GENERAL INFORMATION
12
INTERFERENCE
Interference from any external event can influence the
operation of the radar. These influences can be natural or
man-made. A knowledgeable operator will not be
confused by these external influences.
Natural events such as driving rain or blowing dust can
cause a scattering effect, or diffusion, which can decrease
the effective range of the radar. Terrain can also affect
the radar's range. If the device be on a slight decline, the
antenna could be shooting short of the target. If on a
slight incline, it could be shooting over the target. Range
will be decreased in either case.
Man-made influences are by far the most troublesome,
because they generally involve electronic signals, which
may cause spurious displays. Power transformers, radio
transmitters, fans, etc generate electronic noise signals.
If the power supply voltage to the DRU III unit drops
below the level required for proper operation, power to the
microwave transmitter will be turned off. This prevents
false readings from occurring during periods of low
voltage.
Summary of Contents for DRU III
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