User Manual

Users Guide - Andrew InCell™ Fiber Optic Distributed Antenna System
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InCell Fiber Optic Distributed Antenna System Description
The Andrew InCell™ Fiber Distributed Antenna System is designed to provide improved RF
performance in buildings that suffer from poor wireless coverage. The InCell™ interfaces
directly with a BTS or off-air antenna and distributes RF signals to indoor antennas that provide
improved downlink and uplink performance. The InCell™ system uses multiple Enhanced
Remote Antenna Units (ERAU) located within the building to optimize communications with
handheld mobile phones and wireless office equipment. Each ERAU is connected to a central
distribution unit (CDU) by two low-loss, single mode fiber optic cables that provide downlink
signals to the remote antenna and uplink signals from the mobile phone or wireless office
equipment.
The Andrew InCell™ Fiber Optic Distributed Antenna System (DAS) is used to provide a
wireless RF network infrastructure within buildings, high rises, shopping malls, airports and
other confined structures where outside wireless signals do not penetrate or propagate well. The
InCell system allows mobile phone users to use their phones in indoor areas that previously
could not communicate with the wireless phone system.
Key InCell™ features:
• Technology transparent – InCell operates with all commonly used commercial and
essential wireless protocols (analog, TDMA, GSM, CDMA, SMR, UMTS)
• Available in most common frequency bands in single in band and dual band models
• High downlink output power and low uplink noise figure result in large coverage area for
each indoor antenna
• Predictable performance reduces design and implementation time.
• Uses single mode fiber optic cable for wide bandwidth and lowest loss
• Supports multiple frequency bands over the same fiber cable
• Easy to install, only 1 small cable required to each remote antenna head
• Flexible installation, cabling and configuration works in multiple applications
• Direct optical modulation of laser diode, no frequency up and down conversion
• Continuous system built-in-test function provides remote alarm and local indicators in
case of faults in the equipment or the fiber optic cables
The InCell DAS uses low-loss fiber optic cables to distribute the wireless signal throughout the
building to multiple remote antennas located throughout the building. The single mode fiber
optic cables used in the InCell system ensure that each of the Enhanced Remote Antenna Units
has predictable coverage area and RF performance, regardless of how far the remote antenna is
from the central RF hub. The basic InCell system consists of one Central Distribution Unit
(CDU) that interfaces to six (6) Enhanced Remote Antenna Units (ERAUs). Figure 1 shows one
CDU, and one ERAU.