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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.
.
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 con-
figuration 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.
Instant-On/Pulsed Radar
This type of signal appears suddenly when a Radar unit is
“triggered”. The instant-on alert consists of an intense, three
second X, K or Super Wide band Ka audio “burst”, coupled
with the illumination of the digit “
9
” and the corresponding
band indicator.
Typical False Alert (Radar)
Ideally, a Radar detector should only alert in the presence of
police Radar. However, because other devices share X band
with police Radar, false alerts sometimes occur. Generally, a
false signal produces only a short audio and visual alert. Since
they are most often weak, it is possible to drive out of the
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