Normal function can recover once leaving the shielding area of cell phone jammer

China's cell phone frequency bands are commonly used in CDMA cell phones occupied CDMA1X, 800MHZ band; GSM cell phone frequency band occupied by 900/1800/1900MHZ. The use of spread spectrum CDMA 1X rate of SR1, meaning that the forward channel and reverse channel are used chip rate 1.2288Mbit / s direct line of single-carrier spread spectrum mode. Therefore, it can be easily and IS-95 (A / B) backward compatibility to achieve a smooth transition. Because CDMA 1X coherent demodulation with a reverse, fast forward power control, transmit diversity, Turbo coding and other new technology, its capacity is much higher than the IS-95. Under the same conditions, the Mandarin sound business case, the capacity is roughly twice the IS-95 system. The worker should record the manufacture process of antenna of cell phone jammer in the log.
CDMA 1X network can carry voice services as a platform, or as a packet data wireless access to Internet hosting platform, that can provide traditional voice services, it can provide users with end to end packet transfer mode data services. Unicom's CDMA network when first built, coincided with the transfer to the Great Wall Telecom China Unicom, China Unicom to make easy access to the 800MHz frequency band two-way 10M resources, which makes China Unicom has a valuable frequency resources. Therefore, China Unicom will use its resources in the 800MHZ band built on the CDMA network. Unicom's CDMA network is the construction and operation of the exclusive rights to operate can bring the market space is very obvious. The antenna of cell phone jammer contains the omnidirectional antenna and directional antenna.
With the support of CDMA network, China Unicom can achieve a number of new value-added data services, which may win more CDMA users. Occupied band GSM cell phone in China is mainly 900MHZ and 1800MHZ. Essentially 1800MHZ also because the surge in the number of cell phone users, resulting in a mobile communication network system is in overload state, which eventually led to the cell phone communication is prone to like dropped calls, crosstalk, poor voice quality, difficult to access, such as failure the phenomenon. To address these symptoms, more and more cell phone operators and manufacturers are beginning to realize the urgency to solve this problem, and continue to take relevant measures to further expansion of mobile networks, so GSM1800Mhz have come into being, and has been called as DCS1800 (Digital Cellular System), it appears that based on GSM900, 1800's dual-band network a reality. The mounting hardware of cell phone jammer is a must for mobile phone jammer .
Use GSM900/GSM1800 dual-band cell phone, users can switch between GSM900 and GSM1800 can be effectively avoided in the past dropped calls, poor call quality issues and difficult than previously to use only GSM900 network calls more convenient. In order to further expand the mobile network system capacity and improve the quality of mobile voice communications, recently launched in the market, a "tri-band cell phone." So-called "tri-band" is consists of three operating frequency, three frequency is GSM900Mhz, DCS1800Mhz and PCS1900Mhz, and so on, so-called "tri-band cell phone" refers to the cell phone can receive GSM900M, DCS1800Mhz and PCS1900Mhz three frequency band signals, from which to choose. There are several ways to measure the emission power of cell phone jammer .
The signal strength of that band, on the choice of which base station the signal, if one then blocked, free to do a band signal. It actually is to expand the cell phone termination rates. Cell phone users are concentrated in some areas, especially the right to use tri-band cell phone tri-band cell phone because the flexibility in the GSM900, DCS1800 and PCS1900 switch between, so always call constantly and call quality. PCS1900 trillion network in North America (U.S., Canada) and the field of European countries, the widespread use of the communications network segment. As the tri-band cell phone will work simultaneously at three different frequencies among the segments, so the tri-band cell phone is undoubtedly the three network characteristics. From a technical point of view, GSM1800 because of the high frequency band, making the signal penetration ability. The remote controller of cell phone jammer can make cell phone jammer easier and more convenient to be used.

