precisejammers的部落格

The weather can also affect the effectiveness of the jammer

1. At present, the power and channel of each base station are different, and the distance from each base station to the prison is also different.
2. It is generally recommended that the gsm jammer is located within a monitoring area of 200 meters or 300 meters without the need for a base station laptop to be installed.
3. If there are base stations, it is necessary to consider the impact of strong signal shielding on high probability base stations.
4. The scale, number of buildings, structure, height, and floor height of each prison vary.
5. The distribution direction, power, terrain and other factors of mobile phone base stations around each prison are different, and the strength of Mobile phone signal signals transmitted by remote base stations are also different

Generally, the transmission power of the Mobile phone jammer is tested within 30W in the test room, so the theoretical shielding range of the Mobile phone jammer in the test room is about 0~20m. But please note that this is the theoretical distance. The actual effect should be combined with local signal strength, especially when there are signal base stations nearby. If there is a signal base station within 200 meters, the shielding effect will be greatly reduced. Walls can also weaken the shielding effect of radio interference devices on laptops. Due to the strong signal near the window, the shielding effect will be weakened. The standard classroom of the school is usually about 75 square meters, and each classroom is equipped with a Mobile phone jammer to achieve better results. It can be placed in the middle of the classroom for maximum protection. Of course, this must be determined in conjunction with the power wiring. It is also common to place cell phone jammer on the podium.

GPS utilizes the satellite system and sends signals. The youth and human rights promoters add that cutting off mobile phone communications can deprive them of freedom of expression since Great Britain has a huge population of mobile phone subscribers. Almost an hour later, a double-decker bus on Upper Woburn Place near Tavistock Square was also hit; the bus’s roof was ripped off by the blast. The GPS signal jammers work by interrupting the signals that come from the satellite and making it impossible for a device to operate.

Nearly simultaneous explosions, at about 8:50 a.m., occurred on trains in three locations: between the Aldgate and Liverpool Street stations on the Circle Line; between the Russell Square and King’s Cross stations on the Piccadilly Line; and at the Edgware Road station, also on the Circle Line. Triangulation is basically a technique and method in which three different points are considered for computing location. They fear that the devices could lower the transparency on government activities and suspicious doings by political officials, wherein mobile communication can become useful sources of evidence in fighting political crimes.