Three-Input Switcher and HDBaseT Transmitter for USB-C and HDMI Video

Three-Input Switcher and HDBaseT Transmitter for USB-C and HDMI Video

AT-OME-ST31A

  • 3×1 HDBaseTTM switcher with USB-C® and HDMI® inputs
  • USB-C input for AV and device powering (does not support data)
  • Mirrored HDBaseT and HDMI outputs
  • Designed for remote powering over HDBaseT
  • Local powering available with optional AT-PS-245-D4 power supply
  • 4K/UHD capability @ 60 Hz with 4:4:4 chroma sampling (local ports)
  • Automatic input selection and automatic display control
  • Audio de-embedding
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Low-Profile AV Switcher, Uniquely Versatile

USB-C and HDMI video inputs.

For connecting the latest laptops, you’re all covered.

Learn More

Supports 4K/60 with 1080p downscaling.

No need to worry about backward incompatibility.

Learn More

Flexible powering.

Power an under-table OME-ST31A over HDBaseT, or locally.

Learn More

Additional Features

The Atlona AT-OME-ST31A is a compact yet versatile 3×1 switcher and HDBaseT transmitter with USB-C and HDMI video inputs, and mirrored HDMI and HDBaseT outputs. The OME-ST31A is part of the Omega™ Series of integration products for modern AV communications and collaboration.

Display control & automation

The OME-ST31A conveniently provides automatic source switching and display on/off powering based on input signal detection, such as when a laptop is connected or disconnected.

Local and long distance outputs

Two simultaneous outputs are included. One is for a local HDMI display, while the other is for extending video over HDBaseT up to 330 feet (100 meters) to a remote location.

Audio de-embedding to balanced stereo output

The OME-ST31A de-embeds stereo audio from any input source to feed into an amplifier and speakers.

Integrated HDBaseT link monitoring

A built-in, powerful tool provides quick performance validation, as well as troubleshooting to check for integrity of the cable link between the OME-ST31A and HDBaseT receiver.

Details

The Atlona AT-OME-ST31A is a 3×1 switcher and HDBaseT transmitter designed for remote powering, with USB-C and HDMI inputs. The OME-ST31A features two-channel audio de-embedding to an analog balanced audio output. Part of the Omega™ Series of integration products for modern AV communications and collaboration, the OME-ST31A features mirrored HDMI and HDBaseT outputs and is HDCP 2.2 compliant. The USB-C input is ideal for AV interfacing with newer Mac®, Chromebook™, and Windows® PCs, as well as smartphones and tablets. Video signals up to 4K/60 4:2:0, plus embedded audio, control, and Ethernet 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 @ 60, 30, or 24 Hz 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. See the Related Products tab for specific product compatibility.

All-in-One Switcher, Controller, and Extender

This switching transmitter can serve as an integral component of a fully automated AV system, with the convenience of automatic input selection and display control. It can be remotely powered by Atlona HDBaseT-equipped devices. With the optional AT-PS-245-D4 power supply, the OME-ST31A can charge laptops and mobile devices through the USB-C port. For additional integration convenience, the OME-ST31A features TCP/IP and RS-232 control, RS-232 insertion over HDBaseT, and remote management with Velocity Device Manager.

Automatic Display Control

The OME-ST31A provides control to a display through TCP/IP, RS-232, or CEC*, without the need for a separate control system. This simplifies system design and integration while reducing costs. With automatic display control, the OME-ST31A can trigger a display to power on automatically whenever a laptop or other device is connected. At the end of the presentation, when the presenter disconnects the laptop, the OME-ST31A forces the display to power off. Ease of presenter interaction with the system, and the savings incurred by automatic display shutdown provide a significant return on investment. The OME-ST31A display control capability can also be triggered by an external control system.

* Consumer Electronics Control (CEC): Atlona does not guarantee the function of CEC with all televisions. We can confirm proper operation with many current Samsung, Panasonic, Sony, and LG TVs. Many manufacturers do not support the CEC “off” command when sent from a source and older TVs use proprietary commands. Atlona only supports those TVs that follow CEC command structure from HDMI 1.2a and support the “off” command when issued by a source. We encourage any dealer to get evaluation product from Atlona prior to designing a system around this control technology or be prepared to use other methods to control their displays if Atlona CEC is not compatible with the installed displays.

Reliable Auto-Switching

The OME-ST31A automatically selects an input source based on detection of the 5 volt hot plug detect (HPD) signal, as well as active video. This ensures reliable auto-switching operation for all video sources, including DVRs, DisplayPort / Mini DisplayPort adapters, and other devices that always maintain the HPD line at the 5 volt “high” state but may not be delivering active video.

Applications

  • Complete system integration – The OME-ST31A and a compatible HDBaseT receiver provide a compact, yet comprehensive and cost-effective integration solution. When installed below a meeting table, the available Pocket™ 3H (AT-PKT-3H) provides convenient tabletop AV cable access for easy BYOD connectivity.
  • Larger system applications – The OME-ST31A is ideal for extending AV connectivity from a central equipment rack to a meeting table or lectern, where presenters can easily access the system.
  • Auditoriums and lecture halls – This switcher can be used for presenting 4K video content through the projector, while also optimizing for a 1080p confidence monitor.

