The PCB board of the adapter of cell phone jammer

Conductive pads can be used to make the appropriate size of the gap size within the prescribed limit, in order to achieve this attenuation effect. Shielding design difficult because the shield joints turn will lead to a decline in efficiency will be reduced so shielded. Note below the cutoff frequency of the radiation attenuation depends only on its diameter than the length of the gap, such as length to diameter ratio of 3 available 100dB attenuation. Perforation in need, you can use thick shield above the waveguide properties of the hole; another to achieve a high length to diameter ratio method is to attach a small metal shielding material, such as an appropriately-sized pad. Here is the switching-on inspection of the adapter of cell phone jammer.The principle and in the promotion of multi-joint case constitutes a porous shield design basis. Porous thin shielding layer: porous many examples, such as thin sheet metal air vents, and so on, when the closer spacing of the holes when the design must be carefully considered. The following shielding efficiency of such cases the formula SE = [20lg (fc / o / σ)]-10lg n which fc / o: cut-off frequency n: number of holes note that this formula applies only to the hole spacing is less than the diameter of the case can also be used to calculate the relevant metal braid shielding efficiency. Joints and contacts: welding, brazing or soldering is thin between the common way of permanently fixed, occupies a position of metal surfaces must be clean, to make the joints completely filled with a conductive metal. The components inside the adapter of cell phone jammer should be the same as those inside the sample.Not recommended for fixed with screws or rivets, fasteners because of the low resistance junction between the contact state is not easily sustainable. Conductive pads is to reduce the slot seams or joints, holes or gaps, so that RF radiation is not distributed out. EMI gasket is a conductive medium, used to fill gaps within the shield and to provide a continuous low impedance contacts. EMI gasket are usually between two conductors can provide a flexible connection, so that the current spread on a conductor to another conductor. EMI gasket sealing the choice can refer to the following performance parameters: The shielding efficiency of a particular frequency range Adhesion method and seal strength Compatibility with the current housing and the corrosion resistance of the external environment.  The tin-coating of the component inside the adapter of cell phone jammer is good without dry joint and build-up.Operating temperature range Cost of most commercial pads have sufficient shielding to enable equipment to meet EMC standards, the key is properly within the shield design of the gasket. Gasket system: a key factor to consider is compressed, the compression gasket in between the liner and high conductivity. Gasket between the liner and the poor will reduce the conductive shielding efficiency, the other joints occur if the less a slit-shaped groove formed by the antenna, the radiation wavelength smaller than the gap length of about 4 times. Ensure continuity gasket surface first to ensure a smooth, clean, and by the need to address in order to have good electrical conductivity, these surfaces must be covered before the engagement; other cushioning material such shielding gasket bonding with continuing good also very important. The PCB board of the adapter of cell phone jammer has no short circuit, open circuit and the copper sheet has no tilting.Compressibility characteristics of conductive pads can make up any irregularities in the gasket. All pads have a minimum contact resistance and effective work, designers can increase the compression strength of the cushioning pads to reduce the number of the contact resistance, of course, this will increase the sealing strength, the shield will become more curved.

The silicon steel sheet of the adapter of cell phone jammer

Most of the original thickness of the liner in the compressed 30% to 70% better results. Therefore, the proposed minimum contact surface within the concave point between the two opposite pressure should be sufficient to ensure that the gasket between the liner and has a good electrical conductivity. On the other hand, the pressure on the pad should not be so large that the liner is non-normal compression state, because at this time will result in contact with liner failure, and may produce electromagnetic leakage. The coil wrapping of the adapter of cell phone jammer has no oxidization, looseness and tilting.Separation requirements and gasket compression control for the gasket manufacturer's recommended range is very important, this design needs to ensure the gasket with sufficient hardness to avoid large bend between the washer fasteners. In some cases, may require additional fasteners to prevent the shell structure of some bending. Compression is also turning an important feature of the junction, such as location of the door or flapper. If the liner easily compressed, then the shielding performance with each rotation of the door down, then liner power required to achieve higher compression the same with the new gasket shielding performance. In most cases this is unlikely to do so requires a long-term EMI solution.The silicon steel sheet of the adapter of cell phone jammer has no oxidization, looseness and tilting. If the gasket by a shield or coated with a conductive layer made of plastic, then add an EMI gasket will not have too many problems, but the designer must consider many in the conductive pads on the surface, there will be wear and tear, usually metal liner coating the surface easier to wear. Grow over time this will reduce the wear liner junction of shielding effectiveness, and to the back of trouble makers. If the shield or gasket is a metal structure, then spray a polishing pad material can be added prior to the gasket surface of the wrap, just use conductive film and tape can be. If the bonding pads on both sides are using tape, you can use the firmware on the EMI gasket for mechanical fastening, such as with plastic rivets or pressure-sensitive adhesives (PSA), "C-type" liner. Here is the electrical performance of the adapter of cell phone jammer.Pad mounted on the side of the gasket to complete the EMI shielding. Liner and accessories currently available are very much shielding and cushioning products, including beryllium - copper fittings, metal cable (with or without elastic inner core), the metal mesh embedded in the rubber and directional lines, conductive rubber, and has a metal coating polyurethane foam pad and so on. Most manufacturers can provide shielding material liner to achieve a variety of estimates of the SE, but remember that SE is a relative value, but also on the porosity, pad size, pad compression ratio, and material composition. There are a variety of pad shapes, can be used for a variety of specific applications, including wear, sliding and hinged occasions. Many pads with adhesive or liner above, there fixtures, such as extrusion insert, insert or barbed pin devices. Various types of pads, the coating foam pad is the latest and most versatile products on the market one. Here is the high voltage testing of the adapter of cell phone jammer.Such pads can be made into a variety of shapes, thickness greater than 0.5mm, the thickness can be reduced to meet the UL seal combustion and environmental standards. There is another new type of liner that environment / EMI gaskets mix, with it can no longer use a separate sealing material, thereby reducing the cost and complexity of the shield.

