Atlona AT-HDR-EX-70C-TX

The Atlona AT-HDR-EX-70C-TX is a compact HDBaseT transmitter designed for point-to-point extension of 4K and high dynamic range (HDR) content in residential, corporate AV, and professional installation environments. It accepts an HDMI 2.0b source and transmits 4K/UHD at 60 Hz with 4:4:4 chroma sampling, full HDR metadata, multi-channel audio, and bidirectional RS-232 and IR control signals — all over a single Cat 6 or Cat 6A cable. The unit pairs directly with the AT-HDR-EX-70C-RX receiver, which it can power remotely over HDBaseT, eliminating the need for a local power outlet at the display end. Its compact, surface-mountable chassis fits discreetly into furniture, lecterns, or equipment racks.

Full 4K-60 4:4:4 HDR Extension

Unlike many HDBaseT transmitters that cap 4K at 4:2:0 chroma subsampling, the AT-HDR-EX-70C-TX uses visually lossless compression to carry the full 4:4:4 color signal at 60 Hz — the same colour bandwidth delivered by the source. This matters in HDR environments because HDR10 and Dolby Vision rely on accurate per-pixel colour to reproduce wide-gamut content faithfully; compressing the chroma before transmission discards the very data HDR needs most. For installers, this means no compromises when connecting high-end UHD Blu-ray players, gaming consoles, or broadcast sources to HDR-capable displays — the receiver output is visually identical to a direct HDMI connection.

Single-Cable Control and Power Delivery

The AT-HDR-EX-70C-TX condenses five infrastructure layers — 4K video, multi-channel audio, bidirectional RS-232, bidirectional IR, and DC power for the receiver — into a single Cat 6 or Cat 6A run. The transmitter supplies 48 V DC over HDBaseT to the paired AT-HDR-EX-70C-RX, so the receiver needs no local AC outlet. In practice this dramatically reduces the conduit fill and outlet count at the display end: an installer can wall-mount a receiver behind a display in a room where no power socket exists, and still retain full RS-232 and IR control over the display from the rack or control system. Bidirectional control means feedback from the display (power status, input confirmation) passes back to the control system without additional cabling.

One cable. 4K HDR. Full control. Remote power.

HDCP 2.2 compliant · CE & FCC certified · Atlona 10-year limited warranty

Broad HDR Format Support

The transmitter supports HDR10 at up to 60 Hz and Dolby Vision at 30 Hz, plus HLG (Hybrid Log-Gamma) — covering the three dominant HDR formats in both consumer and broadcast markets. HDCP 2.2 compliance ensures protected 4K HDR streams from streaming sticks, UHD disc players, and set-top boxes pass through without authentication failures. Installers specifying systems for TV showrooms, high-end residential theatres, or visualisation suites can install this unit with confidence that it will handle any HDR source available today and the formats most likely to emerge in the near term.

Rich Multi-Channel Audio Pass-Through

The unit passes the full HDMI 2.0b audio payload intact, including PCM 2-channel, LPCM 5.1 and 7.1, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, Dolby Atmos, DTS Digital Surround, DTS-HD Master Audio, and DTS:X. This means object-based audio formats are not stripped at the transmitter — a common limitation of older HDBaseT extenders. In a home cinema or high-end AV room, the AVR or soundbar at the display end receives the same bitstream it would from a direct HDMI connection, preserving the immersive audio experience the source was encoded with.

HDBaseT Link Status Testing Built In

A front-panel test button and LED, combined with a free Atlona Analyzer software utility, allow installers to verify the HDBaseT cable link during or after installation without a separate test device. The utility provides real-time link status and detailed HDMI signal information, making it straightforward to confirm RJ-45 termination quality and cable integrity. This is particularly valuable in retrofit or pull-through installations where the cable path is unknown — a failed termination or marginal cable can be identified and corrected before the system is handed over, rather than during a support call.

Compact, Flexible Mounting

The AT-HDR-EX-70C-TX measures just 26 x 109 x 127 mm (H x W x D) and weighs 0.39 kg, with two surface-mount brackets and four screws included in the box. It can be secured to any flat surface — behind a display, under a desk, inside a lectern, or in the back of a rack — keeping the installation tidy without needing a dedicated rack shelf. The 48 V DC power supply accepts 100–240 V AC at 50/60 Hz, making it suitable for international deployments without a transformer.