Car radar detectors have long been included in the arsenal of tools for early warning of the presence of mobile and stationary posts of traffic police, including members from the main "weapon" of today (except for a striped baton and whistle) - an instrument for measuring the velocity of objects - Doppler radio or laser radar. To begin with, that we should understand what a radar detector and that such a speed trap warning. Radar Detector - is a passive receiver, not overwhelming the received signal amplified signal of the same frequency. Ie it's just a detector, which signals the user that the radius of its action it takes signals to any band, for which he actually set up. These devices are not allowed to sell and use them in Russia. Trap warning - it is an active suppressor of any radiation to which it is configured. Ie when a signal is a suitable frequency switched mode suppression - the radiation of a stronger signal and the distorted modulation (noise). This device is contrary to the laws of the Russian Federation, as is a powerful emitter of radio signals at frequencies that are prohibited for use by individuals. For breach of a penalty charge of dozens of minimum wages with confiscation of the device. What is sold in Russia - a radar-detectors, but the people they are still referred to as trap warning. Since the early 90's in Russia these positions by measuring the rate experienced a lot of updating measurement techniques, ranging from simple radar using outdated now range X (10.5 GHz) is continuous, up to date (for Russia) range K (24.15 GHz) pulsed regime. LISD also stand out - and rangefinders to measure the speed based on the use of a laser beam with a wavelength of 0.7 to 1.0 microns, the active use in Russia began in 2001. By agreement of the State Commission on radio control in Russia are approved for use in radar DPS frequency with a carrier frequency of 10,525 GHz and 24.15 GHz with appropriate approvals. By international standards, these frequencies are designated as X-band (10.525 GHz) and K-band (24.15 GHz). Now it is actively working on implementation of the new Russia's Ka-band carrier frequency 34.7 GHz, and it is planned to introduce in the next two years. All devices that use these frequencies to determine the velocity of an object can be divided into two classes - a device with a constant radiation and instruments with korotkoskvazhnym modulated radiation (pulse). Devices of the first type are in constant exposure of an object, select from the total flow purposes in excess of certain speed to the flow, either in absolute speed. Time measurement is from 1 to 5 seconds (with the control cross-checking). These instruments are outdated, since they do not provide adequate processing speed, and have low resolution. On the territory of the Russian Federation these devices is almost gone. It was also the time when these devices are not used in the constant tracking mode, and so-called offhand »(Instant-On). Ie include it only when traffic police officers saw the object, which clearly exceeded the rate and included on a second device. Currently, radar detector, equipped with a detection mode Instant-On is able to recognize not only this lurid method for measuring the speed, but with 99% probability of radiation of a pulsed mode X band. Devices of the second type have appeared in Russia since the late 90's, and currently hold the absolute position in the field of traffic police. The principle of operation is based on the fact that during a time of 0.3-0.4 seconds fully measure the velocity of an object with a probability of 95%. This type of radiation is the main carrier frequency, which serves 4 or 6 short pulses with low duty cycle signal and a pulse duration to 60 ms. Thanks to the powerful mathematical software allows the device to get to the minimum necessary data about the object, its velocity in a very short time. Now in Russia for a hundred devices with a pulse speed measuring system to account for ten percent of date range X, and the remaining ninety - in the range of K. Ie choosing a radar detector today, this should be taken into account and understand that he must react to these radars DPS. Selling, general and standardized pulse modes: Ultra-X This mode was first introduced in the speech popularized in 2002, when Russia emerged serial models of radars DPS - Sokol. In response, the Korean and Chinese OEMs, developers, under the strict guidance of customers in Russia, all new radar detectors inserted a new programming block in the firmware of devices to track this new regime. The new regime called the Ultra-X, which corresponded to a pulse mode range X. Ultra-K This mode was introduced into use after 2004, when Russia changed generation radar DPS, and mass were produced and act on arms traffic police radar "Berkut", "Iskra-1" and photo-video systems, which include these radars. Russian customers are again turning to producers in Korea and China, once again upgrade the firmware devices, which began to perceive a given pulse mode K-band. POP This mode is a certified American Standard MPH. All radar detectors are manufactured in their own factories, brands Whistler, Cobra, Beltronics, Escort, Valentine One and K40 are now on their "board" licensed recognition system to the pulse mode ranges of K and Ka. This recognition system has a much greater capacity, speed and quality of recognition, rather than Korean and Chinese software "patches". For Russia, the regime has to finish the software for our radar, but after the 100% probability of detection is guaranteed. Instant-On This mode is not as such in recognition of pulse signals, and the radar constant action to be included at the time, but his last modification allow for stable detection of pulse mode range X. Technical note. For measuring the velocity of the radar DPS takes back radiation reflected from the car, and your radar detector - direct, so that the radar detector is always able to detect radar DPS much earlier in time than that to measure the speed of your car! You can actually detect active radar DPS up to 5000 m (under the best conditions, terrain and weather), while the maximum distance of stable readings radar DPS is only about 500-600 m. But of course it is important to know - radar detector is required in 95% of cases in order to catch the radar signal in advance of DPS when the inspector DPS which irradiates a car far ahead of you, trying to determine its speed. So one of the criteria for selecting a radar detector is its sensitivity and the ability to maximize screening false signals. Incidentally, these parameters in the ground and different radar detectors are different price groups. In the late 90's of last century gave way to the era of permanent radar X, K and Ka band for faster and more elusive, short-pulse radar. These devices have pulse shape of determining the speed - a small queue modulirovannh ultrashort pulses (korotkoskvazhnyh) with short duration of the main pulse of the order of 0.3-0.4 seconds. This form is not understood by many radar detectors, and simply can not handle it, considering it a nuisance. According to the site speed trap warning
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