Safe-Com Wireless Public Safety Fiber Distributed Antenna System
6-20-18 page 19
Linear Topology
Setting up the Remote Unit
The Remote Unit accepts bidirectional optical signals via single mode fibers from the Head-End
Unit.
It converts the optical signals to RF – radio frequency.
The RF port is connected to a distributed antenna system consisting of antennas, splitters and taps.
The Remote Unit monitors the incoming signal and assures proper levels so as to guarantee the
radiated emissions downlink do not exceed FCC limits.
The uplink path provides a fixed gain back-haul to the Head-end. The system monitors the
incoming RF signal (from the antenna) and attenuates when excessive signal is detected at the
uplink input port. This is to prevent damage to the internal circuitry. Excessive RF input (above -
10dBm) can damage the unit so care should be take not to key up radios or cellphone near the unit,
especially during installation process. Radios including cellphones should not be used in close
proximity to the units.
