Product Overview

The Atlona AT-UHD-EX-70C-TX is a professional HDBaseT transmitter designed to extend 4K/UHD HDMI signals up to 230 feet (70 meters) over a single category cable. Supporting 4K/UHD video at 60 Hz with 4:2:0 chroma subsampling and HDCP 2.2 compliance, this HDBaseT transmitter for conference rooms and classrooms is a reliable point-to-point AV extension solution. Integrators seeking an HDMI over HDBaseT transmitter with RS-232 and IR control will find the AT-UHD-EX-70C-TX a cost-effective choice for corporate, education, and government AV systems. The unit also functions as an IEEE 802.3af PoE power sourcing device, supplying power to a compatible remote receiver over the HDBaseT link.

Product Description

The Atlona AT-UHD-EX-70C-TX (SKU: AT-UHD-EX-70C-TX) is an HDBaseT transmitter for HDMI transmission up to 230 feet (70 meters) over category cable with RS-232 and IR control pass-through. It transmits video signals up to 4K/UHD at 60 Hz with 4:2:0 chroma subsampling, plus embedded multi-channel audio, making it well-suited for AV installations that demand high-resolution content delivery without costly fiber infrastructure. The AT-UHD-EX-70C-TX is HDCP 2.2 compliant and supports EDID communication, ensuring reliable handshaking between source and display devices.

This transmitter supports 4K HDR10 at 24 Hz with 4:2:0 chroma subsampling and 10-bit color depth, providing a clear upgrade path for HDR-capable display environments. At 1080p, the unit extends signals up to 230 feet (70 meters) over CAT6/6a/7 cable, and up to 200 feet (60 meters) over CAT5e flexible enough for a wide range of installation scenarios.

The AT-UHD-EX-70C-TX passes bidirectional RS-232 and IR control signals over the HDBaseT link, eliminating the need for separate control wiring runs. CEC pass-through is also supported. The unit is locally AC-powered via an included universal power supply, and as an IEEE 802.3af PoE Power Sourcing Equipment (PSE) device, it can power a compatible remote receiver such as the AT-UHD-EX-70C-RX reducing installation cost and complexity.

Multi-channel audio formats are fully supported, including 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. The low-profile, quarter rack-width metal enclosure measures just 0.93 x 4.2 x 2.95 inches and includes surface mounting brackets for installation under tables, in furniture, or on walls. A front-panel USB port enables straightforward field firmware updates. The included power supply can chain power to up to three Atlona HDBaseT extenders simultaneously, reducing the number of power supplies needed in a system.

Key Features

• 4K/UHD at 60 Hz (4:2:0) Transmits 3840×2160 and 4096×2160 video at up to 60 Hz with 4:2:0 chroma subsampling for high-resolution commercial display applications.
• HDBaseT Extension up to 230 ft Extends AV and control signals up to 230 feet (70 meters) at 1080p or 130 feet (40 meters) at 4K/UHD over CAT6/6a/7 cable, using low-cost category cabling infrastructure.
• HDCP 2.2 Compliant Adheres to the current specification for High-bandwidth Digital Content Protection, allowing protected content to pass between devices without interruption.
• 4K HDR10 Support Passes 4K HDR10 content at 24 Hz with 4:2:0 chroma subsampling and 10-bit color for HDR-capable display environments.
• IEEE 802.3af PoE Power Sourcing Supplies power over the HDBaseT link to a compatible remote receiver, reducing cabling requirements and installation cost.
• Bidirectional RS-232 and IR Control Extends RS-232 and IR control signals over the HDBaseT link for integrated source and display management without additional control cabling.
• CEC Pass-Through Passes CEC commands over HDBaseT for simplified display control in systems that leverage HDMI-CEC functionality.
• Multi-Channel Audio Support Compatible with PCM, Dolby Atmos, Dolby TrueHD, DTS:X, DTS-HD Master Audio, and all major audio formats up to 24-bit at 192 kHz sample rates.
• Power Chaining Included power supply can power up to three Atlona HDBaseT extenders simultaneously, reducing rack clutter and hardware costs.
• Field-Updatable Firmware Front panel Micro-A USB port allows firmware updates without returning the unit to a service depot.
• Quarter Rack-Width Enclosure Low-profile 0.93-inch tall metal chassis includes surface mounting brackets for under-table, furniture, or wall installation.
• 10-Year Limited Warranty Backed by Atlona’s 10-year limited product warranty for long-term installation confidence.

Typical Applications

• Corporate conference rooms requiring HDMI signal extension to HDBaseT-equipped displays or projectors
• Classrooms and lecture halls extending laptop or media player signals to a projector with an HDBaseT input
• Government and municipal AV installations needing reliable point-to-point 4K signal distribution
• Hospitality AV systems where displays are located more than 25 feet from the source
• Integration with Atlona matrix switchers (AT-UHD-CLSO-824, AT-UHD-SW-5000ED) that feature HDBaseT inputs
• Installations requiring remote input connectivity to expand the reach of an existing AV system

Technical Specifications

Frequently Asked Questions

Q: What is the maximum transmission distance for 4K/UHD signals with the AT-UHD-EX-70C-TX?The AT-UHD-EX-70C-TX transmits 4K/UHD signals up to 130 feet (40 meters) over CAT6/6a/7 cable, or 115 feet (35 meters) over CAT5e. For 1080p, the range extends to 230 feet (70 meters) over CAT6/6a/7.Q: Does the AT-UHD-EX-70C-TX require its own power supply?Yes, the AT-UHD-EX-70C-TX is locally AC-powered via the included universal power supply (100240 V AC input, 48 V DC output). It can also supply power over HDBaseT to a compatible remote receiver such as the AT-UHD-EX-70C-RX via IEEE 802.3af PoE.Q: Is the AT-UHD-EX-70C-TX compatible with third-party HDBaseT receivers?The AT-UHD-EX-70C-TX is designed for use with the AT-UHD-EX-70C-RX receiver and Atlona switchers with HDBaseT inputs such as the AT-UHD-CLSO-824 and AT-UHD-SW-5000ED. It may also be used with third-party HDBaseT-compliant devices, though Atlona recommends verifying compatibility for specific third-party pairings.Q: What control signals does the AT-UHD-EX-70C-TX pass over HDBaseT?The unit passes bidirectional RS-232 (via 3-pin captive screw) and IR (via 4-pin captive screw) control signals over the HDBaseT link. CEC pass-through is also supported.Q: Does the AT-UHD-EX-70C-TX support Dolby Atmos or DTS:X audio?Yes. The AT-UHD-EX-70C-TX passes all major multi-channel audio formats, including Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, DTS:X, and DTS-HD Master Audio, at bit depths up to 24-bit and sample rates up to 192 kHz.Q: Can the AT-UHD-EX-70C-TX be mounted under a table or in furniture?Yes. The unit ships with surface mounting brackets and features a low-profile quarter rack-width enclosure (0.93 inches tall), making it suitable for under-table, in-furniture, or wall-surface mounting.Q: How is firmware updated on the AT-UHD-EX-70C-TX?Firmware is updated via the front panel Micro-A USB port. Current firmware and release notes are available from Atlona’s support portal.Q: Where can I purchase the AT-UHD-EX-70C-TX?The AT-UHD-EX-70C-TX is available at , an authorized commercial AV reseller serving integrators and end users across North America.