Kramer 676T 4K60 4:4:4 HDMI and RS-232 Transmitter over Ultra-Reach MM/SM Fiber Optic

The Kramer 676T is a high-performance fiber-optic transmitter designed for ultra‑long extension of HDMI (up to 4K @ 60 Hz, 4:4:4) and RS‑232 signals. It accepts HDMI and serial input, converts them into an optical signal, and transmits them over multimode or single-mode fiber with near-zero latency. Ideal for government, medical, rental, staging, and large-scale AV systems.

Equipped with a multi-mode SFP+ (single-mode optional), it supports HDCP 2.2, HDMI 2.0, LPCM 7.1, Dolby TrueHD, DTS‑HD, CEC-based power saving, and Kramer’s I‑EDIDPro™ for seamless EDID management. Compact, fanless aluminum chassis is rack-mountable.

Key Features

• Resolution: Up to 4096×2160 @ 60Hz (4:4:4)
• Bandwidth: 18 Gbps (HDMI 2.0, 6 Gbps per channel)
• Fiber: LC‑connected multimode (incl.) or single-mode (up to 33 km)
• SFP+ Module: Kramer-certified 10 Gbps IEEE 802.3ae
• RS‑232: Bidirectional via 3‑pin terminal block
• CEC Power Control: Auto power on/off linked devices
• I‑EDIDPro™: Auto EDID management for plug-and-play
• Indicators: LEDs for source, sink, optical link, and power
• Rack Mounting: DigiTOOLS® - side-by-side 3 units in 1U
• Cooling: Passive convection, aluminum chassis

Technical Specifications

• Dimensions: 4.72″ × 2.81″ × 0.96″ (12.00 × 7.15 × 2.44 cm)
• Weight: 0.5 lb (0.2 kg)
• Video Bandwidth: 18 Gbps
• Max Resolution: 4096×2160 @ 60 Hz (4:4:4)
• Compliance: HDMI 2.0, HDCP 2.2, LPCM 7.1, Dolby TrueHD, DTS‑HD
• Fiber Reach: OM3 MM: 3 km; OS1 SM: 33 km
• SFP+ Standards: IEEE 802.3ae; Class 1 Laser
• RS‑232 Baud Rate: 300-115,200
• Power Input: 12 V DC, 2 A (480 mA typical)
• Operating Temp: 0 °C to +40 °C; Storage: -40 °C to +70 °C
• Humidity: 10-90% RH, non-condensing
• Regulatory: CE, UL, RoHS, WEEE, EMC EN55022/24, IEC60825‑1/2, IEC62368‑1

What's Included

• 676T transmitter unit
• Multimode 10 Gbps SFP+ transceiver
• 12 V DC power adapter + cord
• Mounting bracket set