User's Manual

Advanced RF Technologies, Inc.
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the signal is being fed back into the system. This creates a constant amplification of the same signal. As a result, the
noise level rises above the signal level.
To prevent feedback, the donor and server antennas must be separated by an appropriate distance to provide
sufficient isolation. Isolation is attained by separating antennas a sufficient distance so that the output of one
antenna does not reach the input of the other. This distance is dependent on the gain of the repeater.
2.4 Battery
This port should be connected to ADRF 48VDC BBU(Battery back-up unit) via dedicated cable provided by ADRF.
2.5 Grounding
A ground cable is included in the box. The grounding terminals are located at lower right-hand side of the BDA.
The grounding cable should be properly connected before powering on the equipment.
Figure 2-3 Protective Earthing Conductor
Ground terminals located on the side consisted of a 1.25mm²(16AWG) and should be permanently connected
to earth(Protective earthing conductor).