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4K/UHD Scaler
for HDBaseT and HDMI with USB
AT-OME-SR21
Atlona Manuals
Scaler / Receiver
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Version Information
Version Release Date Notes
1 02/19 Release
AT-OME-SR21
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Welcome to Atlona!
Thank you for purchasing this Atlona product. We hope you enjoy it and will take a extra few moments to register
your new purchase.
Registration only takes a few minutes and protects this product against theft or loss. In addition, you will receive
notications of product updates and rmware. Atlona product registration is voluntary and failure to register will not
aect the product warranty.
To register your product, go to http://www.atlona.com/registration
Sales, Marketing, and Customer Support
Main Oce
Atlona Incorporated
70 Daggett Drive
San Jose, CA 95134
United States
Oce: +1.877.536.3976 (US Toll-free)
Oce: +1.408.962.0515 (US/International)
Sales and Customer Service Hours
Monday - Friday: 6:00 a.m. - 4:30 p.m. (PST)
https://atlona.com/
Operating Notes
IMPORTANT: Visit https://atlona.com/product/AT-OME-SR21 for the latest rmware updates and
User Manual.
International Headquarters
Atlona International AG
Ringstrasse 15a
8600 Dübendorf
Switzerland
Oce: +41 43 508 4321
Sales and Customer Service Hours
Monday - Friday: 09:00 - 17:00 (UTC +1)
©2019 Atlona, Inc. All Rights Reserved. All trademarks are the property of their respective owners.
Atlona reserves the right to make changes to the hardware, packaging, and documentation without notice.
AT-OME-SR21
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Atlona, Inc. (“Atlona”) Limited Product Warranty
Coverage
Atlona warrants its products will substantially perform to their published specications and will be free from defects
in materials and workmanship under normal use, conditions and service.
Under its Limited Product Warranty, Atlona, at its sole discretion, will either:
• repair or facilitate the repair of defective products within a reasonable period of time, restore products to their
proper operating condition and return defective products free of any charge for necessary parts, labor and
shipping.
OR
• replace and return, free of charge, any defective products with direct replacement or with similar products
deemed by Atlona to perform substantially the same function as the original products.
OR
• refund the pro-rated value based on the remaining term of the warranty period, not to exceed MSRP, in cases
where products are beyond repair and/or no direct or substantially similar replacement products exist.
Repair, replacement or refund of Atlona products is the purchaser’s exclusive remedy and Atlona liability does not
extend to any other damages, incidental, consequential or otherwise.
This Limited Product Warranty extends to the original end-user purchaser of Atlona products and is non-transferrable
to any subsequent purchaser(s) or owner(s) of these products.
Coverage Periods
Atlona Limited Product Warranty Period begins on the date of purchase by the end-purchaser. The date contained on
the end-purchaser ‘s sales or delivery receipt is the proof purchase date.
Limited Product Warranty Terms – New Products
• 10 years from proof of purchase date for hardware/electronics products purchased on or after June 1, 2013.
• 3 years from proof of purchase date for hardware/electronics products purchased before June 1, 2013.
• Lifetime Limited Product Warranty for all cable products.
• NOTE: Data cable (USB-C) and Wi antenna coverd by 1 year warranty.
Limited Product Warranty Terms – Refurbished (B-Stock) Products
• 3 years from proof of purchase date for all Refurbished (B-Stock) hardware and electronic products purchased
on or after June 1, 2013.
Remedy
Atlona recommends that end-purchasers contact their authorized Atlona dealer or reseller from whom they
purchased their products. Atlona can also be contacted directly. Visit www.atlona.com for Atlona’s contact
information and hours of operation. Atlona requires that a dated sales or delivery receipt from an authorized dealer,
reseller or end-purchaser is provided before Atlona extends its warranty services. Additionally, a return merchandise
authorization (RMA) and/or case number, is required to be obtained from Atlona in advance of returns.
Atlona requires that products returned are properly packed, preferably in the original carton, for shipping. Cartons not
bearing a return authorization or case number will be refused. Atlona, at its sole discretion, reserves the right to reject
any products received without advanced authorization. Authorizations can be requested by calling 1-877-536-3976
(US toll free) or 1-408- 962-0515 (US/international) or via Atlona’s website at www.atlona.com.
Exclusions
This Limited Product Warranty excludes:
• Damage, deterioration or malfunction caused by any alteration, modication, improper use, neglect, improper
packaging or shipping (such claims must be presented to the carrier), lightning, power surges, or other acts of
nature.