The cell phone jammer blocker should be plugged into the car’s lighter socket after starting the engine

Data transmission channel to allow three simultaneous synchronous voice channels, each bandwidth of 64kb / s; voice and data can also be mixed in a channel, a 64kb / s simultaneous voice connections and an asynchronous data connection. Network connection using encryption, password authentication used to connect devices at the same time, both with seven other devices within the network constitutes a Bluetooth Micro (Piconet), 1 a Bluetooth device can simultaneously join eight different micro-network, respectively, each micro-network 1Mb / s of transmission bandwidth, when two or more devices to share a Channel, it can constitute a Bluetooth piconet, a device by which the dominant traffic, when the device is not yet a Bluetooth piconet, it first enters standby the state. cell phone jammershould be protected well.
Hong Kong Bank, Europe is revised to change all machines and they generally refers to foreign countries, Hong Kong, Macao, Taiwan region without going through the normal channels to enter the Mainland market, the customs cell phone. The so-called parallel imports (European version of the original) this cell phone is actually sold to other countries or regions should be a machine, after the evasion of customs duties to enter the domestic market for sales of cell phones. Parallel and licensed there is no difference in the hardware, but sales areas, software, and the model, because of the huge difference between the sales price, many people prefer parallel (European version of the original) cell phone. Licensed in Hong Kong: Hong Kong's mainstream market for cell phones in Hong Kong in Hong Kong, these products are regular local sales methods and sales channels. Because it is factory produced, so do not worry about the hardware, and in the basic operation and function is the same and the national mainstream. It has the removablecell phone jammerantenna of high gain.
However, the mainland and Hong Kong there are differences in tariffs, with manufacturers in mainland China and Hong Kong's pricing is also different, even the regular sales of cell phones in Hong Kong, mainland China with the same type of cell phone has great between price difference. Some cell phone vendors or through such means as the original products sold in Hong Kong should be transferred to the mainland sales, smuggled back to the mainland from Hong Kong, so Hong Kong's mainstream cell phone store and the back should have a label in Hong Kong mobile operator . Flight mode is turned off telecell phone communications, send text messages that can not receive calls, no signal contact with the base station, do not attempt to contact the base station. The cell phone jammer blocker should be plugged into the car’s lighter socket after starting the engine.
Because cell phone signals can interfere with aircraft electronic equipment, so the plane does not allow to open the cell phone, but this mode off the cell phone function of the signal on the cell phone can continue to use other features driving, such as viewing the cell phone book and enjoy the cell phone articles, films and so on. So called flight mode. Most of the cell phone battery is consumed in the signal, flight mode, turn off the signal, is power. Wireless Local Area Network WLAN is the abbreviation for wireless communication technology computer equipment will be connected together to form can communicate with each other and sharing resources of a network system. The nature of the wireless LAN feature is no longer used computer and network communication cable connected, but connected by wireless, so that the network build and more flexible mobile terminal. The package type ofcell phone jammeris paper box.
China Mobile WLAN using 802.11b standard, providing 11Mbps rate, than the fixed dial-up (56K) high 200 times, you can browse the WWW, send and receive EMAIL, enjoy online movies, download files and the office. In the commercial during the trial, there is no limit on the uniqueness, that is the same username and password to allow access over the same time. Therefore, users can own relatives, friends to share an account and password, but pay attention to the custody of the password to prevent theft by others. WLAN and GPRS are China Mobile to provide wireless Internet access methods, the two together to form a China Mobile "with e-line" business, to provide users' network player, the world's heart, "the wireless Internet experience. cell phone jammer is designed to installed on the table or the ceiling.

The antenna mode of cell phone jammer is omnidirectional and four-channel

It is the use of high-frequency magnetic shield in the opposite direction under the effect of the eddy current magnetic field with the original cancel the interference of high frequency magnetic field weakened, because the shield grounded to achieve the electric field shielding. The thickness of the shield not too large, and the skin depth and structural strength is the major consideration. 2 calculate the shielding effectiveness of shielding effectiveness (SE) is defined as: the electromagnetic field in the same location without shielding of the electromagnetic field strength and increases the shield after the ratio of the electromagnetic field strength. Difference between former and latter strength forcell phone jammeris no less than 20 dB.Common decibels (dB) said. SE = A + R + B (1) where: A is the absorption loss; R for the reflection loss; B for the loss of multiple reflections. 2.1 electromagnetic wave reflection loss due to air resistance and electromagnetic shielding metal is different from the incident electromagnetic wave produces reflex. The wave impedance of air in different areas of the field source and the field is not the same, were calculated as follows. Magnetic field source in the near-field reflection loss R (dB) for the formula: μr is the relative permeability; σr relative conductivity; f the wave frequency (Hz); D as the radiation source to shield distance (cm). It is the working directivity of cell phone jammer.Electric source in the near-field reflection loss R (dB) for the electromagnetic field source in the far-field reflection loss R (dB) for the R = 168-10log10 (μrf / σr) 2.2 absorption loss when the electromagnetic wave into the metal shielding of electromagnetic waves in shielded metal to spread, due to attenuation resulting from absorption. Absorption loss A (dB) to (4) where: d is the thickness of shielding material (mm). 2.3 multiple reflection loss of electromagnetic waves in the shielding layer multiple reflections between the loss of B (dB) for the formula: Zm is the electromagnetic impedance of the metal shield; Zw is the wave impedance of air. When A> 10dB, the general loss of multiple reflections can be neglected. 2.4 Calculation Example field shielding effectiveness of different source materials from the shield (thickness 0.254mm) 30cm away the shielding effectiveness (dB) results in Table 1. The antenna mode of cell phone jammer is omnidirectional and four-channel.Table 1 in the near-field and far-field cut-off point for the λ/2π, λ is the wavelength of the electromagnetic field. Field source from the shield of different materials (0.254mm) from the field sources in Table 1 shield of different materials (thickness 0.254mm) 30cm away copper-frequency shielding effectiveness dB / Hz magnetic shielding integrity of the near-field 3.1 is not complete if the shield , will lead to leakage of electromagnetic fields. In particular, electromagnetic shielding, which uses high-frequency magnetic shield in the opposite direction under the effect of the eddy current magnetic field with the original cancel high frequency magnetic field to weaken interference.The working power supply of cell phone jammer is AC 220V/3W. If the shield is not complete, the effect of reducing eddy current, which greatly reduced the effect of shielding. 3.2 The shielding effectiveness of shielding materials and electromagnetic shielding applications progress, to promote the continuous development of the form of shielding materials, and no longer limited to single-metal flat patterns, shielding effectiveness is also rising. Pay special attention to application of different shielding materials and shielding effectiveness of different applications. 3.2.1 Metal flat metal plate made of electronic equipment chassis, only durable, but also has electromagnetic shielding effect.

