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Atlona® 4K/UHD 8×2 Multi-Format Matrix Switcher
Atlona® 4K/UHD 8×2 Multi-Format Matrix Switcher 0
Atlona® 4K/UHD 8×2 Multi-Format Matrix Switcher 1

Atlona® 4K/UHD 8×2 Multi-Format Matrix Switcher

Model #: AT-UHD-CLSO-824
At a Glance
The AT-UHD-CLSO-824 is part of the Atlona CLSO Series of multi-format switchers and matrix switchers for presentation AV systems. The CLSO Series features built-in HDBaseT extension, plus powerful control and audio system integration features. See below for more information.
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Product Compatibility

The AT-UHD-CLSO-824 features HDBaseT inputs and outputs, and is compatible with Atlona UHD-EX and HDVS-200 Series transmitters and receivers.

The Atlona AT-UHD-CLSO-824 is a 4K/UHD 8×2 matrix switcher with dual, HDBaseT and mirrored HDMI outputs for 4K/UHD @ 60Hz signals. This matrix switcher has multi-format signal-handling, Ethernet-enabled 100-meter HDBaseT™ input/output extension, and advanced audio capabilities.

Presentation Matrix Switcher

The CLSO-824 brings advanced multi-format matrix switching to the CLSO series of classroom and small office switchers. The mix of inputs supports remote sources at lecterns and conference room tables via HDBaseT transmission as well as local sources in the equipment rack. The matrix serves a wide array of room configurations with two HDBaseT video outputs, each featuring a mirrored HDMI port to provide an additional output for a local display or an Atlona Extender Kit.

HDBaseT Inputs and Outputs

The CLSO-824 offers three Ethernet-enabled HDBaseT inputs designed to provide system design flexibility. Two HDBaseT outputs on the switcher provide extended distance AV signal extension up to 330 feet (100 meters). These outputs are Ethernet-enabled to also provide extension of control signals to displays. All HDBaseT inputs and outputs feature industry standard Power over Ethernet to remotely power extender endpoints.


Sophisticated matrixing capabilities within the switcher include a dedicated audio mix-matrix for signals routed to the switcher’s outputs. This gives integrators the ability to mix audio signals from either of the two selected video sources along with both mic/line input signals. Audio is de-embedded from the video signal for processing and mixing with the mic/line sources. The resulting audio mix is sent to the balanced line level analog outputs and re-embedded to the digital video outputs.


  • Dual-screen classrooms, conference rooms, or training environments – The CLSO-824 allows independent content presented on two separate displays.
  • Divisible rooms – This matrix switcher is perfect for serving a room that can be divided into two, with the ability to feed a primary display and a confidence monitor in each space, while also connecting to remote input locations such as lecterns, floor boxes, and walls. (The CLSO-824 is featured in a divisible room application in this case study.)
  • Video conferencing systems – The CLSO-824 makes it easy to integrate a camera, codec, and one or two displays.

Configured and Managed by AMS

The Atlona Management System (AMS) is a powerful network software platform ideal for configuring, managing, and monitoring the CLSO-824 and other Atlona IP-controllable devices over a LAN, WAN, or VPN. AMS is available free from Atlona, and greatly streamlines installation and maintenance of several Atlona products throughout a facility or enterprise, from a standard web browser.

8×2 matrix switcher with HDBaseT and HDMI ports for each output

  • Eight different sources may be switched to either of two outputs with mirrored HDBaseT/HDMI signals
  • Serves a wide array of room configurations

Three HDBaseT inputs

  • Works with Atlona AT-HDVS-200 transmitters for placement at remote sources near lecterns, conference tables, and instructor’s desks
  • Simplifies integration of remote sources by eliminating power supplies when used with PoE-powered transmitters; single category cable carries AV signals, control and power

Four HDMI inputs

  • Digital inputs to support up to four HDMI sources or DisplayPort and DVI sources with appropriate adapters
  • Ideal for sources located at the equipment rack

One multi-function analog input on 15-pin HD connector

  • Accepts RGBHV and component signals using common adaptors and break out cables
  • Provides input options for legacy analog sources

Two Ethernet enabled, HDBaseT outputs

  • Extends control signals from third party control processors via HDBaseT along with 4K/UHD video, and audio through a single cable with 330 foot (100 m) performance
  • Network connections simplify control system design; eliminates multiple cable runs between source, control system router and display