Product compatibility

The AT-OME-ST31A is ideal for 4K/UHD extension to the AT-UHD-EX-100CE-RX-PSE receiver, and can also provide remote 4K/UHD input switching for Atlona HDBaseT-equipped switchers and matrix switchers. Additionally, the AT-OME-ST31A is compatible with the AT-HDVS-200-RX receiver and HD scaler, and the AT-HDVS-SC-RX receiver and 4K/UHD scaler.

The AT-OME-ST31A is available as the AT-OME-ST31A-KIT with the AT-UHD-EX-100CE-RX-PSE.

See below for a complete listing of compatible products.

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Technical Features

3×1 HDBaseT switcher with USB-C and HDMI inputs

  • USB-C and two HDMI inputs
  • Immediate compatibility with laptops and tablets with USB-C ports supporting AV*
  • No need to provide USB-C to HDMI video adapters
  • * USB-C port supports AV and device charging (with optional AT-PS-245-D4 power supply), but not USB data.

Mirrored HDBaseT and HDMI outputs

  • Local and long-distance video outputs provide flexible options for AV system designs and applications

Video, audio, power, and data over category cable utilizing HDBaseT technology

  • Transmits 4K/UHD video up to 330 feet (100 meters) with CAT6/6a/7 cable, or up to 295 feet (90 meters) using CAT5e cable
  • Uses easy-to-integrate category cable for low-cost, reliable system installation

4K/UHD capability @ 60 Hz with 4:4:4 chroma sampling on local ports (HDMI and USB-C), plus support for HDR formats

  • HDBaseT output supports 4K/UHD @ 60 Hz with 4:2:0 chroma subsampling
  • HDMI and USB-C inputs, and HDMI output are compatible with 4K HDR10 @ 60 Hz and Dolby Vision™ @ 60 Hz, as well as HLG (Hybrid Log-Gamma) for 60p HDR broadcast services

HDCP 2.2 compliant

  • Adheres to latest specification for High-bandwidth Digital Content Protection*
  • Allows protected content stream to pass between authenticated devices
  • * HDBaseT receiver or switcher must also be HDCP 2.2 compliant.

Selectable 4K to 1080p downscaling

  • Integrated video processing available for down-converting 4K/UHD @ 60, 30, or 24 Hz to 1080p
  • Downscaling can be bypassed to allow pass-through up to 4K/60 4:4:4 and 4K HDR
  • Ideal for applications with 1080p displays, video conferencing codecs, and other HD sink devices

Remote powering over HDBaseT or local powering

  • Industry standard IEEE 802.3af PoE is supplied by an Atlona receiver or switcher over HDBaseT
  • Allows convenient switcher installation at a table or other remote location, without the need for local AC power
  • Also can be locally powered by the optional AT-PS-245-D4 power supply – to charge a USB-C mobile device

Automatic display control

  • Automatically changes display power state based on active or standby mode of the switcher. Control signals to display are transmitted via IP, RS-232, or CEC.
  • Enables display and volume control. CEC enables control of consumer displays (as supported by the display manufacturer).
  • Includes an adjustable lamp cooldown mode to avoid prematurely powering up a projector after shutdown
  • Eliminates the need for a complex AV control system

Automatic input selection using hot plug detect and video detection technology

  • Selects active input when sources are connected or if there is a change in source power status
  • Enables simplified, automatic system operation without user intervention

Audio de-embedding

  • De-embeds two-channel source audio into an analog balanced audio output

Multi-channel audio compliant

  • Passes through multi-channel audio formats from the HDMI or USB-C inputs
  • Supports PCM, Dolby® Digital, Dolby Digital Plus™, Dolby TrueHD, Dolby Atmos®, DTS® Digital Surround™, DTS-HD Master Audio™, and DTS:X®

EDID management

  • Manages EDID communications with the source through a display’s EDID or internally stored EDID
  • Ensures desired audio formats and video resolutions are provided to the AV system

HDCP management

  • Automatically reports HDCP compliance status to the source based on the sink device
  • Allows non-protected material from PCs to pass to non-compliant displays, streaming devices, and teleconference systems; protected content is not transmitted
  • Displays a green splash screen as visual confirmation that protected content is being blocked from transmission to a non-compliant display

Integrated HDBaseT link status monitoring

  • Tests integrity of the HDBaseT cable link between the transmitter and the receiver
  • Web GUI provides real-time link status
  • Quick, easy verification or troubleshooting of RJ-45 termination or twisted pair cable quality

Intuitive GUI-based configuration using integrated web server

  • Offers menu-based configuration of device settings including network access, input switching, signal processing, display control, HDCP and EDID management, and more
  • Allows fast configuration of internal product settings and troubleshooting from a mobile device or PC in the field

TCP/IP and RS-232 control

  • Flexible control options for compatibility with the Atlona Velocity™ control system, as well as other third-party control systems
  • Reduces integration time and costs

Easy to configure and manage with Velocity Device Manager

  • Centralized, network-based configuration and management of Atlona IP-controllable products and systems
  • Manage configuration and firmware updates for AV devices spanning a facility, building, enterprise, or residence
  • Available as a part of Velocity control systems or as a free virtual machine software download

