Thursday, May 31, 2012
Here is the product application of china cell phone jammer
Called the 3GPP 3G Partnership, Protect the Chinese translation for the Third Generation Partnership Project, 3GPP video is a multimedia standard, support for MPEG-4 and H.263 video coding agreement with ACC Advanced Audio Coding and AMR Adaptive Multi-Rate audio standards. See here may be feeling very strenuous. It does not matter, this is just a definition of it. 3GPP video that we usually see the use of H.263, the AMR NB coding protocol, it can provide 30 frames / sec in the low rate of 128KB / S smooth screen, the cell phone can be online on-demand. The cell phone jammer has stable quality and performance with repair rate not more than 2%.
In terms of the current situation applies to cell phones with small memory capacity, 3GPP video format is very easy to send MMS MMS, most of the support for video recording cell phone supports video playback in 3GPP format. In 1998, the founding of the United Nations International Organization for Standardization ISO and the International Electrotechnical Commission IEC MPEG encoding standard. Stands for Moving Pictures Experts Group Chinese translation of the Moving Picture Experts Group. They developed three versions of MPEG, respectively, MPEG1 the MPEG2 MPEG3 which MPEG3 our daily often have access to all of us are familiar with is the MP3. Subsequently the organization to develop the two new image compression standard is as MPEG4 MPEG7. One of working frequency of common cell phone jammer in the market is 869~894MHz.
MPEG4 is a compression standard for ultra low bit-rate moving images and language. His advantage. MPEG4 compression ratio high, the low bit rate transmission of video. Small compared to MPEG1 the MPEG2 MPEG4 encoder optimized image files, a higher compression ratio, better clarity. Can reach up to 768 * 576 definition, this definition has been close to the DVD picture. We may in this regard is not too concerned about, then talk about the application. MPEG4 compression algorithm Divx video coding technology to the 120-minute movie can be compressed 600MB, you can also compress a DVD to two CD-ROM, so that we do not have to use the DVD device to enjoy DVD-quality images . For the application of mobile video, MPEG4 smaller bandwidth for video transmission. 1900~1990MHz is also contained in the working frequency of cell phone jammer .
The cell phone's hardware can not be compared with the computer, so MPEG4 on the cell phone does not like on a computer so powerful. Many camera cell phones can capture low-resolution MPEG4 video, the same, and now most of the cell phones support download and play MPEG4 video. RM famous Real Networks Inc. to develop audio and video compression specification. RM format all known as Real Media. It contains the file format of the audio stream real audio and video streaming file format real video file. He is a compression format developed by Real Networks Inc., a major for the online real-time transmission of video and audio information in the low rate. The DC-DC converter input voltage is used for cell phone jammer.
The smartcell phone can install real player to support to play RM video on our 7710 with. . Nokia is generally the software bundled on the cell phone does not need our own independent installation. Some members reflect the REAL version of our own backwardness want to upgrade but there is no way to upgrade. The mobile version of the real single function on a computer that can play RM format can not be used in cell phones. REAL cell phone more stringent requirements of the RM file encoding rate, which is how some members say find a film on the cell phone but can not play, play out of a sound image, and so on. Because of this. Here is the product application of china cell phone jammer.
Cell phone jammer adopts imported automatic surface mount system
CMOS, fully known as Complementary Metal Oxicel Semiconductor Chinese translation of the complementary metal oxide semiconductor, is a sensor light circuit, the CMOS is no difference in the manufacturing technology and computer chips, in microprocessors, flash memory and a particular purpose integrated circuits semiconductor technology plays an absolutely vital role. More technical terms, we do not Yune. CMOS is the use made by these two elements in silicon and germanium semiconductor transistor CMOS is negatively charged and positively charged basic functions. Physical knowledge. cell phone jammer will automatically run after collectively installing antenna and switching on the power.
This current can be generated by two complementary effects processing chip, record and interpreted as images. CMOS camera and more used in the low-end cameras and camera cell phones, CMOS sensors are highly integrated, the distance between the photoelectric sensing element and the circuit close to the optical, electrical and magnetic interference between the image quality impact. Here is the key, oh. CMOS imaging results are not ideal, but it is not absolute, everything is relative. The absolute thing does not exist. . . . Philosophy again. Some high-end digital SLR cameras are using CMOS lens, the imaging results are not poor. Passing rate of cell phone jammer quality can keep above 99.37% for a long time.
Our 7710 cell phone is to use a CMOS camera, compared to other professional camera cell phones can be less, but we use every day is enough, unfortunately he does not support full-screen viewfinder and only 2 times digital zoom. In addition, Nokia camera cell phones n90 lens also uses a CMOS sensor, but his excellent photographic effect is because he is the first Carl Zeiss optics communications products, and he is Nokia's first megapixel auto focus cell phone . So the effects of good or bad can not simply look at the lens material to determine. cell phone jammer has the ultra-long-time continuous working.
CCD called the Charged Coupled Device Chinese translated into the electronic coupling components. He is on a digital camera sensor light imaging component. His system, just like a traditional camera film circuit of the induction of light position. He will affect the final photo imaging. His works is very simple, the key to the oh. . . . Anything the most important principle. He is composed by a large number of independent of the photosensitive element, and when we pressed the shutter, the light passing through the lens exposure on the photosensitive elements arranged in accordance with the matrix, the light was turned into the charge. The amount of charge on each component depends on the light intensity, this is our traditional camera like it suffered. Sparking of china cell phone jammer when starting can be effectively avoided.
Then, each component in turn information to the converter, analog signals through analog converter into a digital signal, digital signal is compressed to a certain format into the cache, this time, a digital photo, was born. Simple, we can imaging principle clearly and logically. Since 2001 the first 256-color color cell phones Ericsson t68 since the advent of color cell phones in a short period of four years is almost accounted for the lion's share of the cell phone market, play a video file additional features for color cell phones are popular, However, different cell phones support different video formats. Such as smart cell phones tend to support the RM WMV, AVI video, while the ordinary cell phone is more popular to play 3GPP MPEG4 format video. cell phone jammer adopts imported automatic surface mount system.
Monday, May 21, 2012
The factory should deliver cell phone jammer strictly in accordance
Now, with the growing popularity of cell phones, cell phone text messages (SMS) because of its convenience, low-cost and welcomed by people. Especially due to the GSM SMS service through the signaling channel transmission, no dial-up connection, the application of the weather system, GSM-based SMS service can be widely used in meteorological data, meteorological services, to provide weather information for decision making at all levels of leadership . GSM-based mobile messaging platform module with SIM card only, no need to negotiate with operators to replace the cumbersome short message line access, and is currently one of the most extensive communications program. Computers and cell phones are generally using asynchronous serial communication, communication rate of 19200B / S or more, just need to add user information to the appropriate destination address to send Short Message Service Center (SMSC) can, through the service center store and forward to the final letter of accommodation. The factory should deliver cell phone jammer strictly in accordance with the lead time of cell phone jammer.
GSM module through the serial port control provided by the AT command set GSM07.05 to achieve, as long as the computer through the serial port to the module can send and receive a series of AT commands to send and receive SMS GSM MODEM control purposes, the AT commands used in Table 1 below. Currently GSM module for SMS control There are three ways to achieve: Block Mode; based on AT commands Text Mode; based on AT command PDU (Protocol Data Unit, Protocol Data Unit) Mode. Block mode handset manufacturers need to provide driver support; send and receive text messages using Text mode, the code is simple, very easy to implement, send text directly on the line, sending non-ASCII content can also be made, but need cell phone support in order to properly display, which limits the Chinese SMS applications; and PDU mode SMS support not only in English, but also send text messages in Chinese, has become the de facto standard, briefly described below PDU mode. The factory should describe the lead time of china cell phone jammer in a clearer way.
Send and receive SMS PDU mode can use three kinds of coding :7-bit ,8-bit and UCS2. 7-bit encoding used to send normal ASCII characters ,8-bit encoding is used to send data messages, UCS2 encoding for Unicode characters sent. Chinese short messages to achieve the Chinese GB2312 encoding needs to be converted to the Unicode code page CP936 encoding, PDU data format mainly by the short message center address, byte header, message type, destination address, protocol identifier, data coding scheme, period, the length of user data and user data, with data about PDU format and details related to the AT command set, see ETSI GSM07.05 standards. The lead time of cell phone jammer is included in the instruction of cell phone jammer .
