User's Manual

In-building Cellular Solution for Commercial Buildings UDC Software Configuration Tool
BreezeCELL
6
BreezeCELL’s coaxial bypass has very low power consumption and can be fed from the electrical grid or
from AC voltage sent over the coax plant.
Figure 5: Bypass Infrastructure
4.3.1 Bypass Filter - Diplexer
The Bypass filter is a passive element that separates the lower frequency cable TV signals 5-860 MHz
and the higher Alvarion's frequencies of 960- 1155 MHz. The design of the bypass filter is based on a
diplexer which passes the standard cable TV signals with low attenuation and provides the required
separation between them and the Alvarion signals. For self powering systems the diplexer also samples
the AC signal that runs on the coax and uses it to power the Alvarion amplifier. A bypass filter is used
for splitting the signals before amplification and for combining the wireless and cable signals after
amplification.
4.3.2 Bi-directional Amplifier
This element compensates for the wireless signal losses that result from coax cable attenuation. The
amplifier is a low power amplifier in order to draw minimal current from the cable network.
4.4 Remote Unit
The Remote is an active unit. The purpose of the Remote is to take the RF signals that are propagated
via the cables, convert it to the native wireless frequency and transmit it in the air inside the building.
The Remote contains a miniature UDC for frequency conversion, a transmitter and an internal antenna
(external antenna connection is available as well). The Remote receives power through the cable and
can be installed as a self contained unit.
The Remote units can be single or dual band
The Remote can operate in MIMO configuration for 4G networks.
Bypass
Bypass
Alvarion’s
Amplifier
TV Amplifier