Cell phone jammers are all very big for most of the mobile phone battery consumption. No signal, the phone turned on the cell phone jammers, mobile phone base station signals will be shielded, actually disturbed, unable to form normal communication between the base station, and then, a lot of phones have this feature: to be very efforts to search for the signal, which led to more than the normal standby to consume a lot of power!
Shield mobile phone signals can interfere with radio signal receiver? The phone is masked when someone texted me to receive it? Or unmask previously sent text messages to receive it? Phone SMS masked other people is not received, or receiving a call does not work. Unmask phone jammers to shut down or leave the area of ??the cell phone signal jammers work, others sent to you by SMS, the same day that you received, if earlier, such as yesterday or more earlier depends on your SMS mobile communications service providers service function. Similarly, if you are in the shielded by phone, others dial your phone, if your phone is opened caller treasure or similar business, the signal is restored, will receive missed calls SMS prompts. Phone signal jammers can configure antenna is omni-directional antenna, it can be switched to a directional antenna.
The omnidirectional antenna in the usual use, the most commonly used toward the antenna remain vertical overturned. Omnidirectional antenna signal coverage based on the omni-directional antenna for transmitting the signals characteristics, can be generally seen as is the antenna to the center of a spherical region, but in fact, the extension line of direction of the antenna ends the signal transmitting the weakest region, so If you want to play the greatest signal coverage radius omnidirectional antenna, it should try to avoid the antenna toward the area most want to be shielded.
For instance, when the omnidirectional antenna overturned vertically installed, the area around the antenna is shielded signal transmission in the farthest region, while the antenna is facing the top of the sky and the ground below the weakest region of the signal direction is shielded. Similarly, if encountered in using an omnidirectional antenna, phone shielding signal coverage is too wide, it is possible to appropriately adjust the antenna orientation, antenna pointing do not wish to be shielded area, then, the antenna pointing area masking signal will be correspondingly weakened. When the scene environment requires more accurate shielding region that do not need to be shielded, or exist in the periphery of the area is masked, it is recommended to use a directional antenna, the directional antenna can mask signal, the relative concentration of transmitting toward a block area, directed toward the area of ??the antenna the furthest regions shielded signal transmission, should pay attention to: directional antennas on both sides and behind there will be a small part of the region is shielded signal coverage.
Cell phone signal jammers installed in the outdoor environment, it is necessary to do a good job waterproof, lightning protection measures, is generally recommended to the cell phone signal jammers optional special mounting box, the special installation box enclosure made of metal, both sides have one hundred window-ventilated location, the antenna box at the top openings extending phone jammers, power input holes and guide holes in the bottom of the case.
Source: http://www.cellphone-jammer-china.com/cell-phone-signal-jammers-installed-in-the-outdoor-environment/
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