GSM module through the serial port control provided by the AT command set GSM07.05 to achieve, as long as the computer through the serial port to the module can send and receive a series of AT commands to send and receive SMS GSM MODEM control purposes, the AT commands used in Table 1 below. Currently GSM module for SMS control There are three ways to achieve: Block Mode; based on AT commands Text Mode; based on AT command PDU (Protocol Data Unit, Protocol Data Unit) Mode. Block mode handset manufacturers need to provide driver support; send and receive text messages using Text mode, the code is simple, very easy to implement, send text directly on the line, sending non-ASCII content can also be made, but need cell phone support in order to properly display, which limits the Chinese SMS applications; and PDU mode SMS support not only in English, but also send text messages in Chinese, has become the de facto standard, briefly described below PDU mode. The factory should describe the lead time of china cell phone jammer in a clearer way.
Send and receive SMS PDU mode can use three kinds of coding :7-bit ,8-bit and UCS2. 7-bit encoding used to send normal ASCII characters ,8-bit encoding is used to send data messages, UCS2 encoding for Unicode characters sent. Chinese short messages to achieve the Chinese GB2312 encoding needs to be converted to the Unicode code page CP936 encoding, PDU data format mainly by the short message center address, byte header, message type, destination address, protocol identifier, data coding scheme, period, the length of user data and user data, with data about PDU format and details related to the AT command set, see ETSI GSM07.05 standards. The lead time of cell phone jammer is included in the instruction of cell phone jammer .
The purchase manager of cell phone jammer is working in the office
Purchase Management of cell phone jammer
Of course, send and receive E-Mail phone must be configured POP3, IMAP4 protocol from the server to receive e-mail, e-mail through the SMTP protocol to send out the mail server. The so-called "GPS", is English, "Global Positioning System" prefix abbreviation of three words. It consists of 24 artificial Earth satellite (ie, around six circular orbits the Earth on the average distribution of satellite navigation), GPS global positioning system can continuously provide users with real-time three-dimensional position information to measure the velocity of the user, and provide accurate timing service, and its positioning error is less than 10 meters, timing error is less than 0.1 seconds, timing accuracy of better than 0.000001 seconds, and its radio signal also has a certain anti-interference ability. The purchase manager of cell phone jammer is working in the office.
Java is by Sun Microsystems, the company developed the programming language itself is an object-oriented (Object-Oriented) programming language. JAVA is currently the most widely used in mobile phones is the JAVA games. Java also claims to be able to cross-platform language, this is mainly because Java itself is compiled, not directly produce executable code, but from an intermediate code called ByteCode, required in this code through the Java interpreter to interpret it, can really be executed, so long as the platform is equipped with a Java interpreter that can interpret ByteCode also be able to run Java programs compiled, so with the Java program is in that platform is compiled, it is not a dry system. Write Java programs can be divided into two categories, namely, Java Applet and the general Application, and Application of this type of program on the general role, such as C + + is more similar, is a stand-alone executable applications, such as HotJava is a browser, and is developed by using the Java program. The purchase manager of china cell phone jammer is on his way to Beijing.
The most common procedures, including Java applications and applets. Application is a separate program, such as the HotJava browser software is written in Java language. Applets similar applications, but they alone can not run, Applets in Java-enabled browser to run. Applet is mainly built on the HTML page, play a role in the browser. Java's goal is to meet a full variety of different kinds of machines, different operating system platform development software in network environments. Using the Java programming language, you can add a wide variety of dynamic web effects. You can put an animation, add sound, can also create interactive web pages. The purchase manager of cell phone jammer is about to go to Shanghai to purchase materials of cell phone jammer.
Of course, send and receive E-Mail phone must be configured POP3, IMAP4 protocol from the server to receive e-mail, e-mail through the SMTP protocol to send out the mail server. The so-called "GPS", is English, "Global Positioning System" prefix abbreviation of three words. It consists of 24 artificial Earth satellite (ie, around six circular orbits the Earth on the average distribution of satellite navigation), GPS global positioning system can continuously provide users with real-time three-dimensional position information to measure the velocity of the user, and provide accurate timing service, and its positioning error is less than 10 meters, timing error is less than 0.1 seconds, timing accuracy of better than 0.000001 seconds, and its radio signal also has a certain anti-interference ability. The purchase manager of cell phone jammer is working in the office.
Java is by Sun Microsystems, the company developed the programming language itself is an object-oriented (Object-Oriented) programming language. JAVA is currently the most widely used in mobile phones is the JAVA games. Java also claims to be able to cross-platform language, this is mainly because Java itself is compiled, not directly produce executable code, but from an intermediate code called ByteCode, required in this code through the Java interpreter to interpret it, can really be executed, so long as the platform is equipped with a Java interpreter that can interpret ByteCode also be able to run Java programs compiled, so with the Java program is in that platform is compiled, it is not a dry system. Write Java programs can be divided into two categories, namely, Java Applet and the general Application, and Application of this type of program on the general role, such as C + + is more similar, is a stand-alone executable applications, such as HotJava is a browser, and is developed by using the Java program. The purchase manager of china cell phone jammer is on his way to Beijing.
The most common procedures, including Java applications and applets. Application is a separate program, such as the HotJava browser software is written in Java language. Applets similar applications, but they alone can not run, Applets in Java-enabled browser to run. Applet is mainly built on the HTML page, play a role in the browser. Java's goal is to meet a full variety of different kinds of machines, different operating system platform development software in network environments. Using the Java programming language, you can add a wide variety of dynamic web effects. You can put an animation, add sound, can also create interactive web pages. The purchase manager of cell phone jammer is about to go to Shanghai to purchase materials of cell phone jammer.
The supply manager of cell phone jammer acts well
Supply Manager of cell phone jammer
Information on the network can be sent to mobile phones or other wireless communication terminals. It uses a HTML markup languages like WML (Wireless Markup Language is not a wireless markup language), the Internet equivalent of HTML (hypertext markup language) and can be accessed directly through the WAP Gateway website in general. Through WAP, you can use anytime, anywhere wireless communication terminal to obtain instant information on the Internet or the company's Web site, truly wireless Internet access. It is the combination of mobile communication and Internet the first stage of the product. The company plans to hire 2 more supply managers of cell phone jammer.
WAP can run on top of a variety of wireless networks such as GSM, GPRS, CDMA, etc. WML is Wireless Markup Language Notes (Wireless Makeup language) abbreviation. Support WAP-enabled handsets can browse Internet content described by the WML. This through WAP technology, the Internet can be a lot of information and introduced to a variety of business mobile phones, PALM and other wireless terminals being. No matter when, where, as long as necessary information, open the WAP mobile phone, users can enjoy the endless online information or online resources. Such as: comprehensive news, weather, stock market trends, business reports, the current exchange rate. E-commerce, online banking will also be one by one to achieve. Through WAP mobile phone users anytime, anywhere access to sports results, entertainment anecdotes, etc., to add interest to life, can also use the online booking function, the living arrangements of the orderly. The supply manager of cell phone jammer should well know performance of china cell phone jammer.
Which, WAE layer with micro-browsers, WML, WMLSCRIPT interpreter and more. WTLS layer of encryption for wireless e-commerce and wireless transmission of data to provide basic security functions. WAP services can be provided mainly related areas: information type: SMS-based information on-demand platform services, such as news, weather, discounts, news and other information. Communications categories: the use of telecommunications operators SMS platform to provide users with notifications such as E-MAIL, E-MAIL and other communications services. Business categories: mobile e-commerce services, including online transactions, payment applications such as shopping. Entertainment: Includes a variety of games, pictures and music ringtones downloads. Special services: such as advertising, location services. Business can be directed to send advertising messages to the user's phone. The supply manager of cell phone jammer acts well.
Information on the network can be sent to mobile phones or other wireless communication terminals. It uses a HTML markup languages like WML (Wireless Markup Language is not a wireless markup language), the Internet equivalent of HTML (hypertext markup language) and can be accessed directly through the WAP Gateway website in general. Through WAP, you can use anytime, anywhere wireless communication terminal to obtain instant information on the Internet or the company's Web site, truly wireless Internet access. It is the combination of mobile communication and Internet the first stage of the product. The company plans to hire 2 more supply managers of cell phone jammer.