Cell phone jammer can be matched with any location in design

Distribution and Interior to set aside two UPS battery pack 4) two devices by 2 200KVA UPS configurations, flight. Device power 1) equipment cabinet within the room are equipped with dual power supply A, B dual power supply. 2) there is a single power supply in the equipment cabinet, as appropriate, configure the STS power module. Is approximately 20 units. 3) shield the indoor equipment cabinet in each column the first column header for the power rack cabinet. 4) A1, A2 for A power line first cabinet. B1, B2 for the B column headers cabinet power. C1, D1 is C, D Power column head cabinet. 5) Each are equipped with two industrial rack connectors, respectively, by two columns the first cabinet supply A, B (or C \ D) power supply. 6)The monthly electrical consumption of each cell phone jammeris lower than that of a fluorescent light. Each equipment rack cabinet equipped with two PDU wiring board 10 together with two industrial connector. 7) non-shielded room equipment, power distribution equipment power supply by the AP4, AP4 for the STS with dual power distribution cabinet. Distribution cabinet 1) technical requirements for power distribution cabinet a) rooms include nine power distribution cabinets and six columns head cabinet (with two 2 power distribution cabinet and 2 columns first cabinet). b) tender units to be under the power distribution cabinet and power distribution design detail column headers cabinets, cabinet sufficient spare switch. c) room cabinet power distribution cabinet and column headers use quality products made by manufacturers according to the regular standard production. cell phone jammercan be placed on the table, wall or ceiling.d) power distribution cabinet doors and column headers installed digital intelligent instrument. e) power distribution equipment and switch cabinet column headers to be of imported switches (such as Schneider, ABB, etc.). f) power distribution cabinet and column headers shall be incorporated into the line counter anti-import surge arrester (eg, OBO, etc.). g) column head cabinet as standard equipment rack cabinet (600 * 800 * 2000mm). 2) the appearance of power distribution cabinet requirements: a) appearance of the process, check: cabinet surface coating uniformity, no damage; lights, switches, measurement display device layout is reasonable. b) structural process: components arranged in a reasonable, neat; wire colors and reasonable cross-section, laying flat; connector firmly; inlet and outlet in line with project needs; c) signs, markers: should be flat clear.cell phone jammer can be matched with any location in design. d) shall comply with IEC standards for electrical performance air distribution 1) shielded precision air-conditioned indoor air from the shielded room power distribution cabinet. 2) non-shielded non-shielded room VRV air conditioning room air distribution equipment power supply. 3) Air-conditioning and lighting distribution panel master switch shall be linked with the fire, when the fire alarm action, the power cut off air conditioning, lighting, power supplies (start the emergency lighting), so in a timely manner to eliminate the disaster. Room lighting 1) According to the room design specification, the average room illumination should be greater than or equal to 500Lx. 2) room lighting use 1200 * 600MM for 3 * 40W fluorescent lamps, the light switch shunt control. 3) The room shall be within a certain interval install emergency lighting. cell phone jammer is unnecessary for specific management and maintenance.Emergency lighting illumination ≥ 50LX. 4) All rooms are required to install security lights at the exit. Repair the wall socket 1) installed on the room wall socket 250V/10A service five-hole (from the floor 0.3 meters), distance of 5-8 meters apart. 2) by the corresponding power distribution cabinet lighting, air-conditioning supply. Bridge bridge into a strong distribution power distribution backbone network backbone bridge and bridge.

Cell phone jammer has low environmental requirements

Are installed under the floor. 1) strong electric trunk tray selection 400 * 200mm galvanized tray. Bottom height of 0.3 m from the ground. 2) strong electrical tributary bridge use 100 * 100mm galvanized tray in the cabinet. Bottom height of 0.3 m from the ground. 3) building a network bridge selected 300 * 100mm galvanized bridge from the ceiling into the room hosts a dedicated channel. 4) backbone network bridge host room selection 500 * 100mm galvanized tray. Bottom height of 0.4 m from the ground. 5) branch network bridge host room selection 300 * 100mm galvanized tray.cell phone jammer has high reliability and good anti-collision performance. Bottom height of 0.4 m from the ground. 6) bridge outside the frame selected 200 * 100mm galvanized bridge outside the wiring from the ceiling into the room. 7) the strength of electrical bridge installation to avoid mutual interference. Distribution cable 1) room all made high-quality power distribution cables are used ZR-YJV flame retardant power cable. See materials list. Branch pipe from the bridge leads to wear protection. 2) room in the power distribution trunk cables are laid inside the tray. Grounding System 1) separate shield ground. 2) other types of grounding a common grounding. Room floor installation 40 * 4MM ground copper busbar, copper busbar and ground power distribution cabinet composed of rows of rooms equipotential ground bus.cell phone jammer has the complete machine shape.  The engine room of a variety of ground, such as security, the anti-static grounding and equipment enclosures, cabinets cabinet, metal components are all connected to the grounding wire equipotential ground bus. 3) room floor bracket 16MM composed of braided copper grounding grid spacing 1800 * 1800MM. 4) Each equipment cabinet leads to two 16MM woven copper, received equipotential ground bus. 5) The engine room of the ground wire or ground terminal provided by the building construction, requiring the building grounding resistance of grounding device is less than 1 ohm.cell phone jammer has low environmental requirements. Room distribution system construction phases 1) a power distribution system includes 2 UPS, 7 个 power distribution cabinets, counters and the first four columns corresponding distribution cables, power distribution equipment rack 60 slip, non-shielded room distribution, three precision air conditioning and power distribution cables VRV air conditioning, room lighting, power distribution systems, computer room grounding systems. 2) two power distribution system includes 2 UPS, 2 power distribution cabinets, two column headers and the corresponding distribution cables cabinet, equipment rack power distribution branch 30, 2 precision air-conditioning power distribution cables. 3) first and second content distribution system according to the project construction and site conditions determine the total demand.cell phone jammercan work for a long time in various conditions. Fifth, room layout: room layout: 1) required for each server rack server access switch cabinets for each of the laying of 10 six shielded cable, and configure the corresponding wiring devices, including six types of shielded twisted pair, TJ45 with stand, six shielded jumper, jumper Gigabit fiber. 2) optical storage system wiring. See BOQ. Six room environment monitoring system: room environment monitoring system: environmental monitoring system features 1) Power supply monitoring of room: The main room is the center of all the uninterruptible power supply (UPS) monitoring and management, real-time monitoring of operating data and power state, such as three-phase input voltage, current, power, the phase output voltage, current, power and other data, to support a variety of ways, such as abnormal color images, text and sound light, send text messages and other alerts.

