(2) (a) For purposes of this section, "radar jamming device" means any active or passive device, instrument, mechanism, or equipment that is designed or intended to interfere with, disrupt, or scramble the radar or laser that is used by law enforcement agencies and peace officers to measure the speed of motor vehicles. (b) No person shall operate a motor vehicle with a radar jamming device in the motor vehicle. (1) (a) No person shall use, possess, or sell a radar jamming device. Radar jamming devices prohibited - penalty. Your state's laws will vary.Ĭolorado CRS 42-4-1415. The jammer must detect the waveform and generate a match, then synchronized transmission to the next detected pulse.For the record. Laser jammers are ineffective because the jamming signal must closely match the lidar pulse width and rate which varies with model. Laser Jammers are useless at the ranges lidar is most effective. The jammers have the same problem as laser detectors, the narrow lidar beam never strikes the detector aperture. All jammers are completely ineffective at ranges less than 500 feet. A few jammers are effective, about half the time, for vehicles at ranges greater than 500 to 1000 feet. Most laser jammers are completely ineffective.
This technique works on the same principle as a tuning fork. The signal is slightly amplitude modulated at the radar Doppler frequency rate of the fake speed. Both techniques could set off the radar interference or jamming indicators.ĭeceptive jamming transmits a signal anywhere in the radar receive band. Deceptive jamming transmits a signal that causes the radar to register a speed set by the jammer. Noise jamming transmits amplified noise to desensitize the receiver and obscure legitimate targets. There are 2 basic jamming techniques used against police radar, noise jamming and deceptive jamming. Many police radars can detect jamming signals even when the radar is not transmitting, this is a good reason a jammer should only transmit when a radar signal is present. There are 2 types of active jammers, one continuously transmits, the second only transmits when a signal detected. Before this ruling passive jammers were not considered transmitters and not covered by FCC regulations.
In 1997 the FCC ruled passive jammers violate federal regulations because the jammers radiate energy that, or at least is intended to, adversely affect the ability of law enforcement officials to protect public safety on the highways.
Passive jammers have absolutely no effect on any radar under any circumstances. Additionally the jammer antenna would need to be almost perfectly aligned to the radar antenna - not lightly. A passive jammer does not generate or amplify a signal, only channel or redirect the radar energy back toward the radar.įor this method to work the jammer antenna would need to be at least as large as the vehicle - not practical. Passive jammers are suppose to re-radiate the radar signal after distorting it, adding noise or rapidly shifting frequency, in such a way the true target reflection is masked. Anyone using a jammer risks such penalties as losing FCC licenses, paying a fine, or facing criminal prosecution. The FCC considers the use of traffic radar jammers as malicious interference and strictly prohibited by the Communications Act of 1934, as amended, as well as by FCC rules. Police radar jammers are not considered good for the public by the FCC. states and some countries prohibit the use or possession of a police radar jammer.įor the United States Federal Communications Commission to consider an intentional radiator legal the field radiation must meet FCC Rules Part 15, and the device must perform some function for the public good. The legality of jammers is also in question and somewhat up to the whims of bureaucrats and politicians regarding enforcement and court interpretation of the law. Most if not all of these jammers are useless, absolutely no effect at any range under any conditions. Acceleration Parameters Constants / Conversions Police 10 Codes Universal Time (UTC) Links Blog Previous |įrom time to time traffic radar jammers appear in magazine and internet ads.
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