AT-OME-SR21
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Atlona, Inc. (“Atlona”) Limited Product Warranty
• Damage, deterioration or malfunction resulting from the installation or removal of this product from any
installation, any unauthorized tampering with this product, any repairs attempted by anyone unauthorized by
Atlona to make such repairs, or any other cause which does not relate directly to a defect in materials and/or
workmanship of this product.
• Equipment enclosures, cables, power supplies, batteries, LCD displays, and any accessories used in conjunction
with the product(s).
• Products purchased from unauthorized distributors, dealers, resellers, auction websites and similar unauthorized
channels of distribution.
Disclaimers
This Limited Product Warranty does not imply that the electronic components contained within Atlona’s products
will not become obsolete nor does it imply Atlona products or their electronic components will remain compatible
with any other current product, technology or any future products or technologies in which Atlona’s products may
be used in conjunction with. Atlona, at its sole discretion, reserves the right not to extend its warranty oering in
instances arising outside its normal course of business including, but not limited to, damage inicted to its products
from acts of god.
Limitation on Liability
The maximum liability of Atlona under this limited product warranty shall not exceed the original Atlona MSRP for
its products. To the maximum extent permitted by law, Atlona is not responsible for the direct, special, incidental or
consequential damages resulting from any breach of warranty or condition, or under any other legal theory. Some
countries, districts or states do not allow the exclusion or limitation of relief, special, incidental, consequential or
indirect damages, or the limitation of liability to specied amounts, so the above limitations or exclusions may not
apply to you.
Exclusive Remedy
To the maximum extent permitted by law, this limited product warranty and the remedies set forth above are
exclusive and in lieu of all other warranties, remedies and conditions, whether oral or written, express or implied.
To the maximum extent permitted by law, Atlona specically disclaims all implied warranties, including, without
limitation, warranties of merchantability and tness for a particular purpose. If Atlona cannot lawfully disclaim
or exclude implied warranties under applicable law, then all implied warranties covering its products including
warranties of merchantability and tness for a particular purpose, shall provide to its products under applicable law.
If any product to which this limited warranty applies is a “Consumer Product” under the Magnuson-Moss Warranty
Act (15 U.S.C.A. §2301, ET SEQ.) or other applicable law, the foregoing disclaimer of implied warranties shall not
apply, and all implied warranties on its products, including warranties of merchantability and tness for the particular
purpose, shall apply as provided under applicable law.
Other Conditions
Atlona’s Limited Product Warranty oering gives legal rights, and other rights may apply and vary from country to
country or state to state. This limited warranty is void if (i) the label bearing the serial number of products have been
removed or defaced, (ii) products are not purchased from an authorized Atlona dealer or reseller. A comprehensive
list of Atlona’s authorized distributors, dealers and resellers can be found at www.atlona.com.
AT-OME-SR21
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Important Safety Information
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCT THE RISK OF
DO NOT OPEN ENCLOSURE OR EXPOSE
The exclamation point within an equilateral triangle is intended to alert the user to
the presence of important operating and maintenance instructions in the literature
accompanying the product.
The information bubble is intended to alert the user to helpful or optional operational instructions in the literature accompanying the product.
ELECTRIC SHOCK
TO RAIN OR MOISTURE.
NO USER-SERVICEABLE PARTS
INSIDE REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this product near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
8. Do not install or place this product near any heat
sources such as radiators, heat registers, stoves, or
other apparatus (including ampliers) that produce
heat.
9. Do not defeat the safety purpose of a polarized
or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding
type plug has two blades and a third grounding
prong. The wide blade or the third prong are
provided for your safety. If the provided plug does
not t into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked on
or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the
product.
11. Only use attachments/accessories specied by
Atlona.
12. To reduce the risk of electric shock and/or damage
to this product, never handle or touch this unit or
power cord if your hands are wet or damp. Do not
expose this product to rain or moisture.
13. Unplug this product during lightning storms or when
unused for long periods of time.
14. Refer all servicing to qualied service personnel.
Servicing is required when the product has been
damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the product, the product has been
exposed to rain or moisture, does not operate
normally, or has been dropped.
FCC Statement
FCC Compliance and Advisory Statement: This hardware 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. 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 in a commercial installation.
This equipment generates, uses, and can radiate radio frequency energy and, if not
installed or 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 o and on, the user is encouraged to try to correct the interference by one or more of the following
measures: 1) reorient or relocate the receiving antenna; 2) increase the separation between the equipment and the
receiver; 3) connect the equipment to an outlet on a circuit dierent from that to which the receiver is connected;
4) consult the dealer or an experienced radio/TV technician for help. Any changes or modications not expressly
approved by the party responsible for compliance could void the user’s authority to operate the equipment. Where
shielded interface cables have been provided with the product or specied additional components or accessories
elsewhere dened to be used with the installation of the product, they must be used in order to ensure compliance
with FCC regulations.
