3-pin
2 x Mounting brackets
4 x Mounting screws
1 x Installation Guide

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Installation Guide
AT-OME-ST31A
Panel Descriptions
1 PWR
This LED indicator glows solid green when
the unit is powered.
2 LINK
This LED indicator glows solid yellow
when an HDBaseT link is established,
between the AT-OME-ST31A and the
receiver.
3 FW
Connect a mini-USB cable (not included)
from this port to update the rmware.
4 INPUT
Press and release this button to cycle
through each of the inputs. The LED
indicators will display the currently active
input, and correspond to each of the
numbered inputs on the rear panel of the
unit.
5 DISPLAY
Press this button to power-on or power-
o the connected display.
6 IP MODE
Press and release this button to set the IP
mode or display the current IP address.
Refer to IP Conguration (page 6) for
more information.
7 RESET
Press and release this button to reset the
unit to factory-default settings. Refer to
Resetting to Factory-Defaults (page 6) for
more information.
8 INPUT ports
Connect a USB-C cable from a video
source to INPUT 1. Connect HDMI cables
from HD/UHD sources to INPUT 2 and
INPUT 3.
9 OUTPUT
Connect an HDMI from the HDMI port to
a display or other sink device. Connect a
category cable (CAT-5e or better), from the
HDBaseT port to a compatible HDBaseT
receiver. These ports are mirrored.
10 AUDIO OUT
Connect a 5-pin captive screw connector
block to this port, to de-embed audio to
an audio output device. Refer to Audio
Output Connector (page 3) for more
information.
11 RS-232
Connect a 3-pin captive screw block to
this port. Refer to RS-232 Connector
(page 3) for wiring information.
12 LAN
Connect an Ethernet cable to this port
from the network.
13 DC 24V
Connect the optional locking 24 V DC
power supply to this power receptacle.
Rear
OUTPUT DC 24VINPUT
23
RS-232
AT-OME-ST31A
1
L R
AUDIO OUT LAN
IP MODE
RESET
INPUTFW
3
2
1
PWR
LINK
OMEGATM
AT-OME-ST31A
DISPLAY
OUTPUT DC 24VINPUT
23
RS-232
AT-OME-ST31A
1
L R
AUDIO OUT LAN
IP MODE
RESET
INPUTFW
3
2
1
PWR
LINK
OMEGATM
AT-OME-ST31A
DISPLAY
Front
1
6 98
3 4 5
2
7 1110 12 13

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Installation Guide
AT-OME-ST31A
The AT-OME-ST31A provides an RS-232 port which can be used to control the unit or allow
command to pass through to a downstream device. Additionally, RS-232 commands can be
transmitted over HDBaseT to a PoE-compatible receiver unit.
NOTE: Typical DE-9 connectors use pin 2 for TX, pin 3 for RX, and pin 5 for
ground. On some devices functions of pins 2 and 3 are reversed.
RS-232 Connector
GND
RX
TX
1. Use wire strippers to remove a portion of the cable jacket.
2. Remove at least 3/16” (5 mm) from the insulation of the RX, TX, and GND wires.
3. Insert the TX, RX, and GND wires into correct terminal using the included 3-pin captive
screw connector.
Audio Output Connector
The AUDIO OUT connector on the AT-OME-ST31A provides the ability to de-embed audio to
an audio output device. Connect either balanced or unbalanced audio inputs, as shown below,
using the included 5-pin captive screw connector block.
Balanced audio connections use two signal wires and a ground to minimize interference in audio
signals. Unbalanced audio connections use one signal wire and a ground, and are used if system
components don’t support balanced signals.
2 1
3
2 1
3
GND GND
-
+
Rear View Rear View
-
+
GND
Side View Side View
-
+
GND
+
-
Balanced Audio using XLR Connectors
Unbalanced Audio using RCA Connectors

