User's Manual
Table Of Contents
- SECTION 1 General Information
- SECTION 2 InterReachâ„¢ 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
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PRELIMINARY System Connectivity
2.5 System Connectivity
The double star architecture of the Unison system, illustrated in the following figure,
provides excellent system scalability and reliability. The system requires only one
pair of fiber for 8 antenna points. This makes any system expansion, such as adding
an extra antenna for additional coverage, potentially as easy as pulling an extra
twisted pair (instead of pulling additional fiber).
Figure 2-4 Unison’s Double Star Architecture
Main Hub
RS-232
PORT 1 PORT 2 PORT 3 PORT 4
Expansion Hub
Expansion Hub
Fiber
Expansion Hub
Expansion Hub
Cat-5/6Cat-5/6 Cat-5/6
up to 8 RAUs per Expansion Hub
RAU RAU RAU