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Table of Contents
Introduction 8
Features 8
Package Contents 8
Panel Description 9
Installation 10
Captive Screw Connections 10
Mounting Instructions 11
Connection Instructions 12
IP Modes 13
Connection Diagram 13
WebGUI 14
Video Settings 15
Audio 17
Display 18
RS-232 20
Cong 21
System 22
HDBT 24
Appendix 25
Specications 25
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Introduction
The Atlona AT-OME-SR21 is an HDBaseT receiver and 4K/UHD scaler with a local HDMI input. Part of the Omega™
Series of integration products for modern AV communications and collaboration, the OME-SR21 receives HDBaseT
for video up to 4K/60 4:2:0, plus embedded audio, control, Ethernet, and USB over distances up to 330 feet (100
meters). The HDMI input supports video up to UHD/60 4:4:4. The OME-SR21 is HDCP 2.2 compliant and features
4K/60 upscaling and downscaling with frame rate conversion. Additionally, it receives USB over HDBaseT and
includes a USB 2.0 hub for integration with PCs, cameras, microphones, speakers, DSPs, and touch or interactive
displays. The OME-SR21 is ideal for 4K presentation applications with Omega, HDVS-200, or UHD-EX Series
transmitters, as well as Atlona AV presentation switchers with HDBaseT outputs, local HDMI sources, and the Gain™
Series ampliers.
The OME-SR21 combines the benets of 4K/UHD scaling, auto-switching for HDBaseT and HDMI inputs, integrated
display control, USB extension, and more. It incorporates many popular integration convenience features, while
delivering excellent performance and value for 4K presentation and video conferencing applications. The OME-SR21
can remotely power an Atlona HDBaseT transmitter through Power over Ethernet (PoE). For additional integration
convenience, the OME-SR21 features audio de-embedding, integrated two-port Ethernet switch, contact closure
ports for controlling a motorized screen or display lift, internal video test patterns for setup and troubleshooting, and
remote management with AMS (Atlona Management System).
Features
• 4K scaler for up and down scaling
• Dual LAN ports with integrated network switch to pass Ethernet and control to both unit and display
• Supports resolutions up to 4K/UHD 60Hz @ chroma sub-sampling 4:4:4, 4K HDR, Dolby Vision, and HLG
• HDCP 2.2 compliant
• Multiple control options such as RS-232, TCP/IP, webGUI, and front panel
• Multi-channel audio pass through up to Dolby Digital Plus™, Dolby® TrueHD, DTS-HD Master Audio™, and
Dolby Atmos®
• 2Ch audio de-embedding using the analog audio port
Package Contents
1 x AT-OME-SR21
2 x Captive screw connector, 5-pin
1 x Captive screw connector, 3-pin
4 x Mounting screws
1 x Wall/table mounting brackets
1 x 24V DC power supply
1 x IEC power cord
1 x Installation Guide
AT-OME-SR21
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Panel Description
1 2 3 4 5 7
PWR
LINK
L R
+
INPUT PATTERNDEVICE IP
+
OUTPUT
OMEGA
TM
TM
HDBaseT IN
10
1 PWR LED
Illuminates green when receiving power.
2 DEVICE IP button
Press to display the unit IP in the top left corner of
the connected display.
3 INPUT button
Use to switch between the HDMI and HDBaseT
inputs. If the device is currently showing a pattern for
source, pressing the input button will bring up the last
selected input.
4 PATTERN button
Use to send one of the three source patterns built
into the unit. Press to cycle through all three patterns.
5 HDMI IN
Connect an HDMI cable from an HDMI source to this
port.
6
USB HUBOMEGA
98
IP MODE
1
2
LAN DC 24VRELAY
1311 12 15 16 17
RESET RS-232
14
1 2
RX RXTX TX
C1 COM C2
10 HDBaseT IN
Connect a compatible HDBaseT transmitter to this
port.
11 AUDIO OUT
Connect to an audio DSP, amplier, or other audio
distribution devices.
12 HDMI OUT
Connect an HDMI cable from here to an HDMI
display.
13 LAN
Connect Ethernet cables to these ports for control of
the unit and/or to pass Ethernet to a local device.
