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Cell Phone Jammers. A cell phone jammer is always used for blocking mobile signals in a specific area. Initially, the jammers were only used for security reasons by the security department. Currently, the use of jammers have been employed in many areas such as phone usage restricted work places and religious places. The device will prevent your phone from call of receiving of calls, therefore, guaranteeing zero phone distraction in a meeting. The jammers works in the same principle that is used for blocking of radio waves. The jammers are available in different sizes and operating range. The larger the jammer, the larger the working radius range. A good jammer should also be able to interfere with both speaking and listening signals. A jammer operates using electrical power and has a switch button. To determine if it is functioning, the bulb should be on. Small jammers operate using batteries while larger jammers are plugged in into a power socket. Large jammers usually has an external antenna that is useful for sending and receiving signals. A standard cell phone jammer is always made up of a voltage-controlled oscillator, tuning circuit, noise generator, and an RF amplification which are required to perform specific tasks. The purpose of the voltage-controlled oscillator is to generate radio signals that will be enough to block the existing mobile signal whereas the tuning circuit regulates the frequency at which the jammer broadcasts its signal. The function of the RF amplification is to boost the power of radio frequency to amounts that can interfere with a signal while the noise generator is for generation of random electrical output to interfere with the existing mobile signals.
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The working principle of a cell phone jammer is similar to that of a radio jammer. A cell phone jammer generates radio frequencies which are those of a mobile phone. The radio frequency generated will interfere with the ones connecting one cell phone to another. Cell phone jammers are group into two broad categories depending on the mobile signals targeted. The first category comprises of smaller jammers that block the radio frequency signal between an individual cell phone and the cell phone towers. The second group contains the large and powerful jammers. The large jammers usually target the radio frequency signals between the mobile phone tower and the satellite.
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The jammers are always available in different sizes and quality. The common types of cell phone jammer are portable, remote control, adjustable, and school cell phone jammers. There are several other uses of cell phone jammers apart from the ones mentioned above.