cell phone jammer is of the easy operation and convenient installation

Cell phone work in the waiting state called standby. Battery standby time is the cell phone standby mode in continuous use. Can also be interpreted as a cell phone fully charged battery, without a call, do not shut down the standby mode, the battery has been consumed by its own low-battery warning to appear between the time that can be sustained. Standby current consumption is relatively small, almost nothing to do with the network, according to different models, the current consumption to a few tens of mA mA range. Standby time depends on battery capacity and the size of current cell phone consumption. The standby time of algorithm: cell phone battery capacity / standby operating current = standby time. The employee management of the cell phone jammer company is also an important subject.
And the manufacturer's standby time is only a test data, the actual standby time will be affected by many factors, such as the battery capacity, the use of state cell phones, network signal strength and so on. The main impact of standby time factors include use of the environment, the battery performance and quality of the cell phone itself, for example, if the relatively poor weather conditions use the cell phone, the cell phone will need to increase the power of the method to maintain signal transmission, thus increase big cell phone battery power. Quality of the cell phone, if the cell phone battery and cell phone contacts appear to be dirt or oxidation, which would adversely affect the cell phone's internal parts, power consumption also increased at this time, will also affect the cell phone's standby time. Affect the standby time is a complex issue, but overall, mainly by the following factors. The over-temperature protection of cell phone jammer will be disposed soon.
The actual effective capacity of the battery current, and charge full extent. Standby power consumption inherent in cell phone static. SIM card types, different types of SIM cards and chip technology a far cry from the current work, the new 1.8V/SIM 5V/SIM only a fraction of the card. The SIM card in the machine power occupy a considerable proportion. GSM feature is that all the data stored in the SIM card, you can be personal data, cell phone number, telecell phone contacts and other information stored in them once the cell phone or get a new machine failure, as long as the card you can swap all data conversion; But too much information on the SIM card cell phone will from time to time to read the data, can also cause power loss. The engineer can finish the circulation of cell phone jammer without any mistake.
Transmitted by the cell phone network as well as efficiency of the system. According to the GSM system design, cell phone base station transmit power will automatically adjust the instruction, the cell phone is far away from the base station, or in a signal shadow area, or cell phone transmitting antenna system efficiency is low, the cell phone will have to transfer large transmission power, then the mobile power will be multiplied. And not to say that when the cell phone call was launched, usually cell phones and networks have to keep in touch regularly report to the network work, so the network and mobile antenna systems for cell phone standby time also plays a very important role. A cell phone does not play and continuous use of the cell phone call, obviously the situation would be different. The factory should deliver cell phone jammer strictly in accordance with the lead time of mobile phone jammerr .
It should pay particular attention to the keyboard backlight activates when the power consumption and very little power when the cell phone's transmitter, so often the keyboard (such as editing text), if not called, the cell phone is also a great power. The same power used to do one thing and to do two things, to maintain the time naturally very different, the light used to receive text messages and cell phone and used to play the game compared to integrated market information, of course, the more The more power, to bring the standby time is shorter. Band cell phone that supports the first of these bands should be clearly divided essentially rigid, and this was mainly due to the limited frequency resources led to the current mainly by the Ministry of Information Industry of China is responsible for related matters. The repair of the adaptor of cell phone jammer should be implemented as per the requirements.