WAP can run on top of a variety of wireless networks such as GSM, GPRS, CDMA, etc. WML is Wireless Markup Language Notes (Wireless Makeup language) abbreviation. Support WAP-enabled handsets can browse Internet content described by the WML. This through WAP technology, the Internet can be a lot of information and introduced to a variety of business mobile phones, PALM and other wireless terminals being. No matter when, where, as long as necessary information, open the WAP mobile phone, users can enjoy the endless online information or online resources. Such as: comprehensive news, weather, stock market trends, business reports, the current exchange rate. E-commerce, online banking will also be one by one to achieve. Through WAP mobile phone users anytime, anywhere access to sports results, entertainment anecdotes, etc., to add interest to life, can also use the online booking function, the living arrangements of the orderly. The supply manager of cell phone jammer should well know performance of china cell phone jammer.
Which, WAE layer with micro-browsers, WML, WMLSCRIPT interpreter and more. WTLS layer of encryption for wireless e-commerce and wireless transmission of data to provide basic security functions. WAP services can be provided mainly related areas: information type: SMS-based information on-demand platform services, such as news, weather, discounts, news and other information. Communications categories: the use of telecommunications operators SMS platform to provide users with notifications such as E-MAIL, E-MAIL and other communications services. Business categories: mobile e-commerce services, including online transactions, payment applications such as shopping. Entertainment: Includes a variety of games, pictures and music ringtones downloads. Special services: such as advertising, location services. Business can be directed to send advertising messages to the user's phone. The supply manager of cell phone jammer acts well.
The purchase of china cell phone jammer has the strict management requirements
Purchase Manager of cell phone jammer
The openness of Java technology, security and the society has a huge resource, and its cross-platform, that is "write once, run anywhere" feature makes Java technology a smartphone software platform, the de facto standard. Using Java technology, the preparation of applications and services that people who do not care about receiving their phone service is used by the operating system and chips, just follow the requirements to write Java programs like; Similarly, the production of cell phone manufacturers do not have to concerns in the future who will provide value-added services. It can be seen, the use of Java technology, you can create a complete, cost-effective wireless data value-added services chain so as to provide flexible, personalized content and form a variety of services. The purchase of china cell phone jammer has the strict management requirements.
Java Mobile Development Status: in June this year, already has about 100 million Java phones in use, excluding China 53 mobile operators launched a Java technology-based wireless data value-added services. China Mobile has established a system of wireless Java value-added services, and launched a "treasure chest" and other services brands, including games treasure chest, treasure chest entertainment, business treasure chest, treasure chest of life, etc., have been on July 10, 2003 started the official business. China Unicom is also built on its CDMA 1X wireless Java value-added network service system, the current system is the construction process, and September 26, 2003 China Unicom, Beijing Zhenrong factoring in the Great Hall and Sun Microsystems announced the establishment of co-sponsored "UniJa technology alliance", the three parties will be Unicom's CDMA 1X network in the Java value-added services and comprehensive cooperation. The purchase of cell phone jammer is the important link of manufacturing cell phone jammer.
Infrared interface is the standard configuration of a new generation of mobile phones, it supports the phone and computer and other digital equipment for data exchange. Infrared communication has a low-cost, easy connection, easy to use and compact structure, so in small mobile devices access to a wide range of applications. Via infrared interface, various types of mobile devices can freely exchange data. Infrared is the wavelength of electromagnetic waves between 750nm to 1mm, which is higher than microwaves but lower than the frequency of visible light, is a human eye can not see the light. As the shorter infrared wavelengths, the diffraction barrier ability is poor, so more suitable for applications that require short-range wireless communications applications, for point to point data transmission line. Infrared Data Association (IRDA) data communication using the infrared wavelength range of 850nm to 900nm limited within. Quality of cell phone jammer will determine quality of cell phone jammer .
The openness of Java technology, security and the society has a huge resource, and its cross-platform, that is "write once, run anywhere" feature makes Java technology a smartphone software platform, the de facto standard. Using Java technology, the preparation of applications and services that people who do not care about receiving their phone service is used by the operating system and chips, just follow the requirements to write Java programs like; Similarly, the production of cell phone manufacturers do not have to concerns in the future who will provide value-added services. It can be seen, the use of Java technology, you can create a complete, cost-effective wireless data value-added services chain so as to provide flexible, personalized content and form a variety of services. The purchase of china cell phone jammer has the strict management requirements.
Java Mobile Development Status: in June this year, already has about 100 million Java phones in use, excluding China 53 mobile operators launched a Java technology-based wireless data value-added services. China Mobile has established a system of wireless Java value-added services, and launched a "treasure chest" and other services brands, including games treasure chest, treasure chest entertainment, business treasure chest, treasure chest of life, etc., have been on July 10, 2003 started the official business. China Unicom is also built on its CDMA 1X wireless Java value-added network service system, the current system is the construction process, and September 26, 2003 China Unicom, Beijing Zhenrong factoring in the Great Hall and Sun Microsystems announced the establishment of co-sponsored "UniJa technology alliance", the three parties will be Unicom's CDMA 1X network in the Java value-added services and comprehensive cooperation. The purchase of cell phone jammer is the important link of manufacturing cell phone jammer.
Infrared interface is the standard configuration of a new generation of mobile phones, it supports the phone and computer and other digital equipment for data exchange. Infrared communication has a low-cost, easy connection, easy to use and compact structure, so in small mobile devices access to a wide range of applications. Via infrared interface, various types of mobile devices can freely exchange data. Infrared is the wavelength of electromagnetic waves between 750nm to 1mm, which is higher than microwaves but lower than the frequency of visible light, is a human eye can not see the light. As the shorter infrared wavelengths, the diffraction barrier ability is poor, so more suitable for applications that require short-range wireless communications applications, for point to point data transmission line. Infrared Data Association (IRDA) data communication using the infrared wavelength range of 850nm to 900nm limited within. Quality of cell phone jammer will determine quality of cell phone jammer .
The price advantage of cell phone jammer
Similarly, when you debug a half to death when you thought you had to find a good reflection on the shortcut may not be strict adherence to good coding design specifications, does not detect some of the assumptions or correctness of the algorithm, not some possible The code marked with question mark it? on how to write high quality, please refer to Lin Rui's "high-quality c + + / c Programming Guide" or "C, 0x8 on the" classics "." The factory has the obvious price advantage of china cell phone jammer.
If you do have the pin out of the sea, in order to prevent thorn to find their own before, you have to do some preventive work, such as wearing safety gloves. Similarly, in order to expose and try to capture the source of the problem, we can design a more comprehensive error tracking code. How to do it? As much as possible for each function call fails to deal with, as far as possible test the effectiveness of each input and output parameters include pointer and test whether too much or too little to call a process. Tracking error can let you know you are probably out in which the needle position. If you do not put a pin drop in the ocean, but lost in the haystack, then write to easy to handle. Because at least we can put weeds into many pieces, one piece to find. For the module independent of large projects, often using the isolation method against those who hide deep bug is a last resort. The factory won more market shares of cell phone jammer finally for its price advantage of cell phone jammer.
If the problem is intermittent emergence, we need to find a way to reproduce it and record it to reproduce the whole process to prepare for the next time you can use these conditions to reproduce the problem. If you believe you can use the records of those conditions to reproduce the problem, then we can begin to isolate the problem. How isolated it? We can use # ifdef and problems related to some of the code may be closed, minimized to the system is still able to reproduce any problems. If you still can not locate the problem, it is necessary to open the "toolbox" of. ICE or you can try to see a suspicious monitor data changes in a variable; you can use the function call trace tool to get the case, including the transmission parameters; check whether the collapse of the memory and stack overflow problems. The price advantage of cell phone jammer is really important.
Hunters in order not to get lost in the forest itself, he often shed some of the marks on the trees to prepare for their future can be lost one day to find a way out based on these markers. Code changes for the past track record for future problems after the debugging. If one day, the last time you modify the program to run after a long time suddenly died, so when you first reaction is to change what I have in the end, because the last time before changes are good. So how to detect the relative to the last change? Yes, the code version control system, said control system SCS or VCS (Concurrent Version Control, CVS is a version of the evolution of the VCS). Check in the previous version and the current test version later down the comparison. Comparison tool can be SCS / VCS / CVS diff tool that comes with more powerful or more other tools, such as BeyondCompare and ExamDiff. By comparison, the record of all changes to the code, analysis of all suspicious code that might cause problems. The price advantage of cell phone jammer of this agent is not that obvious.
