Engineering Reference

Quick, trustworthy reference for the specs AV engineers look up most.

Power

PoE, PoE+, and PoE++ standards, power classes, and what each delivers to the device.

HDMI 1.4 through 2.1 — bandwidth, resolutions, and the features (HDR, VRR, eARC) each version adds.

High-bandwidth Digital Content Protection — versions, how authentication works, and the failures it causes in AV systems.

Extending HDMI, power, control, and Ethernet over a single Cat cable — 5Play, distances, and cabling requirements.

HDR10, HDR10+, Dolby Vision, and HLG — static vs dynamic metadata, and what a system needs to carry HDR.

What 4:4:4, 4:2:2, and 4:2:0 mean, why they save bandwidth, and when the difference is visible.

Multimode (OM1–OM5) vs single-mode (OS1/OS2) fiber — core sizes, distances, connectors, and where each fits in AV.

Cat5e through Cat8 — bandwidth, supported speeds, distances, shielding, and PoE considerations.