User Manual

Andrew InCell™ Fiber Optic Distributed Antenna System Users Guide
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InCell™ Operation, Maintenance and Support
Operation
InCell™ system operation is continuous. Andrew recommends using an uninterruptible power
supply (UPS) to provide power to the CDU. If the system uses composite cable to provide
power to the remote antenna units located throughout the building, the UPS can keep the CDU
and all RAUs powered and operational during brownouts and power outages.
Unlike some hybrid fiber distributed antenna systems that use frequency translation in the
wireless distribution process, the InCell™ uses no frequency synthesizers or synchronizing
circuitry that may be affected by power failures. The InCell™ operates immediately after power
is applied and is not susceptible to power failures.
Regular 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.
Andrew does recommend using a commercially available fiber optic cleaning kit to maintain
clean fiber optic connections. Typically, after system installation, no removal or cleaning of the
fiber connectors will be required.
Fault Repair
If a fault is detected in the system, maintainers can determine the problem cause problem 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 RAUs in the building without having to power down the system. If a
CDU fails, spare CDU boards can be installed.
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.
In special cases, Andrew has provided local support of indoor wireless distributed antenna
systems. Please contact Andrew DCS if this type of maintenance support is required.
Spare Policy
For the Slim Line CDU assembly, we recommend sparing at the board level. This unit is
comprised of 2 unique board types and a power supply module. There is a single printed circuit
board that provides the necessary RF power, DC and alarm distribution and 6 identical printed