User's Manual

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16
The receiver electronic (Fig. 4.3) digitises the received signals
from the antenna to a 16-bit numerical integer value (0-32768
and +32767). These numerical values represent the
amplitudes of the received radar signals. This digital collected
data is transmitted to the CUII via the fibre optic cable labeled
D). A second fibre optic cable labeled R is used to receive the
trigger signals from the Radar Control Unit. There are also a
connector for a battery pack, a power switch and two LEDs.
4.2 Antenna elements
Each unshielded antenna frequency consists of a pair of
transmitter and receiver antenna elements. These elements
are connected to their respective unshielded electronic units
via a D-sub connector. The connectors are different genders
for the transmitter and receiver antenna elements to eliminate
the possibility of incorrect connections.
A rubber O-ring is fitted to the connecting metal plate for water
resistance and should be inspected periodically. The antenna
elements must be fitted to the electronics by properly locking
the metal clips.