Originally Posted by
yan_750i
you mean, there is a radar which already does it? which one? or are you talking about a scanner like uniden trunktracker, etc. i cant drive with a scanner tuned in to CHP waves - i'd go crazy from not having music in the car.
The Uniden BCT-7, BCT-8, BCT-10, BCT-12 and the Radioshack Pro-2051 all have what is called a "Highway Patrol Alert" feature that detects the mobile extenders used in some state police vehicles. They will also alert to simplex frequencies such as tac, aircraft to car, car to car, etc. The BCT-10 and BCT-12 are radar detector sized, and they haven't been made since the late 90's. The BCT-8 and Pro-2051 are current models, but unfortunately they are the size of a regular base scanner. Theese scanners are pre-programmed with frequencies for the Highway Patrol Alert, so although the older BCT-10 and BCT-12 might still work in some states, others have changes radio systems since they were made making them obsolete in those states.
In fact, I believe the idea behind these might have actually started out in California. There used to be a unit sold called a "CHiPS Detector" that worked like the scanners mentioned do.
The nice thing about these is that you don't have to listen to any transmissions at all, they'll just beep when any activity is detected meaning that there might be a cop within about 3 miles or so. These work VERY well in some states, in fact people who have never tried them would really be amazed at just how well they work. But in other states, they don't work well at all.
If you know what you are doing, you can do essentially the same thing with other scanners if you program in the frequencies and configure them yourself. But it can be a LOT of work, and unless you are already a scanner enthusiast or want to become one, the scanners with the "Highway Patrol Alert" might be a better option.
You'll find a lot more info on this in the "Other Countermeasures" section.
Jim
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