14 RESET button and LED
Press and hold the button for 5 seconds until the unit
resets. The LED will blink as the unit resets to factory
default settings.
AT-OME-SR21
HOST USBHDMI IN
AT-OME-SR21
6 USB HUB
Connect USB devices to these ports. e.g. usb
camera, mouse, etc.
7 HOST USB
Connect to a computer using a USB B to USB A
cable.
8 LINK LED
Illuminates yellow when receiving signal from the
HDBaseT input port.
9 IP MODE button and LED
Press and hold the button for 5 seconds until the LED
blinks to switch the IP mode between DHCP and
Static IP modes. The LED will blink 2 times for DHCP
and 3 times for static IP.
15 RS-232
Use for device and display control.
16 RELAY
Dual low-voltage signal relay to control devices such
as electric screens and display lifts.
17 DC 24V
Connect the included DC 24V power supply to this
port.
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Installation
L R
L R
C2C1 COM
Open
Closed
Captive Screw Connections
RS-232
A 5-pin captive screw connector has been included for RS-232.
NOTE: Port 1 will control the display and port 2 is for unit control.
GNDRX TX
GND RX
TX
Audio
Connect to an audio DSP, amplier, or other audio distribution devices.
Use a jumper between the negative and ground pins
when using an unbalanced connection.
+
+
-
Negative
Positive
Ground
Balanced
-
Negative
Positive
+
+
Positive
Positive
Ground
Unbalanced
Relay
Pin out will be determined by the RS-232
cable and connect as RX (receive), TX
(transmit) and (Ground). Ground will be
shared between port 1 and port 2.
A dual low-voltage signal relay is built into the OME-SR21 for control of devices such as electric screens and display
lifts. A 3-pin captive screw connector has been included for connection.
There are 3 connections for the relay: C1, COM, and C2 (Circuit 1,
Common, and Circuit 2.)
When using a dual signal relay with an electric projection screen, it
allows for two dierent circuits to be controlled: up and down
(pictured to the right).
The relay will default to follow the display. When the unit turns on the
C1
Closed
C1
Down
COM
Up
COM
C2
Open
C2
relay will close C1 and open C2. When the display is turned o and
signal is no longer being received C1 will open and C2 will close.
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Installation
Mounting Instructions
The AT-OME-SR21 includes two mounting brackets and four mounting screws, which can be used to attach the units
to any at surface.
1. Remove the top 2 case screws on the side of the unit.
2. Align the mounting brackets to the side of the units.
3. Use the previously removed case screws to secure the mounting bracket to the enclosure.
4. Repeat the steps for the other side of the unit.
AT-OME-SR21
C1 COM C2
1 2
RX RXTX TX
IP MODE
RESET RS-232
2
LAN DC 24VRELAY
HDBaseT IN
L R
+
+
OUTPUT
1
AT-OME-SR21
HOST USBHDMI IN
USB HUB
INPUT PATTERNDEVICE IP
OMEGA
OMEGA
PWR
LINK
TM
TM
5. Mount the unit using the oval-shaped holes, on each mounting bracket. If using a drywall surface, a #6 drywall
screw is recommended.
NOTE: Mounting brackets can also be inverted to mount the unit under a table or other at surface.
AT-OME-SR21
C1 COM C2
1 2
RX RXTX TX
IP MODE
RESET RS-232
2
LAN DC 24VRELAY
HDBaseT IN
L R
+
+
1
OUTPUT
AT-OME-SR21
HOST USBHDMI IN
USB HUB
AT-OME-SR21
OMEGA
OMEGA
INPUT PATTERNDEVICE IP
PWR
LINK
TM
TM
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Installation
Cable Recommendation Guidelines
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.
Core Shielding
Solid UTP
(unshielded)
STP (shielded)
Performance Rating (MHz) 350 500 600 800
IMPORTANT: Stranded or patch cables are not recommended due to performance issues.
Cable Max. Distance @ 4K
CAT5e 295 feet (90 meters) 330 feet (100 meters)
CAT6 / CAT6a / CAT7 330 feet (100 meters) 330 feet (100 meters)
Use of a TIA/EIA 568B termination
is recommended for optimal
performance.
Connection Instructions
1. Connect an HDMI source to the HDMI IN port.
CAT5e CAT6 CAT6a CAT 7
N/A
Max. Distance @ 1080p
2. Connect a compatible HDBaseT transmitter (e.g. AT-OME-ST31 or AT-OME-EX-TX) to the HDBaseT input port
using a category cable.
