User's Manual
044-05326 Rev B vii
Preface
Warning, Cautions, and Notes
Warnings, Cautions, and Notes are found throughout this manual where applicable. The associated icons in
warnings and cautions are used to quickly identify a potential condition that could result in the consequences
described below if precautions are not taken. Notes clarify and provide additional information to assist the
user.
WARNING: The warning symbol means danger. You are in a situation that could cause bodily
injury or death. Before you work on any equipment, be aware of the hazards involved with elec-
trical and RF circuitry and be familiar with standard practices for preventing accidents.
CAUTION: The caution symbol means the potential exists for equipment damage or loss of
data.
NOTE: Notes contain helpful suggestions or references to material not covered in the document.
Safety
Any personnel involved in installation, operation, or service of units included in a Powerwave repeater
system must understand and follow the points below:
❑ Powerwave Nexus FT Rack Mount Radios (RMR) are designed to receive and amplify signals from
one or more base stations and retransmit the signals to one or more mobile stations. They also act
the other way round, that is to receive signals from one or more mobile stations, then amplify and
retransmit the signals to the base stations. Powerwave Nexus FT RMR systems must be used
exclusively for this purpose and nothing else.
❑ Units supplied from the mains must be connected to grounded outlets and in conformity with the local
prescriptions.
❑ Power supply units supplied from the mains contain dangerous voltage that can cause electric shock.
Disconnect the mains prior to any work in such a unit. Local regulations are to be followed when
servicing such units. Only authorized service personnel are allowed to service units while the mains
are connected.
❑ All RF transmitting units, including Nexus FT RMRs, will generate radio signals and thereby give rise
to electromagnetic fields that may be hazardous to the health of any person who is extensively
exposed close to an antenna.
Human Exposure to RF Radiation
Safe distances must be kept when working around antennas. The following paragraphs describe the
cautions to be aware of during the installation and maintenance of antenna systems and how to calculate
safety distances needed for RF radiation at different antenna power and frequencies.
Repeater Antennas
To be able to receive and transmit signals, a repeater is connected to a donor antenna directed towards the
base station and a service antenna directed towards the coverage area. A fiber optic cable from the base
station might, however, be substituted for the donor antenna.
Installation and Maintenance of Antenna Systems
Installation and maintenance of all antenna systems must be performed with respect to the radiation
exposure limits for public areas. The antenna radiation level is affected by the output power, antenna gain,
and transmission devices such as cables, connectors, splitters and feeders. Also have in mind the system
minimum coupling loss, typically between 25 dB and 35 dB, is determined by a standard with the purpose
to protect base stations from noise and other performance dropping effects.
DRAFT