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.