User's Manual

Table Of Contents
Fusion Wideband Expansion Hub
Page 42 InterReach Fusion Wideband Installation, Operation, and Reference Manual
© 2015 TE Connectivity D-620616-0-20 Rev K TECP-77-044 Issue 9 March 2015
EXPANSION HUB OVERVIEW
The Expansion Hub acts an interface between the Main Hub and the Remote Access Unit(s) by
converting optical signals to electrical signals and vice versa, as shown in Figure 10. It also
supplies control signals and DC power
to operate the RAUs, and passes status information from
the RAUs to the Main Hub.
Figure 10.
Expansion Hub in a Fusion Wideband System
Figure 11 on page 43 shows a block diagram for the Expansion Hub within a Fusion system.
Downlink Path: The Expansion Hub receives downlink (Band 1, 2, and 3) optical signals from the Main Hub using fiber optic
cable. It converts the signals to electrical and sends them to up to eight Remote Access Units (RAUs) using CATV cables. The
Expansion Hub also receives configuration information from the Main Hub using the fiber optic cable and relays it to the RAUs
using CATV cable.
Uplink Path: The Expansion Hub receives uplink (Band 1, 2, and 3) IF signals from up to eight RAUs using CATV cables. It
converts the signals to optical and sends them to a Main Hub using fiber optic cable.
The Expansion Hub also receives RAU status information using CATV cable and sends it and its own status information to the
Main Hub using the fiber optic cable.
RF1, 2, and 3
Downlink to Main Hub
Uplink from Main Hub
RF1, 2, and 3
Downlink to Main Hub
Uplink from Main Hub
Fusion Wideband
Main Hub
Fusion Wideband
Main Hub
RAU