Field-updatable firmware

  • Device can be updated in the field via the web GUI or Velocity Device Manager
  • USB port also available for firmware updates

Front panel power and signal status LEDs

  • LED indicators provide power, HDBaseT link, and input selection status information
  • Provides local, convenient setup and troubleshooting when network access is not available

Low-profile, 1.02 inch (26 mm) high enclosure

  • Easy installation into confined spaces below tables and in furniture

Included accessories

  • Installation guide, surface mounting hardware, and 2 meter (6.5 foot) USB-C male-to-male cable (USB 3.1 Gen 1)

Product Warranty

Specifications

Video
HDMI Specification HDMI 2.0(1); HDCP 1.4, 2.2
UHD/HD/SD 4096×2160 (DCI) @ 60(1)/30/25/24 Hz
3840×2160 (UHD) @ 60(1)/30/25/24 Hz
1080p @ 60/59.9/50/30/29.97/25/24/23.98 Hz
1080i @ 60/59.94/50 Hz
720p @ 60/59.94/50 Hz		 720x576p @ 50 Hz
720x576i @ 50 Hz
640x480p @ 60/59.96 Hz
640x480i @ 60 Hz
VESA 2560×1600 @ 60 Hz
2048×1536 @ 60 Hz
1920×1200 @ 60 Hz
1680×1050 @ 60 Hz
1600×1200 @ 60 Hz
1440×900 @ 60 Hz
1400×1050 @ 60 Hz
1280×1024 @ 60 Hz		 1280×800 @ 60 Hz
1366×768 @ 60 Hz
1360×768 @ 60 Hz
1152×864 @ 60 Hz
1024×768 @ 60 Hz
800×600 @ 60 Hz
640×480 @ 60 Hz
Scaler (HDMI Output)(2) IN OUT
4K @ 24 Hz
4K @ 30 Hz
4K @ 60 Hz, 4:2:0		 1080p @ 24 Hz
1080p @ 30 Hz
1080p @ 60 Hz (YUV/RGB, 4:4:4)
Scaler Pass-Through (HDMI Output) 4K @ 60 Hz 4K @ 60 Hz
USB-C® Up to 4K/UHD @ 60Hz
Color Space YUV, RGB
Chroma Subsampling 4:4:4, 4:2:2, 4:2:0
Color Depth 8-bit, 10-bit, 12-bit
HDR HDR10, Hybrid-Log Gamma (HLG), and Dolby® Vision™ @ 60Hz; HDMI and USB-C ports only
Audio
Pass-Through Formats PCM
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®
Sample Rate 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz
Bit Rate 24 Mbits/s max
Analog Audio
Format 2-channel stereo
Balanced Output +4 dBu, nominal gain; +20 dBu headroom
Frequency Response 20 Hz to 20 kHz, ±0.5 dB
THD+N < 0.004% @ 20 Hz to 20 kHz
SNR > 105 dB @ 1 kHz, zero clipping @ 0 dBFS, unweighted
Protocols
Supported HTTP, Telnet
Addressing DHCP, static
Authentication IEEE 802.1x: PEAP/MSCHAPv2 or EAP-TLS
Control
RS-232 Device control and configuration; supports baud rates from 2400 to 115200
IP Device control and configuration
CEC Device control and configuration
Connectors
HDMI IN 2 – Type A, 19-pin female
HDMI OUT 1 – Type A, 19-pin female
USB-C 1 – USB Type-C v3.1, 24-pin female
HDBaseT OUT 1 – RJ45
LAN 1 – RJ45, 10/100/1000 Mbps
RS-232 1 – 3-pin captive screw (bidirectional)
AUDIO OUT 1 – 5-pin captive screw, balanced/unbalanced, 2-channel
DC 24V 1 – 4-pin, locking
USB
USB-C Device Charging Capability 60 W @ 20 V / 3 A, 36 W @ 12 V / 3 A, and 15 W @ 5 V / 3 A
Controls and Indicators
INPUT, DISPLAY 2 – momentary, tact-type
IP MODE, RESET 2 – momentary, tact-type, recessed
PWR indicator 1 – LED, green
LINK indicator 1 – LED, yellow
INPUT indicators: 1,2,3 3 – LED, green
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
Signal
Maximum TMDS Clock 600 MHz (300 MHz over HDBaseT)
HDBaseT 10 Gbps
Power
Consumption 101.5 W (with USB charging)
24.2 W (without USB charging)
External Power Supply (optional)
AT-PS-245-D4		 Input: 110 – 220 V AC, 50/60 Hz
Output: 24 V DC, 3 A
Safety: FCC, RCM, cULus, CE, RoHS
Environmental
Operating Temperature +32 to +113 °F
0 to +45 °C
Storage Temerature -4 to +140 °F
-20 to +60 °C
Operating Humidity (RH) 20% to 95%, non-condensing
Dimensions (H x W x D) Inches Millimeters
Unit 1.02 x 8.62 x 5.98 26 x 219 x 152
Power Supply 1.6 x 2.6 x 6.2 40.6 x 66 x 157.4
Chassis
Weight 1.95 lbs
0.88 kg
Safety CE, FCC, RoHS

(1)4K/UHD p60 4:4:4 supported on input/output HDMI and USB-C input ports, 4K/UHD p60 4:2:0 is supported on HDBaseT output.