The intelligent system of cell phone jammer is the information safety and protection product

Require that when the KVM centralized management system maintenance or failure, stand-alone digital KVM switch provides full-featured stand-alone access to independent operation, with full management capabilities, such as providing logs, virtual media functionality, security management, third party certification, SNMP, SYSLOG, etc.
Dedicated air conditioning system monitoring: all the precision of the center air-conditioned room to monitor real-time monitoring of the air conditioners of various operating parameters, return air temperature, return air humidity, wind turbine , cooling, humidification, dehumidification, compressor status, compressor alarm, fault and other data humidification control, remote control and support the authorization parameter adjustment, remote control and management.Response time of switching on or off is short for cell phone jammer. (One three-precision air-conditioning, two 2 precision air-conditioning) 3) distribution system into the main branch line and the system: counter-phase line voltage and line voltage phase, three-phase current, frequency, power factor, electrical degree . Install back on the road in the important acquisition module to achieve accurate measurements, the main switch status detection, phase loss, overvoltage, undervoltage, power failure alarm, and notify staff. (A 9 sets out the first four power distribution cabinet cabinet, two power distribution cabinet 2 sets of 2 columns first cabinet) 4) air-conditioning leak detection system: the computer room floor because there are a large number of signal and power cables, so the room To ensure absolute security in the event of water leakage should be reported immediately, and positioning.Intelligent management system product of cell phone jammer manufactured by the company would definitely be your best choice. System considering wire leak detection system. Range of precision air conditioning units) (55) temperature and humidity detection system: protocol digital signal output, external power supply 24VDC, can detect the range -10-60 ℃, the error range of +0.1 ℃. (Shielded room) room power requirements of the construction environmental monitoring system The main device is a collector and field sensors. Construction requirements: 1) the system has good man-machine user interface, easy to operate, easy to use. 2) acquisition system via TCP / IP networking methods, using the B / S structure of the software means that any computer within the network can view and manipulate dynamic environment monitoring system. The intelligent system of cell phone jammer is the information safety and protection product.Management system: seven room KVM management system: the device type equipment needs 10.1 digital KVM switch server interface modules specific description of 4 remote users, 1 local user concurrency management 32 servers using the USB interface, supports Keep Alive interface and can support virtual media features 16 single serial device management device, dual power, dual network interface, support for Modem interface with embedded pure hardware design, dual mirrored hard drives, dual LAN design serial number 4128 digital control system, centralized authentication switch pull type KVM -one remote management terminal 111 end hosts +19 5 10.2-inch display technical requirements 10.2.1 digital KVM switch targets key management capability from the management channel management interface to connect a single device to meet the requirements of ≥ 32 servers access a single device support ≥ 4 ≥ 1 local user and remote user support for concurrent access to USB; PS / 2; SUN interfaces such as digital KVM switch to the managed server supports 45 meters to provide the connection from the USB; The intelligent system of cell phone jammer is of the completely independent intellectual property.PS / 2; SUN, interface modules, part of the USB interface module required to support virtual media feature the highest resolution supported: normal screen: 1600 * 1200 resolution wide-screen display: 1680 * 1050 HD: 1920 * 1080 resolution in a different switch between servers, automatically adjust the video size, interface module index entries without manually adjusted.

The hole at the bottom of installation box of cell phone jammer

The installation box of  cell phone jammer  is with shutter-type ventilation positions at two sides.
The method can be used to determine the point of failure in the battery or in part of the circuit. The specific method is: first battery is fully charged, then the batteries on a false load power supply current is controlled at about 300mA, time for about 5 minutes. If the battery is normal, then the terminal voltage should not drop. More rigorous methods to measure the capacity of the battery, but more time-consuming. Note: According to the nominal voltage of the battery, the dummy load is available 3V, 4.5V, 6V bulb or external series resistance of a power. Measurement line connected to the battery reed only by mechanical crimping and not welded, so as not to damage the battery or accident. The law is a kind of emergency in the home appliance repair. The hole at the bottom of installation box of  cell phone jammer  can prevent from water accumulation.
Its precondition is not a major impact on the whole electrical indicators, and not endanger the safety of equipment (such as: switching power supply jumpers maintenance). For the maintenance of mobile phones, available thin high strength enameled wire (Φ0.1) jumper 0Ω resistor or a unit, with the 100pF capacitor connected across RF or IFSAW filter. Most GSM mobile phone with a certain degree of self-test and fault diagnosis function, which is helpful for rapid fault location to a particular unit. In using the law to require that the phone starts up normally, but the maintenance must also know how to enter the diagnostic mode. The latter requirement needs related to mobile phone repair service at hand.  cell phone jammer  will adopt outdoor installation.
Overview of products and companies. August 16, 2011, millet phone was officially released, domestic media for the first time come into contact with this so-called "China's mobile phone enthusiasts to create" smart phones. Dual-core 1.5GHz, 1GB of RAM, 4GB ROM, 1930mAh lithium battery, the Android 2.3.5 system and engineering Commemorative Edition 1699 yuan, 1999 yuan, the retail version, these parameters again and again to refresh the existing smart phone hardware standards, but also the day of conference time to a climax. The millet mobile phone the most attention is the hardware configuration and price, the phone again to refresh our minds of the hardware the height of the domestic and even world's most powerful dual-core Android phone, millet. The lightning protection measure of  cell phone jammer  is actually adding the lightning rod to  cell phone jammer .
Millet phones using the Qualcomm MSM8260 1.5GHz dual-core processor, similar to the HTC G14, the CPU, but a higher frequency. Terms of memory with 1GB RAM and 4GB of ROM, and fully meet the needs of the application. The screen used in Sharp's 4-inch screen, the material is estimated ASV, a 16:9 854x480 resolution, namely FWVGA. This screen uses a transflective reflector structure, sunlight can also be clearly seen. The camera is 8 million pixels. Millet (full name of Beijing millet limited liability company) set up by former Google, Microsoft, Jinshan, the company's top players, is a company focused on the new generation of iPhone, Android and other smartphone software development and hot mobile Internet business operations. The lightning rod has to be used for  cell phone jammer .

