User Manual
Table Of Contents
- Preface Overview
- About this guide
- Additional documentation
- Typographical conventions this guide uses
- Where to go for more help
- Chapter overview
- System overview
- Installation overview
- Planning the installation
- Chapter overview
- Before you begin
- Using Terminal Emulation or Telnet to help configure base stations
- Setting base station configuration parameters
- Chapter overview
- Before you begin
- Cell wiring
- Base station connectors
- Mounting the base station
- Connecting the antenna to the base station
- Connecting the GPS equipment to a base station
- Connecting to the backbone network
- Powering base stations
- Verifying system operation
- Appendix overview
- Appendix overview
3-26 Configuring, Installing, and Using Base Stations
• Expose the unit to the southern portion of the sky. GPS satellites move
generally from the southwest to the northeast.
Connecting the GPS unit to the base station
One GPS unit can support numerous base stations in the same cell.
Use the GPS-to-base station cable to attach the GPS unit to one of the base
stations in the cell.
To connect the cable to the GPS unit and to the base station (both of which have
already been installed and mounted):
1 Connect the cable’s molded, circular female connector to the GPS unit.
2 Install the lightning protection equipment. It is recommended that the lightning
protector be installed at the smart antenna end of the time source interface
cable. You must then directly connect the protection ground wire to a properly
grounded equipment chassis or antenna mast.
3 After connecting the cable to the GPS unit, run the cable to the base station.
Plug the cable’s other end into the base station’s GPS connector.
4 Secure the cable that you just ran to an appropriate support structure. Coil and
tie any excess cable.
5 The GPS unit receives its power from the base station. The base station supplies
power to the GPS device, which uses 18 volts DC at 150 milliamperes.
6 So that the remaining base stations in the cell can receive a GPS signal, connect
a base station adjacent to the base station you just connected to the GPS unit.
Continue to use the daisy chain wiring scheme to connect the remaining base
stations, until all of the base stations within the cell are connected to each other.
On the last base station in the daisy chain, connect the load termination on the
open GPS connection.
Connecting to the backbone network
The base station connects to a TVS module. You then connect the TVS module to
your network. Typically, base stations connect to a level 2 switch at the cell site,
using a 10BaseT connection. The switch controls the base station data traffic to
and from the backbone network.
Connect the switch to the backhaul network using the appropriate cabling.