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Cell Phone Jammers. A cell phone jammer is always used for blocking mobile signals in a specific area. The jammers were initially left for use by the defense sector for security purposes. Currently, the use of jammers have been employed in many areas such as phone usage restricted work places and religious places. The devices has also been used to ensure meeting runs smoothly without phone distraction by disallowing phone calls and messaging. The technology employs the same principle that is used for disrupting radio waves. The jammers are available in different sizes and operating range. The larger the jammer, the larger the working radius range. A jammer is considered to be of a good quality if it can block both speaking and listening signals. A jammer operates using electrical power and has a switch button. It always has a light that lights whenever it is switched on. Larger jammers are always connected to an output power source while the smaller ones can use batteries such as phone batteries. The antenna is used for sending and receiving signal, larger jammers usually have an external jammer. 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 noise generator is to generate random electrical output in a specified range to interfere with the mobile signals while the RF amplification is used to enhance the level of radio frequency so that it can block a mobile signal.
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The working principle of a cell phone jammer is similar to that of a radio jammer. The radio frequencies produced are always similar to the ones that the mobile phones operate on. The function of the radio frequencies generated is to interfere with the existing mobile phone signals. The cell phone jammers available are grouped into two categories according to how they block the signals. The first category comprises of smaller jammers that block the radio frequency signal between an individual cell phone and the cell phone towers. The other group is meant for large and powerful jammers. The second category usually operate by causing interference on the radio frequency signals between the satellite and the cell phone towers.
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The jammers are always available in different sizes and quality. Some of the common cell phone jammers include portable, remote control, adjustable, and school cell phone jammers. The use of cell phone jammers are not restricted to the ones mentioned above since you can also install them in your home if you want privacy.

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