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Alert
Passport alerts slowly for awhile and then
abruptly jumps to a strong alert.
Passport alerts intermittently. Rate and
strength of alerts may be consistent or vary
wildly.
Passport alerts intermittently. Rate and
strength of signal increases with each alert.
Passport gives an X-band, or K-band alert
intermittently.
Explanation
You are approaching a radar unit concealed by
a hill or an obstructed curve.
A patrol car is travelling in front of you with a
radar source aimed forward. Because signals
are sometimes reflected off of large objects and
sometimes not, the alerts may seem inconsistent.
A patrol car is approaching from the other
direction, sampling traffic with instant-on
radar. Such alerts should be taken seriously.
You are driving through an area populated
with radar motion sensors (door openers,
burglar alarms, etc.). Since these transmitters
are usually contained inside buildings or aimed
toward OR away from you, they are typically
not as strong or lasting as a real radar encounter.
CAUTION: Since the characteristics of these
alerts may be similar to some of the preceding
examples, overconfidence in an unfamiliar
area can be dangerous. Likewise, if an alert in
a commonly traveled area is suddenly stronger
or on a different band than usual, speed radar
may be set up nearby.
17
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