Wikipedia wrote: A radar detector detector (RDD) is a device used in areas where radar detectors are declared illegal.
Radar detectors are built around a superheterodyne receiver, which has a local oscillator that radiates slightly. It is therefore possible to build a radar-detector detector, which detects such emissions (usually the frequency of the radar type being detected, plus about 10 MHz for the intermediate frequency). Some radar guns are equipped with such a device.
[edit] HistoryVG-2 Interceptor was lastly the first device developed for this purpose, although more current technology such as the Spectre III (Stalcar in Australia) is now available.[1] This form of "electronic warfare" cuts both ways and since detector-detectors use a similar superheterodyne receiver, many early "stealth" radar detectors were equipped with a radar-detector-detector-detector circuit, which shuts down the main radar receiver when the detector-detector's signal is sensed, thus preventing detection by such equipment. This technique borrows from ELINT surveillance countermeasures. In the early 1990s, BEL-Tronics, Inc. of Ontario, Canada (where radar detector use is prohibited) found that the local oscillator frequency of the detector could be altered to be out of the range of the VG-2 Interceptor. This resulted in a wave of detector manufacturers changing their local-oscillator frequency. Today, practically every radar detector on the market is immune to the VG-2 Interceptor[citation needed].
The Spectre III detected almost every radar detector certified for operation in the United States by the Federal Communications Commission as of December 2004. However counter technology has evolved rapidly, so that by July 2008, even budget radar detectors were able to avoid detection by the device.[2] Then, in late 2008, the SpectreIV was released, citing improved range and reliability over the Spectre III.
Garrett
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Radar detectors are so much fun .. First, they do not work nearly as well as advertised,, Many patrol cars do not use radar, Many use LADAR and when they "Shoot" your car,, All your detector can say is "You been had son". and there is another system VASCAR that has absolutly ZERO emissions and thus can not be detected by any detector no matter what they claim, And I've had people INSIST their detectors can detect it. (NOTE: I understand this ssystem well enough to describe it, Will in a bit)
What' smore.. The Federal rules say it is illegal to use any information you hear on police frequencies for profit... SO, if you lift your foot to lower your liability. You just broke federal law.. I do not know of that law ever being used in this manner, But I do knwo the law.
VASCAR.
Imagine taking a tape measure and measuring out say a fifty of a mile.
Now have a patrol car drive that streatch and time him with a stop watch.
Now time your suspects, anyone taking less time than the patrol. IS ILLEGAL, and by using a calculator you can easily calculate his speed.
California has been doing exactly this for many years.
VASCAR combines the tape measure, stop watch and calculator into one box.
Nothin adds excitment like something that is none of your business
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navegator wrote: In California the Higway Patrol and some local law enforcement agencies have radar detectors on the vehicles that work to the back as well as to the front of the patrol car, it all depends on what the officer wants to do.
If you are following or being followed by a patrol vehicle and the detector goes off, there is a pretty good chance that the radar detector is active in that veheicle.
Navegator
The last I remember, California Highway Patrol do not need RADAR detectors to cite you for speeding. They are certified by sight. As part of my RADAR training in California with Air Force, in order to pass the class, we had to esitmate the speed of a vehicle within about 5mph of its actual speed. I want to say that CHP was within a 2 couple MPH.
Police have ways of getting around RADAR detectors. We did all the time. It's just a matter of about 1-2 seconds.
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I can't pass this up as a soon to be retired LEO. I do not allow my radar unit to emit a beam constantly. I can activate the hold on the unit, so it does not emit anything, and release it when a vehicle comes along. That way a radar detector will not go off until it's too late. I can lock in your speed before you have time to react to the radar detector. I have a front and a rear antenna so I can track violators both in front of and behind me. I also use a laser unit and they are aimed at the front license plate area and emit a much smaller beam. If I stop someone for speeding and they have a radar detector they will get a ticket.
dodge guy wrote: A radar detector will alert you to speed traps!
There is no such thing as a "speed trap".
Really?! then what do you call a road where the speed drops from 55-45 for less than a mile then back up to 55? I`ve seen this countless times. this is in an area with nothing more than a few farm houses and such. yet, in the same area where it is 55 there are farm houses well before and well after the "speed trap". I`m not talking driving through a town, those are ususally 30-35mph.
It has nothing to do with Law Enforcement. I would assume that whoever is in that area has lobbied to have the speed reduced. Or there was a reason to reduce the speed in that section for a reason.
I dont own one and I couldnt now as a holder of a CDL but in my town our squads have front and back radar units but the thier favorite thing to do is use the handheld Radar units they still have. And the excuses they have told me are pretty funny. (I know alot of the town officer's)
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bluie5 wrote: I can't pass this up as a soon to be retired LEO. I do not allow my radar unit to emit a beam constantly. I can activate the hold on the unit, so it does not emit anything, and release it when a vehicle comes along. That way a radar detector will not go off until it's too late. I can lock in your speed before you have time to react to the radar detector. I have a front and a rear antenna so I can track violators both in front of and behind me. I also use a laser unit and they are aimed at the front license plate area and emit a much smaller beam. If I stop someone for speeding and they have a radar detector they will get a ticket.
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