The interference from the strong electricity of cell phone jammer is low

Lack of professional media practitioners. Mobile media, integrated media, it combines the characteristics of the newspapers, radio, television, Internet and other media, covering text, audio, video and other aspects, in many areas of content for mobile media practitioners. Mobile media business has just started, are often makeshift staff, lack of in-depth knowledge and operating experience of the mobile media, while less comprehensive media practitioners increase the difficulty for the mobile media really play the media. Should therefore be established as soon as possible to improve mobile media's editorial systems and operations management system. Supporting services of the mobile advertising industry should be solved. To make sure  cell phone jammer  can be at the most suitable height.
It is said that the mobile media advertising industry is a much more fat than the SMS fat. In fact, the operators do not open mobile media advertising industry, commerce, taxation and other departments in charge of supervision and vocational training because of traditional media advertising business through the centuries to hone its business, but as a fledgling mobile media The advertising business is far less than such ancillary services, operators prefer to bear the economic losses, do not want to take policy risks to business mobile media advertising. Soft advertising and pornography. Many of the soft advertising (mostly spam) on the mobile media, long-term this continues, it will destroy the originally SMS news as the strengths of the mobile media. The interference from the strong electricity of  cell phone jammer  is low.
If spam can bury the phone, then pornography is also the natural enemies of the mobile media. Pornography on the inspectors mobile media, mobile media and advertising business there is no means of supporting, some operators in order to compete, pornographic pictures sent to the mobile media and mobile media to engage in gambling is not uncommon. Mobile phone media management strategies. Emerging information and communication, economic mobile communication, interaction and convenience, are popular, but to make it sustainable and healthy development, we must rectify the existing thorny issues and dissemination of environment. For example, have long been popular in South Korea, Japan and many European countries, SMS cell phone text messages. It is concerning the position selection of  cell phone jammer .
Also encountered in the development of its SMS fake SMS, SMS yellow flood, but each country has developed a number of countermeasures to control adverse SMS according to their own national conditions, and has achieved good results. Reference to the experience of foreign poor governance SMS from the mobile phone media features, I believe that attention to proceed with the problems in the governance phone communication from the following aspects. Strengthen the laws and regulations of the mobile communication. Importance of the development of mobile media, government departments can not be ignored, it is not only a mobile media manager, should be the facilitator of the development of mobile media. Government departments have the responsibility to purify the mobile communication environment. But sometimes, the installation environment of   cell phone jammers will limit the position selection.

The powerful work of cell phone jammers can be guaranteed

In fact, which integrates a very large number of components. The most simple chips at least one Modem function, a CPU to control the Modem function, In addition to this basic function, as well as graphics processing, GPS, wifi, power management, multimedia, and so on. The highly integrated single-chip is very important. Yan Chen Wei said that the mobile phones of all aspects of processing capacity than the original raise a lot in this case, if you still use separate chips instead of integrated single-chip, will bring a lot of problems: First, the cost of the chip more packaging costs, testing costs, including license, definitely better than the single-chip cost is higher; two power problem; research and development costs. The method is about the mounting of cell phone jammer .
This is a very real problem in terms of the OEM, if not single-chip, the impact between the various chips will make the investment in R & D costs a lot more than the single-chip R & D costs. Liu Guangjun more detailed analysis of the advantages of single-chip solution. He said that the first compared with the traditional smart phone, single-chip smart phone programs the number of main chip to reduce from seven to four, the hardware architecture greatly simplifies the whole cost of about $ 15 or more; to reduce the additional application processing chip and PCB area is reduced by 30%, smartphone lighter, thinner; again, the program of single-chip smart phone overall BOM to reduce the 140 devices, the overall BOM declined about 26%. cell phone jammer  itself should be observed.
Fourth, power consumption, a significant reduction in overall power consumption of single-chip smartphone fell 40 percent or more, especially in multimedia services, reducing power consumption to about 150mA, to overcome the defects of the current smartphone power; Simplifying the Business and service model, a one-stop program of communications chip provider of chip suppliers to reduce the number of business meetings, reduce the cost of after-sales service to focus more unified; Sixth, to simplify the hardware and software design, unified complete preset protocol stack and operating system design more simplified and traditional smart phone program, the baseband chip and AP chip separation, the complexity of the overall hardware design, protocol stack software, and application layer operating system separate R & D, Modem and AP interaction potential technical risks. It is to ensure as good enough shielding effect of cell phone jammer as possible.
Seventh, the overall program, the complete system pre-verification and turnkey delivery, reduced potential system problems, shorten product development cycle. At present, regardless of chip predators Qualcomm Core Technology Alliance, or MediaTek, Marvell, and other chip makers are pushing for single-chip smart phone solutions. Intelligent flood struck the terminal chip faces many challenges presented more challenges with the development of smart phones to the mass market, the smart phone chip. In this regard, Liu Guangjun specifically addressed. "Traditional smart phones, more than two processors, applications and communications are separate, but today's smart phones has been a trend in applications and the Modem a single chip. Then the powerful work of    cell phone jammers can be guaranteed.

The main function of equipment of cell phone jammers.

Application requirements of the industry is not price, but there is no solution, ability to solve real problems. It is because of the huge difference between business applications and personal applications, can be expected that the future will not have a PDA products to meet the needs of these two, PDAs toward two different directions is an inevitable choice. The CNET China laboratory testing PDA belong to the current market leader, they can learn the current trends in the PDA development. The Acer n30 n30 uses a high performance and lower energy consumption, Samsung S3C2410 266 MHz processor with 64 MB of ROM (actually available 55 MB), 32 MB of RAM. The emission power of cell phone jammer  is 30±3dbm.
The operating system is Windows Mobile 2003 for Pocket PC Premium, Bluetooth, infrared transmission port. Such a configuration is compared with the current highest performance Pocket PC there is a gap, but in testing and actual use of point of view, n30 choose such a configuration is quite pragmatic, it can easily cope with the mainstream of business and personal applications. Good operability of this product, through the four shortcut buttons of the front fuselage and the fuselage side of the wheel, users can easily manipulate and PIM functions, but due to the lack of navigation keys, n30 in to run some games The software may not be convenient. n30 comes with a travel charger. Power supply adapter of  cell phone jammer  is input AC100-240V 50/60Hz.
And the machine itself supports USB charging users a variety of sources of electricity supply. Finally, it is worth mentioning that the n30 with USB Host function, double-headed by the supplied data cable, users can flash drive directly connected to the Pocket PC (can also support other USB devices, but shall be fitted with driver). N30 using the Samsung processor with dynamic frequency adjustment function itself power control and reasonable, and high-capacity 1000 mAh lithium-ion battery. N30's battery life is still 4 hours (maximum brightness, medium-load mode), which means that in the normal mode. In all, this type of  cell phone jammer  is widely applicable.
Can be used continuously for nearly five days without having to charge the machine. N30's performance is far from strong, but a range of features Bluetooth, USB Host is not difficult to see the economic and practical design ideas throughout the n30's overall design concept. If your near future, the idea to buy a low-cost handheld computer we recommend the Acer n30. PalmOne, Tungsten T5 Tungsten T5 is the first Pocket PC with 256 MB of ROM, Flash ROM to replace the traditional RAM and integrated for the first time, due to Flash ROM even if the power-down will not lose data, so its been given a mobile storage function - built-in software user can choose whether to TT5 used as a flash drive. Using method of  cell phone jammer  has contained a lot of information.
In addition, in order to facilitate user management of large-capacity memory, TT5 for the first time launched the file management features, users can use the tree list files, so use more convenient. Using new the TT5 data line interface design, data cable and power cord are independent of each other, can you go in the power cable, data cable choose one TT5 with USB port charging capabilities and support infrared synchronization. It is also worth mentioning that through the new interface, TT5 with the related base video, and audio output function, the purchase of related accessories, TT5 can provide you with a video presentation platform. The Tungsten T5 uses the Palm OS v5.4.5 operating system. It is the main function of equipment of   cell phone jammers.

