User Manual
General Information:
Communication Component Inc.’s Cell Extender products are designed to extend the range and
coverage area of CDMA/TDMA type base stations in PCS wireless communications. Up-Link
loading equation shows that the number of subscribers is directly proportional to Eb/Io ratio and
also depends on the receiver noise to interference ratio. The Cell Extender boosts the output
power of the base station and, by increasing its ERP, increases the first parameter. It also
minimizes receiver noise level to decrease the second parameter. As a result of these
improvements, the number of subscribers in each sector where the cell extender is used, is
increased allowing for cost efficient implementation of high capacity radio networks. It also
provides low-noise amplification of the receive signal to improve system sensitivity and to
maintain a balanced link between the transmit and receive signals.
The Cell Extender is especially helpful on sites at the fringe of the covered territory, highway
sites, or any site with tall tower, and can be cost efficient and much more reliable alternative to
the repeater or TMA implementation.
The Cell Extender is easy to install, requires no maintenance, and is fully compatible with any
CDMA Base Station equipment. The Cell Extender offers maximum installation flexibility by
allowing to be installed at the bottom of the tower or on the top of the tower.
Cell Extender provides additional failure protection by including the by-pass circuitry which is
activated in case of the HPA or LNA failure. In this case the base station can continue to operate
with slightly degraded parameters.
• Configuration 1 - The Cell Extender is mounted on the tower structure, in close proximity to
the antenna. This configuration is ideal for environments where AC lines are not easily available
on the mounting structure. For this configuration, the Cell Extender should be ordered with the
Remote Power Option which includes a Bias-t and Remote Power Supply module to provide DC
power to the Cell Extender over the coaxial cable.
• Configuration 2- The Cell Extender is installed at the BTS level. This is intended for
applications where it is impractical to install any equipment other than the antenna on the
mounting structure.
Communication Components Inc.Communication Components Inc.
Communication Components Inc.Communication Components Inc.