Beltronics Vector VL 970 Owner's Manual - Page 17

Stationary Radar concealed by the crest of a hill aimed in your, direction., Moving Radar behind

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3. Stationary Radar concealed by the crest of a hill aimed in your direction. Radar signals travel in a straight line and do not pass through earth. Consequently, police Radar aimed at the crest of a steep hill cannot be received until you are at or near the top. Warning time may be minimal (as in situation #2) since a strong signal is not present until you are near the crest of the hill. At this point, you may be nearly in the police officer's line of sight. When cresting a hill, a weak initial alert followed very quickly by a full alert is typical. This alert pattern requires prompt attention. 4. Moving Radar behind you, traveling in the same direction. Police Radar signals transmitted from behind your vehicle can be received when reflected by objects in front of you such as large signs, bridges and trucks.As you drive, the size and configuration of these objects are constantly changing causing the strength of any reflected Radar signal received to vary.A strong, uninterrupted alert indicates the patrol car is close behind. 

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3.
Stationary Radar concealed by the crest of a hill aimed in your
direction.
Radar signals travel in a straight line and do not pass through
earth. Consequently, police Radar aimed at the crest of a steep
hill cannot be received until you are at or near the top.
Warning time may be minimal (as in situation #
2
) since a
strong signal is not present until you are near the crest of the
hill.At this point, you may be nearly in the police officer’s line
of sight.When cresting a hill, a weak initial alert followed very
quickly by a full alert is typical. This alert pattern requires
prompt attention.
4
.
Moving Radar behind you, traveling in the same direction.
Police Radar signals transmitted from behind your vehicle
can be received when reflected by objects in front of you
such as large signs, bridges and trucks. As you drive, the size
and configuration of these objects are constantly changing
causing the strength of any reflected Radar signal received to
vary.A strong, uninterrupted alert indicates the patrol car is
close behind.
