19
Understanding Your Detector
Interpreting Alerts
Although PASSPORT Max has a comprehensive warning system, only experience will teach you what to
expect from your detector and how to interpret what it tells you. The specific type of radar being used,
the type of transmission (continuous or instant-on) and the location of the radar source affect the alerts
you receive.
The following examples will give you an introduction to understanding your detector’s warning system
for radar and laser alerts.
Alert
Explanation
Detector begins to sound slowly; rate of alert
increases until it becomes a solid tone. The
signal meter ramps accordingly.
You are approaching a continuous radar source
aimed in your direction.
Detector emits short alerts for a few seconds
then falls silent, only to briefly alert and fall
silent again.
An instant-on radar source is being used ahead
of you and out of your view.
Detector suddenly sounds a continuous tone
for the appropriate band received.
An instant-on radar or laser source is being used
nearby. This kind of alert requires immediate
attention.
Detector sends a brief laser alert.
Laser is being used in the area. Because laser is
inherently difficult to detect, any laser alert may
indicate a source very close by.
Detector receives weak signals. Signals may be
a little stronger as you pass large, roadside
objects. Signals increase in frequency.
A moving patrol car with continuous radar is
overtaking you from behind. Because these
signals are reflected (reflections are increased by
large objects), they may or may not eventually
melt into a solid point, even when the patrol car
is directly behind you.
Detector alerts slowly for a while then abruptly
jumps to a strong alert.
You are approaching a radar unit concealed by a
hill or an obstructed curve.
Detector alerts intermittently. Rate and
strength of alerts may be consistent or vary
wildly.
A patrol car is traveling 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.
Detector alerts intermittently; rate and
strength of signal increases with each alert.
A patrol car is approaching from the other
direction, sampling traffic with instant-on radar.
Such alerts should be taken seriously.
Detector gives an X band alert intermittently.
You are driving through an area populated with
radar motion sensors (e.g., door openers or
burglar alarms). 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.
