User's Manual
Table Of Contents
- SECTION 1 General Information
- SECTION 2 InterReach™ Unison System Description
- SECTION 3 Unison Main Hub
- SECTION 4 Unison Expansion Hub
- SECTION 5 Unison Remote Access Unit
- SECTION 6 Installing Unison Components
- 6.1 Installation Requirements
- 6.2 Safety Precautions
- 6.3 Preparing for System Installation
- 6.4 Unison Component Installation Procedures
- 6.5 Starting and Configuring the System
- 6.6 Interfacing a Main Hub to a Base Station or Roof-top Antenna
- 6.7 Connecting Contact Alarms to a Unison System
- SECTION 7 Installing and Using the AdminManager Software
- SECTION 8 Designing a Unison Solution
- 8.1 Maximum Output Power per Carrier at RAU
- 8.2 Estimating RF Coverage
- 8.3 System Gain
- 8.4 Link Budget Analysis
- 8.4.1 Elements of a Link Budget for Narrowband Standards
- 8.4.2 Narrowband Link Budget Analysis for a Microcell Application
- 8.4.3 Elements of a Link Budget for CDMA Standards
- 8.4.4 Spread Spectrum Link Budget Analysis for a Microcell Application
- 8.4.5 Considerations for Re-Radiation (over-the-air) Systems
- 8.5 Optical Power Budget
- 8.6 Connecting a Main Hub to a Base Station
- 8.7 Designing for a Neutral Host System
- SECTION 9 Replacing Unison Components in an Operating System
- SECTION 10 Maintenance, Troubleshooting, and Technical Assistance
- APPENDIX A Cables and Connectors
- APPENDIX B Compliance
- APPENDIX C Glossary
PN 8700-10 InterReach Unison User Guide and Reference Manual 4-1
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PRELIMINARY
SECTION 4
Unison Expansion Hub
The Expansion Hub interfaces between the Main Hub and the Remote Access Unit(s)
by converting optical signals to electrical signals. It also supplies the DC power to
operate the Remote Access Unit(s).
Figure 4-1 Expansion Hub in a Unison System
Unison Expansion Hub
Unison Main Hub
RAU
Downlink Path: The Expansion Hub receives downlink optical signals from the Main Hub via fiber optic cable. It converts
the signals to electrical and sends them to up to eight Remote Access Units (RAUs) via Cat-5/6 cables.
Also, the Expansion Hub receives configuration information from the Main Hub via the fiber optic cable and relays configu-
ration information to the RAUs via the Cat-5/6 cable.
Uplink Path: The Expansion Hub receives uplink IF signals from up to eight RAUs via Cat-5/6 cables. It converts the sig-
nals to optical and sends them to a Main Hub via fiber optic cable.
Also, the Expansion Hub receives RAU status information via the Cat-5/6 cable and sends it and its own status information
to the Main Hub via the fiber optic cable.
Downlink to Expansion Hub
Uplink from Expansion Hub
Downlink from Expansion Hub
Uplink to Expansion Hub