(2)Scaler does not support frame rate conversion.

Diagrams

Versatile switching for USB-C and HDMI video

The OME-ST31A offers automatic AV source switching, plus mirrored HDMI and HDBaseT outputs. The HDMI output includes 4K downscaling – perfect for applications with an HD confidence monitor and a 4K presentation display.


Remote AV switching

The OME-ST31A can be designed into a larger AV integration system for active classrooms and training rooms, to provide localized AV switching at student pods or workstations.

Resources

Documentation

pdf-icon Datasheet
pdf-icon Installation Guide
pdf-icon Manual
pdf-icon API

Declaration of Conformity

pdf-icon AT-OME-ST31A
pdf-icon CE AT-OME-ST31A
pdf-icon UK AT-OME-ST31A

CAD File

cad-icon-(1) AT-OME-ST31

Support

pdf-icon Product Engineering Document

Related Products

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Similar Products

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AT-OME-ST31A Firmware

Firmware Version 1.1.0
File Size 13.3 MB
Date 01.23.24

Release Notes

Version 1.1.0

Features

  • Added TCPProxy functionality.
  • Added the ability to toggle HDMI +5 V on the output.
  • Added AT-OCS-900N functionality.

Bug Fixes

  • Web server connectivity is no longer disrupted when running a security scan.
  • Fixed HDCP setting with macOS® devices.
  • Continuous polling of the AT-OME-ST31A, over RS-232, no longer crashes the unit.
  • Corrected an issue where the RS232zone[command] would be appended when triggering a command from the Display Control section of the built-in web server.
Previous Releases
Version 1.0.12

Features

  • Added API commands RHostName and SHostName. RHostName will print the active hostname of the device and SHostName will set the device hostname.
  • Improved Auto Switching reliability.
  • Status broadcast is now always enabled.
  • Set CEC as the default protocol for Display Control.
  • Web UI updates:
    • Added MAC Address field.
    • Added NTP server feature.
    • Added Velocity Database to Display Control function.
    • Added messaging about the lack of frame rate conversion when scaling is enabled.
    • Added hostname entry field.
    • Renamed Lock to Front Panel Lock.
    • Renamed Zone to RS232 over HDBaseT.
    • Renamed TX RS232 to RS232 Console.
    • Renamed MEM to Memory.
    • Renamed Default to Connected Display in EDID.
    • Added balloon help for CEC: “This section is only for testing prior using it in the display control section”.
    • Renamed Auto Power On (enable/disable) and Auto Power Off (enable/disable) to Display Auto Power (enable/disable).
    • Moved Auto Power Off Timer to the Display Auto Power section.
    • Renamed Power On Delay timer to Display Warm-up Timer.
    • Added balloon help for Auto Cool Down: “Cool Down timer protects display from receiving any commands while it is cooling down”.
    • Added balloon help for Auto Warm Down: “Warm Up Timer protects display from receiving any commands while it is warming up”.
    • Added balloon help for Auto Power Off Timer: “Amount of time before display will be turned off if there is no active source and RX is OME-RX. If RX is SR21, the display timer will depend on SR21 selection”.
    • Added balloon help for System settings: “1. If RX is OME-RX, Display Control is managed on ST31A. 2. If RX is SR21, Display Control should be disabled on ST31A and enabled on SR21”.
    • If RS232 or CEC display control is selected, then the TCP/IP settings are hidden.
    • If CEC is selected, then the RS232/IP section is hidden.
    • Added Velocity™ Display Control Database.
    • Renamed Auto Switch Mode to Auto Switch.
    • Added balloon help for HDCP section: “This section is meant for applications where Video conferencing system is connected to the video output of the ST31A”.
    • HDCP Settings now has its own section.

Bug Fixes

  • Fixed an issue where the AT-OME-ST31A would not enter standby mode if auto-switching was disabled and an active source was connected to the USB-C port.
  • Fixed an issue where display control would not work when the AT-OME-ST31A was powered over HDBaseT, by a receiver (e.g. AT-OME-EX-RX).
  • Fixed an issue where the default password could not be changed.
  • Fixed an issue where the RS232zone API command could cause the Telnet session to close, and respond with “Command FAILED” or not send hex characters 7E and 7F.
  • Web UI updates:
    • Removed new user section.
    • Removed status broadcast option.
    • Removed brute attack section.
    • Removed the Power on/off selection.
    • Removed a Save button from RS232 section; one Save button will commit all changes.
    • Removed 1920×1080 MCH and 3840×2160 MCH from EDID presets.
    • Removed EDID memory options 4 through 8.
    • Removed Auto Power On (enable/disable) and Auto Power Off (enable/disable) and replaced with Display Auto Power (enable/disable).
    • Removed options of 5-9 seconds from warm up and cool down timers.
    • Removed A/V Mute from Input selection.
    • Removed Fallback timer.
    • Removed Input Name option.
Version 1
  • Factory firmware

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Overview

Low-Profile AV Switcher, Uniquely Versatile

USB-C and HDMI video inputs.

