Cell phone jammer is of small power and little electric energy consumption

Cellular Phone Jammer only makes the mobile phone can not send or receive the telecommunication signal when entering the shielding area. Finding The result: when the directional antenna direction roughly aligned Tobacco Monopoly Bureau (linear distance of about 10 meters), the antenna about 30 degrees angle search swing around, the signal level on the slightly larger (about-75dBm); beat sound signals Some are also a little sharp, just in the direction of interference within the coverage area. After preliminary analysis, taking into account the City by the Road open terrain, good conditions to facilitate the monitoring, we quickly start monitoring vehicle, while monitoring side entered the train station, this time, the monitoring system displays the signal strength gradually increased, the level is-65dBm or so.
cell phone jammer  is of small power and little electric energy consumption. Repeated measurements by multi-point foot compared to the cross and positioning to determine the source of interference in the basic Weibin district government hospital, we use field approximation, while walking more while finding, tracking the direction of the strongest signal search forward, when close to 2 floor, the signal strength increased significantly, Building 2, the line to the conference room near the line pointing to the meeting room the day when the signal strength to rise to-50dBm or more on foot, and beat out the sharp tone of the signal, interference in this conference room. By asking the district government official to know: This conference is being held for security, prohibit the use of mobile phones during the meeting, so in the conference room fitted with two cell phone signal jammers. 11:50, we are the cell phone signal jammers were examined, and its power is divided into large and small second gear, the current set of high-power profile.
cell phone jammer will do no harm to the human and various electronic equipments. Four-channel models can be effectively shielded CDMA, GSM, DCS, PHS mobile signal, shielded Bandwidth CDMA: 869MHz-894MHz GSM: 925MHz-960 MHz DCS: 1805MHz-1880MHz PHS: 1900MHz-1990 MHz. We think: The cell phone signal jammers transmit power, shielding range for standard wide, the base station is interfering Netcom causes of poor communication. After shutting down the experiment, the interference signal disappears, reflecting the base station to monitor the engine room back to normal communications. I stood fast and accurate investigation of the radio manager level, to establish the station in the middle unit and the local people get a good response.
Case: May 2003, Baoji City, Town Qianyang Cui, Town Longxian solid mobile users call in the area there is a single-pass phenomenon. According to different sensitiveness situations of different cell phones, cell phone jammer can make various mobile phones in the shielding range lose the signal within several seconds after it is turned on to shield various mobile phones from sending and receiving the signal.
Analysis: From the CDMA base stations and GSM base station location analysis, the main factors are: the electromagnetic environment requirements. Any type of radio (stations) should leave the man-made radio noise sources (such as substations, electric railways, airports, railway stations, welding, heat sealing machine, X-ray machines, etc.) far enough; radio interference protection. More base stations set up at the same location in the case, to consider the same radio signal between the radiation may be directly or indirectly interfere with. The distance between the base station meets the requirements of protection, particularly the use of similar frequency band, interference must be tested and