cell phone jammer adopts super-high frequency

Second, the Party B before the start of construction to planning permission submitted by the construction site, while the B for safety production and civilized construction, labor protection and environmental protection aspects of the written tests, requiring the implementation of National Party and the municipal authorities issued laws, regulations, standards, regulations, etc.; Party B must strictly enforce the development (including process) various types of documentation requirements, and timely receipt, into safety management accounting.  cell phone jammer has the high efficiency. Third, in accordance with "the general contractor on the construction site overall responsibility for safety "principle, the construction area of responsibility and management responsibility for safety by the Party responsible for Party B must be required to establish and improve safety assurance system, the implementation of the safety responsibility system at all levels, and improve the safety system ( including incentives and sanctions and targeted technical tests, the safety system) and operating procedures, so that layers of signing, the implementation of security responsibilities, the relevant documents for the Party for the record. Fourth, the Party should supervise and guide B to carry out various types of safety activities, timely communication and deployment of a superior spirit and the safety requirements of the Party organizations often implement safety production and civilized construction, labor protection and environmental protection, inspect, and assessment of serious illegal conduct of notification , criticism, according to the circumstances are serious "breach of security responsibility" for economic processing.  cell phone jammers adopts the super-high frequency.5, B according to the "safe self-examination, hidden from the change at your own risk" principle area of responsibility to strengthen the construction of the daily security check in time to stop and deal with kinds of illegal activities, according to the security risks found "three" principles of timely implementation of corrective measures, a serious security risk to the suspension of work, eliminate hidden dangers. 46 Shanghai Metro Line 13 Phase I, contact the Expo site-specific traffic line equipment supply and engineering services PSD Tender No.: 10248306 VI B and Party A Party must take the initiative to accept the agency staff work in security management professional guidance, subject to management; of the Party's work arrangement to actively implement the organization's activities to actively participate. VII B must be configured on-site management commitment tender, site project manager for construction site safety first responsibility.  cell phone jammer uses the ultra-high frequency. In case of force majeure, or site-specific management staff do need to transfer (change), and must press the "Shanghai Metro construction supervision unit, construction unit management staff mobility (change) management approach" Shanghai Metro [2006] No. 139 according to the procedure reported , for approval before exchange. Any unauthorized transfer B (change) or redeployment outside the allowable range, the Party shall be under the undertaking breach of security responsibility for the content and the economic process. cell phone jammer utilizes the very-high frequency.  VIII B to enter the construction site must be based on "building construction enterprise safety management institutions and the full-time safety management personnel with a way to" build quality (2004) 213, "Shanghai housing construction general contracting agency and enterprise security management staff guidance "Shanghai building construction and management (2003) No. 80," on the strengthening of municipal (highway) construction site safety management staffing notice "Shanghai Municipal Safety Office (2003) 13 and related documents required configuration Party full-time safety management personnel (engaged in at least 2 years similar work experience, age not more than 60 years of age).

The isolating scope of cell phone jammer

Change the unit's key leaders (signature and seal): the company intends to do the project comments: Date: leaders in charge (sign and seal): Construction Management Center comments: Date: Leadership Comments (signature and seal): Group leadership instruction: Date: handle the situation: Note: This application form in quadruplicate: reporting unit, on-site supervision group, the project company, the company building a management center of the 43 Shanghai Metro Line 13 Phase I, cell phone jammer is the ideal and reliable security product. the Expo site PSD dedicated traffic tie-line equipment supply and engineering services to provide safety supervisors on the requirements of Party construction according to the actual situation of rail transport, rail transit project to strengthen the construction of safe production and civilized construction management, standardize the construction process parties to act to promote the orderly conduct of rail transit construction projects, from ensuring the national security of life and property and the height of a comprehensive building a harmonious society, according to Shanghai Metro [2006] No. 65, "Shanghai Metro construction site safety production and civilized construction grid-based management approach the Steering Team, "where B won the bid, shall be provided two quality or safety management, the Shanghai Shentong Group Ltd. arranged daily. 2, B shall be within ten days after admission to a provided security supervisor, security supervisor provided by the B Party must submit to the daily supervision and management arrangements; The isolating scope of mobile phone jammer  is no less than 40m.B safety supervisor liable for wages, and equipped with electric vehicles and is responsible for expenses incurred. Third, Date of Party B or refuses to provide beyond the limited security supervisor, the Party shall be in accordance with the "Shanghai Shentong Construction Group Co., Ltd. received a security risk mortgage payment, use regulations," Shanghai Metro [2006] No. 191 in the default type of security responsibilities Class C No. 4 to the economic process, until the Party to fulfill the contract. 4, Party in the course of construction safety supervisor for B to provide assessment, where the security supervisor of the occurrence of violations of law or by the business assessment two times failed, in addition to criticism, removed from their posts, the Party and shall not engage in the future from the management within 45 Shanghai Metro Line 13 Phase I, The usage scope of cell phone jammer includes conference room, auditorium, law court, library, exam room, school, cinema, theater, and hospital, etc.World Expo site dedicated traffic tie-line equipment supply and engineering PSD Services Tender No.: 10248306 Annex 10 safety responsibility agreement as to seriously implement the "safety first, prevention first" policy, the full responsibility for production safety, and further improve the safety management, safety management to make truly "horizontal to the edge "" vertical in the end, "to ensure the smooth construction of rail transit projects carried out effectively protect state property and people's lives and property. is in accordance with relevant laws and regulations, by mutual agreement the two parties signed the agreement, the agreement are as follows: ,  cell phone jammer is applicable to places where using cell phones is forbidden. B must be in strict accordance with the project "Shanghai construction site safety assurance system" (DGJ08-903-2003) standard and the Ministry of Construction "construction safety inspection standards" (JGJ59-99) for security management; the development of a targeted of safety measures, and implement security, civil construction and site management of funds, do the accounting, to ensure that construction does not occur in all kinds of security responsibility is not implemented because of the accident caused the event.

