User Manual

USER MANUAL
11-11
4.2 Mounting
The OEM-900 operates at 902 - 928 MHz. Radio signals at these frequencies do not bend around objects but they
do bounce and reflect off objects. However, each reflection robs the signal of some of its energy. To maximize the
received power, the transmitter antenna should be mounted within line of sight of the receiver antenna.
Warning
For safety reasons, it is important that the antenna mast be grounded to
earth. It is also a good idea to use a coaxial cable lightning suppressor
between the antenna and the OEM-900
4.3 Connection
The omni antenna attaches directly to a 6 foot (2 meter) length of RG-174 cable with an MCX male connector at the
end. This fits into the MCX female connector on the end of the Transceiver.
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0
15
30
45
60
75
90
2 4 6 8 10 12 14 16
Distance between antenna (miles)
Antenna height (feet)
Figure 4.1-1 (Antenna height calculation)