Atlona AT-OME-ST31A Three-Input Switcher and HDBaseT Transmitter with USB-C and HDMI Inputs

The Atlona AT-OME-ST31A is a 3×1 HDBaseT switcher and transmitter with USB-C and HDMI inputs, designed for modern meeting spaces, classrooms, and AV collaboration environments. As part of the Omega™ Series, this compact unit supports 4K/UHD video at 60 Hz with 4:4:4 chroma sampling (local ports) and transmits HDMI video, audio, Ethernet, and control signals over HDBaseT up to 330 feet (100 meters). The OME-ST31A is ideal for BYOD environments and fully automated AV systems.

The switcher features two HDMI inputs, one USB-C input for AV and optional device charging (up to 60 W), and mirrored HDMI and HDBaseT outputs for local and remote display connectivity. It supports HDR formats such as HDR10, HLG, and Dolby Vision™, ensuring optimal image quality. With automatic input selection, display control, and audio de-embedding, the OME-ST31A simplifies AV system integration while delivering professional-grade performance. It can be powered remotely via HDBaseT or locally using the optional AT-PS-245-D4 power supply.

Key Features

• 3×1 Switching: Two HDMI inputs and one USB-C input for seamless BYOD and AV integration.
• Mirrored HDMI and HDBaseT Outputs: Simultaneous local and remote video connectivity for flexible AV system designs.
• 4K/UHD Support: 4K/60 4:4:4 (local) and 4K/60 4:2:0 (HDBaseT) capability with HDR10, HLG, and Dolby Vision™ support.
• Automatic Input Switching: Detects active sources and switches automatically based on video or 5V hot plug signals.
• Automatic Display Control: Powers displays on/off via IP, RS-232, or CEC – no external control system required.
• Audio De-Embedding: Extracts two-channel analog audio from any input to a balanced output for sound reinforcement.
• 4K to 1080p Downscaling: Scales 4K content for HD displays and conferencing codecs.
• USB-C Device Charging: Provides up to 60 W charging power for laptops and tablets (with optional power supply).
• Remote Powering: Can be powered over HDBaseT via PoE, simplifying under-table or wall installations.
• Velocity Device Manager Integration: Enables centralized configuration, monitoring, and firmware updates.

Technical Specifications

• Inputs: 2 × HDMI (Type A), 1 × USB-C (v3.1)
• Outputs: 1 × HDMI (Type A), 1 × HDBaseT (RJ45)
• Maximum Resolution: 4096×2160 @ 60 Hz (HDMI & USB-C 4:4:4), 4K/60 4:2:0 (HDBaseT)
• Color Depth: 8-, 10-, and 12-bit; RGB and YUV color spaces
• HDR Support: HDR10, HLG, and Dolby Vision™ @ 60 Hz
• Scaling: Selectable 4K → 1080p downscaling (HDMI output only)
• Audio Output: 1 × 5-pin captive screw (balanced/unbalanced stereo)
• Audio Formats: PCM, Dolby Digital, Dolby TrueHD, Dolby Atmos, DTS-HD Master Audio, DTS:X
• Frequency Response: 20 Hz–20 kHz ±0.5 dB
• THD+N: < 0.004% @ 20 Hz–20 kHz
• SNR: > 105 dB @ 1 kHz (0 dBFS, unweighted)
• Control Interfaces: IP (HTTP, Telnet), RS-232, CEC
• Network: 1 × RJ45 (10/100/1000 Mbps)
• HDBaseT Distance: Up to 330 ft (100 m) with CAT6/6a/7 cable
• USB-C Power Delivery: Up to 60 W (20 V/3 A) with optional AT-PS-245-D4 PSU
• Power Options: Remote PoE (IEEE 802.3af) or local 24 VDC / 3 A
• Power Consumption: 24.2 W (no USB charging) / 101.5 W (with charging)
• Operating Temperature: 32–113°F (0–45°C)
• Dimensions (H×W×D): 1.02 × 8.62 × 5.98 in (26 × 219 × 152 mm)
• Weight: 1.95 lb (0.88 kg)
• Certifications: CE, FCC, RoHS