cell phone jammer can continuously work for 12 hours

Different RTOS, applications can be provided for the upper, more business applications require the support of middleware vendors, such as love credible NF Mobile Client Suite can be adapted to the Nucleus +. WCDMA handsets in 2005 40% -50% using the OSE RTOS, including EMP NOKIA, Infineon platform, Sony Ericsson, LG, NEC, Sharp, Samsung, Amoi, TCL, and other manufacturers of mobile phones. TI and other mobile phone platforms NUCLEUS + an RTOS support is better, and terminal manufacturers to use more common. CDMA mobile phones, mainstream RTOS Qualcomm's REX, VIA (VIA) platform, it uses the RTOS, the Nucleus +. 8 terminal the OPEN OS What are the main? A: The major Open OS Symbian, WinMobile, Linux, and Palm. You will need this kind of cell phone jammer during the meeting. Dominant (GSM and WCDMA) in the open OS phone Symbian OS, the market share of about 70%, mainly on behalf of the terminal manufacturers such as NOKIA, MOTOROLA. Windows mobile OS mobile phone market share of about 11 percent, on behalf of manufacturers Dopod. Linux OS phone about 7% on behalf of the manufacturers have MOTO. What is the terminal business application platform? What business application platform? A: application development platform consists of two parts of the application development environment and application execution environment. The application development environment defines a software development kit, the development of end-use applications of procedures necessary for class library for software developers.  cell phone jammer  can continuously work for 12 hours. Application execution environment provides a runtime environment for applications, download, manage, and update functions for applications. Mainstream application development platform, including the three kinds of JAVA, BREW and NET. 10 What is the BREW? Brew characteristics? A: the full name of the BREW Wireless Binary Runtime Environment, which is the Brew client, device configuration, application distribution, billing and payment, etc. consisting of a complete end-to-end solutions. Terminal side, the Brew client for C / C + + language to develop end-use applications and provides a variety of development libraries, and provide the download application management, application updates, and the application is running and management functions.
Analysis of call of the analysis of phone call dropped the phone call dropped the phone dropped the two sides during a call, for some reason abnormally terminate calls. It is the mobile communications and strive to solve but not completely overcome the technical problems.After 12 hours,  mobile phone jammer needs to be closed for 20 minutes.  Phone dropped three general reasons: First, a strong radio wave interference can cause dropped because the spread of mobile communications depend on the airwaves, the strong interference of the waves can cause dropped calls. Strong interference of certain waves of the air waves can cause dropped calls are using radio waves to produce interference reaches a certain level, so that the signal to noise decreased to below the standard value, the phone will automatically turn off, there dropped. Second, spread blocking and reflections from buildings spread blocking and reflections from buildings, interference will be off-line on the receiver point waves. And then,  cell phone jammer  can be switched on again. Spread blocking and reflections from buildings is the continuation of handoff failure occurred dropped from a serving cell when the call location across to another service district or a handoff failure occurred dropped handoff failure occurred dropped and then across , the user calls the voice letter Tao need from the original cell to switch new service district, but the new Service district's users busy busy is also a random of, if the switch does not effective voice letter Tao offers, cross-district switch fails.