3. Connect an HDMI cable from the output port to an HDMI display.
4. *Optional* Connect the 2CH analog AUDIO OUT ports to a DSP, or audio amplier.
5. *Optional* Connect USB devices (e.g. USB camera) to the USB hub ports.
6. *Optional* Connect the HOST USB port to a computer using a USB B to USB A cable (cable not provided).
7. *Optional* Connect to the 5-pin captive screw RS-232 port to control the display (port 1) and the unit (port 2).
8. *Optional* Connect a network switch to one of the LAN ports, for IP control, system conguration, or Ethernet
routing.
9. *Optional* Connect a second Ethernet cable from the second LAN port to the local display to pass through
Ethernet.
10. *Optional* To control devices such as electric screens and display lifts, connect the device to the 3-pin captive
screw relay port.
11. Connect the included DC 24V power supply to the power port.
12. Connect the included IEC power cord from the power supply to a compatible power outlet.
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Installation
IP Modes
DHCP
By default, the AT-OME-SR21 is set to DHCP mode. In this mode, when the AT-OME-SR21 is connected to the
Local Area Network (LAN), it will automatically be assigned an IP address by the DHCP server (if available). Press the
DEVICE IP button to show the IP address in the top left corner of the display.
Static
If no DHCP server is available, or a static IP is required, the OME-SR21 can be set to static IP mode using the IP
mode button.
• Press and hold the IP MODE button for 5 seconds to switch to static IP mode, the LED will blink 3 times when it
goes into Static IP mode. In this mode, the AT-OME-SR21 will be set to the following:
IP address: 192.168.1.254
Subnet mask: 255.255.0.0
Gateway: 192.168.1.1
• To switch back to DHCP, press and hold the IP mode button for 5 seconds. The LED will blink 2 times when
successfully put into DHCP mode.
Connection Diagram
RX RXTX
HDBaseT OUT
AT-OME-EX-TX
RS-232 IR
AT-OME-EX-TX
HDMI
USB
HDMI IN
4
Media Player
Network Switch
Laptop
f
4
.
0
7
.
3
m
F
m
-
6
-
.
f
1
F
4
7
m
m
m
o
o
Z
X
0
1
m
m
1
7
0
X
4
f
Z
o
-
o
0
m
.
3
F
F
-
1
6
HDBaseT
USB HUB
Ethernet
USB
AT-OME-SR21
HOST USBHDMI IN
AT-OME-SR21
C1 COM C2
1 2
RX RXTX TX
HDMI
media4
+
L R
+
OUTPUT
HDBaseT IN
Ethernet
IP MODE
RESET RS-232
2
LAN DC 24VRELAY
1
AT-OME-SR21
INPUT PATTERNDEVICE IP
PWR
LINK
TM
TM
OMEGA
OMEGA
HDMI
.
AT-HDVS-CAM
AT-OME-SR21
Display
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WebGUI
The AT-OME-SR21 includes a built-in webGUI, which allows easy remote management and control of all features.
Follow the instructions below to access the webGUI.
1. Make sure that an Ethernet cable is connected between the LAN port on the AT-OME-SR21 and the network.
2. Press the DEVICE IP button on the front panel to display the IP address of the unit in the top left corner of the
connected display.
3. Launch a web browser and enter the IP address in the address bar.
4. The AT-OME-SR21 Login page will be displayed.
5. Enter the following information on the Login page.
Login: admin
Password: Atlona
6. Click the Login button. The info page will display, giving all the general information of the AT-OME-SR21.
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Video Settings
Select Video from the top navigation to adjust routing and video settings.
webGUI
Prefer Timing
HDBaseT/HDMI - Select the source resolution to be passed. Options are: Native, 1280x800, 1920x1080,
1024x768, 1280x720, 1920x1200, 1366x768, 800x600, 1600x900, 2560x1440, 3840x2160, and 1440x900. Na-
tive will allow the EDID handshake to determine the correct resolution for the source.
HDCP Settings
On - Sets the HDCP of the HDMI or HDBaseT ports to auto, allowing HDCP to switch between compliant and
non-compliant according to the source and display HDCP handshake status.
O - Sets the HDBaseT or HDMI port to HDCP non-compliant. No HDCP compliant source signals will pass in
this mode.
NOTE: Some sources ag all content as protected, by selecting HDCP o the source device may send
only user created content. In some cases, the source must be congured to send content to non-HDCP
devices (e.g. HDCP must be turned o within a PS4’s settings to pass unprotected content).
Auto Switch
Auto Switch mode - Set switching to auto (on) to have the source change when detecting new signal or the
currently selected source is no longer sending signal.