How do you know how your test comprehensive? Coverage test (coverage testing) can answer this question. Coverage testing tool can tell you that the code executed CPU in the end. Good coverage tools can often tell you about 20% to 40% of the code no problem, but the rest of the possible bug. Test coverage tools have different levels, the user can select a level of their own needs. The subject of the manager’s lecture is the price advantage of cell phone jammer.
If you do have the pin out of the sea, in order to prevent thorn to find their own before, you have to do some preventive work, such as wearing safety gloves. Similarly, in order to expose and try to capture the source of the problem, we can design a more comprehensive error tracking code. How to do it? As much as possible for each function call fails to deal with, as far as possible test the effectiveness of each input and output parameters include pointer and test whether too much or too little to call a process. Tracking error can let you know you are probably out in which the needle position. If you do not put a pin drop in the ocean, but lost in the haystack, then write to easy to handle. Because at least we can put weeds into many pieces, one piece to find. For the module independent of large projects, often using the isolation method against those who hide deep bug is a last resort. The factory won more market shares of cell phone jammer finally for its price advantage of cell phone jammer.
If the problem is intermittent emergence, we need to find a way to reproduce it and record it to reproduce the whole process to prepare for the next time you can use these conditions to reproduce the problem. If you believe you can use the records of those conditions to reproduce the problem, then we can begin to isolate the problem. How isolated it? We can use # ifdef and problems related to some of the code may be closed, minimized to the system is still able to reproduce any problems. If you still can not locate the problem, it is necessary to open the "toolbox" of. ICE or you can try to see a suspicious monitor data changes in a variable; you can use the function call trace tool to get the case, including the transmission parameters; check whether the collapse of the memory and stack overflow problems. The price advantage of cell phone jammer is really important.
Hunters in order not to get lost in the forest itself, he often shed some of the marks on the trees to prepare for their future can be lost one day to find a way out based on these markers. Code changes for the past track record for future problems after the debugging. If one day, the last time you modify the program to run after a long time suddenly died, so when you first reaction is to change what I have in the end, because the last time before changes are good. So how to detect the relative to the last change? Yes, the code version control system, said control system SCS or VCS (Concurrent Version Control, CVS is a version of the evolution of the VCS). Check in the previous version and the current test version later down the comparison. Comparison tool can be SCS / VCS / CVS diff tool that comes with more powerful or more other tools, such as BeyondCompare and ExamDiff. By comparison, the record of all changes to the code, analysis of all suspicious code that might cause problems. The price advantage of cell phone jammer of this agent is not that obvious.
How do you know how your test comprehensive? Coverage test (coverage testing) can answer this question. Coverage testing tool can tell you that the code executed CPU in the end. Good coverage tools can often tell you about 20% to 40% of the code no problem, but the rest of the possible bug. Test coverage tools have different levels, the user can select a level of their own needs. The subject of the manager’s lecture is the price advantage of cell phone jammer.
Different cell phone jammer have different cost performances
Some people have said: "Some things may be in the beginner's mind there are a variety of circumstances, in the minds of experts may be very single." Sometimes, a simple question would be to very complex, some simple system specially designed for very complex, it is because your "expert thinking." When you are stumped by the problem, turn off the computer, get out, put your question and your friends or even your dog talk, perhaps they can give you unexpected inspiration. Summary: Embedded Debugging is an art. Wanted, like other arts, if you want to succeed, you must have the wisdom, experience and know how to use tools. As long as we can well comprehend the Oracle these ten tips, I believe we are embedded testing can be successful. The cost performance of china cell phone jammer of several companies will be compared.
In the WAP programming and development, in order to website and application of the test series, we usually need to create a test environment for WAP. In general, WAP browser testing environment from the environment, the simulation environment, the establishment of three aspects of the physical environment, this section would have to make a basic introduction. Browse environment, the establishment is very simple. There are many sites on the Internet now provides a WML browser for free download. More well-known WML browser Winwap (readers can download from http://www.wapschool.com/ chinese/download/winwap22.exe) as well as mobile communications equipment provided by the browser. Install the browser, users can access the Windows system environment, WAP sites, view WAP pages. In the WAP server, developers can use Windows NT 4.0 or Windows 2000 and Internet Information Server IIS (Internet Information Server) 4.0/5.0 software simulation. Different cell phone jammer have different cost performances.
WWW Service in the original subdirectory and then create a WAP directory, all the WML pages on which, and the necessary IIS configuration. Then, the WWW server under normal operation conditions, and other developers through the WAP browser on Winwap enter http://localhost (local computer name) / wap / index.html in the form, you can browse WAP pages into the test. The advantage of this test environment is relatively simple to implement, build faster, it is relatively easy to learn operation. The downside is that this test, after all, the browser under Windows browsers, supports most of the WML markup, see the Windows interface can expand and shrink, more freedom, and thus see the test results and the actual effect on the cell phone may be relatively large difference, but it also does not provide editing, compiling and debugging the integrated environment. The cost performance of cell phone jammer is one of the most important factors in the market competition of cell phone jammer.
In the WAP programming and development, in order to website and application of the test series, we usually need to create a test environment for WAP. In general, WAP browser testing environment from the environment, the simulation environment, the establishment of three aspects of the physical environment, this section would have to make a basic introduction. Browse environment, the establishment is very simple. There are many sites on the Internet now provides a WML browser for free download. More well-known WML browser Winwap (readers can download from http://www.wapschool.com/ chinese/download/winwap22.exe) as well as mobile communications equipment provided by the browser. Install the browser, users can access the Windows system environment, WAP sites, view WAP pages. In the WAP server, developers can use Windows NT 4.0 or Windows 2000 and Internet Information Server IIS (Internet Information Server) 4.0/5.0 software simulation. Different cell phone jammer have different cost performances.
WWW Service in the original subdirectory and then create a WAP directory, all the WML pages on which, and the necessary IIS configuration. Then, the WWW server under normal operation conditions, and other developers through the WAP browser on Winwap enter http://localhost (local computer name) / wap / index.html in the form, you can browse WAP pages into the test. The advantage of this test environment is relatively simple to implement, build faster, it is relatively easy to learn operation. The downside is that this test, after all, the browser under Windows browsers, supports most of the WML markup, see the Windows interface can expand and shrink, more freedom, and thus see the test results and the actual effect on the cell phone may be relatively large difference, but it also does not provide editing, compiling and debugging the integrated environment. The cost performance of cell phone jammer is one of the most important factors in the market competition of cell phone jammer.
Cell phone jammer of the high cost performance
If almostAlwaysZero non-zero, then last = i assignment is skipped, it may not be what you expect. This problem by covering the conditions of the test tool functions can easily be found. In short, coverage testing is helpful for improving the code quality. Research has shown that software development for more than 80% is used in the following areas: debug their code (unit test); debug their code and other related (test modules); debug the entire system (system test). The customer lays most importance on the cost performance of china cell phone jammer .
Worse, you may need to take 10-200 times the time to find a bug, but this bug in the beginning may be easy to find. A small bug may allow you to pay a heavy price, even if the bug on the overall system performance is not significantly affected, but it may affect those who can see some of you. So we have to develop good coding and testing methods in order to better code quality, to shorten the debugging code. This world is no universal plaster. There is also a strong profile and then when the spirit is willing; memory no matter how good the monitor, but also can not find the time; coverage tool easy to use and then also not covered places. Even some of the problems hidden deep exhausted all tools may not be found in its roots, then we can do is shown by these external phenomena or some of the data output to discover the laws or abnormal. If you notice any unusual, and must thoroughly understand its roots back until resolved. The customer will definitely choose cell phone jammer of the high cost performance.