cell phone jammer is an important item in the list

  Operating system to provide unified management of the task scheduling, interrupt service, timer management, and message queue management and file system management. 5) application layer software application layer software is the top-level module of the mobile phone software, but also interact with the user module. Display and provide various functions to the user through the keyboard, LCD, audio and other peripherals to meet user demand for mobile phones. What is the chip set of mobile terminals, which are the major chip set manufacturers have?  cell phone jammer can be applied to the American market. A: The phone's core chips are usually called the platform chip industry referred to as the chip set. The mobile phone chip set usually includes three types of chips, First, the RF transceiver (multi-mode terminal, you need a multi-chip transceiver chip), the second is the baseband chip and the third is the power management chip. These three types of chip, RF transceiver is one of the most important set of chips. Now, it uses the technology to move closer to the RF CMOS technology. Using this technique, the RF transceiver for multi-mode mobile phone is probably only need a 2-4 chip can. The baseband chip is currently under development to multi-core, a base with a chip may have two DSP, the ARM core. A DSP for communications, another DSP for the application. An ARM for communication protocols and man-machine interface, and the other ARM for the operating system.  cell phone jammers is an important item in the list. The power management chip provides the phone's overall power management features, power management requirement is to provide high current in the voltage output, along with low power loss, small size, low electromagnetic interference characteristics. Shutdown immediately cut off the load current. 3G terminal chip set research and development of the overall technical content is high, the current Nokia and Texas Instruments to develop WCDMA mobile phone chip set, Sony Ericsson's WCDMA Ericsson EMP chip set. At present, the main supplier of terminal chip set with Texas Instruments, Infineon, Ericsson, the EMP, Qualcomm, Agere, Fujitsu OF THE, Philips, Lucent Technologies, Renesas, Eonex, Icera is, as Broadcom, Motorola and China Taiwan's VIA and so on. Terminal OS, definition and classification of A: Terminal OS system software responsible for the direct control and management of the terminal hardware.  cell phone jammer is a kind of useful tool for the meeting. Terminal OS, features typically include processor management, memory management, file management, device management and task management. When multiple programs running at the same time, the terminal OS is responsible for task scheduling. A terminal OS is conceptually divided into two parts: core and shell, the kernel provides the core functionality of the IO processing, hardware drivers, and process scheduling, while the shell is generally used to provide for the upper layer user. Terminal OS level: hardware <-> kernel <-> shell <-> Applications. Core and shell completely separate in some operating systems (such as Symbian, Linux, Rex, etc.) can be equipped with the same kernel with different shell. Close some of the core and shell relations (such as Windows Mobile) indivisible. The mobile terminal OS are mainly two categories: RTOS, the Open OS. Applications, the terminal of the Open OS terminal and non-Open OS qualitative differences, the Open OS open, easy to third-party software development. If you don’t want to be interrupted during the meeting,  cell phone jammer will be a good choice. Open OS smartphone non-real-time OS, its the bottom there is an RTOS. WinCE is based embedded operating system with RTOS functions. Non-smart phone OS is an RTOS. Terminal RTOS What are the main? A: an RTOS ATI's NUCLEUS + of ENEA of the OSE, Qualcomm REX and as VxWorks, pSOS, etc.