Fallback Input - Select whether the unit will auto switch to the last signal detected before the current input
signal stopped (Previous) or set it to return to a specic input.
Fallback Time (Sec.) - Set the amount of time in seconds between loss of signal and the input falling back to the
selected port.
AT-OME-SR21
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webGUI
Output
Input Selection - Use the drop down menu to switch between A/V Mute (no signal), HDMI, HDBaseT, internal
pattern 1, internal pattern 2, and internal pattern 3 source signals.
Scaler Pass-Through - When enabled (on), the unit will pass the highest common resolution between source
and display. When disabled (o), the unit will pass the selected output video format and aspect.
Format - Select the resolution the output will scale to from the drop down menu.
Aspect - Select between Fill (will adjust the video to completely ll the selected Format, no matter the aspect
ratio of the display) or Follow (will display the resolution in the aspect ratio of the display).
Overscan
Enable - Allows for the adjustment of H Size and V Size when enabled. H Size and V Size will be greyed out
and inoperable when disabled.
H Size and V Size - Adjust the vertical and horizontal size of the image manually using these sliders.
Picture
Brightness - Adjusts the output brightness from 0 to 100. Default is 30
Contrast - Adjusts the output contrast from 0 to 100. Default is 30
Saturation - Adjusts the output saturation from 0 to 100. Default is 30
Hue - Adjusts the output hue from 0 to 100. Default is 30
Sharpness - Adjusts the output sharpness from 0 to 100. Default is 30
Reset Pictures - Use the Reset all Pictures button to set the picture settings back to default.
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Audio
Select Audio from the top navigation to adjust volume, mute status, and EQ levels.
webGUI
Output Audio
Mute On/O - Mute and unmutes all audio output signals.
HDMI / L/R On - Unmutes the audio output signal, allowing audio to pass through the outputs.
HDMI / L/R O - Mutes the audio output signal of the ports. No audio will pass when selected.
NOTE: HDMI muting will mute the audio embedded on the HDMI output and L/R muting will mute the
audio on the analog audio output.
Output Volume
Volume bar - Adjusts the master volume output of the unit from -80 to 0. Default is 0.
EQ Level
Level Sliders - Use the slider to adjust between level -12 and 15 on each band. Default is 0.
AT-OME-SR21
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Display
Select Display from the top navigation to adjust display control settings.
webGUI
CEC
Command: Power - Press to send the CEC power on or o command out through the HDMI port.
Command: Volume - Press to send the CEC Volume up, down, or mute commands through the HDMI port.
System Settings
Display Auto Power On - Sets the unit to send the display power on command to the output, after the power on
delay timer, when signal is received.
Display Auto Power O - Sets the unit to send the display power o command to the output when signal is no
longer received for the set auto power o time.
Lamp cool down timer - Sets the time between when the display is turned o and when the next command can
be sent.
Auto power o timer - Sets the time between when the last signal was receieved and the display power o
command is sent.
Power on delay timer - Sets the amount of time between when the display is turned on to when the unit sends
any commands.
Control Type - Selects which command type is used to send commands and what type of control signal is sent
when the command is triggered. Options are CEC, TCP/IP or RS-232.
Feedback Verify - Enable (on) or disable (o) feedback verication to a control system or hyper terminal.
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webGUI
TCP/IP Settings of Controlled Device
IP Mode - Toggle telnet login mode between Non-Login and Login. If set to Login, a username and password
will be required to control the unit via TCP/IP.
IP Address - Sets to the IP of the controlled device/display.
Port - Set the port of the controlled device for control. Default is 23.
Username & Password - Sets the username and password that is required when login mode is enabled.
RS-232 / IP Display Commands
Send Mode - Switch command format between ASCII and HEX.
Set Command - Type in the command found within the display’s manual.
Termination Drop Down - Select the command termination type. The options are: None, CR (carriage return),
LF (line feed), CR-LF (carriage return and line feed), Space, STX (start-of-text character), ETX (end-of-text
character), and Null (null character/binary zero).
Feedback - Provide the feedback found within the display’s manual.
Test - Use this button to send the command to the display, to ensure the commands are correct.
Save - Save the commands to the device memory.
Load Parameters - Press this button to revert to the saved settings, if edits were made but not saved to the
commands. e.g. If the ON command is accidently erased and the save button hasn’t been pressed, select
Load Parameters to make the command return.
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RS-232
Select RS-232 from the top navigation to adjust the zone control parameters for the RS-232 port.
webGUI
RS-232 Parameter Setting
RX RS232 1 - Select the baud rate, data bit, parity, and stop bit to match the SR21’s parameters. Defaults are
9600, 8, None, and 1.