For connecting the latest laptops, you’re all covered.

Learn More

Supports 4K/60 with 1080p downscaling.

No need to worry about backward incompatibility.

Learn More

Flexible powering.

Power an under-table OME-ST31A over HDBaseT, or locally.

Learn More

Additional Features

The Atlona AT-OME-ST31A is a compact yet versatile 3×1 switcher and HDBaseT transmitter with USB-C and HDMI video inputs, and mirrored HDMI and HDBaseT outputs. The OME-ST31A is part of the Omega™ Series of integration products for modern AV communications and collaboration.

Display control & automation

The OME-ST31A conveniently provides automatic source switching and display on/off powering based on input signal detection, such as when a laptop is connected or disconnected.

Local and long distance outputs

Two simultaneous outputs are included. One is for a local HDMI display, while the other is for extending video over HDBaseT up to 330 feet (100 meters) to a remote location.

Audio de-embedding to balanced stereo output

The OME-ST31A de-embeds stereo audio from any input source to feed into an amplifier and speakers.

Integrated HDBaseT link monitoring

A built-in, powerful tool provides quick performance validation, as well as troubleshooting to check for integrity of the cable link between the OME-ST31A and HDBaseT receiver.

Details

Details

The Atlona AT-OME-ST31A is a 3×1 switcher and HDBaseT transmitter designed for remote powering, with USB-C and HDMI inputs. The OME-ST31A features two-channel audio de-embedding to an analog balanced audio output. Part of the Omega™ Series of integration products for modern AV communications and collaboration, the OME-ST31A features mirrored HDMI and HDBaseT outputs and is HDCP 2.2 compliant. The USB-C input is ideal for AV interfacing with newer Mac®, Chromebook™, and Windows® PCs, as well as smartphones and tablets. Video signals up to 4K/60 4:2:0, plus embedded audio, control, and Ethernet 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 @ 60, 30, or 24 Hz 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. See the Related Products tab for specific product compatibility.

All-in-One Switcher, Controller, and Extender

This switching transmitter can serve as an integral component of a fully automated AV system, with the convenience of automatic input selection and display control. It can be remotely powered by Atlona HDBaseT-equipped devices. With the optional AT-PS-245-D4 power supply, the OME-ST31A can charge laptops and mobile devices through the USB-C port. For additional integration convenience, the OME-ST31A features TCP/IP and RS-232 control, RS-232 insertion over HDBaseT, and remote management with Velocity Device Manager.

Automatic Display Control

The OME-ST31A provides control to a display through TCP/IP, RS-232, or CEC*, without the need for a separate control system. This simplifies system design and integration while reducing costs. With automatic display control, the OME-ST31A can trigger a display to power on automatically whenever a laptop or other device is connected. At the end of the presentation, when the presenter disconnects the laptop, the OME-ST31A forces the display to power off. Ease of presenter interaction with the system, and the savings incurred by automatic display shutdown provide a significant return on investment. The OME-ST31A display control capability can also be triggered by an external control system.

* Consumer Electronics Control (CEC): Atlona does not guarantee the function of CEC with all televisions. We can confirm proper operation with many current Samsung, Panasonic, Sony, and LG TVs. Many manufacturers do not support the CEC “off” command when sent from a source and older TVs use proprietary commands. Atlona only supports those TVs that follow CEC command structure from HDMI 1.2a and support the “off” command when issued by a source. We encourage any dealer to get evaluation product from Atlona prior to designing a system around this control technology or be prepared to use other methods to control their displays if Atlona CEC is not compatible with the installed displays.

Reliable Auto-Switching

The OME-ST31A automatically selects an input source based on detection of the 5 volt hot plug detect (HPD) signal, as well as active video. This ensures reliable auto-switching operation for all video sources, including DVRs, DisplayPort / Mini DisplayPort adapters, and other devices that always maintain the HPD line at the 5 volt “high” state but may not be delivering active video.

Applications

  • Complete system integration – The OME-ST31A and a compatible HDBaseT receiver provide a compact, yet comprehensive and cost-effective integration solution. When installed below a meeting table, the available Pocket™ 3H (AT-PKT-3H) provides convenient tabletop AV cable access for easy BYOD connectivity.
  • Larger system applications – The OME-ST31A is ideal for extending AV connectivity from a central equipment rack to a meeting table or lectern, where presenters can easily access the system.
  • Auditoriums and lecture halls – This switcher can be used for presenting 4K video content through the projector, while also optimizing for a 1080p confidence monitor.

Product compatibility

The AT-OME-ST31A is ideal for 4K/UHD extension to the AT-UHD-EX-100CE-RX-PSE receiver, and can also provide remote 4K/UHD input switching for Atlona HDBaseT-equipped switchers and matrix switchers. Additionally, the AT-OME-ST31A is compatible with the AT-HDVS-200-RX receiver and HD scaler, and the AT-HDVS-SC-RX receiver and 4K/UHD scaler.

The AT-OME-ST31A is available as the AT-OME-ST31A-KIT with the AT-UHD-EX-100CE-RX-PSE.

See below for a complete listing of compatible products.

