ATEN CE840 USB True 4K HDMI HDBaseT 3.0 KVM Extender
Overview
The CE840 is a USB KVM extender that pushes 4K×2K @ 60Hz (4:4:4) video and USB keyboard/mouse control up to 100 meters over a single Cat 6a cable using HDBaseT 3.0. That 100-meter reach makes it the right pick for control rooms, broadcast suites, or server-room deployments where the operator console must sit far from the compute hardware — eliminating the signal degradation and latency you'd get from long HDMI runs or fiber converters. The CE840R remote unit connects back to the host over a single RJ-45 (HDBaseT) link, keeping cabling clean and keeping 4:4:4 chroma intact for color-critical workflows. It also handles 2560×1440 @ 144 Hz for operators who need high-refresh display performance at the remote console.
Compatibility
The CE840 is designed to pair with the CE840 local transmitter unit as a CE840R remote receiver within the ATEN CE800-series KVM extender family. Cable compatibility is specific: HDBaseT 3.0 requires Cat 6a U/FTP (unshielded twisted pair) or higher — Cat 5e and Cat 6 will not support the full 100m 4K spec. ATEN's own 2L-29330 Cat 6a cable is the validated choice if you want to eliminate cable-quality variables. For USB authority management, the extender supports three remote USB keyboard/mouse authority indicators and includes a dedicated authority-selection switch, making it compatible with multi-user KVM switching setups where console ownership needs to be explicit.
Installation Notes
Cable grade is non-negotiable: only HDBaseT 3.0 certified Cat 6a U/FTP or better maintains 4K@60Hz (4:4:4) at 100m — verify your structured cabling before committing to this extender. Firmware upgrades are handled via a slide switch on the remote unit; no software tool is required. The CE840R is rack-mountable, consistent with the standard rack-mount accessories in ATEN's extender line. Operate within 0–80% RH non-condensing humidity limits — unsuitable for unconditioned outdoor or high-condensation environments without additional enclosure protection. Review the KVM switches in the CE800 family if your deployment requires local-side switching in addition to the remote extension.