RX RS232 2 - Select the baud rate, data bit, parity, and stop bit to match the display’s parameters. Defaults are
115200, 8, None, and 1.
HDBaseT - Select the baud rate, data bit, parity, and stop bit to match the transmitter’s parameters. Defaults
are 115200, 8, None, and 1.
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Cong
Select Cong from the top navigation to adjust user settings.
Users
Admin Password - Update the admin password for the switcher. Only the admin password may be changed,
the username will remain admin.
Additional Users - Add up to three additional users, each with individual passwords.
webGUI
NOTE: The passwords cannot contain any special characters. e.g. !@#$%/^&*\?+-;’”.
Add/Edit a user:
• Select the Add/Edit button. A pop up will appear.
• Type in the new/updated username and/or password.
• Press the Save Change button.
NOTE: Added users will have access to all the same options as the administrator, except for username
and password changes. Only the password and username of the logged in user can be altered.
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System
Open
Closed
Select System from the top navigation to adjust relay, network, or system options.
Relay
Control - Set the relay to either follow the display’s status (on: c1-close c2-open, o: c1-open c2-close) or be
manually set using the selectors in the webGUI.
Relay - When the relay is set to manual, select the sliders to open and close the com ports.
Type - Switch between pulse and closed relay type.
Pulse Time - Sets the time between each pulse in seconds. Range is 1 to 30. Default is 1.
webGUI
NOTE: When the unit is set to pulse, the relay will latch for the designated pulse time before opening
again. The relay that opens and closes will be determined by the power state.
Power on
Relay 1: Latch will close for designated pulse time then open.
Relay 2: Relay will remain open.
Power O
Relay 1: Relay will remain open.
Relay 2: Latch will close for designated pulse time then open.
When using a dual signal relay with an electric projection screen, it
allows for two dierent circuits to be controlled: up and down
(pictured to the right).
The relay will default to follow the display. When the unit turns on the
C1
Closed
C1
Down
COM
Up
COM
C2
Open
C2
relay will close C1 and open C2. When the display is turned o and
signal is no longer being received C1 will open and C2 will close.
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webGUI
Network
MAC Address - Displays the MAC address of the unit.
IP Mode - Switch between static and DHCP IP modes.
IP, Netmask, Gateway - This will display the unit’s current DHCP IP settings. When set to static, ll in the IP
address, netmask, and gateway.
Telnet Port - Set the telnet port if needed for control. Default port is 23.
Telnet Login Mode - Toggle telnet login mode on and o. If on, a username and password will be required to
control the unit via telnet.
Telnet Timeout - Set the amount of time between actions before the current user is logged out. Default is 10000
seconds.
Status Broadcast - Toggle to set the Broadcast mode ON or OFF. This provides feedback for control system
use.
Brute Attack - Adds a layer of security to prevent users from attempting to login with incorrect credentials.
• Maximum Retry Connection: Select the number of login attempts that are allowed before the system locks
out the username. Default is 10.
• System Lock Time: Select the system lock-out time in minutes. Default is 3.
Hostname - Set the name for the matrix, this will show up in network discovery.
System
Lock - Lock or unlock the front panel buttons.
Reset to Default- Press the Factory Default button to set the unit back to all factory settings, including IP mode.
Firmware update - Use the choose le button to search the local PC for the rmware le. Once selected, press
the update button to start the rmware update.
NOTE: Firmware updates and release notes can be found at https://atlona.com/product/AT-OME-SR21/ .
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webGUI
HDBT
Select HDBT to open the HDBaseT cable test page. This page will check extender versions, cable status and length,
and Video Quality.
HDBT Test
HDBaseT Zone - Use the drop down menu to select which HDBaseT input is being tested. Only active
connections can be tested.
Start/Stop - Use the start/stop button to run or cancel the HDBaseT signal testing. The webGUI will remain
active until the testing stops.
TX / RX Version - When the test starts, the chipset version will display. AT-OME-SR21 (RX) will be VS2310.
TMDS Clock - After the test has been initiated, it will display the TMDS clock frequenzy in Mhz.
Cable Length - An approximate HDBaseT cable length will be displayed here after the test has been started.
Video Quality (Video BER) - Will display pass or fail depending on if the cable video signal quality.
Cable Quality - Each pair will be tested and return a pass or fail status.
Failure:
One or more Pairs - Reterminate the cable.
Of BER and any pairs - Replace the cable.
