Antenna configurations – Clear-Com Tempest900 User Manual
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Tempest®900 2-Channel Wireless Intercom System
Antenna Configurations
When attaching the supplied ½ Wave Omni-directional Whip antenna directly to the back of the BaseStation, always ensure
that the antenna is firmly seated, is not cross threaded, and is located away from any metal obstructions. Keep the antenna
away from walls or other significant structures by at least 24 inches.
To remotely locate antenna, always use high quality, low loss, 50 ohm RF cable terminated with an RP-TNC connector for
the BaseStation side connection and the appropriate antenna mating connector on the other end. LMR-195 (or equivalent)
coaxial cables can satisfactorily be used in lengths up to 10 feet. LMR-400 coaxial cables (or equivalent) can be used at
lengths up to 25 feet. Longer RF coaxial cable runs are not recommended due to signal attenuation in the cable.
When locating the antenna at distances greater than 25 feet, use the optional Tempest Remote Transceiver. The remote
transceiver allows locating antennas up to 1,500 feet away from the BaseStation without the RF signal loss that is associated
with using RF cable. The antenna can be mounted directly to the Tempest Remote Transceiver, or they can be separated
from the remote transceiver using high quality, low loss, 50 ohm RF cable as listed above.
See the Tempest Remote Transceiver
section of this manual for more information on the setup and use of the remote transceiver.
Option 1
Install the BaseStation in the center of the area
of communication, with antenna installed on
the back of the BaseStation, having a clear
line of sight in all directions.
Option 2
Install the BaseStation in an equipment
rack (1 RU) and use an optional LMR-
195, a 50 ohm coax up to 10 ft to mount
the antenna above the equipment rack.
(5 ft of LMR-195 coax induces about 1
dB of attenuation.)
Option 3
Install the BaseStation in a convenient location and use the Tempest
Remote Transciever connected with CAT 5 cable and RJ-45 connectors to
position antenna
s
in the most suitable location.