The phone is an authentic communication tools

As a communication tool, mobile phone for a maximum of meaning and value of natural or used to call, and this is the most direct call quality, stability indicators naturally become the focus of attention of the people on the phone. The phone is a what? This seemingly simple question but it is now the fundamental problems of the mobile phone market, a proper understanding of the consumer for the answer to this question will help manufacturers for market certainty. Through this survey, we recognize that the phone is no longer a fashion weather vane, the vendor is no need to think hard and all the appearance of the phone; phone is an increasingly popular product, but the mobile phone consumer is gradually become more rational, "Only the price of" will lose the market. Where the tranquility is required so cell phone jammer   is used.
Today, the phone is an authentic communication tools; tomorrow, it will be the application terminal of the Internet age, so consumers must be more concerned about call quality, call the stability of quality indicators as well as text messaging, wireless Internet access function indicators. The phone survey was divided into two types of GSM and CDMA, and GSM class is divided into third gear 1500 - 3000 yuan and 3000 yuan, 1500 yuan. 5077 valid questionnaires and participating SMS processing, and finally selected a fine phone, and 4 star phone. The above selection results are a true test of the June Chongqing region mobile consumer behavior trends, once again demonstrated the Chongqing mobile phone market is gradually to become more rational.  cell phone jammer  can be used to keep the tranquility of the library.
Selected results from the point of view, despite the fine phones because consumers awarded the honor of their different preferences, but the common point is that they are all the major brands pushing the boutique as well as classic. Although the price is high or low, launched successively, but the classic charm has always been so that consumers can not resist, popular in the market for three years, Nokia 8250, winning more people to exclaim "classic" victory. 8 boutique mobile phone outside the well-known brands accounted for 7, 4 star phone full of well-known international brand, from the point of view of the specific score, score of 7 foreign brand quality cell phone in the quality of a generally higher of the foreign brand to victory the first place.  cell phone jammer   can keep the quiet study environment.
"Only the price of" failure in terms of price, to further verify the waveguide Q268, Motorola E365, Sony Ericsson T618 and Samsung V208 in the winner of the respective prices stalls are proving once again that the price is not all, each a boutique phones The interpretation of the rational pursuit of the consumers cost-effective. In appearance, the selection of the results fully reflect the inclusive characteristics of Chongqing mobile phone market, a fine phone, candy bar, flip each half, but their common feature is a simple, smooth, light and generous, are the same cost-effective products in the most simple form. In terms of functionality, the survey results to give full expression. It is also the same for the customer to utilize   cell phone jammers in the theater and cinema.

How to choose the suitable cell phone jammer?

Domestic mobile phone, and persevering. Now, the domestic mobile phone development journey experiencing the most difficult moment. Chinese mobile phone users has reached 400 million people, the overall capacity growth is leveling off. That is to say, one, the domestic mobile phone to break again, only to capture the market from competitors where. 2, the future consumption of mobile phones, a large part of double or multiple purchase those components, which purchases have not so emotional, the products really function improvement in technology is the key to competition in the market. Due to the lack of core competitiveness of mature markets, the domestic mobile phone, so before suffered such a predicament. History can not be changed, Bird, TCL, Amoi, Konka, are thoroughly domestic mobile phone. The customer can choose the suitable cell phone jammer .
It has been given such a name, made mobile phones on behalf of poor quality, poor service, but the domestic mobile phone and also left the glorious achievements of the 4-year comeback. In the vast Chinese market, some consumers have come to trust the domestic mobile phone. Therefore, we should not have to have this name of the domestic mobile phone to be ashamed of, domestic mobile phone has not got to that need the back were rebel ancestors in order to obtain a survival situation. Consumer rejection of domestic brands is temporary, domestic mobile phone brave insist, through the hard times, new brand identity will be formed soon, consumers will be also our domestic mobile phone brand is a rightful place. Since the people we have made mobile phones, the imprint of the domestic mobile phone we can not erase. The customer also can put forward some specific requirements of cell phone jammer .
Why can not we brave admit humbly accept the views of consumers, to improve it? Why a few years ago, consumers will choose us, and now will exclude it? Because many consumers are already using our products, but they are not satisfied. Is not satisfied with our service. Our problem, the problem is not foreign brands, not the market, but consumers are concerned about quality issues and service issues. Quality problems in need of technical support, we can not be a short time to upgrade, then we do our after-sales service. To plot live, buy a mobile phone, and now for mobile phone "is different from the strength of the service than mere advertising more to impress anyone.  cell phone jammer  should act on 3G cell phone signal.
Since people said we made mobile phones, since the domestic mobile phone is so subject to the attention of the outside world, why we do the opposite, do a bit of attention of things? Domestic mobile phone can not stand together we consumers are concerned about the quality of service issues to make a little effort? Practice has proved that only heard the lament, hard to enjoy the joy within the domestic mobile phone, to diversify, and multi-brand, international, escape is invalid, the rest of the way, only to adhere to. Adhered to: Who is the real domestic mobile phone. The information is about where they will use   cell phone jammers .