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Technical Features

3×1 HDBaseT switcher with USB-C and HDMI inputs

  • USB-C and two HDMI inputs
  • Immediate compatibility with laptops and tablets with USB-C ports supporting AV*
  • No need to provide USB-C to HDMI video adapters
  • * USB-C port supports AV and device charging (with optional AT-PS-245-D4 power supply), but not USB data.

Mirrored HDBaseT and HDMI outputs

  • Local and long-distance video outputs provide flexible options for AV system designs and applications

Video, audio, power, and data over category cable utilizing HDBaseT technology

  • Transmits 4K/UHD video up to 330 feet (100 meters) with CAT6/6a/7 cable, or up to 295 feet (90 meters) using CAT5e cable
  • Uses easy-to-integrate category cable for low-cost, reliable system installation

4K/UHD capability @ 60 Hz with 4:4:4 chroma sampling on local ports (HDMI and USB-C), plus support for HDR formats

  • HDBaseT output supports 4K/UHD @ 60 Hz with 4:2:0 chroma subsampling
  • HDMI and USB-C inputs, and HDMI output are compatible with 4K HDR10 @ 60 Hz and Dolby Vision™ @ 60 Hz, as well as HLG (Hybrid Log-Gamma) for 60p HDR broadcast services

HDCP 2.2 compliant

  • Adheres to latest specification for High-bandwidth Digital Content Protection*
  • Allows protected content stream to pass between authenticated devices
  • * HDBaseT receiver or switcher must also be HDCP 2.2 compliant.

Selectable 4K to 1080p downscaling

  • Integrated video processing available for down-converting 4K/UHD @ 60, 30, or 24 Hz to 1080p
  • Downscaling can be bypassed to allow pass-through up to 4K/60 4:4:4 and 4K HDR
  • Ideal for applications with 1080p displays, video conferencing codecs, and other HD sink devices

Remote powering over HDBaseT or local powering

  • Industry standard IEEE 802.3af PoE is supplied by an Atlona receiver or switcher over HDBaseT
  • Allows convenient switcher installation at a table or other remote location, without the need for local AC power
  • Also can be locally powered by the optional AT-PS-245-D4 power supply – to charge a USB-C mobile device

Automatic display control

  • Automatically changes display power state based on active or standby mode of the switcher. Control signals to display are transmitted via IP, RS-232, or CEC.
  • Enables display and volume control. CEC enables control of consumer displays (as supported by the display manufacturer).
  • Includes an adjustable lamp cooldown mode to avoid prematurely powering up a projector after shutdown
  • Eliminates the need for a complex AV control system

Automatic input selection using hot plug detect and video detection technology

  • Selects active input when sources are connected or if there is a change in source power status
  • Enables simplified, automatic system operation without user intervention

Audio de-embedding

  • De-embeds two-channel source audio into an analog balanced audio output

Multi-channel audio compliant

  • Passes through multi-channel audio formats from the HDMI or USB-C inputs
  • Supports PCM, Dolby® Digital, Dolby Digital Plus™, Dolby TrueHD, Dolby Atmos®, DTS® Digital Surround™, DTS-HD Master Audio™, and DTS:X®

EDID management

  • Manages EDID communications with the source through a display’s EDID or internally stored EDID
  • Ensures desired audio formats and video resolutions are provided to the AV system

HDCP management

  • Automatically reports HDCP compliance status to the source based on the sink device
  • Allows non-protected material from PCs to pass to non-compliant displays, streaming devices, and teleconference systems; protected content is not transmitted
  • Displays a green splash screen as visual confirmation that protected content is being blocked from transmission to a non-compliant display

Integrated HDBaseT link status monitoring

  • Tests integrity of the HDBaseT cable link between the transmitter and the receiver
  • Web GUI provides real-time link status
  • Quick, easy verification or troubleshooting of RJ-45 termination or twisted pair cable quality

Intuitive GUI-based configuration using integrated web server

  • Offers menu-based configuration of device settings including network access, input switching, signal processing, display control, HDCP and EDID management, and more
  • Allows fast configuration of internal product settings and troubleshooting from a mobile device or PC in the field

TCP/IP and RS-232 control

  • Flexible control options for compatibility with the Atlona Velocity™ control system, as well as other third-party control systems
  • Reduces integration time and costs

Easy to configure and manage with Velocity Device Manager

  • Centralized, network-based configuration and management of Atlona IP-controllable products and systems
  • Manage configuration and firmware updates for AV devices spanning a facility, building, enterprise, or residence
  • Available as a part of Velocity control systems or as a free virtual machine software download

Field-updatable firmware

  • Device can be updated in the field via the web GUI or Velocity Device Manager
  • USB port also available for firmware updates

Front panel power and signal status LEDs

  • LED indicators provide power, HDBaseT link, and input selection status information
  • Provides local, convenient setup and troubleshooting when network access is not available

Low-profile, 1.02 inch (26 mm) high enclosure

  • Easy installation into confined spaces below tables and in furniture

Included accessories

  • Installation guide, surface mounting hardware, and 2 meter (6.5 foot) USB-C male-to-male cable (USB 3.1 Gen 1)

