26 Tempest®900 4-Channel Wireless Intercom System
Antenna Conguraons
When aaching the supplied ½ Wave Omnidireconal Whip antenna directly to the back of the BaseStaon, always ensure
that the antenna is rmly seated, is not cross threaded, and is located away from any metal obstrucons. Keep the antenna
away from walls or other signicant 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 BaseStaon side connecon and the appropriate antenna mang connector on the other end. LMR-195 (or equivalent)
coaxial cables can sasfactorily 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 aenuaon in the cable.
When locang the antenna at distances greater than 25 feet, use the oponal Tempest Remote Transceiver. The remote
transceiver allows locang antennas up to 1,500 feet away from the BaseStaon 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
secon of this manual for more informaon on the setup and use of the remote transceiver.
Opon 1
Install the BaseStaon in the center of the area
of communicaon, with antenna installed on
the back of the BaseStaon, having a clear
line of sight in all direcons.
Opon 2
Install the BaseStaon in an equipment
rack (1 RU) and use an oponal LMR-
195, a 50 ohm coax up to 10 to mount
the antenna above the equipment rack.
(5 of LMR-195 coax induces about 1
dB of aenuaon.)
Opon 3
Install the BaseStaon in a convenient locaon and use the Tempest
Remote Transciever connected with CAT 5 cable and RJ-45 connectors to
posion antenna
s in the most suitable locaon.
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