Cell phone jammer connects with the base station by wireless electric wave

6 the use of digital frequency synthesis module equipment, shielding region of the technology to track the strong signal frequency and Nate channel pilot signal, the phone can not establish contact with the base station to improve the shielding efficiency, greatly reduce the intensity of electromagnetic radiation. 6 nine, the system requires a major equipment. Equipment should be used by police testing and certification of electronic products, the product must be mature, successful use of a large number of prison cases.   cell  phone jammer    connects with the base station by wireless electric wave.(2) the operating frequency range of equipment must be strictly limited to downlink band, causing interference to other systems is prohibited. 3 modular structure of the host device must ensure the system stability and future upgrades. 4 All modules have a power output short circuit, open circuit protection. In the impedance mismatch, the device can still work. 5 equipment module with fault monitoring interface, adding fault alarm module can realize network monitoring. 6 at ambient temperature -10 ~ 40 ℃, the continuous operation a year later, the frequency bandwidth of drift: 1) Sweep equipment: 870 ~ 880MHz: overflow 2MHz frequency drift within; 930 ~ 960MHz: less than 2MHz frequency shift overflow; 1805 ~ 1850MHz: overflow 3MHz frequency drift within; 1900 ~ 1920MHz: overflow 3MHz frequency drift within; 2130 ~ 2145MHz: overflow 3MHz frequency drift within; 2) of frequency equipment: frequency accuracy: 0.001 MHz; frequency step: 0.2 MHz; dwell time Accuracy: 0.01μs; time step: 0.01μs; adjustable dwell time: 0.25ms ~ 1000.00ms; for frequency time 2.5μs.  cell  phone jammer finishes the data and sound transmission by a certain baud rate and type of modulation. 3) TD pilot synchronization error ≤ 2.5μs. 7 X. guarantee a safe and reliable system. There can be people outside of the device can not be shut down, regulation, and negative components such as: plug-in power supply, external switch, external power tuners. (2) Equipment must be able to withstand the harsh environment requires continuous operation throughout the year. 3 equipment, cooling ability, the ability to take full advantage of natural heat, extreme heat in the summer period, temperature control can be configured to force cooling. 4 field devices must have the ability to adapt to the strict field, with a waterproof, moisture, corrosion, pollution prevention, lightning protection capabilities. 5 all devices have the power overload, short circuit, lightning, overvoltage protection and other self-recovery capability. 6 less than five years life of the equipment itself. Directing at this working theory,   cell  phone jammer    scans from low-end frequency to high-end ones in forward channels in a certain speed during its working process. XI, equipment, system installation standard 1 installation height allowed under the conditions in the built environment from the ground must be ≥ 2.2m, install the correct, secure facilities to ensure normal and stable work; less in the case of the wall must be used for reinforcement. 2 outdoor and aerial equipment must be installed 11 wind-resistant, and has anti-corrosion, water, lightning protection measures. 3 outdoor cable connectors must be used within the one-component room temperature curing silicone rubber seal, plus a pressure-sensitive tape or heat shrink rubber seal and the secondary protection. 4 cable construction process must comply with the technical specifications. 5 when the system is installed to ensure that technical requirements should also consider the case without damaging the original building structure, style and decoration requirements. The scanning speed of   cell phone jammer could form irrecognizable characters. 8 XII 1, project acceptance criteria through professional equipment such as spectrum analyzers, special testing antennas, standard antenna test stand, signal testing mobile phones, on the shielding performance testing, effectively shielding the rate should reach 99.9%.