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Installation Guide
AT-OME-ST31A
1. Connect HDMI cables from HD/UHD sources to INPUT 2 and INPUT 3.
2. Connect a USB-C cable from a source to INPUT 1 on the switcher.
3. Connect an Ethernet cable, from the HDBaseT port to a compatible HDBaseT receiver.
4. Connect an HDMI cable from the HDMI output port to a display or other sink device.
5. Connect an Ethernet cable from the LAN port to the Local Area Network.
6. OPTIONAL: Connect an audio output device to the AUDIO OUT port, using the included
captive screw connector block. Refer to Audio Output Connector (page 3) for wiring
information.
7. OPTIONAL: Connect an RS-232 cable from the control device to the RS-232 port on the
AT-OME-ST31A. Refer to RS-232 Connector (page 3) for wiring information.
Installation
NOTE: The AT-OME-ST31A is powered over HDBaseT, by a PoE receiver unit.
If a PoE HDBaseT receiver is not used, then the AT-OME-ST31A must be
powered using the external 24 V DC power supply* (not included). When used
with the external power supply, the AT-OME-ST31A can provide power to the
connected USB-C device. This power supply can be purchased from Atlona.
* Optional power supply is available from Atlona. Part no. AT-PS-245-D4.
Refer to the tables below for recommended cabling when using Altona products with HDBaseT.
The green bars indicate the signal quality when using each type of cable. Higher-quality signals
are represented by more bars.
Cable Recommendation Guidelines
Core Shielding CAT5e CAT6 CAT6a CAT7
Solid UTP (unshielded) N/A
STP (shielded)
*Atlona recommends TIA/EIA 568-B termination for optimal performance.
Cable* Max. Distance @ 4K Max. Distance @ 1080p
CAT5e 295 feet (90 meters) 330 feet (100 meters)
CAT6 / CAT6a / CAT7 330 feet (100 meters) 330 feet (100 meters)
IMPORTANT: Stranded or patch cables are not recommended due to
performance issues.

5
Installation Guide
AT-OME-ST31A
The AT-OME-ST31A includes two mounting
brackets, which can be used to attach the unit
to any at surface. Use the two enclosure
screws, on the sides of the unit to attach the
mounting brackets.
1. Using a small Phillips screwdriver, remove
the two screws from the left side of the
enclosure.
2. Position one of the mounting brackets, as
shown below, aligning the holes on the
side of the enclosure with one set of holes
on the mounting bracket.
3. Use the screws from Step 1 to attach the
mounting bracket.
4. Repeat steps 1 and 2 to attach the
second mounting bracket to the opposite
side of the unit.
5. Mount the unit to a at surface using the
oval-shaped holes, on each mounting
bracket. If using a drywall surface, a #6
drywall screw is recommended.
OMEGA
TM
PWR
LINK
FW
1
2
3
INPUT TEST
AT-OME-ST31A
OMEGA
TM
PWR
LINK
FW
1
2
3
INPUT TEST
AT-OME-ST31A
OMEGA
TM
PWR
LINK
FW
1
2
3
INPUT TEST
AT-OME-ST31A
NOTE: Mounting brackets can
also be inverted to mount the
unit under a table or other at
surface.
Mounting Instructions

