User Manual

Users Guide - Andrew InCell™ Fiber Optic Distributed Antenna System
4-8
Operation
InCell™ system operation is continuous. Andrew recommends using an uninterruptible power
supply (UPS) to provide power to the CDU and external power supply. If the system design uses
composite cable to provide power to the Enhanced Remote Antenna Units located throughout the
building, the UPS can keep the CDU and all ERAUs powered and operational during brownouts
and power outages. This is especially useful for essential communications links for security,
facilities personnel, fire and police.
Preventative Maintenance
Minimal maintenance is required to support installed InCell™ systems. System maintainers
should ensure that all RF, power and fiber connectors are tight and that the CDU is mounted with
adequate room to allow air to flow into the chassis. Indicator LEDs show system status while
relay and optional remote alarm interfaces allow small or large system status to be monitored.
Typically, after system installation, no removal or cleaning of the fiber connectors will be
required. Andrew does recommend using a commercially available fiber optic cleaning kit to
maintain clean fiber optic connectors that are removed.
Fault Repair
If a fault is detected in the system, maintainers can determine the problem cause by reviewing
reports from remote monitoring systems or by observing the front panel LED indicators on the
CDU chassis. Because the different CDU ports correspond to different remote antenna locations,
maintainers can determine where the problem exists in the building. Maintainers can replace
ERAUs in the building without having to power down the system. If a CDU fails, spare CDU
boards can be installed.
Technical Support
Andrew engineers and technicians familiar with the operation of the InCell™ system are
available Monday through Friday, 8am to 5pm CST. These personnel are familiar with
distributed in-building antenna systems, with fiber optic cable installation and with
troubleshooting and in-building coverage solutions. They may be reached at [phone].