AT-UHD-SYNC ***Discontinued***

• • • Discontinued • • •

A new version of this product is available as the Etude™ Sync (AT-ETU-SYNC).

Model Number: AT-UHD-SYNC

  • 4K/UHD support
  • 5 volt / HPD emulation
  • EDID emulation
  • LED indicators
  • Signal regeneration
  • External power supply or USB-powered
  • Palm sized form factor reduces impact within confined spaces

NOTE: The AT-UHD-SYNC is discontinued. The Etude Sync (AT-ETU-SYNC) is the new version of this product.

4K HDMI Emulator/Tester

Restore any HDMI signal up to 4K/UHD with HD digital audio. Not only will it restore the signal, but it will also reveal the cause of the failure.

With three LEDs that indicate the presence and state of 5V, Hot Plug Detect, and HDCP signals, installers can quickly identify and resolve HDMI-related issues.

Often damaged or long cable runs prevent the necessary handshake between the video display and the source as they communicate their capabilities. The built-in EDID and HPD emulators make sure that the source reliably transmits the best audio and video signals that the display and connected components support.

A Valuable Troubleshooting Tool

  • Ensures proper operation, for the best performing HDMI audio and video signal between any source and display
  • Resolves loss of video, intermittent (flashing) video, snow, or color-space (pink or green) issues
  • Test HDMI system components and cables to identify HDCP support. Also detects presence of 5 volt and HPD signals


  1. No video output from Cisco/Scientific Atlanta cable set top box when integrated into an HDBaseT system.
  2. Audio Video has intermittent dropouts or is not outputting any picture or sound.
  3. Determine the root cause is for missing picture or sound.


  1. HDMI 1.2 sources don’t support HDMI 1.3 clock stretching protocol. The Atlona Signal Regeneration feature ensures HDMI 1.2 sources will transmit video to the display.
  2. Resolves and restores audio video signals with unique stored or learned EDID files.
  3. UHD-SYNC LED status indicators show HDCP compliance, 5V source transmission and sink (display) Hot Plug event confirmation. Possible indication of cable type distance limitations, incorrect termination or break/short in one of the twisted pairs. If a hot plug event is prevented from occurring, display to source reporting for EDID/HDCP will prevent audio video signal transmission.


4K/UHD support

  • Ensures the best video performance

5 volt / HPD emulation

  • Restores A/V signals due to faulty cables or when multiple distribution devices are cascaded

EDID emulation

  • Nine unique stored files plus learning capability to ensure the best picture and sound is achieved

LED indicators

  • HPD, 5V, and HDCP indicators aid in HDMI signal failure analysis

Signal regeneration

  • HDMI 1.2 sources can be reliably transmitted with HDBaseT extenders

External power supply or USB-powered

  • Use included power supply or harvest power from local USB devices to power UHD-SYNC when an AC outlet isn’t available

Palm sized form factor reduces impact within confined spaces

Video 4096×2160@24/25/30/50*/60Hz*, 3840×2160@24/25/30/50*/60Hz*, 1080p@23.98/24/25/29.97/30/50/59.94/60Hz, 1080i@50/59.94/60Hz, 720p@50/59.94/60Hz, 576i, 576p, 480i, 480p
VESA 800×600, 1024×768, 1280×768, 1280×800, 1280×1024, 1366×768, 1400×1050, 1440×900, 1600×900, 1600×1200, 1680×1050, 1920×1200
Color Space YUV, RGB
Chroma Subsampling 4:4:4, 4:2:2, 4:2:0
Color Depth 8-bit, 10-bit, 12-bit
Formats PCM 2Ch, LPCM 5.1, LPCM 7.1, Dolby Digital, DTS 5.1, Dolby Digital Plus, Dolby TrueHD, DTS-HD Master Audio
Sample Rate 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Total Harmonic Distortion <1% over frequency bandwidth 20-20k
Signal/Noise Ratio 90+ dB
Frequency Range 20 to 20k
HDMI 8-bit up to 15 meters up to 50 feet
HDMI 10-bit/12-bit/4K up to 10 meters up to 30 feet
Bandwidth 10.2 Gbps
CEC Pass through
HDCP Compliant
Operating 0°C to 50°C 32°F to 122°F
Storage -20°C to 60°C -4°F to 140°F
Humidity 20 to 90% non-condensing
Consumption 4W
Supply Input: 100-240V ~ 50/60Hz 0.2A

Output: +5V/1A

H x W x D 24.32 x 73.09 x 70 (mm) 0.96 x 2.88 x 2.76 (inch)
Device 0.09kg 0.19lbs
Device CE, FCC, cULus, C-Tick
HDMI IN 3D, 4K, Dolby TrueHD, DTS-HD Master Audio
HDMI OUT 3D, 4K, Dolby TrueHD, DTS-HD Master Audio
Mini USB Power and firmware updating
Package Contents
QTY Item
1 DC 5V/1A power adaptor
1 Pair of wall mount ears
1 User manual

* 4096×2160@50/60Hz & 3840×2160@50/60Hz supported @ chroma subsampling 4:2:0 8-bit only



pdf-icon Manual
pdf-icon Datasheet

Diagrams, Drawings & CAD Files

cad-icon-(1) CAD Files

Declarations Of Conformity

pdf-icon Declarations Of Conformity
AT-UHD-PRO3-66M 4K/UHD Dual-Distance 6×6 HDMI to HDBaseT Matrix Switcher with PoE
AT-UHD-PRO3-88M 4K/UHD Dual-Distance 8×8 HDMI to HDBaseT Matrix Switcher with PoE
AT-PRO3HD44M Atlona HDMI 4 by 4 Matrix Switcher over a Single Category Cable
AT-H2H-44M Atlona 4 by 4 HDMI Matrix Switcher

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