Audio output matrix mixer

  • Mixes de-embedded digital audio along with analog mic/line level inputs and routes to analog outputs or re-embed to video outputs
  • Eliminates the need for complex external audio routing systems

Two, balanced, stereo audio outputs on 6-pin captive screw connectors

  • Maintains proper audio gain structure between commercial line level devices; eliminates adaptors
  • Designed for use with analog commercial sound systems

Mirrored outputs on HDBaseT and HDMI

  • Each matrix output supports dual display applications for a local display and extended distance displays up to 330 feet (100 meters)
  • Eliminates cost associated with extra extension components; simplifies installation. HDMI output allows additional HDBaseT transmitter for dual, long distance applications

4K/UHD @ 60 Hz capability

  • Compatible with Ultra High Definition sources and displays up to 4K @ 60 Hz with 4:2:0 color subsampling
  • Supports high resolution applications such as CAD, desktop publishing, and detailed financial reporting

Power over Ethernet for remote-powered HDBaseT transmitters and receivers

  • Industry standard IEEE 802.3af PoE supplied by the switcher over HDBaseT
  • No local AC outlet required saves time and integration costs

TCP/IP, RS-232, and IR, control

  • Compatibility with third-party control systems provides flexible control options
  • Reduces integration time and costs

EDID management

  • Manages EDID communications between source and switcher; allows integrators to force sources to preferred resolution
  • Ensures desired audio formats and video resolutions are provided to the AV system; eliminates the need for EDID management device

HDCP Management

  • Allows non-protected material from PCs to pass to non-compliant displays and teleconference systems while protected content is not transmitted
  • HDCP compliance can be switched on/off from control systems for use with non-compliant displays, streaming devices, and codecs

Two, balanced line/mic input with 48V phantom power

  • Provides professional audio input for wired and wireless microphones
  • Saves installation costs by eliminating external audio mixer

Microphone ducking with advanced controls

  • Automatically reduces program audio levels when mic is used
  • Ensures optimized voice-over performance

Audio de-embedding

  • De-embeds PCM audio from HDMI inputs to audio out matrix
  • Provides audio signal routing to sound system

Adjustable Volume and EQ

  • Features independent gain control for each input, master audio level controls 5 band EQ adjustment
  • Optimizes audio signals eliminating the need for an external mixer

Front panel volume and mute controls

  • Volume Up and Volume Down through menu to adjust output level to sound system
  • Provides quick level adjustment for operators

Easy, GUI-based configuration using integrated web server

  • Offers menu-based configuration of network settings, RS-232 settings, input switching, EDID and HDCP management and audio
  • Allows fast configuration of internal product settings and troubleshooting from a tablet, smart phone or PC in the field

IP to RS-232 translation

  • Converts TCP/IP commands to RS-232 commands for output to external devices
  • Enables single IP connection to control processor to control both IP and RS-232 connected devices. Faster installation

Ten RS-232 ports

  • Multiple, bidirectional, RS-232 ports to control other devices in the system
  • Reduces cost associated with complex control processors

Ethernet, RS-232 and IR HDBaseT insertion

  • Adds control signals to the HDBaseT transmission including Ethernet, RS-232 and bi-directional IR
  • Simplifies display control from third-party control systems

Multi-channel audio compliant

  • Supports PCM, Dolby® Digital, Dolby Digital Plus™, Dolby TrueHD, Dolby Atmos®, DTS Digital Surround™, and DTS-HD Master Audio™ in pass through mode
  • Allows any two-channel audio stream to be used within a professional audio system

Rack mountable 1U, full-rack width enclosure

  • Installs easily in rack mounted systems with included 19” rack and wall mount brackets
  • Reduces installation time and cost

Included accessories

  • User guide, desktop power supply with, detachable power cable, IR hand held remote control, and rack mount bracket kit


Operating32°F to 122°F
Storage-4°F to 140°F
Humidity20 to 90% non-condensing
Idle Consumption3.52W
SupplyInput: AC100~240 VAC 50/60Hz; Output: 48 VDC 3.125A
H x W x D1.73 x 17.08 x 10.04 (inch)
H x W x D W/Feet2.17 x 17.08 x 10.04 (inch)
Rack Unit1U

Misc. Specs

Product Weight (lbs.)7.69
WarningProposition 65 Warning for California Residents