Product Warranty

Specifications

Specifications

Video
HDMI Specification HDMI 2.0(1); HDCP 1.4, 2.2
UHD/HD/SD 4096×2160 (DCI) @ 60(1)/30/25/24 Hz
3840×2160 (UHD) @ 60(1)/30/25/24 Hz
1080p @ 60/59.9/50/30/29.97/25/24/23.98 Hz
1080i @ 60/59.94/50 Hz
720p @ 60/59.94/50 Hz		 720x576p @ 50 Hz
720x576i @ 50 Hz
640x480p @ 60/59.96 Hz
640x480i @ 60 Hz
VESA 2560×1600 @ 60 Hz
2048×1536 @ 60 Hz
1920×1200 @ 60 Hz
1680×1050 @ 60 Hz
1600×1200 @ 60 Hz
1440×900 @ 60 Hz
1400×1050 @ 60 Hz
1280×1024 @ 60 Hz		 1280×800 @ 60 Hz
1366×768 @ 60 Hz
1360×768 @ 60 Hz
1152×864 @ 60 Hz
1024×768 @ 60 Hz
800×600 @ 60 Hz
640×480 @ 60 Hz
Scaler (HDMI Output)(2) IN OUT
4K @ 24 Hz
4K @ 30 Hz
4K @ 60 Hz, 4:2:0		 1080p @ 24 Hz
1080p @ 30 Hz
1080p @ 60 Hz (YUV/RGB, 4:4:4)
Scaler Pass-Through (HDMI Output) 4K @ 60 Hz 4K @ 60 Hz
USB-C® Up to 4K/UHD @ 60Hz
Color Space YUV, RGB
Chroma Subsampling 4:4:4, 4:2:2, 4:2:0
Color Depth 8-bit, 10-bit, 12-bit
HDR HDR10, Hybrid-Log Gamma (HLG), and Dolby® Vision™ @ 60Hz; HDMI and USB-C ports only
Audio
Pass-Through Formats PCM
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®
Sample Rate 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz
Bit Rate 24 Mbits/s max
Analog Audio
Format 2-channel stereo
Balanced Output +4 dBu, nominal gain; +20 dBu headroom
Frequency Response 20 Hz to 20 kHz, ±0.5 dB
THD+N < 0.004% @ 20 Hz to 20 kHz
SNR > 105 dB @ 1 kHz, zero clipping @ 0 dBFS, unweighted
Protocols
Supported HTTP, Telnet
Addressing DHCP, static
Authentication IEEE 802.1x: PEAP/MSCHAPv2 or EAP-TLS
Control
RS-232 Device control and configuration; supports baud rates from 2400 to 115200
IP Device control and configuration
CEC Device control and configuration
Connectors
HDMI IN 2 – Type A, 19-pin female
HDMI OUT 1 – Type A, 19-pin female
USB-C 1 – USB Type-C v3.1, 24-pin female
HDBaseT OUT 1 – RJ45
LAN 1 – RJ45, 10/100/1000 Mbps
RS-232 1 – 3-pin captive screw (bidirectional)
AUDIO OUT 1 – 5-pin captive screw, balanced/unbalanced, 2-channel
DC 24V 1 – 4-pin, locking
USB
USB-C Device Charging Capability 60 W @ 20 V / 3 A, 36 W @ 12 V / 3 A, and 15 W @ 5 V / 3 A
Controls and Indicators
INPUT, DISPLAY 2 – momentary, tact-type
IP MODE, RESET 2 – momentary, tact-type, recessed
PWR indicator 1 – LED, green
LINK indicator 1 – LED, yellow
INPUT indicators: 1,2,3 3 – LED, green
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
Signal
Maximum TMDS Clock 600 MHz (300 MHz over HDBaseT)
HDBaseT 10 Gbps
Power
Consumption 101.5 W (with USB charging)
24.2 W (without USB charging)
External Power Supply (optional)
AT-PS-245-D4		 Input: 110 – 220 V AC, 50/60 Hz
Output: 24 V DC, 3 A
Safety: FCC, RCM, cULus, CE, RoHS
Environmental
Operating Temperature +32 to +113 °F
0 to +45 °C
Storage Temerature -4 to +140 °F
-20 to +60 °C
Operating Humidity (RH) 20% to 95%, non-condensing
Dimensions (H x W x D) Inches Millimeters
Unit 1.02 x 8.62 x 5.98 26 x 219 x 152
Power Supply 1.6 x 2.6 x 6.2 40.6 x 66 x 157.4
Chassis
Weight 1.95 lbs
0.88 kg
Safety CE, FCC, RoHS

(1)4K/UHD p60 4:4:4 supported on input/output HDMI and USB-C input ports, 4K/UHD p60 4:2:0 is supported on HDBaseT output.

(2)Scaler does not support frame rate conversion.

Diagrams

Diagrams

Versatile switching for USB-C and HDMI video

The OME-ST31A offers automatic AV source switching, plus mirrored HDMI and HDBaseT outputs. The HDMI output includes 4K downscaling – perfect for applications with an HD confidence monitor and a 4K presentation display.


Remote AV switching

The OME-ST31A can be designed into a larger AV integration system for active classrooms and training rooms, to provide localized AV switching at student pods or workstations.

