User's Manual

Table Of Contents
Chapter 1 - System Description BreezeMAX Extreme
BreezeMAX Extreme 19 System Manual
1.3.5 Power Supply
The BTS is powered from a 48V DC power source. Alvarion offers the PoE (Power
over Ethernet) AC/DC power supply that can supply DC power to the BTS over
the Ethernet connection to the DATA DC IN/OUT connector (this option is
available only on the 5 GHz BTS units).
1.3.6 Radio Antennas
According to radio band and configuration, BTS units are supplied with either
integral antenna(s) or with connection(s) to external antenna(s). Alvarion offers a
range of external antennas to support various deployment and coverage needs.
1.3.7 GPS Antenna
GPS is used to synchronize the air link frames of Intra-site and Inter-site located
sectors to ensure that in all sectors the air frame will start at the same time, and
that all sectors will switch from transmit (downlink) to receive (uplink) at the same
time. This synchronization is necessary to prevent Intra-site and Inter-site sectors
interference and saturation (assuming that all neighboring sectors are operating
with the same DL/UL ratio).
Figure 1-13: Dual Sector Dual BS no Diversity Operation Mode