Worse, you may need to take 10-200 times the time to find a bug, but this bug in the beginning may be easy to find. A small bug may allow you to pay a heavy price, even if the bug on the overall system performance is not significantly affected, but it may affect those who can see some of you. So we have to develop good coding and testing methods in order to better code quality, to shorten the debugging code. This world is no universal plaster. There is also a strong profile and then when the spirit is willing; memory no matter how good the monitor, but also can not find the time; coverage tool easy to use and then also not covered places. Even some of the problems hidden deep exhausted all tools may not be found in its roots, then we can do is shown by these external phenomena or some of the data output to discover the laws or abnormal. If you notice any unusual, and must thoroughly understand its roots back until resolved. The customer will definitely choose cell phone jammer of the high cost performance.
The new building of the warehouse of china cell phone jammer has been put into service
These phones use the UIQ interface, mainly, of which Sony Ericsson P802, P908, represented. UIQ is a customizable pen-based handwritten application interface, it is suitable to support multimedia-rich cell phones. Using a full keyboard and large color screen cell phone (Symbian s80). These phones away from the office for those who need to edit information and view business data for users of advanced mobile communications. Nokia 9300-9500 series personal communications interface is a typical representative of such applications. The new building of the warehouse of china cell phone jammer has been put into service.Symbian OS provides a flexible application interface (UI) framework, not only developers to quickly master the necessary skills, but also enables handset manufacturers to introduce a different interface products. Symbian OS phones can use a variety of application interfaces in the form: one is very similar in design, the most common cell phone, which is primarily through the keyboard input of the phone; the other is to use the stylus to operate; there is a class of both the keyboard another touch screen phone, it has a larger screen and smaller keyboard. Different input methods and design sections of the phone's main purpose will have a huge impact. Application interface requirements and the market is determined by the cell phone. With the Symbian operating system, handset manufacturers and third party developers can develop cell phones that these types of unique application interface. A new warehouse of cell phone jammer is under the construction.
Such phones require flexible application interface, user-friendly navigation key (Joystick), through soft keys or key turning point (Jogdial) operation, the Nokia 3650 and N-Gage is on behalf of their applications using the Series 60 interface. Such as the Nokia 6600; Nokia 7610; Nokia 6670, etc.; Series60 difference factor is the most intuitive screen resolution, Series60 supports a resolution of 176 * 208 pixels, but will also support future Series60 240 * 320 pixels, 352 * 416 pixels and so on . Series60 interface is the largest third-party software or games Interface, will naturally become the Symbian smartphone operating system used most frequently Series. The new building of storing cell phone blocker will be built next year.
Such phones require flexible application interface, user-friendly navigation key (Joystick), through soft keys or key turning point (Jogdial) operation, the Nokia 3650 and N-Gage is on behalf of their applications using the Series 60 interface. Such as the Nokia 6600; Nokia 7610; Nokia 6670, etc.; Series60 difference factor is the most intuitive screen resolution, Series60 supports a resolution of 176 * 208 pixels, but will also support future Series60 240 * 320 pixels, 352 * 416 pixels and so on . Series60 interface is the largest third-party software or games Interface, will naturally become the Symbian smartphone operating system used most frequently Series. The new building of storing cell phone blocker will be built next year.
Remotely control and manage cell phone jammer
Prevention method is low-voltage warning appears when the phone or automatic shutdown to wait to charge the battery fully discharge and then, and in accordance with the requirements of different models to ensure that sufficient charging time, you can prevent the battery have a "memory effect." In addition, the mobile phone turned on to discharge the battery completely and then fully charge, repeated three or more, the "memory effect" can be eliminated. Mobile users should be prepared with a few large battery backup. There are a number of mobile users prefer to prepare a few other panels, although they may be a pressing problem, but when you buy additional panels taken to guard against. Counterfeit mobile phone batteries is very damaging to the board, then how can we identify the genuine and fake mobile phone batteries boards do? The more visualized explanation is that the requestor is serially connected with the power end of china cell phone jammer.
See identity: the identity of real battery board printing is very clear, while the fake product is remake of the printing plate, illegible. True solar panels "±" symbol polarity done directly on the metal contacts, to do the fake plastic top, and some did not "±" sign. Look at technology: the use of ultrasonic welding is really panels, front and back covers can not be separated, no obvious cracks. The counterfeit batteries plates are mostly handmade, glued, an exemption will be a little hard two and a half. Look at safety: regular mobile phone panels to protect the batteries and cell phones, are equipped with temperature control switch, if the charging time is too long, the voltage is too high, sharp rise in temperature, solar panels will be promptly cut off the power when hot, to prevent battery leakage or explosion. The inferior panels, this is not the device, but electric soldering iron, even the camera-specific small non-rechargeable battery together, and counterfeit lithium batteries, such as the forced charging, may cause an explosion. It can remotely control and manage cell phone jammer.
See identity: the identity of real battery board printing is very clear, while the fake product is remake of the printing plate, illegible. True solar panels "±" symbol polarity done directly on the metal contacts, to do the fake plastic top, and some did not "±" sign. Look at technology: the use of ultrasonic welding is really panels, front and back covers can not be separated, no obvious cracks. The counterfeit batteries plates are mostly handmade, glued, an exemption will be a little hard two and a half. Look at safety: regular mobile phone panels to protect the batteries and cell phones, are equipped with temperature control switch, if the charging time is too long, the voltage is too high, sharp rise in temperature, solar panels will be promptly cut off the power when hot, to prevent battery leakage or explosion. The inferior panels, this is not the device, but electric soldering iron, even the camera-specific small non-rechargeable battery together, and counterfeit lithium batteries, such as the forced charging, may cause an explosion. It can remotely control and manage cell phone jammer.
China cell phone jammer sometimes can be considered as the meeting information security equipment
The integration of two modules, allowing users the choice of wireless data transmission when there is greater freedom of choice, with wireless data transmission technology has become more sophisticated, I believe that cell phone jammer and personal digital consumer products will be more mature and stable wireless transmission technology application of them. WIFI full name of Wireless Fidelity, also known as the 802.11b standard, it's biggest advantage is that higher transmission speed up to 11Mbps, while its effective range is also very long, but also with various existing 802.11 DSSS devices. This summer the most popular notebook technology - based on the Centrino technology is the standard. IEEE 802.11b wireless networking standard is IEEE 802.11 networking standard variants, the maximum bandwidth of 11 Mbps, the signal is weak or noisy, the bandwidth is adjustable to 5.5Mbps, 2Mbps and 1Mbps, Automatic bandwidth adjustment, effective protection of the network stability and reliability. china cell phone jammer sometimes can be considered as the meeting information security equipment.
Its main features are: fast, reliable, in open areas, communication distance up to 305 meters in a closed area, the communication distance of 76 meters to 122 meters, the convenience and integration of the existing wired Ethernet network, group network at lower cost. Wi-Fi, WirelessFidelity, Wi-Fi technology and Bluetooth technology ?? like belong in the office and home use of short-range wireless technology. The technology used in the vicinity of the 2.4GHz band, the band is still useless now licensed wireless spectrum. The current use of the standard two, respectively, IEEE802.11a and IEEE802.11b. As the technology has its own advantages, so by the manufacturers. mobile phone jammer is manufactured through using the advanced foreign technology.
The place of high voltage is not good for mobile phone jammer
The best time to buy a card with a personal machine to try to see whether the delay in mp3 player and so on. Finally, take a look at the MMC has no scratches above the contact point, usually the new card is not. china cell phone jammer is a quiet equipment which can be reliably used.
Needless to say, we can feel, Symbian mobile phone operating system is now the most widely used areas of the operating system, and has quite a different user interface, which is often said that the Series. Interface on Symbian OS, there are always many people confused about the rules of their division, then we introduce a simple version of the typical characteristics of each system. Let's clear a concept: whether Series60, Series80, Series90 or UIQ, they are developed based on the Symbian platform interface, and then each according to some hardware features to make that distinction. It is rumored Nokia may launch Series50 and Series100 interface, but can not determine its authenticity. The place of high voltage is not good for mobile phone jammer.
Series60 Symbian smart phones in the most widely used version of the system. Series60 system is also divided into the Symbian 6.0 OS Series60, Symbian 7.0 OS Series60 and Symbian 8.0 OS Series60 three versions. Series60 difference factor is the most intuitive screen resolution, Series60 supports a resolution of 176 * 208 pixels, but will also support future Series60 240 * 320 pixels, 352 * 416 pixels and so on. Series60 interface is the largest third-party software or games Interface, will naturally become the Symbian smartphone operating system used most frequently Series. Phone models using Series60 interface, not list them here, just Nokia's smart phones, there is a considerable number of used Series60 interface. The location of high magnetism degree may do harm to cell phone jammer.
