Operation Manual

Installation guidelines
44
Cable Routing/Antenna Selection
Ensure all cables, e.g. power cable, fiber-optic cable, Antenna cables are routed and secured in accordance with
local/national requirements while avoiding damage to the cables.
Antennas and coax cables are selected as part of the DAS system design and may vary with location, frequency, and
power level requirements.
Use only authorized and approved antennas, cables and/or coupling devices. The use of unappr
oved antennas,
cables or coupling devices could cause damage and may be of violation of FCC regulations.
Each individual antenna used with the DAS must be installed to pro
vide the separation distance as specified in the
RF exposure requirements (refer to specific Remote Unit RF Exposure limits in the system description section).
CAUTION
Unauthorized antennas, cables, and/or coupling devices may cause non-conformity with national or international
regulations, could cause damage, or non-conforming ERP/EIRP.
Antenna Installation
The Bird Fiber DAS systems do not include remote or head end antenna. The remote end antenna must be selected
during system design, the antenna manufacturer’s data will be required when calculating link budgets.
Antenna installation instructions are provided by the antenna manufacturer.
External donor antennas that are most commonly used in combination with DDR or DDH Remote Unit family for
outdoor environment are 17 dBi gain antennas.
Safety and Care for Fibers
WARNING
Avoid looking into connected fibers and receptacles.
The laser used in this system is a Class 3b laser that produces invisible infra-red coherent light. Not safe to view
with optical instruments. Always put the protection caps on unused fibers and receptacles.
Every time a fiber is disconnected and re-connected care should be taken to avoid getting dust on the connector or
in the receptacle. Clean with a dry fiber cleaning tool before reconnecting the fiber at all times. A single speck of
dust can severely impact the transmission. Do not touch the fiber ends with your fingers. That will leave grease on
the connectors and may cause severe problems.