Kramer 691 4K60 4:2:0 HDMI MM/SM Fiber Optic Transmitter with USB, Ethernet, RS-232, IR & Stereo Audio over Ultra-Reach HDBaseT 2.0

The Kramer 691 is a high-performance fiber optic transmitter designed for extending 4K60 4:2:0 HDMI signals, along with USB 2.0, Ethernet, RS-232, IR, and stereo audio, over multi-mode or single-mode fiber. It supports HDCP 2.2 and features Kramer's Ultra-Reach HDBaseT 2.0 technology for reliable long-distance transmission.

Advantages

This transmitter enables seamless extension of 4K video and control signals up to 10 km over single-mode fiber, making it ideal for large-scale AV installations. Its compact MegaTOOLS® enclosure allows for flexible mounting options, and the integrated USB, Ethernet, and control ports simplify connectivity for interactive displays and digital signage.

Suitable for

• Corporate boardrooms and conference rooms requiring long-distance 4K signal distribution
• Educational campuses and lecture halls with centralized AV equipment
• Digital signage and retail displays needing reliable fiber optic extension
• Medical imaging and simulation environments where signal integrity is critical

Key specifications

• Video Resolution: Up to 4K@60Hz (4:2:0)
• HDMI Compliance: HDMI 2.0, HDCP 2.2
• Max Data Rate: 10.2 Gbps (3.4 Gbps per graphic channel)
• Fiber Type: Multi-mode (MM) and Single-mode (SM)
• Fiber Connector: 2x LC (Duplex)
• Max Reach (MM Fiber): 100m (330ft) with OM3 fiber
• Max Reach (SM Fiber): 10km (6.2 miles)
• Audio Support: HDMI Embedded, Unbalanced Stereo Audio
• USB Support: USB 2.0 (up to 12Mbps)
• Ethernet Support: 100BaseT
• Control Ports: RS-232, IR
• Power Source: 5V DC
• Enclosure Type: Kramer MegaTOOLS®
• Input Ports (Transmitter): 1x HDMI, 1x USB-B, 1x 3.5mm Audio, 1x IR, 1x RS-232 (3-pin terminal block), 1x RJ-45 (Ethernet)
• Output Ports (Transmitter): 2x LC Fiber Optic, 1x RJ-45 (Ethernet loop)
• EDID Management: Yes
• Color Depth: 8-bit

Recommendations

For optimal performance, use with Kramer's compatible fiber optic receiver and high-quality OM3 multi-mode or OS2 single-mode fiber cables. Ensure proper termination of LC connectors and clean fiber ends to maintain signal integrity.