Of one or more pairs after retermination - Replace the cable.
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Appendix
Specications
Video
HDMI 2.0
HDCP 2.2
UHD/HD/SD 4096x2160@602/50/30/25/24Hz, 3840×2160@602/50/30/25/24Hz, 1080p@60/5
9.9/50/30/29.97/25/24/23.98Hz, 1080i@30/29.97/25Hz, 720p@60/59.94/50Hz,
576p@50Hz, 576i@25Hz, 480p@60/59.96Hz, 480i@30Hz
VESA 2560×1600, 2048×1536, 1920×1200, 1680×1050, 1600×1200, 1440×900,
1400×1050, 1280×1024, 1280×800, 1366×768, 1360×768, 1152×864, 1024×768,
800×600, 640×480
Scaler Up/Down 1024x768p60, 1280x720p50, 1280x720p60, 1280x768p60, 1280x800p60,
1360x768p60, 1600x1200p60, 1920x1080p24, 1920x1080p25, 1920x1080p50,
1920x1080p60, 1920x1200p60, 2048x1080p60, 3840x2160p24, 3840x2160p25,
3840x2160p30, 3840x2160p50, 3840x2160p60, 4096x2160p24, 4096x2160p25,
4096x2160p30, 4096x2160p50, 4096x2160p60
Color Space YUV, RGB
Chroma Subsampling 4:4:4, 4:2:2, 4:2:0
Color Depth 8-bit, 10-bit, 12-bit
Audio
HDMI Pass-Through Formats PCM 2.0, LPCM 5.1, LPCM 7.1, Dolby® Digital, Dolby Digital Plus™, Dolby
TrueHD, Dolby Atmos®, DTS® Digital Surround™, DTS-HD Master Audio™, and
DTS:X®
Bit Rate 24 Mbits/s max
Analog Audio
Format Stereo 2-Channel
Balanced Output +4 dBu nominal gain, +20 dB headroom
Frequency Response 20 Hz to 20 kHz, ± 0.5 dB
Impedance 150 Ω
Stereo channel separation > 90 dB
THD+N < 0.03% at 20 Hz to 20 kHz
SNR > 90 dB at 1 kHz, zero clipping @ 0 dBFS, unweighted
EQ 5 band, 63Hz, 85Hz, 250Hz, 1kHz, 4kHz
Sample Rate 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz
USB
Signal 2.0
Type A - Power 2.5 W per port
Maximum Data Rate 120 Mbps
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Control
RS-232 1-way connected display control
2-way device control and monitoring
Supported baud rates: 2400, 4800, 9600, 19200, 38400, 57600, 115200
IP Full duplex 100Mbps
CEC Support Yes
Relay Normally open (NO), adjustable Toggle and Pulse modes
Electrical rating: 48V@1A
Resolution / Distance 4K/UHD - Feet / Meters 1080p - Feet / Meters
HDMI IN/OUT 15 5 30 10
CAT5e 295 90 330 100
CAT6/6a/7 330 100 330 100
Connectors, Controls, and Indicators
HDMI IN 1 - Type A, 19-pin female
HDBaseT IN 1 - RJ45, female
HDMI OUT 1 - Type A, 19-pin female
USB HUB 2 - Type A, 4-pin female
USB HOST 1 - Type B, female
AUDIO OUT 1 - 5-pin captive screw, balanced / unbalanced 2-channel
RELAY 1 - 3-pin captive screw
RS-232 2 - 3-pin captive screw (bidirectional)
LAN 2 - RJ45, 100Base-T
DC 24V 1 - 4-pin, mini-DIN locking connector
PWR indicator 1 - LED, green
LINK indicator 1 - LED, yellow
Control Buttons:
DEVICE IP, INPUT, PATTERN
IP MODE, RESET
Function Indicators:
IP MODE, RESET 2 - LED, green
3 - momentary, tact-type
2 - momentary, recessed
Appendix
Temperature Fahrenheit Celsius
Operating 32 to 122 0 to 50
Storage -4 to 140 -20 to 60
Humidity (RH) 20% to 60%, non-condensing
Power
Consumption 17.6 W (wattage may vary by up to 5W when powering external USB devices)
Supply Input: 100 - 240 V AC, 50/60 Hz
Output: 24 V / 2.7A DC
Dimensions Inches Millimeters
H x W x D 1.02 x 8.62 x 5.98 26 x 219 x 152
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Weight Pounds Kilograms
Device 1.96 0.89
Certication
Device CE, FCC, UL
Appendix
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Toll free US International
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