Identification Series80 interface easiest way is to see whether the phone supports QWERTY KEYBROAD, such as the Nokia high-end series 9210,9300 or even 9500, are based on the QWERTY KEYBROAD's. The Series80 screen resolution for more special 640 * 200 pixels. Series90 Symbian platform is the youngest interface, support for Nokia Series90 the 7700 and 7710, only two phones.
Needless to say, we can feel, Symbian mobile phone operating system is now the most widely used areas of the operating system, and has quite a different user interface, which is often said that the Series. Interface on Symbian OS, there are always many people confused about the rules of their division, then we introduce a simple version of the typical characteristics of each system. Let's clear a concept: whether Series60, Series80, Series90 or UIQ, they are developed based on the Symbian platform interface, and then each according to some hardware features to make that distinction. It is rumored Nokia may launch Series50 and Series100 interface, but can not determine its authenticity. The place of high voltage is not good for mobile phone jammer.
Series60 Symbian smart phones in the most widely used version of the system. Series60 system is also divided into the Symbian 6.0 OS Series60, Symbian 7.0 OS Series60 and Symbian 8.0 OS Series60 three versions. Series60 difference factor is the most intuitive screen resolution, Series60 supports a resolution of 176 * 208 pixels, but will also support future Series60 240 * 320 pixels, 352 * 416 pixels and so on. Series60 interface is the largest third-party software or games Interface, will naturally become the Symbian smartphone operating system used most frequently Series. Phone models using Series60 interface, not list them here, just Nokia's smart phones, there is a considerable number of used Series60 interface. The location of high magnetism degree may do harm to cell phone jammer.
Identification Series80 interface easiest way is to see whether the phone supports QWERTY KEYBROAD, such as the Nokia high-end series 9210,9300 or even 9500, are based on the QWERTY KEYBROAD's. The Series80 screen resolution for more special 640 * 200 pixels. Series90 Symbian platform is the youngest interface, support for Nokia Series90 the 7700 and 7710, only two phones.
The weight of mobile phone jammer
The weight of mobile phone jammer is 1.5 kg.
With China's accession to WTO, China's telecommunications industry entered a new stage of development, restructuring in the telecommunications business began to form after a new competition, the monopoly will be broken the ice, entered the telecommunications industry is bound to rely on a cost service, integrated business model and strategic factors such as the era of full competition. At present, China is implementing the 10th Five-Year Plan, the state target is 2005, the communications business revenue will reach one trillion yuan, 5-year average increase of 23%. By then, the fixed, mobile telephone network scale and capacity are expected to rank first in the world, phone users reached 500 million, data, multimedia and Internet users reached 200 million cell phone jammer, Internet penetration reached 15% of the population. China's future construction of a large telecommunications network, will bring huge market demand. At present the total number of telephone users in China reached 330 million, of which 179 million fixed telephone users, cell phone users 145 million. Main fixed-line telephone penetration rate of 13.9%, cell phone penetration rate reached 11.3%, more than 30 million Internet users. Last year China replaced the U.S. as the world's largest cell phone market, but also a few still maintain high growth of major cell phone markets. However, China's telecommunications industry has entered the marginal profit. From China Telecom, China Mobile and other telecom companies by Unicom, China Railcom and other rising star challenges start to break multi-polarization of the main telecom operators in China communication industry's monopoly status, competition pattern has been formed.
With China's accession to WTO, China's telecommunications industry entered a new stage of development, restructuring in the telecommunications business began to form after a new competition, the monopoly will be broken the ice, entered the telecommunications industry is bound to rely on a cost service, integrated business model and strategic factors such as the era of full competition. At present, China is implementing the 10th Five-Year Plan, the state target is 2005, the communications business revenue will reach one trillion yuan, 5-year average increase of 23%. By then, the fixed, mobile telephone network scale and capacity are expected to rank first in the world, phone users reached 500 million, data, multimedia and Internet users reached 200 million cell phone jammer, Internet penetration reached 15% of the population. China's future construction of a large telecommunications network, will bring huge market demand. At present the total number of telephone users in China reached 330 million, of which 179 million fixed telephone users, cell phone users 145 million. Main fixed-line telephone penetration rate of 13.9%, cell phone penetration rate reached 11.3%, more than 30 million Internet users. Last year China replaced the U.S. as the world's largest cell phone market, but also a few still maintain high growth of major cell phone markets. However, China's telecommunications industry has entered the marginal profit. From China Telecom, China Mobile and other telecom companies by Unicom, China Railcom and other rising star challenges start to break multi-polarization of the main telecom operators in China communication industry's monopoly status, competition pattern has been formed.
Interference with operation of the equipment
As the mobile communication rapidly develops, the human being is striding forward towards the great goal of global seamless communication in any place at any time. However, when the cell phone facilitates people’s daily life, it also causes many problems, such as interfering with others. For example, we will always be interfered with by the sudden cell phone bell in such quiet and serious locations as the meeting room, library, cinema, classroom, church, concert hall and so on.
Interference with operation of the equipment
The china cell phone jammer needs to transmit strong high-frequency electromagnetic wave to the outside during its working process. Definitely, it will interfere with the around sensitive electrical apparatus. Such locations as hospital, petrol station, and airport and so on are extremely sensitive to electromagnetic radiation of the cell phone.
Leaking
For our country has mastered the core technology of the cell phone, leaking accident of the cell phone happens at times. Even if the cell phone is turned off, it is still hard to avoid leaking completely. This kind of problems are extremely serious in such locations as the business meeting room of enterprise and institution, court, government office, secrecy bureau, public security bureau, financial organization, law advisory office, embassy, army and so on.
Cheating in the examination room
It is the usual phenomenon in the school examinations to use the cell phone to pass on the answer. For the body search is not convenient to implement, this phenomenon has become a big problem which bothers the examination organizer.
Interference with operation of the equipment
The china cell phone jammer needs to transmit strong high-frequency electromagnetic wave to the outside during its working process. Definitely, it will interfere with the around sensitive electrical apparatus. Such locations as hospital, petrol station, and airport and so on are extremely sensitive to electromagnetic radiation of the cell phone.
Leaking
For our country has mastered the core technology of the cell phone, leaking accident of the cell phone happens at times. Even if the cell phone is turned off, it is still hard to avoid leaking completely. This kind of problems are extremely serious in such locations as the business meeting room of enterprise and institution, court, government office, secrecy bureau, public security bureau, financial organization, law advisory office, embassy, army and so on.
Cheating in the examination room
It is the usual phenomenon in the school examinations to use the cell phone to pass on the answer. For the body search is not convenient to implement, this phenomenon has become a big problem which bothers the examination organizer.
Working principle of the cell phone is as follows
Working principle of the cell phone is as follows: the cell phone jammer connects with base station through the radio wave with the specific baud rate and modulation mode within the specified frequency range to complete transmission of data and voice.
The mobile communication has the following general standard in the world wide:
1) GSM: specification of aerial interface is as follows:
Parameter, specification 1 (GSM 900), specification 2 (DCS-1800), specification (DCS-1900)
Backward channel frequency: 890~915MHz 1710~1785MHz 1880~1920MHz
Forward channel frequency: 935~960MHz 1800~1880MHz 1950~1990MHz
Rate of modulating data: 270.833kbps 270.833kbps 270.833kbps
Modulation mode: GMSK GMSK GMSK
Channel interval: 200KHz 200KHz 200KHz
Frame length: 4.615ms 4.615ms 4.615ms
Types: cellular TDMA; cellular TDMA; cellular TDMA.
The series of this type of cell phone jammer
The series of this type of cell phone jammer has water-proof and anti-explosion physical characteristics, applicable to locations of poor conditions, such as the flammable and explosive processing location, workshop, warehouse, jail, detention house, penal farm, war room in the army and so on. The after service of the product is three-month replacement, one-year repair and forever maintenance.
