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Radar detectors are generally used by noncommercial motorists to detect whether the speed of their vehicle is being monitored by a law enforcement officer. Most detectors are capable of detecting radar equipment on any wavelength. It is not illegal to equip a noncommercial vehicle with a detector in the United States except in... more »
A radar detector is a device which uses different frequencies to detect the lasers projected by radars. The devices are most commonly found in a small format that can be placed inside the cab of a car. Most people use radar detectors to identify radar guns used by law enforcement. Radar detectors come in a variety of styles, however,... more »
First the good news. If you drive an SUV, pickup truck or any other type vehicle on which fog lights are preinstalled or you've added them on yourself, there is no federal law prohibiting their placement on the vehicle. Second, there isn't any bad news. It's more no news at all, really. That's because there is no record in the United... more »
You're speeding down the highway, going a few miles above the posted limited, when suddenly you hear a siren and see red and blue lights flashing in your rearview mirror. You've just been busted for speeding. To prevent this scenario, many people turn to radar detectors. These little devices provide an early warning when radar traps... more »
A radar gun uses radar waves to calculate how fast you are speeding. These waves can be detected quite easily by a simple machine that reads these waves. Since radar waves produce electromagnetic energy and radio waves, the radar detector only needs to pick up these waves to work. That means they can use a typical radio receiver such... more »
For the past 40 years or so there has been an escalating electronics war between the police on one side and motorists on the other who prefer to... more »
If you do a lot of driving, consider purchasing a radar detector to help reduce your chances of receiving a speeding ticket. A radar detector... more »
A radar detector is a device that senses the presence of police radar that is used to track how fast cars are going. While radar detectors are not... more »
A radar detector is a passive electronic device used by motorists to determine if their speed is being monitored by law enforcement agencies via a radar unit, thereby potentially avoiding prosecution for speeding. Only doppler radar-based devices can be detected — other speed measuring devices including those using ANPR, piezo sensors and VASCAR technology cannot be detected, while LIDAR devices require a different type of sensor. Most of todays radar detectors detect signals across a variety of wavelength bands — usually X, K and Ka (as well as Ku, in Europe.)
Description
One of the technologies that law enforcement agencies can use to measure the speed of a moving vehicle uses doppler radar to beam a radio wave at the vehicle, and then infer the vehicles speed by measuring the Doppler effect-moderated change in the reflected waves frequency. Radar guns can be hand-held, vehicle mounted or mounted on a fixed object, such as a traffic signal.
Radar detectors use a superheterodyne receiver to detect these electromagnetic emissions from the radar gun, and raise an alarm to notify the motorist when a transmission is detected. False alarms can occur however due to the large number of devices, such as automatic door openers, that operate in the same part of the electromagnetic spectrum as radar guns.
In recent years some radar detectors have added GPS technology. This allows users to manually store the locations where police frequently monitor traffic, with the detector sounding an alarm when approaching that location in the future (this is accomplished by pushing a button and doesnt require coordinates to be entered). These detectors also allow users to manually store the coordinates of sites of frequent false alarms, which the GPS enabled detector will then ignore. Some GPS enabled detectors can download the GPS coordinates of speed monitoring cameras and redlight cameras from the internet, which are contained in the Trinity database. A tr read more at » http://en.wikipedia.org/wiki/Radar+detector
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