User Manual

MN021-01
Page 20 of 28
SYSTEM INSTALLATION
14. Installation and cabling
BriteCell™ FAST is designed to be simple and easy to install and commission. It requires a
minimum number of tools and equipment. However, it is necessary to observe local regulations
when planning and implementing an RF system and safety conventions must be strictly adhered
to at all times. Particular attention should be paid to the presence of optical lasers, which can
represent the only potential hazard related to the use of BriteCell equipment. A working
knowledge of optics, and the safety procedures in their use, is required by the installation,
commissioning and maintenance staff.
14.1. Local unit location
TFLF local units should be placed as near as possible to the BTS or the RF repeater and should
be easily accessible as they provide visual alarm information for the system maintenance.
ü The position of the remote unit should be vertical to maximize thermal dissipation.
ü There should be easy access to the optical and RF cables.
14.2. Remote unit and antennas location
The most efficient locations for the TFAF remote transceivers will minimise the number of
antennas required, while maintaining the coverage level goal.
ü The position of the remote unit should be vertical to maximize thermal dissipation.
ü There should be easy access to the optical and RF cables.
The passive antenna’s placing should be chosen provide the maximum indoor radio coverage,
and should be mounted at a minimum height of 2.5m from the ground. They should not be
placed near trees, plants, metal grids or other obstacles, which could disturb their functionality
and lead to a degradation of the device's performance.
14.3. Power Supply
A BriteCell™ Fast system has been designed for remote power distribution, but is also possible
to supply each unit separately at –48VDC. A power supply may be distributed in a composite
cable, copper and fibre, or two separate parallel cables may be run. A suitable external adapter
to provide at least 100W at –48VDC must be used.
15. System start-up
To avoid damaging the equipment, the following criteria must be used to start up the system:
1. Verify all the power supply connections.
2. Verify all the RF connections and power levels at the BTS/Repeater interface.
3. Verify all the optical connections.
4. Switch on the system.
5. Check for alarm status and in case of alarm refer to troubleshooting paragraph.
16. Maintenance
It is a good rule, when working with the fibre optic components, to always dispose of the
appropriate screw covers for closure of the optic connectors that are not connected. The
intrinsic delicateness of an optic connection must be highlighted. A minimum layer of dust
causes a notable increase of the insertion loss, therefore:
ü Always close the optic connectors that are not connected with the appropriate screw covers.
ü Always use compressed gas to remove any deposits in the receptacles before closing them.
ü Use the appropriate cloths to clean the connectors.
ü Do not allow the male connector to come into contact with skin or oily surfaces.
ü Should it be necessary to clean the optic connector, only use pure alcohol.