User Manual

Users Guide - Andrew InCell™ Fiber Optic Distributed Antenna System
4-2
InCell™ Installation Parameters
Installation times will depend on the size of each installation; however, Andrew can provide
rough guidelines for installing the CDU and ERAU that may be used to determine the total
system installation time once the number of equipment parts is determined.
To minimize system wiring times, Andrew composite cable is recommended to allow the fiber
optic links and the power to be routed to each ERAU in one small, easy to pull cable. The
composite cables eliminate the need for conduit to each remote antenna location, improving
wiring installation time.
Disruption to business is minimal as the CDU is typically installed in an electronic equipment
room and the remote antennas and wiring may be installed after work hours. The composite
fiber optic cables are small and lightweight making them easy to pull through risers, above roofs
and through tubes.
Site survey testing before and after installation may be done during business hours using small,
portable RF measurement tools.
InCell CDU Installation
The CDU may be mounted in indoor areas in a standard 19” equipment rack, a 19” telecom rack
or on a wall. Mounting hardware is provided for rack mounting, and optional wall mount
brackets are available from Andrew to allow the CDU to be fixed in place on a wall when racks
are not available.
Mount the CDU in the rack so that there is open air or moving air around the CDU. Take care to
ensure that the ventilation holes on the sides of the CDU are not blocked. The CDU uses
universal AC power for maximum flexibility and comes with a 6-foot AC power cord for use in
the U.S. If possible, use of an uninterruptible power supply (UPS) to supply power the CDU is
suggested. A ground lug is provided for connecting the CDU chassis to the ground circuits of
other equipment.
Allow 30 minutes for unpacking the CDU, installing the unit into the rack or wall and connecting
the RF, fiber and power cables. Upon application of system power, front panel indicators will
give the installer a visual indication of power and link status.
To ensure trouble free connections, all fiber optic connectors on the CDU and their mating cable
connectors should be thoroughly cleaned using high purity (99%) alcohol and dry compressed
air.
Care should also be taken to ensure that the fiber optic cables are routed cleanly to the CDU and
that they are not kinked are bent with less than a 2” bend radius. Also, cables should be routed
away from sharp edges that could cause abrasion or cause dents in the cable over a period of
time.