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Installation Guide
AT-OME-ST31A
IP Conguration
1. Make sure the AT-OME-ST31A is powered, by connecting a category cable (CAT-5e or
better) between a PoE-compatible receiver, such as the AT-HDVS-200-RX or AT-HDVS-SC-
RX, and the HDBaseT port on the back of the unit.
2. Press and hold the IP MODE button, on the rear of the unit, for approximately ve seconds.
Release the button once the LED indicator, next to the IP MODE button, begins to ash
green. The number of ashes will indicate the currently selected IP mode.
The AT-OME-ST31A is shipped with DHCP enabled. Once connected to a network, the DHCP
server (if available), will automatically assign an IP address to the unit. If the AT-OME-ST31A
is unable to detect a DHCP server within 15 seconds, then the unit will use a self-assigned IP
address within the range of 169.254.xxx.xxx.
Use an IP scanner, along with the MAC address on the bottom of the unit, to identify the unit on
the network. If a static IP address is desired, the unit can be switched to static IP mode.
The default static IP address is 192.168.1.254.
Switching the IP mode
IP MODE LED ashes Description
Four DHCP mode
Two Factory Static IP mode (IP address set to 192.168.1.254)
Auto IP mode
If the AT-OME-ST31A is unable to detect a DHCP server within 15 seconds, then the unit will use
a self-assigned IP address within the range of 169.254.xxx.xxx. If this occurs, connect the AT-
OME-ST31A to a computer running Microsoft Windows® and follow the procedure below.
1. Click Start > Settings > Control Panel > Network and Sharing Center.
2. Click Change adapter settings.
3. Right-click on the adapter that is used to establish a wired connection to the network, and
select Properties from the context menu.
4. Under the Ethernet Properties dialog box, select Internet Protocol Version 4 and then
click the Properties button.
5. Click the Use the following IP address radio button.
6. Enter the desired static IP address or the IP address provided by the network administrator.
If the PC does not require Internet access or if a statically-assigned IP address is being
used, then an IP address of 169.254.xxx.xxx can be entered.
7. Set the subnet mask to 255.255.0.0.
8. Click the OK button then close all Control Panel windows.
IMPORTANT: Before continuing, write down the current IP settings in order to
restore them, later. If Obtain an IP address automatically and Obtain DNS
server automatically are selected, then this step is not required.

7
Installation Guide
AT-OME-ST31A
Resetting to Factory-Defaults
To reset the AT-OME-ST31A to factory-default settings, press and hold the RESET button for
approximately 5 seconds. Release the button once the RESET LED indicator begins to ash.
The LED indicator will ash three times to indicate that the reset procedure has completed.
To display the IP address of the AT-OME-ST31A on the connected display, press and release the
IP MODE button.
For easy conguration of Atlona devices, AMS 2.0 is available from https://atlona.com/ams for
free. Two options can be used for installation: The free Linux-based software download or the
easy-to-install server hardware (AT-AMS-HW).
Once AMS has been set up:
1. Open a browser on the same network as AMS 2.0 and go to the IP address of AMS 2.0.
View the AMS 2.0 installation instructions on how to nd the IP address of the software, if
necessary.
2. Enter the login information on the AMS 2.0 web page, then click the Login button.
3. View the AT-OME-ST31A manual for more information.
AMS 2.0
Displaying the IP Address
Web GUI
The AT-OME-ST31A includes a built-in web GUI, which allows easy management and control of
all features. Follow the instructions below to access the web GUI.
1. Set the IP mode of the AT-OME-ST31A. Refer to IP Conguration (page 6) for more
information.
2. Connect an Ethernet cable from the LAN port on the AT-OME-ST31A to the Local Area
Network (LAN).
3. Use an IP scanner to determine the IP address of the AT-OME-ST31A.
4. Launch a web browser and enter the IP address of the unit.
5. The AT-OME-ST31A Login page will be displayed.
6. Enter the following information on the Login page. Login credentials are case-sensitive.
Login: admin
Password: Atlona
7. Click the Login button.

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Installation Guide
AT-OME-ST31A
Front Panel LED Indicators
The LED indicators on both the front and rear of the unit provide basic information on the current
status of the unit.
PWR Description
Solid green Unit is receiving power using the optional 24 V DC power supply
(not included) or the category cable connected between the
HDBaseT OUTPUT port and a PoE-compatible receiver.
O Unit is not powered.
LINK Description
Solid yellow An HDBaseT link is established between the transmitter and the
receiver.
O The link integrity between the AT-OME-ST31A and the PoE-
compatible receiver is compromised.
1, 2, 3 Description
Solid green The input is the currently selected input.
O The input is not selected.
Toggling Display Power
Press and release the DISPLAY button to toggle power of the connected display. Conguration
is performed using the built-in web GUI.

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Installation Guide
AT-OME-ST31A
Notes

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Installation Guide
AT-OME-ST31A
Notes

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Installation Guide
AT-OME-ST31A
Notes

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Installation Guide
AT-OME-ST31A
Version 1
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