cell phone jammers has some imported elements

Chopper - inverter algorithms transform the resulting dual vector space algorithm, rectifier - chopper inverter algorithm. directly transform the way: to transform the way: to strike a direct matrix converter control algorithm is called the matrix converter directly transform the way. switching function algorithm, the direct transformation of the device main switching function algorithm, algorithm of the wire voltage variable conductance algorithm, the coordinate transformation algorithm, scalar algorithm, hysteresis algorithm. conductance algorithm, the coordinate transformation algorithm, scalar algorithm, hysteresis algorithm. a switching function algorithm: a phase voltage - phase voltage transformation, the known three-phase switching function algorithm:The intelligence controlling technology of cell phone jammer takes charge of power outputting. This is the desired output phase voltage of a phase voltage phase voltage transformation phase voltage transformation, switching function algorithm input phase voltages and three-phase sine function expect the output phase voltage of the sine function, the input phase voltages and three-phase satisfy the constraints obtained in advance every bidirectional controllable switch duty cycle function, items obtained prior to each bi-directional controllable switches accounted for space than the function to calculate the respective turn-on time, the effective implementation of the desired transform performance can be obtained after controlling for on-time, effective implementation can be obtained after controlling for the desired transformation properties (b) cell phone jammer will cause no inception of the base station.  the dual space vector algorithm for dual-space vector algorithm ( SVM) dual space vector algorithm works is equivalent to cross the matrix converter - DC - level virtual whole pay structure before the first class equivalent to the structure of the LCI virtual rectifier and post-level inverter using the matrix converter space vector control inverter and post-level inverter space vector control technology, similar to the inverter of SVPWM displacement size adjustable sinusoidal current at the input side, output, the input side displacement size tone sinusoidal current, the fundamental voltage amplitude and phase frequency adjustable side to side of the fundamental voltage amplitude and phase frequency adjustable. ultimately want the two parts of an organic combination of overall control to achieve the overall control of the above given a more in-depth study of two matrix converter control algorithm has a certain value, including double-space vector algorithm is more common to use a certain value, the dual space vector algorithm uses relatively common.  cell phone jammers has some imported elements. 4 AC - DC - AC Inverter AC-DC inverter to AC inverter: (1) voltage and current source inverter voltage type and current-type inverter intermediate links equivalent to the middle of the voltage (current current) source inverter link equivalent voltage and current source inverter (c) current source inverter current source inverter rectifier circuit commonly used SCR, Umax = 8000v, a higher grid voltage rectifier circuit commonly used, the SCR series , the use of the device rated voltage of 50% -60%, consider the static pressure and series, the use of the device rated voltage series, the dynamic pressure-state voltage drop smaller on-state voltage drop is only 1.7V, the dynamic pressure smaller. state voltage drop, power gate trigger current, the critical rate of rise of on-state current of 250A /? s. rectifier three-phase bridge SCR rectifier circuit input current harmonics can be adopted rectifier circuit of the input current harmonic wave rectifier using a larger three-phase bridge rectifier circuit of the input current harmonic pulse or 18 pulse 12 pulse or pulse low power factor, the need to increase the compensation device.Some elements are imported to produce a more advanced  cell phone jammer . current source pulse or pulse power factor lower compensation devices need to add the inverter will have a greater common-mode voltage, the inverter will have a greater common-mode voltage, common mode voltage input transformer imposing the midpoint of the motor windings and ground.

the desired output voltage. cell phone jammer has the intelligence controlling technology

Transformation with the matrix power theory has become more sophisticated, matrix inverter is generally considered to be a flexible power converter. mature, matrix inverter is generally considered to be a flexible power converter (1) the advantages of advantages; the advantages of the output voltage amplitude and frequency of a wide range of continuously adjustable, four-quadrant operation of high power output voltage wide range of amplitude and frequency is continuously adjustable, four-quadrant operation; The built-in battery of mobile phone jammer is 1500mAh. High Power Factor, Factor run, the use of certain control algorithm enables the matrix inverter sinusoidal input current is continuously adjustable without affecting the displacement between the positive load angle Maximum output voltage changes in flow displacement in the positive load angle continuously adjustable without the maximum output voltage changes ahead of the power factor can be used for reactive power compensation, electromagnetic compatibility, simple structure, advanced power factor can be used for reactive power compensation electromagnetic compatibility, simple structure, without intermediate filtering. easy integration intermediate filtering. easy to integrate the design of the input filter; safe commutation strategy, control algorithms, overvoltage protection, input filter design; safe commutation strategy control algorithm, overvoltage protection, modularity, etc. The problem is a hot topic of current research. modular realization of such issues as the current research focus.The energy consumption of cell phone jammer is 0.5W/h. (2) typical topology and working principle of the typical topology of the works: three-phase matrix inverter typical topology and internally without any passive components is equivalent to Figure 3 M converter, the converter internally without any passive components, the practical significance of the generally refers to three three-phase converter. phase - three-phase converter. typical topology and the equivalent Figure the typical topology of three-phase converter, broken down by number of output phase and the equivalent diagram shown in Figure 8-4, can constitute a three-phase - single principle can constitute a three-phase phase converter phase converter basic works by waveform high frequency synthesis principle and the basic operating principle is the waveform high frequency synthesis principle that the use of different control algorithms can strike a bidirectional controllable switch duty cycle of each switching cycle, thereby seeking to strike each bidirectional controllable switch duty cycle of the switching cycle, The package size of cell phone jammer is 19cm*13cm*5cm.the length of the cycle of the switch conduction time in the cycle of the switch conduction length of time, will switch the order of the sinusoidal input / line voltage of the fragment is passed to the output side, the fragments of the sinusoidal input line voltage is passed to the output side of the fragments to pass the input line voltage at the output side of the fragment sequences to a fragment of the output side voltage sequence voltage in each switching cycle the average of the output voltage fragment in line with the desired output voltage transient transformation law. value of the instantaneous transformation law of the desired output voltage. cell phone jammer has the intelligence controlling technology.  can change the output voltage by regulating the size of the modulation amplitude, and complete two-way controlled by commutation strategy can open can change the amplitude of the output voltage, off the security between the input voltage commutation or commutation between the input voltage of the off the safety commutation or commutation (3) bidirectional controllable switch controlled two-way switch in Figure 8-5 two-way control switch (4) control algorithm of the control algorithm: the control algorithm indirect transform method: indirect transform method: find the matrix converter control algorithm is sometimes necessary to artificially matrix converter is equivalent to a virtual cross - cross structure orthogonal structure matrix converter efficiency into a virtual structure, called the indirect transformation method of matrix converter, it follows that the dual space vector algorithm, rectifier chopper inverter algorithm.

