Beltronics Radar Detector Sti Magnum User Manual

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Technical Details
20
How Radar Works
Traffic radar, which consists of microwaves,
travels in straight lines and is easily
reflected by objects such as cars, trucks,
even guardrails and overpasses. Radar
works by directing its microwave beam
down the road. As your vehicle travels into
range, the microwave beam bounces off
your car, and the radar antenna looks for
the reflections. Using the Doppler Principle,
the radar equipment then calculates your
speed by comparing the frequency of
the reflection of your car to the original
frequency of the beam sent out.
Traffic radar has limitations, the most
significant of these being that it typically
can monitor only one target at a time. If
there is more than one vehicle within
range, it is up to the radar operator to
decide which target is producing the
strongest reflection. Since the strength of
the reflection is affected by both the size
of the vehicle and its proximity to the
antenna, it is difficult for the radar operator
to determine if the signal is from a sports
car nearby or a semi-truck several hundred
feet away.
Radar range also depends on the
power of the radar equipment itself.
The strength of the radar unit’s beam
diminishes with distance. The farther the
radar has to travel, the less energy it has for
speed detection.
Because intrusion alarms and motion
sensors often operate on the same
frequency as X-Band or K-band radar, your
STi MAGNUM will occasionally receive
non-police radar signals. Since these
transmitters are usually contained inside
of a building, or aimed toward the ground,
they will generally produce much weaker
readings than will a true radar encounter.
As you become familiar with the sources of
these pseudo alarms in your daily driving,
they will serve as confirmation that your
STi MAGNUM’s radar detection abilities are
fully operational.
How “POP” Works
“POP” mode is a relatively new feature for
radar gun manufacturers. It works by
transmitting an extremely short burst,
within the allocated band, to identify
speeding vehicles in traffic. Once the target
is identified, or “POPPED,” the gun is then
turned to its normal operating mode to
provide a vehicle tracking history, (required
by law).
21
pulses to measure the distance to a vehicle.
Speed is then calculated by measuring how
quickly these pulses are reflected given the
known speed of light.
LIDAR (or laser) is a newer technology
and is not as widespread as conventional
radar, therefore, you may not encounter
laser on a daily basis. And unlike radar
detection, laser detection is not prone
to false alarms. Because LIDAR transmits
a much narrower beam than does radar,
it is much more accurate in its ability to
distinguish between targets and is also
more difficult to detect. AS A RESULT,
EVEN THE BRIEFEST LASER ALERT
SHOULD BE TAKEN SERIOUSLY.
There are limitations to LIDAR
equipment. LIDAR is much more sensitive
to weather conditions than RADAR, and a
LIDAR gun’s range will be decreased by
anything affecting visibility such as rain,
fog, or smoke. A LIDAR gun cannot operate
through glass and it must be stationary in
order to get an accurate reading. Because
LIDAR must have a clear line of sight and
is subject to cosine error (an inaccuracy,
which increases as the angle between the
gun and the vehicle, increases) police
typically use LIDAR equipment parallel to
the road or from an overpass. LIDAR can be
used day or night.
Traffic Signal Rejection Software
Your radar detector includes a new
optional boost in anti-falsing software to
eliminate excessive alerts from erroneous X
and K-band sources. One example of this is
traffic flow monitoring systems. These
systems, which are becoming more widely
used in several states, generate K-band
signals to measure the flow of traffic on
interstate highways. Unfortunately most
detectors alert to these sources as
a real threat. Our new proprietary
software (TSR), intelligently sorts,
ranks and rejects this type of false alarm
automatically. The result is ultimate
protection without excessive false alarms.
The TSR software is turned on by
default in the Programming section of your
detector. If you believe this type of system
isn’t used in your area, you can simply turn
it off. Otherwise, your detector is ready to
start protecting you right out of the box.
If you have any questions about this
new feature, please give us a call or visit our
website for more details.
How Laser (Lidar) Works
Laser speed detection is actually LIDAR
(Light Detection and Ranging). LIDAR
guns project a beam of invisible infrared
light. The signal is a series of very short
infrared light energy pulses, which move,
in a straight line, reflecting off your car and
returning to the gun. LIDAR uses these light

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