4K60 4:4:4 HDMI and RS–232 Transmitter over Ultra–Reach MM/SM Fiber Optic
Compact, plug & play HDMI optical transmitter
Multi–mode or single–mode fiber
Video resolution — Up to 4K@60 (4:4:4)
Control extension
Up to 33km ultra–reach extension
676T is a high−performance HDMI fiber transmitter for ultra−reach extension of 4K@60Hz (4:4:4) HDMI signals. 676T converts the HDMI and RS−232 input signal to an optical signal that is transmitted over a fiber optic cable to a compatible receiver that converts it back to HDMI and RS−232 signals. 676T includes a multi−mode SFP+ transceiver, but can be used with any Kramer certified SFP+ transceiver, such as a single−mode SFP+ transceiver.
- High Performance Standard Fiber Extender — HDMI fiber transmitter for providing ultra–reach signals over either multi–mode or single–mode optical fiber infrastructures, using Kramer pluggable OSP SFP+ units (multi–mode SFP+ included). Near–zero latency video chroma sub–sampling conversion technology, is employed to auto–adapt above 10G HDMI signals to 10G optical link signal data–rate.
Note: To ensure specified performance, support, and warranty of this product, use only Kramer's certified hi–performance OSP SFP+ pluggable optical units.
- Multi–drop Signal Distribution — Use optical splitters to extend the input signals from a single transmitter to multiple receivers, for displaying the same content on multiple display devices using optical splitting only, with no need for AV distribution amplifiers.
- HDMI Signal Extension — HDCP 2.2 compliant and supports up to 18G (6G per channel) data rate, LPCM 7.1, Dolby True HD, and DTS–HD as specified in HDMI 2.0.
- Power Saving — With CEC ON/OFF function, shut down a display device automatically when not in use, and auto power it ON upon presentation start.
- I–EDIDPro™ Kramer Intelligent EDID Processing™ — Intelligent EDID handling, processing and pass–through algorithm that ensures Plug and Play operation for HDMI source and display systems.
- Bidirectional RS–232 Extension — Serial interface data flows in both directions, to enable data transmission and control of devices.
- Cost–Effective Maintenance — Status LED indicators for power, source, sink and fiber link connections detection facilitate easy local troubleshooting.
- Easy Installation — DigiTOOLS® rack mountable fan–less enclosure enables side–by–side mounting of 3 units in a 1U rack space with the recommended rack adapter.

INPUTS
HDMI: On a female HDMI connector
OUTPUTS
Fiber Optic: On LC connector(s)
PORTS
RS-232: On a 3–pin terminal block connector
USB: On a female micro USB connector for firmware upgrade
VIDEO
Max Bandwidth: 18Gbps
Max Resolution: 4096x2160@60Hz 4K@60 (4:4:4)
Compliance: HDMI 2.0 and HDCP 2.2
EXTENSION LINE
Optical Fiber: Multi–mode (MM) or single–mode (SM)
Optical Module: Kramer 10Gbps SFP+ IEEE 802.3ae compliant modules (MM is included)
MULTI-MODE LINE
Compliance: G.651.1 OFNR fiber
Max Reach over OM3 MM Fiber: 3km (1.8 miles)
SINGLE-MODE LINE
Compliance: G.652D OFNR fiber
Max Reach over OS1 SM Fiber: 33km (20.5 miles)
EXTENDED RS-232
Baud Rate: 300 to 115200
USER INTERFACE
Indicators: Source detection, sink detection, optical link and power LEDs
Controls: Reset button
POWER
Consumption: 480mA
Source: 12V DC, 2A
ENVIRONMENTAL CONDITIONS
Operating Temperature: 0° to +40°C (32° to 104°F)
Storage Temperature: –40° to +70°C (–40° to 158°F)
Humidity: 10% to 90%, RHL non–condensing
REGULATORY COMPLIANCE (STANDARDS COMPLIANCE)
Safety: CE, UL
Environmental: RoHs, WEEE
ENCLOSURE
Size: Tool
Type: Aluminum
Cooling: Convection ventilation
ACCESSORIES
Included: MM SFP+ transceiver, power adapter, power cord, mounting bracket set
PRODUCT DIMENSIONS
12.00cm x 7.15cm x 2.44cm (4.72" x 2.81" x 0.96" ) W, D, H
PRODUCT WEIGHT
0.2kg (0.5lbs) approx.
Kramer EXT3-H-POE-R 4K60 4:4:4 HDR HDMI Receiver with bidirectional PoE, RS232 & IR over Long-Reach HDBaseT
HDBaseT 3.0 receiver
Up to 40m (130ft) at 4K@60Hz (4:4:4)
Up to 70m (230ft) at up to 4K@30Hz (4:4:4) or 1080P
Symmetrical PoE
Bidirectional RS–232 & IR control extension
Kramer EXT3-H-POE-T 4K60 4:4:4 HDR HDMI Transmitter with RS–232 & IR over Long–Reach HDBaseT
HDBaseT 3.0 transmitter
Up to 40m (130ft) at 4K@60Hz (4:4:4)
Up to 70m (230ft) at up to 4K@30Hz (4:4:4) or 1080P
Symmetrical PoE
Bidirectional RS–232 & IR control extension
Kramer EXT3-H-R 4K60 4:4:4 HDR HDMI Receiver with RS–232 & IR over Long–Reach HDBaseT
HDBaseT 3.0 receiver
Up to 40m (130ft) at 4K@60Hz (4:4:4)
Up to 70m (230ft) at up to 4K@30Hz (4:4:4) or 1080P
Bidirectional RS–232 & IR control extension
Kramer EXT3-H-T 4K60 4:4:4 HDR HDMI Transmitter with RS-232 & IR over Long–Reach HDBaseT
HDBaseT 3.0 transmitter
Up to 40m (130ft) at 4K@60Hz (4:4:4)
Up to 70m (230ft) at up to 4K@30Hz (4:4:4) or 1080P
Bidirectional RS–232 & IR control extension
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