4K60 4:4:4 HDR HDMI Transmitter with RS 232 & IR over Long Reach HDBaseT

The Kramer EXT3-H-POE-T is a high-performance HDBaseT 3.0 transmitter designed to extend 4K60 4:4:4 HDR HDMI video together with RS-232 and IR control signals over twisted-pair cabling. With 18Gbps bandwidth and support for transmission distances up to 40m over Kramer copper cables, it provides a focused solution for systems that require high-resolution video and control connectivity between separated locations.

Ideal Use Cases

This transmitter is suited to AV installations in which HDMI source equipment must be separated from a remote display or control endpoint. Its combination of video, RS-232 and IR transport makes it useful when the installation requires both high-quality image delivery and remote device control across the same twisted-pair link.

• Systems requiring 4K@60Hz video with 4:4:4 color sampling and HDR support.
• Long-reach installations extending signals up to 40m over Kramer copper cables.
• AV configurations that need RS-232 and IR signals carried alongside HDMI video.
• Projects integrating the transmitter with standard HDBaseT-compliant extenders.

Why Choose This Model

The EXT3-H-POE-T combines HDBaseT 3.0 transmission with the video performance required for detailed 4K content. Its support for 4K@60Hz 4:4:4 preserves full color information at a 60Hz refresh rate, while HDR compatibility accommodates supported high-dynamic-range material. The specified 18Gbps bandwidth aligns with its 4K60 signal capability. By extending HDMI, RS-232 and IR signals over twisted pair, the unit also consolidates video and control transport into a practical long-reach connection.

Compatibility with standard HDBaseT-compliant extenders gives system designers an additional integration option. That compatibility is specified at resolutions up to 4K@60Hz 4:4:4, allowing the transmitter to be considered for both matched and standards-compliant HDBaseT configurations.

Installation and Integration

Installation centers on connecting the HDMI and control signals at the transmitter location and routing the HDBaseT 3.0 signal over twisted-pair cabling. When used with Kramer copper cables, the specified extension distance is up to 40m. Actual system planning should account for the required distance, cable construction and the capabilities of the connected HDBaseT endpoint.

The source data lists Kramer C-UNIKAT CAT6A U/FTP cable assemblies, BC-UNIKAT CAT6A U/FTP bulk cable and BC-DGKat623 four-pair U/FTP bulk cable among the associated cabling selections. It also identifies HDMI cable options and IR emitter or receiver cables for supporting source, display and control connections. These listed cable families provide installers with choices for different run lengths and installation formats; no accessories or in-box contents are specified for this transmitter.

Performance Highlights

• Supports HDMI video resolutions up to 4K@60Hz with 4:4:4 color sampling.
• Handles HDR video and provides a maximum specified refresh rate of 60Hz.
• Offers 18Gbps bandwidth for the stated 4K60 video format.
• Extends HDMI, RS-232 and IR signals over twisted-pair cabling.
• Reaches up to 40m when used over Kramer copper cables.
• Works with standard HDBaseT-compliant extenders at up to 4K@60Hz 4:4:4.

These capabilities address both image performance and control transport. Full 4:4:4 sampling is especially relevant when the signal contains fine color detail, while the integrated RS-232 and IR paths allow compatible equipment to be controlled without establishing separate long-distance control runs.

What Makes It Different

The defining combination is HDBaseT 3.0, 4K60 4:4:4 HDR video and two established control formats in one transmitter. Rather than serving only as an HDMI extension point, the EXT3-H-POE-T carries RS-232 and IR signals over the same twisted-pair medium used for video transport. Its stated interoperability with standard HDBaseT-compliant extenders further distinguishes it as an integration-oriented model rather than a transmitter restricted solely to one stated endpoint configuration.

Final Assessment

The EXT3-H-POE-T is a purpose-built choice for extending high-bandwidth HDMI and control signals across a long-reach HDBaseT connection. Its core strengths are clearly defined: HDBaseT 3.0 transport, 18Gbps bandwidth, 4K@60Hz 4:4:4 HDR support, RS-232 and IR extension, and a range of up to 40m over Kramer copper cables. For installations centered on those requirements, it offers a concise set of video, distance and control capabilities.