The Kramer 691 4K60 4:2:0 HDMI MM/SM Fiber Optic Transmitter is a cutting-edge HDBaseT 2.0 solution designed for ultra-reach extension of high-quality video and audio signals. This versatile transmitter supports HDMI, USB, Ethernet, RS-232, IR, and stereo audio embedding over both multi-mode and single-mode fiber optic cables, making it an ideal choice for professional AV installations. With its advanced features, including intelligent EDID processing and bidirectional data flow, the Kramer 691 ensures seamless connectivity and optimal performance in a variety of applications.
Kramer 691 Key Features
- High Performance Standard Fiber Extender: This HDBaseT 2.0 fiber transmitter allows ultra-reach signals over multi-mode or single-mode optical fiber, compatible with any HDBaseT-compliant extension product.
- HDMI Signal Extension: Supports HDCP 1.4, deep color, x.v.Color, lip sync, and uncompressed audio channels, ensuring high-quality video playback at up to 4K@60Hz resolution.
- I-EDIDPro Kramer Intelligent EDID Processing: Ensures plug-and-play operation by intelligently processing and passing through EDID data between the HDMI source and display.
- USB Extension: Allows bidirectional data flow for USB 2.0, enabling seamless connection of peripheral devices like mice and keyboards over extended distances.
- Ethernet Extension: Facilitates up to 100Mbps Ethernet connectivity for device control and LAN communication, enhancing network capabilities.
- Bidirectional RS-232 Extension: Supports data transmission in both directions for device control, simplifying integration with existing systems.
- Bidirectional Infrared Extension: Enables remote control of devices at either end of the extended line, providing flexibility in operation.
- Audio Embedding: Allows selectable analog audio input to be embedded into the HDMI signal, enhancing audio control during presentations.
- Cost-Effective Maintenance: Status LED indicators and remote device management streamline troubleshooting and firmware upgrades, ensuring reliability.
- Easy Installation: The half 19” 1U rack-mountable design enables efficient space usage by allowing side-by-side mounting of two units.
Kramer 691 Detailed Specifications
| Feature | Details |
|---|---|
| Video Resolution | Up to 4K@60Hz (4:2:0) |
| Transmission Distance | Up to 33km (20.5 miles) over single-mode fiber |
| HDMI Compliance | HDCP 1.4 compliant |
| USB Support | USB 2.0, bidirectional |
| Ethernet Support | Bidirectional, up to 100Mbps |
| Audio Input | Selectable unbalanced stereo audio |
| Control Interfaces | RS-232, IR |
| Form Factor | Half 19” 1U rack-mountable, fan-less |
| Management | Remote management via web UI, RS-232, mini-USB |



















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