User's Manual
Table Of Contents
- SECTION 1 General Information
- SECTION 2 InterReach Fusion System Description
- SECTION 3 Fusion Main Hub
- SECTION 4 Fusion Expansion Hub
- SECTION 5 Remote Access Unit
- SECTION 6 Designing a Fusion Solution
- 6.1 Overview
- 6.2 Downlink RSSI Design Goal
- 6.3 Maximum Output Power per Carrier
- 6.3.2 700 MHz (Upper C)
- 6.4 System Gain
- 6.5 Estimating RF Coverage
- 6.6 Link Budget Analysis
- 6.6.1 Elements of a Link Budget for Narrowband Standards
- 6.7 Optical Power Budget
- 6.8 Connecting a Main Hub to a Base Station
- 6.8.1 Uplink Attenuation
- 6.8.2 RAU Attenuation and ALC
- SECTION 7 Installing Fusion
- 7.1 Installation Requirements
- 7.1.2 Cable and Connector Requirements
- 7.1.3 Distance Requirements
- 7.2 Safety Precautions
- 7.2.1 Installation Guidelines
- 7.2.2 General Safety Precautions
- 7.2.3 Fiber Port Safety Precautions
- 7.3 Preparing for System Installation
- 7.3.1 Pre-Installation Inspection
- 7.3.2 Installation Checklist
- 7.3.3 Tools and Materials Required
- 7.3.4 Optional Accessories
- 7.4 Fusion Installation Procedures
- 7.4.1 Installing a Fusion Main Hub
- 7.4.3 Installing RAUs
- 7.4.4 Configuring the System
- 7.5 Splicing Fiber Optic Cable
- 7.6 Interfacing the Fusion Main Hub to an RF Source
- 7.6.1 Connecting a Single Fusion Main Hub to an RF Source
- 7.7 Connecting Contact Alarms to a Fusion System
- 7.8 Alarm Monitoring Connectivity Options
- 7.8.1 Direct Connection
- 7.8.5 Ethernet RF Modem
- SECTION 8 Replacing Fusion Components
- SECTION 9 Maintenance, Troubleshooting, and Technical Assistance
- APPENDIX A Cables and Connectors
- APPENDIX B Compliance
- APPENDIX C Faults, Warnings, Status Tables for Fusion, Fusion Wideband, Fusion SingleStar
Fusion Installation Procedures
7-34 InterReach Fusion Installation, Operation, and Reference Manual
CONFIDENTIAL D-620610-0-20 Rev F
cause the 850 Cellular uplink automatic level control (ALC) circuitry in the RAU to
engage and thereby reduce uplink gain.
To prevent either of these conditions, use the following guidelines:
• In-band 800 iDEN intermodulation products < -90dBm
• Lower frequency 800 iDEN signals < –30dBm for Fusion
Given a typical DAS configuration (4 iDEN carriers, omni-directional antennas, line
of sight), these guidelines translate to an antenna spacing (d1) of 6 – 9 meters.
850 MHz Cellular Downlink and 900 MHz iDEN Uplink
A 2 MHz frequency gap (896 – 894 MHz) separates the 850 Cellular downlink and
900 iDEN uplink frequency bands. Because of this narrow spacing, 850 Cellular
downlink intermodulation products may fall within the 900 iDEN uplink band. In
addition, 850 Cellular downlink signals near the upper edge of the band at 894 MHz
may cause the 900 iDEN uplink ALC to engage and thereby reduce uplink gain.
To prevent either of these conditions, use the following guidelines:
• In-band 850 Cellular intermodulation products < -90dBm
• Upper frequency 850 Cellular signals < –30dBm for Fusion
Given a typical DAS configuration (6 CDMA carriers for Fusion, omni-directional
antennas, line of sight), these guidelines translate to an antenna spacing (d2) of 8-14
meters.
Spacing between RAUs FSN-8519-1 and FSN-809019-2 should be in a range of from
8 to 14 meters.
Connecting the Antenna to the RAU
Connect a passive multi-band antenna to the N connector on the RAU using coaxial
cable with the least amount of loss possible.
CAUTION: Firmly hand-tighten the N connector – DO NOT
over-tighten the connector.
Connecting the CATV Cable
Considerations:
• Verify that the cable has been tested and the test results are recorded. This informa-
tion is required for the As-Built Document.
• Verify that only captive centerpin 75 Ohm Type-F connectors are used on the solid
copper center conductor CATV 75 Ohm cable.
• Verify that the CATV cable is labeled with: