User Manual

Users Guide - Andrew InCell™ Fiber Optic Distributed Antenna System
1-6
Figure 1-1. InCell™ System Showing CDU and One ERAU
The InCell DAS is designed to interface to the external wireless infrastructure in one of two
ways:
• The InCell DAS can directly interface to an indoor base station through a coax jumper
• The InCell DAS can interface to outdoor base stations by means of an off-air antenna
interface consisting of a donor antenna, cables and a bi-directional amplifier.
The InCell DAS system converts the wireless signals from the base station and the mobile phone
into optical signals, uses low loss fiber optic cables to distribute the optical signals throughout
the building, and then converts the signals back to RF signals for wireless transmission.
The InCell DAS is designed to cover large areas with a minimum amount of hardware and
cabling, reducing system cost, installation time and maintenance. Very large InCell systems may
be built by combining multiple CDUs using standard power dividers. A system with 64 CDUs
can support 384 remote antennas.
Unlike other competing products, this product is designed for multi-operator, multi-service
capabilities with higher output levels and lower system sensitivities. This equates to greater
coverage range per antenna unit and hence lower implementation costs.