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How a Cell Phone Jammer Works. A cell phone jammer blocks mobile signal within a specified radius. Some years back the use of cell phone jammers was only left for the security department. In the recent past, the use of jammers have been extended to religious and workplace. The device will prevent your phone from call of receiving of calls, therefore, guaranteeing zero phone distraction in a meeting. The working principle of jammer is similar to that that is used for disrupting 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 cell phone jammer is a simple device that operates electronically using an on/off 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. 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 function of the voltage-controlled oscillator is to produce the radio signal that will interfere with the mobile signal while the tuning circuit controls the frequency that 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. The radio frequencies produced are always similar to the ones that the mobile phones operate on. 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 category is meant for the jammers that are larger and more powerful. The jammers operate by blocking the transmission of mobile signal from the satellite to the cell phone tower.
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There are several types of cell phone jammers in the market today which vary regarding quality and size. 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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