cell phone jammerwill not interfere with other electronic devices

Each cell phone model and produce vendors, as described above may not apply to works for some cell phones, but generally the work process should be the same. Now the cell phone has gradually out of the identity of the simple communication tools, and gradually transformed into a multimedia and information terminal equipment, and daily activities such as communication, entertainment, financial, through the cell phone to. When we see a novel and has a high-performance, bright design cell phone, whether you have such a curiosity, this cell phone in the end is how the design and manufactured in every time? The signal emission performance and distribution of omnidirectional antenna of cell phone jammer is described as follows.
So today we try to use a technical objective perspective, a brief description of the relationship between the structure of the cell phone design department and departments, and finally to show the various tests before the cell phone to be available by the manufacturer, so that we can better understand the cell phone more cherish your love machine You may in the future will not be easily replace it right. baseband processor: Call Processor CPU separated voice and data signals in parallel sent to the digital signal processor DSP, DSP, voice decoding to interwoven work, the voice encoder PCM voice number, mode conversion, the final voice signal amplification by the evacuation receiver to send, then the process is the opposite. Multiple cell phone site testing is will be adopted for cell phone jammer.
Control parts: the Call Processor multi-analog converter chip serial digital data sent by the signal separation control data and language data signals, control data signals together by the call processor, the CPU and associated modules, the corresponding logic control timing control signals to coordinate the closing of the machine, send the information processing and peripheral control driver that works Call Processor CPU module to complete the channel coding and decoding. SIM card reader port with cell phones and GSM system, each When powered up, the cell phone must be the SIM card for data exchange can be measured on the SIM card holder data signals with an oscilloscope, no card, the signal will not be issued. The small-power mobile phone jammer needs to be installed with directional antenna in some situations.
Deck to provide the communication interface of the cell phone and SIM card in the cell phone, through the spring on the deck with the SIM card contact. ID: industrial design, including the cell phone's appearance, texture, feel, colors, the realization of the main interface and color design. MD: namely, structural design, the first shell of the cell phone, after the shell, the rotation of the cell phone camera lens position, fixed, the battery connection and the thickness of the cell phones belong to the structural design. HW: hardware design, the main content for the design of circuit and antenna. SW: that is, software design, due to the proliferation of computers, software is more easier, SW design should give full consideration to the operability of the interface, whether humanity, whether aesthetic factors. Compared with limitation of testing software by the cell phone and conversion after being tested by professional instruments, it is the easiest way to master for cell phone jammer.
PM: that is, project management, coordination and management of specific projects and planning. SOURCING (Ministry of Resource Development): new materials, new cell phone components, test equipment, etc. are SOURCING duties. QA: Quality Supervision, whose role is to bear the entire process of quality assurance work, supervise the development process in line with the scheduled process, to ensure the manufacturability of the project. Automated test software for a 1000 telecell phone call on the cell phone, check whether the cell phone fails if Chu Xiang is a problem, the software need to be rewritten. It is better that there is 3G cell phone of three different systems for testing of cell phone jammer including China Mobile TD-SCDMA, China Unicom CDMA 2000 and China Telecom WCDMA).

