Escort Passport SRX handleiding
Handleiding
Je bekijkt pagina 10 van 14
How Radar and Laser Work
16 17
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.
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.
How Safety Warning Systems Works
Safety Warning Systems, or SWS, is a
modified K-band radar signal used to
transmit important driving related
information.
From the factory, your PASSPORT is
programmed with SWS turned ON. If SWS
is not used in your area, you can simply
turn SWS reception OFF by using
PASSPORT’s EZ-Programming feature.
The SWS system has 64 possible
messages (60 allocated). The SWS messages
your PASSPORT can decode and display are
listed on the facing page.
Note: Some of the safety messages
have been condensed, so each message can
be displayed on one or two screens on
PASSPORT’s eight character display.
Since Safety radar technology is
relatively new and the number of
transmitters in operation is not yet
widespread, you will not receive Safety
signals on a daily basis and should not be
surprised to encounter emergency vehicles,
road hazards and railroad crossings that are
unequipped with these transmitters and,
therefore, fail to provide a signal. As Safety
transmitters become more prevalent (the
number of operating transmitters is
growing every day), these Safety radar
signals will become more common.
For more information and details about
SWS safety radar, visit their web site at
www.swslc.com.
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 radar, your
PASSPORT will occasionally receive non-
police radar signals. Since these X-Band
transmitters are usually contained inside of
buildings 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
PASSPORT’s radar detection abilities are
fully operational.
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
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.
Bekijk gratis de handleiding van Escort Passport SRX, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Escort |
| Model | Passport SRX |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3206 MB |
