Instruction manual

2-6
BreezeACCESS Version 4.3 System Description
Manual Revision: 4.0
Figure 2-3: BreezeACCESS GU-A-BS System Components
The BreezeACCESS BS-GU module is designed to be inserted into the
BS-SH 19” base station chassis to provide hopping synchronization
signals to the BS-AU Access Unit modules. The card uses timing signals
derived from signals received from the GU-RA GPS antenna. These
signals, generated by the GPS global satellites network, allow accurate
synchronization of systems located in different locations. Any number of
base stations can be synchronized, guaranteeing that all AUs (Access
Units) hop in unison from frequency to frequency. In addition, the GPS
signal insures that all units begin their pre-defined hopping sequence at
the same time.
The BS-GU module is connected to the GU-RA GPS antenna via a cable
that carries power from the module to the antenna, timing signals from
the antenna to the module and management signals between the two
units.
The BS-GU also provides synchronization signals to other BS-GU
modules by daisy-chaining any number of modules, using a single
GU-RA GPS antenna to synchronize multiple AUs in several collocated
BS-SH chassis.
When a GU-RA GPS antenna is not connected to the module (or if the
connected GPS antenna is not functioning properly), the BS-GU module
provides self-generated synchronization signals to all AUs.