4K60 4:2:0 HDMI/USB/Eth/Cntl over Ultra?Reach HDBT Fiber Tx

The Kramer 691 is a high-performance HDBaseT 2.0 fiber optic transmitter built to extend a complete group of AV, data, and control signals over very long distances. It accepts 4K60Hz (4:2:0) HDMI together with USB, Ethernet, RS-232, IR, and stereo audio, converts those inputs into an HDBaseT 2.0 signal, and sends that signal over multimode or single-mode fiber to a compatible receiver. The receiver then restores the individual HDMI, USB, Ethernet, RS-232, IR, and stereo audio signals.

Ideal Use Cases

Use the 691 where a source and destination are separated by more distance than a local AV connection can address while several signal types must travel together. It is suited to long-reach systems that need 4K video plus USB peripherals, network connectivity, serial control, IR control, and embedded stereo audio. Single-mode fiber support makes it especially relevant to routes requiring the stated maximum reach of up to 33km (20.5 miles). Multimode support provides another fiber option when that medium matches the planned infrastructure.

Why Choose This Model

The 691 combines video, data, control, and audio extension within one HDBaseT 2.0 fiber transmission platform. Rather than addressing HDMI, USB, Ethernet, RS-232, IR, and stereo audio as separate signal categories, the transmitter converts the available inputs for transport over the fiber connection. Its support for both multimode and single-mode fiber gives integrators flexibility when matching the transmitter to an existing or planned fiber environment. The included multimode OSP+ transceiver supports multimode configurations, while the unit can also operate with a single-mode OSP+ transceiver and corresponding fiber.

Installation and Integration

A complete link uses the 691 transmitter, a suitable multimode or single-mode fiber connection, and a compatible receiver. Source-side HDMI, USB, Ethernet, RS-232, IR, and stereo audio signals are connected to the transmitter as required by the system. The 691 converts those inputs into an HDBaseT 2.0 signal for transmission through the fiber path. At the destination, the compatible receiver converts the transported signal back into its individual formats.

Fiber and transceiver selection should match the intended installation. The transmitter includes a multimode OSP+ transceiver. When the design calls for single-mode operation, the 691 can be used with a single-mode OSP+ transceiver and single-mode fiber. The maximum stated extension distance of 33km applies to single-mode fiber and supports video at up to 4K@60Hz with 4:2:0 color sampling.

Performance Highlights

The 691 supports 4K60Hz HDMI transmission with 4:2:0 color sampling and a stated bandwidth of 10Gbps. Over single-mode fiber, it can extend video signals up to 33km, equivalent to 20.5 miles. That combination addresses systems in which both resolution and transmission distance are central requirements.

• Up to 4K@60Hz video with 4:2:0 color sampling
• 10Gbps stated bandwidth
• Up to 33km (20.5 miles) over single-mode fiber
• HDMI, USB, Ethernet, RS-232, IR, and stereo audio transport
• Support for multimode and single-mode fiber

What Makes It Different

The distinguishing capability of the 691 is its combination of ultra-reach fiber transmission and broad signal support. The same transmitter handles 4K HDMI, USB, Ethernet, RS-232, IR, and stereo audio rather than limiting the link to video alone. HDBaseT 2.0 provides the transport format, while fiber supplies the physical connection to the compatible receiver. Its dual support for multimode and single-mode fiber also allows the product to serve more than one fiber configuration without changing the transmitter model.

Final Assessment

The Kramer 691 is a focused choice for long-distance 4K signal extension when video must be accompanied by USB, Ethernet, serial control, IR, and stereo audio. Its 4K60Hz 4:2:0 capability, 10Gbps bandwidth, multimode and single-mode compatibility, included multimode OSP+ transceiver, and single-mode reach of up to 33km define a transmitter designed for demanding fiber-based AV links.