The mobile phone in the foreign brands

In particular, a variety of models, styles, software, ringtones, the appearance of a technology platform in order to achieve low-cost innovation. Maintain optimal cost in the price of operating the voice of the rapid and substantial, the initiative of the price cuts, to cater to the market price reduction, and combined with the new timely introduction, to ensure that channels and a reasonable profit margins, small run fast capital turnover, The lower stand-alone profits to achieve a high level of investment interest, completion of the primitive accumulation of capital of the mobile phone industry. Advocated a flat, clear channel construction, in order to achieve rapid distribution, and rapid response; beauty show in the world market, product show, the nanny show is popular, TCL's gem mobile phones and the new image of China's mobile phone. The antenna of cell phone jammer is of the specific performance and function.
Xiaxin fighter dancing phone, Bird mobile phone, and set up a sales force known as the Chinese mobile phone for the first network and the network. 6P integrated marketing of the product (Product), price (Price), channels (Place), promotion (Promotion), plus play the ethnic card of the public (Public), government support, power (Power) was won by the end of 2002 more than 30% market share. The past three years, the reasons for the decline of the domestic mobile phone. Since the second half of 2004, the domestic mobile phone in the foreign brands, pressing harder and harder, market share plummet, 2006 more appalling, the domestic mobile phone market share from the half of 2005, all the way below the 25%. cell phone jammer can be selected by the customer.
Still lingering echo, Bird, Amoi, TCL, Soutec, Yi America, Panda, and many other domestic giants collapsed after the big mobile phone business continued to huge losses. The overall decline of the domestic mobile phone is not accidental. The seemingly robust channel capacity of domestic manufacturers have the same cost disadvantage. Into their camp in order to attract dealers, domestic manufacturers generally give the dealer profit margins higher than double the foreign brands. At the same time, pull the team can not help but cohabitation, coupled with the "nanny" integrated management approach, the cost of domestic manufacturers in the channel management, channel risk and market inputs should be much higher than the foreign manufacturers. Today's strong domestic mobile phone manufacturers in the channel, in exchange for considerable cost. The antenna can be allocated to cell phone jammer .
This strength is also foreign manufacturers adjusted and further weakened. Domestic brands and multinational giants to compete is the actual competition of the research strengths of the manufacture and sale of advantages and multinational giants, old mobile phones can be described as high-tech products, a status symbol, is a pioneer in supplies, the decision of manufacturers to research capacity, the promotion of capacity on the The success or failure; Today the popularity of mobile phones, fashion, popularity of the achievements has the advantage of manufacturing capacity and ability to sell the advantage of Chinese local business success. In the game of this year, domestic brand mobile phones and foreign brands, the two will enter the cross away from the competition "stage, domestic brands will attempt to break the foreign brands blockade, foreign brands will do my best to adjust the channel and marketing disadvantage. Make   phone jammer have some other special performance and functions.

The parts and components of cell phone jammer

Maintain the cleaning of the circuit board is not operating, to prevent all of the solder, tin beads, wire material, conduction material off the people board, to avoid other aspects of the failure. Different manufacturers, different models, different styles, its version number, use the same version of a qualified normal chips, components, avoiding the replacement of different versions of the chip. To refrain from the use of substandard, piracy, smuggling chip components, so as to avoid the more complex failure. In this, the correct analysis of the circuit, correct an error of judgment. The right to find fault position is very important to avoid false positives. Pay attention to check the phone's menu settings are correct, the failure of many mobile phone menu is not set in the correct state. Normally, the technical group of  cell phone jammer will hold a meeting.
The repair is completed, the cleaning, sorting table is necessary. Maintenance tool for homing, re-fitted with all the attachments (long screw, antenna sets, rubber, insulator, etc.) to prevent the repair time less things. Maintenance staff to master the basic terminology and basic knowledge of mobile phone repair in order to determine the failure to produce the original back and the approximate range, to avoid one by one according to its principles of testing, or to find the point of failure in the entire circuit board. Troubleshooting steps. As a doctor to "look, smell, and asked", diagnosed the condition and the right medicine. Repair mobile phone failure, is also subject to ask, see, hear, touch, thought to repair the six stages. Only for the different models, different fault, use a different method of repair. These are parts and components of cell phone jammer .
As doctor visits, the first like users to understand some basic information. Such as the cause of the failure process and the reasons for the phone's useful life, and Condition of the situation. This inquiry should be further observation to pay attention and be thinking clues. A wide range of mobile phones, will inevitably encounter the previous exposure to a few new models or models of the market less, to see when combined with specific models. Mobile phone repair, look at the machine when the green LED status indicators blink when the call to allocate and display information. The combination of these observed phenomena to provide ideas for further diagnosis of failure. Preliminary judgment failure awaiting repair mobile phone voice quality, volume status, the sound is intermittent and other phenomenon. Normally, the high power  cell phone jammer  is not suitable for the shielding school.
For power amplifiers, transistors, integrated circuits and certain components. Touch can touch the level of surface temperature, such as hot, think of whether the current is too large or heavy load can be based on the experience of rough to determine the fault position. Namely analytical thinking. Previously observed, all the information collected, the use of maintenance experience, combined with a specific principle of the circuit, the use of necessary means of detection, carried out the analysis, thinking, judgment, and finally made the overhaul program. Has failed component replacement, welding. Discarded after the technical processing and then use the parts as far as possible to save costs. A unit of low power  phone jammer is enough for the shielding of a classroom.

The suitable and corresponding cell phone jammer

Post-sound chamber of sufficient size, the leakage hole away from the SPEAKER; post-sound chamber can improve the effect of sound frequencies in the low-frequency part of the basic frequency of the sound is the low frequency, after the sound chamber, then the sound will be very macro bright. Speaker around a lot of holes, such as sub-shell gap, the side key hole, try to design specialized sealed after the sound chamber. The spk amplitude of the sound chamber before and after the equal and opposite phase, and therefore can not be exchanged, it must be before and after the sound chamber to isolate. Otherwise, the two phase superimposed, the sound becomes very small. Note that space dust network, leaving a paste. SPK's alignment to avoid shell isobar. SPK in front of non-woven are thin and sparse quality to the sound will not be muffled.  cell phone jammer  really validly acts on isolating signals.
Proposed to use Mesh, do not use non-woven. Lead length is convenient for welding, using the diameter of 32 models, end stripping length 1.5mm. Whether there are appropriate foam as the gap between the buffer SPK and PCB. For shrapnel exposure SPK, the PCB pads and contact pads X / Y direction must be the center (contact pads must be designed as compression state) and unilateral greater than the contact pads above 0.5. The shrapnel must design the original and the compressed state of the latter two. Space, then try to bring their own sound chamber. Consider the ESD grounding and TVS tube; speaker connected with the outside world, ESD, it is easy to break into the speaker around the deck, power supplies, connectors, and other critical devices must also be synchronized to consider a good grounding. The customer should choose the suitable and corresponding cell phone jammer .
The handset must be the sound chamber foam, and before the sound chamber height must be more than 0.5mm (foam compression). Or audio loudness, however, and ESD is also greatly affected. Clamshell machine vocal style of the SPEAKER / REC one-sided, unilateral clearance of 0.2 REC and locating ring, outer locating ring is not sealed, otherwise SPEAKER on the back of the vent blocked, sound, unable to pay. Monomer receiver attention to compress, to prevent non-sealed lead to a small voice. The shrapnel must design the original and the compressed state of the latter two. Flip the receiver of the machine, close the phone, the sound hole can not and mic overlap, otherwise there will be significant in the lid whistle. The proposal to stagger distance> 6mm. The shrapnel receiver may top shell, resulting in LCM into the gray. Then,  cell phone jammer can effectively play a part.
Shrapnel can not be too hard. RVE before and after the amplitude of the sound chamber equal and opposite phase, and therefore can not be exchanged must isolate the front and rear sound chamber. Consider TVS pipe; receiver connected with the outside world, the ESD is very easy to break into the receiver around the connectors and other key devices also sync to consider the good ground. MIC into the size and location of the sound hole: the MIC aloud hole area ≥ 1.0 the square of millimeters, or the hole ≥ φ1.0 to prevent the whistle; a sound position to the underside of pronunciation, a sound position coplanar with the receiver more likely to lead to whistle.   phone jammer is really strong in blocking signals.

