2.3.2.4
Console Supervision
The supervisory system shall provide constant supervision of the operating
conditions of the console. Indicators shall be provided for each major
component, and an audible signal shall be produced in the event of failure
of any major component. A switch shall be provided to silence the audible
trouble signal.
2.3.2.5
Receiver Supervision
The supervisory system shall provide constant supervision and display of
the operating condition of the radio receivers, and shall indicate an
abnormal condition when a radio fire alarm transmitter carrier lasting more
than 15 seconds is detected. The receiver's ability to properly receive
and decode an incoming signal shall be tested at least once every [_____]
minutes.
2.3.2.6
Manual Battery Test
Console shall have a switch to manually place the console on emergency
battery power for test purposes.
2.3.2.7
Console shall be designed with modular components to allow interchange of
components for maintenance purposes. Primary power cables shall
incorporate positive twist-lock connections. Interconnecting cables and
connectors shall be compatible with computer quality signal data
transmission.
2.3.3
Antenna System
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NOTE: The antenna for the dual transmitter and
receivers shall be installed with a maximum vertical
separation. The designer must check local
conditions for design wind gust and ice loading.
The lowest design wind speed is 160.9 km per hour
(100 mph); typical design wind speed is 201.2 km per
hour (125 MPR).
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The antenna system shall utilize vertical polarization antennas,
communication links between transmitters/receivers and antennas, and
matching networks as needed for the proper coverage. The antenna system
shall be either omni-directional or shaped-coveraged as selected by the
Contractor based on the topography. The antenna system and cabling shall
be furnished to provide adequate system gain. The antennas shall be
capable of withstanding the environmental conditions of [200] [_____]
km/hour [125] [_____] mph wind and [13 mm 1/2 inch radial] [_____] ice
without failure. Lightning protection shall comply with NFPA 780. Antenna
supporting structures shall comply with EIA ANSI/TIA/EIA-222-F.
2.3.3.1
Grounding Conductors
Antenna grounding conductors shall be minimum 32-strand, No. 17 AWG copper.
SECTION 13852A
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