Working frequency channel range: 870MHz(-5MHz)-880MHz(+5MHz);935MHz (-5MHz)-960MHz(+5MHz);1800MHz(-5MHz)-1850MHz(+5MHz);1900MHz(-5MHz)-1920MHz(+5MHz); Shielding working radius of single machine: 5m-50m; Referenced field strength environment: -50dB-80dB; Cell phone system to be shielded: GSM 、 CDMA 、DCS 、PHS; Working mode: wireless interference signal of high-efficient sweep frequency and continuous interference; Working power supply: 198-242v/50/60HZ, AC power supply; Input power: 25W; Ambient temperature: -25℃～45℃; Relative humidity: applicable to more than 90%; Weight: less than 2kg; Configuration (main machine): 18cm × 15cm × 7.5cm
Working frequency channel range: 870MHz(-5MHz)-880MHz(+5MHz);935MHz (-5MHz)-960MHz(+5MHz);1800MHz(-5MHz)-1850MHz(+5MHz);1900MHz(-5MHz)-1920MHz(+5MHz); Shielding working radius of single machine: 5m-50m; Referenced field strength environment: -50dB-80dB; Cell phone system to be shielded: GSM 、 CDMA 、DCS 、PHS; Working mode: wireless interference signal of high-efficient sweep frequency and continuous interference; Working power supply: 198-242v/50/60HZ, AC power supply; Input power: 25W; Ambient temperature: -25℃～45℃; Relative humidity: applicable to more than 90%; Weight: less than 2kg; Configuration (main machine): 18cm × 15cm × 7.5cm
Main characteristics of cell phone jammer
It is the usual phenomenon in the school examinations to use the cell phone to pass on the answer. For the body search is not convenient to implement, this phenomenon has become a big problem which bothers the examination organizer.
DM-1301 type of cell phone jammer adopts the latest electronic interference technology. It can cut off connection between the wireless cell phone and mobile communication base station so that the cell phone can not make or answer calls in the specified range. And then purpose of shielding cell phone signal can be achieved and the above problems can be avoided. The cell phone jammer can block the following cell phone systems: GSM of China Mobile; GSM and CDMA of China Unicom; PHS of China Telecom.
Main functions of cell phone jammer: it can shield such wireless communication tools as GSM, CDMA cell phone and PHS.
Main characteristics of cell phone jammer: 1. the effective shielding rang is 10-30m (dependent on distance of the base station); 2. it is environmentally green and does no harm to human body; 3. it will not influence the cell phone signal outside the working range; 4. it is easy and convenient to install and it can be used after inserting the plug.
Applicable range of cell phone jammer: it is applicable to the meeting room, examination room, concert hall, cinema, library, court ad church and so on.
SM-20018 type of mobile phone jammer
Radius of Cellular Phone Jammer : 15-50m (dependent on distance of the base station)
Small volume and light weight
Volume of cell phone jammer: 260w*140d*55h (unit: mm)
Weight of cell phone jammer: 2KG
Working temperature of the machine body is over 10℃ lower than that of the product of the rival.
Power supply adapter of cell phone jammer: AC110-240V 50/60HZ
Brand: SM; Model: SM-20018;
Covering radius of cell phone jammer: 50m.
SM-20018 type of mobile phone jammer (also known as cell phone interference unit/breaker/suppressor/cropper/isolator/meeting information security equipment) is the high-tech product carefully and successfully researched, developed and manufactured by our company using the foreign advanced technology according to actual situation of mobile communication for situations that some lawless persons cheat in the examination by using the cell phone during the university entrance exam, adult college entrance exam, self-taught exam and examinations of various schools, students use the cell phone to text during the class in various junior schools and senior schools and the cell phone troubles and bothers in such serious locations as party and government offices, meeting rooms of enterprise, concert hall and theater and so on.
Main functions of cell phone jammer
Main technical indices of cell phone jammer: effective shielding diameter is 40m or so (dependent on strength of indoor cell phone signal); shielding signal band width: 860MHZ―885MHZ；930MHZ―960MHZZ；1800MHZ―1990MHZ; ambient temperature: -20℃~+55℃; relative humidity: 30%~95%; power supply voltage: input, AC 100V~240V; volume: 210mm×135mm×45mm.
Main functions of cell phone jammer: it can effectively shield such cell phone signals as GSM900、DCS1800、PCS1900、CDMA and PHS; it only shields cell phone signal and not influence normal work of other electronic equipments; it can be used in any area over 200m away from the base station; it can stably work for a long time after switching on; the slow-start circuit design can avoid sparking phenomenon caused the mechanical switch.
The cell phone jammer is the most convenient for use with high cost performance in the current market.
Main functions of cell phone jammer: it can effectively shield such cell phone signals as GSM900、DCS1800、PCS1900、CDMA and PHS; it only shields cell phone signal and not influence normal work of other electronic equipments; it can be used in any area over 200m away from the base station; it can stably work for a long time after switching on; the slow-start circuit design can avoid sparking phenomenon caused the mechanical switch.
The cell phone jammer is the most convenient for use with high cost performance in the current market.
Purpose of forcibly forbidding using of the cell phone can be achieved
it can make sending and receiving functions of mobile phones in the specified area invalid so that cell phones can not make or answer calls and purpose of forcibly forbidding using of the cell phone can be achieved.
It is applicable to the following locations: important meeting rooms of such government departments as the party committee (ministry committee, provincial committee, autonomous region committee, municipal committee, prefectural committee and county committee), war unit in army, staff office, confidential room, petrol station, gas station, oil field, oil depot, oil refinery, petrochemical base, hospital (including operation room, CT room, ICU, outpatient clinic), judicial tribunal, prison, TV and telephone meeting room of public security department, confidential fax room, examination room, classroom, bid venue, memorial hall, museum, TV station, studio, recording room, theater/concert hall, financial institution, high-level hotel banquet hall, civil flight control department and public places where noise is forbidden.
It is applicable to the following locations: important meeting rooms of such government departments as the party committee (ministry committee, provincial committee, autonomous region committee, municipal committee, prefectural committee and county committee), war unit in army, staff office, confidential room, petrol station, gas station, oil field, oil depot, oil refinery, petrochemical base, hospital (including operation room, CT room, ICU, outpatient clinic), judicial tribunal, prison, TV and telephone meeting room of public security department, confidential fax room, examination room, classroom, bid venue, memorial hall, museum, TV station, studio, recording room, theater/concert hall, financial institution, high-level hotel banquet hall, civil flight control department and public places where noise is forbidden.
Five advantages of the series of green cellphone jammer
1. imported chip: all chips of the product adopts those from TI to ensure quality and stability of the product;
2. adjustable power: the shielding range can be adjusted within the radius of 20m-60m (the user can flexibly adjust as per the need.);
3. switch: the switch is allocated on the product and power supply for user’s convenient operation;
4: four channels: four channels (four pieces of antennae) of the product crosswise shield with the much better shielding effect compared with the product with built-in antenna or two pieces of antennae;
5. after service: the warranty period is three years.
The lowest price and best after service are our target.
2. adjustable power: the shielding range can be adjusted within the radius of 20m-60m (the user can flexibly adjust as per the need.);
3. switch: the switch is allocated on the product and power supply for user’s convenient operation;
4: four channels: four channels (four pieces of antennae) of the product crosswise shield with the much better shielding effect compared with the product with built-in antenna or two pieces of antennae;
5. after service: the warranty period is three years.
The lowest price and best after service are our target.
Sunday, May 20, 2012
The warehouse has the strict requirements for the moisture to maintain china cell phone jammer in the good state
Disassembly of Antenna of cell phone jammer
And similar PDA, smart phone's storage space is divided into two categories - ROM and RAM, the read-only memory and random access memory, read-only memory, usually flash memory chips, used to store the operating system and factory-installed applications Even without electricity in the battery case, the data stored in flash memory is not lost, so the high-end smart phone flash memory capacity larger than the save operation system, extra storage space can be used to back up contacts and other important data. Random Access Memory is the smart phones we are usually talking about the "memory" is usually a faster DRAM chips. The working personnel should keep the warehouse of cell phone jammer in the dry status.
Storage device with random data and run the program two purposes, the user can divide the number of memory used for "storage." How much memory is used for "program." Storage memory is used to install applications and save a variety of data, similar to the hard disk function, and the procedure is similar to the memory on the PC's main memory for running the operating system and various applications. As the data in the DRAM chip will be lost after power down, so, like smart phones and PDAs have a spare battery, replace the main battery or the main battery is discharged in the case can maintain data in memory. Application processor in the smart phone's role in the role and status, the equivalent of the computer's central processor and chipset. Intel's current application processor mainly by the PXA25x, PXA26x and PXA27x family are based on three core Intet XScale processor integrates a 32-bit data operation, media processing, memory control, expansion card / USB / Bluetooth interface control, baseband interface control. The warehouse has the strict requirements for the moisture to maintain china cell phone jammer in the good state.
