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USB System Architecture
A USB system architecture refers to the physical bus topology of USB devices connected
to a host device. USB devices include USB hubs, USB peripheral devices, or compound
devices (devices with a combination of USB hubs and USB peripheral devices built into it).
The system is organized in a tiered star topology to prevent multiple or circular attachments
to the bus (see
the host device. Per USB specifications, there are seven supported tiers, starting with the
host device (or root hub) occupying the first tier.
NOTE: Do not connect more than five daisy-chained hubs to the root hub. The
Automatic color bit depth management — Automatically adjusts color bit depth
based on the display EDID, preventing color compatibility conflicts between source and
display.
Supports multiple embedded audio formats — The UCS 303 is compatible with
a broad range of multi-channel audio signals, providing reliable operation with HDMI
sources.
Power Save Mode — Can be placed in a low power standby state to conserve energy
when not in use.
Front panel security lockout — This feature locks out all front panel functions; all
functions however, are available through Ethernet or USB control.
Built‑in web pages — Enable the use of a standard browser for device monitoring and
troubleshooting over an intuitive Web interface.
RS‑232 display control port — Enables the use of serial commands to control an
attached display.
Front panel USB‑C configuration port — Enables easy system configuration without
having to access the rear panel.
Front panel LED indicators for signal presence, HDCP status, and power —
Provides visual indication of system status for real-time feedback and monitoring of key
performance parameters.
Easy setup and commissioning with the Extron PCS program — Conveniently
configure multiple products using a single software application.
Rack‑mountable metal enclosure — The UCS 303 features a 1U, half rack wide
metal enclosure with integrated rack mounts.
Includes LockIt HDMI cable lacing brackets to secure HDMI connectors in
place
Internal Extron Everlast power supply — Provides worldwide power compatibility,
with high-demonstrated reliability and low power consumption for reduced operating
cost. The Everlast Power Supply is covered by a 7-year parts and labor warranty.
figure 1
on the next page) Each tier represents a degree of separation from
architecture does not support peripheral devices connected to USB hubs occupying
the seventh tier.
UCS 303 • Introduction
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