The valid blocking range of cell phone jammer .

When the reed switch is damaged, the phone there will be some very complex fault, as some or all of the key failures, power difficulties, does not display. Therefore boot difficulties in the maintenance of cell phone, keys out, does not display fault, not forget to check the reed switch. The role of the Hawk sensors and reed switches, the working principle is very similar in the magnetic field to produce the pass off. Hawk sensor is an electronic component, and its appearance package is very similar to the transistor, the pin arrangement shown in Figure 2-8. Its internal principles of the structure shown in Figure 2-9. By Hawke components, amplifier, Schmidt circuit and open-collector output transistor. The customer has to consider the valid blocking range of cell phone jammer .
When the magnetic field components Hawke generate a tiny voltage to the amplifier and the Schmitt circuit, the transistor turns on output low; when no magnetic field effect transistor cut-off, the output is high. Relative to the reed switch sensor Hawke longer life, difficult to damage. And vibration, acceleration insensitive. The role of faster switching time is generally 0.1 ~ 2ms, compared with dry reed pipe 1 ~ 3ms faster. Ericsson T28 mobile phone is the application of this switching of electronic components as a flip switch, and its working principle is shown in Figure 2-10. N600 V630 and V631 for the switch-type Hall sensor; figure for the power switch control tube, the conduction D600 output by the microprocessor HALL signal control.  cell phone jammer  should be maintained well like other electronic products.
Power from the battery voltage. When the flip is closed, the cover in the Field of Hawk sensor N600 Hawk sensor circuit of the transistor conduction from the sensor pin output low. During a call, they hang up signal sent to the microprocessor hang up. When opening the flip, the Hawk sensor is not sensitive to magnetic fields, Hawk sensor circuit transistor cut-off, the output level is high, if the signal is generated when the incoming call, transmission to the microprocessor, the CPU answer the call as the signal of the hook; single flip open, the high signal from the microprocessor as a backlight control signal so that the background lights up.  cell phone jammer  can be used to jam almost all signals.
HALL signal when the signal is high, the switch V630 and V631 Dentsu Hawk sensor provides power, if you open or close the fold, the the Hawke sensor will output switching signal to control the phone. When the phone is set only key response, micro-processing along the D600 output HALL-level signal is low, so that the switch V630 and V631 deadline, the Hawke sensor power supply, with or without magnetic field output the voltage does not change, loss of the switch. Electro-acoustic and electric components. Electro-acoustic device to convert electrical signals to sound signals or sound signals into electrical signal device. Including the speaker, ringer, headset, mouthpiece, etc.. Some other wireless signals are blocked by  phone jammer.

As cell phone jammer moves

Can be said that the special choice of shell material achievements of the success of the V3. Addition, individual user reaction when some of the ultra-thin slider phone, answer the phone can always feel the phone before the shell from side to side, this is the phone structural design problems, due to the shell of the phone is too thin. speaker vibration when a call is easy to let the phone's body to produce resonance. HW (Hardware) hardware design. Hardware design circuit and antenna, while the HW and MD to maintain regular communication. Such as the MD thin, so the circuit is also thin and only work. HW will be required to the area of the MD place the antenna is relatively large, and the distance of the battery should be far enough.  cell phone jammer  is to determine and shield some other wireless signals.
HW will also require the ID should not be placed near the antenna metal parts. One can imagine a built-in antenna design mobile phone, its manufacturing cost than the design of an external antenna on the phone to your 20-25%, the main factors is the antenna design, material requirements and circuit design and The manufacturing costs are higher on average some. Usually the architect (MD) and the Industrial Designers (ID) will be controversial, MD said ID is a painter, painting some of the things we usually do not, the ID would say MD is stupid, do not do according to their design, the mobile phone not sell well. Therefore, a new mobile phone in hands-on design, each department will design creativity of the ID department review. As cell phone jammer moves, different objects will be in the acting range of the signal detector.
A creative ID that can be achieved, and the customer experience you want to feel very good job. Then the ID of the Motorola V70 is a good creative example of the late reaction of the market, while Siemens Xelibri creative good can be achieved, but unfortunately the use of the end customer does not feel good, so a really good idea, should not only look good, can be realized, but also easy to use. Quarrel with another HW also with ID, ID, like decorated with metal, but metal will affect the design of the antenna as well as prone to static electricity problems, so HW will be very angry, and ID / MD will develop new materials, in order to meet the requirements of the ID. The mini portable cell phone jammer is enough for their signal detection use.
The Nokia 8800 is a good example of the sense of both the metal and do not affect the antenna reception. SW (Software) software design. Relatively speaking, SW is easier for everyone to understand, due to the popularity of the computer, allow us to maximize the contact with a variety of software, the mode of the mobile phone user interface, we often see the menu of phone nine official grid operation implementation, these are the areas of SW design. SW To fully take into account the operability of the interface, you have a humane, whether aesthetic factors. SW test is very complex and numerous, SW test is not just looking for the bug, compliance testing, compatibility testing is a very important project.  phone jammer is through detecting and inspecting the cell phone signal emitted by the cell phone.