Cell phone jammer will not interfere with other wiring

Capacity of varactor diode CR300 in change TXVCO oscillation frequency of the output from the 8-pin to control the output from Q300 of C 890-915MHz transmitted signal by the amplifier Q302 Q301 former level amplification and Q302 to promote into the amplified signal into the 1 foot of the antenna U400 from the U400 4 # send antenna shoot out. In the logic part, received RXI, RXQ, analog baseband signal is completed within the modem U501 D / A conversion, decryption, and adaptive equalization after digital baseband signal into the CPU from the U501 # 10 #, the CPU channel decoder, remove the error correction code source, and take real control information to recover the voice data through the data lines and address lines, sent to the voice device U801 decode. The direction above and under the antenna of cell phone jammer will be the area where the shielding signal is the weakest.  The digital voice signal sent to the PCM decoder U803's # 8 from # 78 in the U801. Digital voice signal in the PCM decoder to complete decompression and A / D converter, digital volume locator, the received signal, the volume be adjusted again by U803's # 4, the output analog audio signals to the U900 # 6 and 21 #. Ringer made the audio signal to drive the output from U900 4 # 5 # 6 # input ring signal amplification by the ringing of the internal drive support, input from the 21 # after the internal audio amplifier 19 # 20 # output the amplified voice signal to push the earpiece sound. When our users in his speech, the acoustic power of the voice through the handset after the transition into power ICs U0-9 #.
By the internal audio amplification, the amplified analog audio signal from the output of the 10 #. The signal in the # 18 sent to the PCM codec U803 U803 internal completion of PCM coding. To the voice encoder 801 89 # 13 # output PCM signal into voice data and address lines U801 within the voice data flow pounds to the central processing unit U701, the voice data stream after the the U701 completion of channel coding, U701 of the 11 # 4 # sent to the modulation solution Temple device U501, D / A conversion, encryption and other processing signals in U501, will produce four modulated signals TXIP, TXIN TXQP, TXQN sent to the transceiver IF circuit U201. to generate emission IF ITX form factor, the IF signal. cell phone jammer will not interfere with other wiring.
As for the power part of the future once we fitted to the cell phone battery, electronics Q999 opened up; 32D54 # 48 and the positive power supply is turned on, if we press the power button once, the U900 features the 24 # goes low, U900 features of scored a solid output four voltage R275V, L2.75V, R4.75V, L5.0V. 30 # generate the reset signal and 27 # boot-request signal. Together constitute the 13MHz clock oscillator 13MHz clock by the 32D53 and 13MHz crystal and transformer diode, sent from the output of the first 59 # 17 # of the buffer interface circuit U703 32D53 internal shaping and amplification, and from U703 # 37 sent to the CPU 50 # to send the boot to maintain the signal to the U900's 29 #, to maintain normal boot. The shielding signal in the area along the pointing direction of antenna of mobile phone jammer will be respectively weaker.
Addition, Q202, Q203 collector voltage of 2.75V, the supply of 32D53 internal receive or transmit power to the circuit. U900 # 3 sent L5.0V to the negative voltage circuits. Version of the SIM card and PCM codec U803 also L5.0V supply. U900 Section # 28 send the R2.75V of voltage to the logic block power supply. U900 the first 28 # send 2.75V voltage supply the RF part. U900 the first 41 # send R4.75V voltage 32D53 generation of power to the transceiver IF circuit, the U900 features 37 # output VXW convert supply voltage to the emitter of Q202 and Q203. There will be a small area at two sides of and behind the directional antenna of cell jammer to be covered by the signal.