RANGEFUL Spear 300 PRO Manual De Instalación página 14

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Coaxial cable (50 Ohm) and connectors (N-type or SMA
according to the antennas used) for connecting antennas to the
repeater.
In addition, splitters, couplers, antenna amplifiers and boosters
may be needed to create a mobile signal amplification
system. All this equipment you can find on our website
www.rangeful.com
4.2. Outdoor antenna installation
It is recommended to install the outdoor antenna free from
visible obstacles to signal transmission. The optimal antenna
performance can be achieved by attaching it to a mast or
bracket and pointing it towards the operator base station.
The repeater is a highly sensitive bi-directional amplifier of
a mobile signal, therefore it is necessary that the outdoor
and indoor antennas are well isolated from each other to
avoid self-oscillation of the repeater. The minimum distance
between the outdoor and indoor antenna is 10m. If isolation
can't be achieved due to limited distance, the roof of the
building, concrete or brick walls or any other barriers can be
used between antennas to increase isolation. There is also
highly recommend 3-4m vertical distance between antennas.
To understand the self-oscillation process you can take
a microphone and a loudspeaker and bring them close to each
other. You will hear a very loud noise.
The signal strength from the outdoor antenna directly affects
the efficiency of the indoor coverage. That's why it is very
important to choose the good outdoor antenna location in order
to get the best signal.
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