User Manual

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5
Enable the set airlink afc parameter. This parameter allows a base station to automatically
frequency lock to the external pulse from the GPS, which is one pulse per second.
set airlink afc enabled
6 Save changes in Flash memory by issuing the write command.
7 For changes to take effect, reboot or reset the base station’s power. To reboot, type the
following at the command prompt:
reboot
Configuring a base station to supply a time signal
There are two scenarios in which you might want to set up a base station to use internal time
synchronization.
The first is a single base station at a site that is not part of a larger system with other sites.
This base station may be set to use internal time synchronization.
The second scenario is a multiple base station site that is not part of a larger system with other
sites. One of the base stations is set as a master base station. The master base station is set for
internal time synchronization. It generates the 1-pulse-per-second (pps) for itself, and also
outputs the 1 pps pulse for the other base stations. As such, you then set the other base
stations to use external time synchronization.
To use a base-station generated time signal:
1 Connect all base stations in your cell to each other, in a daisy chain manner.
2 Supply power to the entire system, as described in the section,“Powering base stations” on
page 6-61 in this guide.
3 Configure the single base station or the master base stations to use an internal time
synchronization signal:
set airlink timing internal
4 Disable the set airlink afc parameter. You must disable this parameter, which otherwise
would allow a base station to automatically frequency lock to the external pulse from the
GPS.
set airlink afc disabled
5 Store your changes in Flash memory by issuing the write command.
6 For changes to take effect, reboot or reset the base station’s power. To reboot, type the
following at the command prompt:
reboot