Resources

Resources

Documentation

pdf-icon Datasheet
pdf-icon Installation Guide
pdf-icon Manual
pdf-icon API

Declaration of Conformity

pdf-icon AT-OME-ST31A
pdf-icon CE AT-OME-ST31A
pdf-icon UK AT-OME-ST31A

CAD File

cad-icon-(1) AT-OME-ST31

Support

pdf-icon Product Engineering Document
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Firmware

AT-OME-ST31A Firmware

Firmware Version 1.1.0
File Size 13.3 MB
Date 01.23.24

Release Notes

Version 1.1.0

Features

  • Added TCPProxy functionality.
  • Added the ability to toggle HDMI +5 V on the output.
  • Added AT-OCS-900N functionality.

Bug Fixes

  • Web server connectivity is no longer disrupted when running a security scan.
  • Fixed HDCP setting with macOS® devices.
  • Continuous polling of the AT-OME-ST31A, over RS-232, no longer crashes the unit.
  • Corrected an issue where the RS232zone[command] would be appended when triggering a command from the Display Control section of the built-in web server.
Previous Releases
Version 1.0.12

Features

  • Added API commands RHostName and SHostName. RHostName will print the active hostname of the device and SHostName will set the device hostname.
  • Improved Auto Switching reliability.
  • Status broadcast is now always enabled.
  • Set CEC as the default protocol for Display Control.
  • Web UI updates:
    • Added MAC Address field.
    • Added NTP server feature.
    • Added Velocity Database to Display Control function.
    • Added messaging about the lack of frame rate conversion when scaling is enabled.
    • Added hostname entry field.
    • Renamed Lock to Front Panel Lock.
    • Renamed Zone to RS232 over HDBaseT.
    • Renamed TX RS232 to RS232 Console.
    • Renamed MEM to Memory.
    • Renamed Default to Connected Display in EDID.
    • Added balloon help for CEC: “This section is only for testing prior using it in the display control section”.
    • Renamed Auto Power On (enable/disable) and Auto Power Off (enable/disable) to Display Auto Power (enable/disable).
    • Moved Auto Power Off Timer to the Display Auto Power section.
    • Renamed Power On Delay timer to Display Warm-up Timer.
    • Added balloon help for Auto Cool Down: “Cool Down timer protects display from receiving any commands while it is cooling down”.
    • Added balloon help for Auto Warm Down: “Warm Up Timer protects display from receiving any commands while it is warming up”.
    • Added balloon help for Auto Power Off Timer: “Amount of time before display will be turned off if there is no active source and RX is OME-RX. If RX is SR21, the display timer will depend on SR21 selection”.
    • Added balloon help for System settings: “1. If RX is OME-RX, Display Control is managed on ST31A. 2. If RX is SR21, Display Control should be disabled on ST31A and enabled on SR21”.
    • If RS232 or CEC display control is selected, then the TCP/IP settings are hidden.
    • If CEC is selected, then the RS232/IP section is hidden.
    • Added Velocity™ Display Control Database.
    • Renamed Auto Switch Mode to Auto Switch.
    • Added balloon help for HDCP section: “This section is meant for applications where Video conferencing system is connected to the video output of the ST31A”.
    • HDCP Settings now has its own section.

Bug Fixes

  • Fixed an issue where the AT-OME-ST31A would not enter standby mode if auto-switching was disabled and an active source was connected to the USB-C port.
  • Fixed an issue where display control would not work when the AT-OME-ST31A was powered over HDBaseT, by a receiver (e.g. AT-OME-EX-RX).
  • Fixed an issue where the default password could not be changed.
  • Fixed an issue where the RS232zone API command could cause the Telnet session to close, and respond with “Command FAILED” or not send hex characters 7E and 7F.
  • Web UI updates:
    • Removed new user section.
    • Removed status broadcast option.
    • Removed brute attack section.
    • Removed the Power on/off selection.
    • Removed a Save button from RS232 section; one Save button will commit all changes.
    • Removed 1920×1080 MCH and 3840×2160 MCH from EDID presets.
    • Removed EDID memory options 4 through 8.
    • Removed Auto Power On (enable/disable) and Auto Power Off (enable/disable) and replaced with Display Auto Power (enable/disable).
    • Removed options of 5-9 seconds from warm up and cool down timers.
    • Removed A/V Mute from Input selection.
    • Removed Fallback timer.
    • Removed Input Name option.
Version 1
  • Factory firmware

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USB-C and HDMI inputs.

A USB-C port ensures compatibility with MacBooks as well as PCs exclusively with USB-C for video output. With an optional power supply, the device can be charged over USB-C.

Supports 4K/60 with 1080p downscaling.

The OME-ST31A supports 4K/60 4:2:0 over the HDBaseT output, and full 4K/60 4:4:4 over the local HDMI output. 4K to 1080p downscaling is also available through the HDMI output - ideal for a secondary HD display as a confidence monitor.

Flexible powering.

The OME-ST31A comes out of the box for remote powering by an HDBaseT receiver or switcher. For standalone operation (local HDMI output only) or USB-C device charging, just add the optional power supply.