7
/
11
As shown in the below illustration, the booster the downlink signal
r
from the tower
and send to the indoor antenna hereafter. If the distance between outdoor antenna
and indoor antenna is less than the required distance, the amplified signal
R
will go
back from indoor antenna to outdoor antenna. So it will lead to self-oscillation and
reduce the coverage area, also the bad calling quality could happen at the same time,
and the worse is that the mobile network could be influenced badly and the operators
will finally come to shut off the booster system.
If isolation can’t be achieved by the limited distance, the roof of the building or any
other barriers can be used in between to increase isolation.
Fix the donor antenna after selecting the best position, and adjust slightly its height
or angles in order to get the signals with suitable input power level and calling
quality.
（
2
）
Installation of Indoor Antenna
Note
：
indoor antenna must be operated at a fixed location inside a building
Proper antennas shall be selected according to the site conditions and the
requirement.
Omni antenna (Indoor ceiling omni antenna or whip antenna), is suitable to be
installed in the center and radiate all directions.
Indoor antenna must be operated at a fixed location inside a building, it is better to
use a directional panel antenna when the coverage building is long and narrow.
Connect
the indoor antenna to the booster connector marked
INDOOR
with 20 FEET
