Beltronics RX45 Specifications download pdf (Page 12)

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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.

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 Laser Works How TSR Works

Some of the markets where these

sensors are located include:

Omaha NE

Raleigh-Durham NC

San Francisco CA

San Jose CA

Santa Barbara CA

Ventura CA

Washington DC

Dayton OH

Denver CO

Everett WA

Lincoln NE

New York NY

Oakland CA

Olympia WA

Our exclusive TSR anti-falsing software

rejects these unwanted signals. Since not all

markets have this type of traffic flow

system, your detector has been pre-set with

TSR turned off.

To turn TSR on, simply visit the

Preferences section. Under “Bands”, select

TSR “on”.

How TSR Works

Several manufacturers of traffic flow

monitoring systems use K-band

transmitters to sense traffic movement.

Unfortunately these sensors are

transmitting in an “instant on” mode, which

creates a false alert. These sensors are

positioned approximately 1 mile apart and

turn on and off approximately every

minute.

These sensors are fully self-contained

and roadside-mounted.

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