Kramer 691 HDBT 2.0 Optical Transmitter

Product Overview

The Kramer 691 is an HDBaseT 2.0 fiber optic transmitter for ultra-reach extension of 4K@60Hz (4:2:0) HDMI, USB, Ethernet, RS-232, IR, and stereo audio signals over multi-mode or single-mode fiber optic cable. AV integrators and system designers deploy the 691 in installations where the display is too far from the source for copper HDBaseT — campus buildings, performance venues, government facilities, and inter-building AV links — reaching up to 33km (20.5 miles) over single-mode fiber at full 4K resolution. It converts all input signals into a single HDBaseT 2.0 fiber signal for transmission to a compatible receiver such as the Kramer 692, which converts back to HDMI, USB, Ethernet, RS-232, IR, and stereo audio at the far end. The 691 ships with a multimode OSP+ SFP+ transceiver and supports both multi-mode and single-mode fiber via interchangeable Kramer OSP pluggable SFP+ units.

Product Description

The 691 accepts one HDMI 2.0 input with HDCP 1.4 compliance and passes all HDMI features including deep color, x.v.Color, lip sync, Dolby TrueHD, DTS-HD, 2K, 4K, and 3D. I-EDIDPro Intelligent EDID Processing ensures reliable EDID and CEC pass-through from the display to the source across the fiber link. USB 2.0 extension supports HID peripherals such as keyboards and mice at the remote end; high-bandwidth USB devices such as isochronous cameras are subject to HDBaseT bandwidth management limitations. Ethernet extension flows bidirectionally for IP device control and network-enabled display management across the fiber link. RS-232 extension supports bidirectional serial control of remote devices at the display end. Stereo analog audio can be embedded into the HDBaseT 2.0 signal from a 3.5mm input for rooms with separate audio systems. The 691 uses Kramer's pluggable OSP SFP+ transceiver system — the included multimode transceiver covers runs up to 300m over OM3 fiber, while a separately available single-mode OSP SFP+ extends to 33km. Only Kramer-certified OSP SFP+ units should be used to maintain specified performance and warranty.

Key Features

• 4K@60Hz (4:2:0) HDBaseT 2.0 Fiber Transmitter — Extends HDMI, USB, Ethernet, RS-232, IR, and audio over multi-mode or single-mode fiber.
• Up to 33km over Single-Mode Fiber — Ultra-reach extension for inter-building and campus AV distribution at full 4K resolution.
• Interchangeable OSP SFP+ Transceivers — Ships with multimode transceiver; accepts Kramer single-mode OSP SFP+ for extended reach.
• HDBaseT 2.0 Certified — Compatible with any market-available HDBaseT-compliant receiver including the Kramer 692.
• USB 2.0 Bidirectional Extension — Supports HID peripherals (keyboard, mouse) at the remote display end over the fiber link.
• Ethernet Extension — Bidirectional Ethernet for IP device management across the fiber run.
• RS-232 Bidirectional Extension — Serial control of remote devices at the display location.
• Stereo Audio Embedding — 3.5mm analog audio input embeds audio into the HDBaseT 2.0 stream.
• I-EDIDPro EDID Processing — Intelligent EDID and CEC pass-through for plug-and-play source/display compatibility.

Typical Applications

• Campus and inter-building 4K AV distribution over fiber infrastructure
• Government and military facility long-distance AV extension
• University building-to-building AV distribution
• Large auditorium and performing arts venue ultra-reach AV
• Broadcast facility fiber-based AV signal distribution
• Hospital and healthcare campus AV over existing fiber

Technical Specifications

Frequently Asked Questions