PXA26x for the first time with a MCP (Multi Chip Package) packaging technology, the flash memory chips and application processors packaged in a single chip, the chip size shrink further than the PXA25x. PXA27x is the latest model, the highest frequency of 624MHz, with the "Wireless MMX" (wireless multimedia instruction set), "Quick Capture" technology (to support four million pixel digital camera) and "Wireless Intel SpeedStep" technology (with 5 low-energy mode, voltage and frequency can be dynamically changed). Not difficult to find, these technologies are both PC and laptop technology, "smart phone version of" The smart phone concept with a lot of processor PC and laptop processors are similar. Multimedia accelerators is designed specifically for smart phones video and graphics acceleration hardware chip. The Intel 2700G, for example, it has the performance 2D/3D graphics, DVD-quality video playback and dual display capabilities. The ventilated condition of the warehouse of cell phone jammer can ensure the good working status of cell phone jammer.
And similar PDA, smart phone's storage space is divided into two categories - ROM and RAM, the read-only memory and random access memory, read-only memory, usually flash memory chips, used to store the operating system and factory-installed applications Even without electricity in the battery case, the data stored in flash memory is not lost, so the high-end smart phone flash memory capacity larger than the save operation system, extra storage space can be used to back up contacts and other important data. Random Access Memory is the smart phones we are usually talking about the "memory" is usually a faster DRAM chips. The working personnel should keep the warehouse of cell phone jammer in the dry status.
Storage device with random data and run the program two purposes, the user can divide the number of memory used for "storage." How much memory is used for "program." Storage memory is used to install applications and save a variety of data, similar to the hard disk function, and the procedure is similar to the memory on the PC's main memory for running the operating system and various applications. As the data in the DRAM chip will be lost after power down, so, like smart phones and PDAs have a spare battery, replace the main battery or the main battery is discharged in the case can maintain data in memory. Application processor in the smart phone's role in the role and status, the equivalent of the computer's central processor and chipset. Intel's current application processor mainly by the PXA25x, PXA26x and PXA27x family are based on three core Intet XScale processor integrates a 32-bit data operation, media processing, memory control, expansion card / USB / Bluetooth interface control, baseband interface control. The warehouse has the strict requirements for the moisture to maintain china cell phone jammer in the good state.
PXA26x for the first time with a MCP (Multi Chip Package) packaging technology, the flash memory chips and application processors packaged in a single chip, the chip size shrink further than the PXA25x. PXA27x is the latest model, the highest frequency of 624MHz, with the "Wireless MMX" (wireless multimedia instruction set), "Quick Capture" technology (to support four million pixel digital camera) and "Wireless Intel SpeedStep" technology (with 5 low-energy mode, voltage and frequency can be dynamically changed). Not difficult to find, these technologies are both PC and laptop technology, "smart phone version of" The smart phone concept with a lot of processor PC and laptop processors are similar. Multimedia accelerators is designed specifically for smart phones video and graphics acceleration hardware chip. The Intel 2700G, for example, it has the performance 2D/3D graphics, DVD-quality video playback and dual display capabilities. The ventilated condition of the warehouse of cell phone jammer can ensure the good working status of cell phone jammer.
The joint venture of cell phone jammer will be open next month
VCO phase detector output signal is compared with the reference signal. In the frequency synthesis, in order to improve control accuracy, the phase detector working at low frequencies. The VCO output frequency is relatively high, in order to improve the control accuracy of the loop, you can not do without frequency technology. Phone frequency synthesis loop and more loop frequency synthesizer using a different divider different: the receiver first local oscillator (RXVCO, UHFVCO, RFVCO) signal with the channel change, and the frequency synthesizer in the loop divider is a programmable divider, the divider ratio is controlled by the data signal frequency synthesizer (SYNDAT \ SYNCLK, SYNSTR). The china cell phone jammer company will establish a joint venture of cell phone jammer.
Two oscillator VCO, also known as the IF VCO (1FVCO, VHFVCO), the signal is fixed, IF VCO frequency synthesis loop in the divider ratio is fixed. Divider output signal to the phase detector, and the reference clock signal for phase comparison. When the VCO is in normal working condition, VCO output a fixed frequency. If some external factors such as voltage, temperature can cause the VCO frequency is increased, the frequency output signal is f2 / N n higher than the reference signal, the phase detector to detect the changes, the output voltage decreases, the varactor both ends of the reverse bias decreases. This makes the varactor diode junction capacitance increases, changes in the oscillation circuit, VCO output frequency is reduced. If external factors cause the VCO frequency decreases, the control loop perform the opposite process. The joint venture of cell phone jammer will be open next month.
The above is a description of how to make the VCO output frequency stability. But how to make the VCO frequency change it? In explaining this question, first to explain why the frequency of the VCO to change this problem. Because cell phones are cell phone, moving to another place, for the cell phone service cell (CELL) becomes another of the frequency, so they must change their cell phones to receive and transmit frequency. VCO frequency change is as follows: a new cell phone received a change in the frequency of signaling after the signaling demodulation, decoding, cell phones through three lines of the CPU (that is, the CPU SYNDAT, SYNCLK, SYNSTR feet) on the phase-locked loop issued instructions to change the frequency of the circuit, to change the programmable divider ratio, and in a very short period of time. In these three lines under the control of phase-locked loop output voltage to change, and with this has been larger or smaller to control the voltage of the VCO varactor diode, the VCO output frequency to change to the new area on the frequency of use. The joint venture of cell phone jammer locates in the northern area.
Two oscillator VCO, also known as the IF VCO (1FVCO, VHFVCO), the signal is fixed, IF VCO frequency synthesis loop in the divider ratio is fixed. Divider output signal to the phase detector, and the reference clock signal for phase comparison. When the VCO is in normal working condition, VCO output a fixed frequency. If some external factors such as voltage, temperature can cause the VCO frequency is increased, the frequency output signal is f2 / N n higher than the reference signal, the phase detector to detect the changes, the output voltage decreases, the varactor both ends of the reverse bias decreases. This makes the varactor diode junction capacitance increases, changes in the oscillation circuit, VCO output frequency is reduced. If external factors cause the VCO frequency decreases, the control loop perform the opposite process. The joint venture of cell phone jammer will be open next month.
The above is a description of how to make the VCO output frequency stability. But how to make the VCO frequency change it? In explaining this question, first to explain why the frequency of the VCO to change this problem. Because cell phones are cell phone, moving to another place, for the cell phone service cell (CELL) becomes another of the frequency, so they must change their cell phones to receive and transmit frequency. VCO frequency change is as follows: a new cell phone received a change in the frequency of signaling after the signaling demodulation, decoding, cell phones through three lines of the CPU (that is, the CPU SYNDAT, SYNCLK, SYNSTR feet) on the phase-locked loop issued instructions to change the frequency of the circuit, to change the programmable divider ratio, and in a very short period of time. In these three lines under the control of phase-locked loop output voltage to change, and with this has been larger or smaller to control the voltage of the VCO varactor diode, the VCO output frequency to change to the new area on the frequency of use. The joint venture of cell phone jammer locates in the northern area.
The truck is full of cell phone jammer and leaving the company
Assembly of Antenna of cell phone jammer
Through GPRS connection to the Internet, enables Web browsing, E-mail and other network applications. MSN Messenger, QQ, YaHoo Messenger and other instant messaging tools have a smart phone version, and chat with friends anytime, anywhere. Smart phone without a computer to download e-books, you can always find and download on the Internet. Windows Mobile smart phone supports Word, Excel, PowerPoint and PDF documents are displayed, only regret is that the screen a little small. The worker is loading china cell phone jammer into the truck.
Provides for smart phones and communication needs of business people working a variety of software, such as providing Worldmate world clock, currency exchange, goods inventory and other functions often make international travel for business people is very useful, it also access the world through the network major cities of the weather. The Business Travel provides a treasure of information in big cities, maps, and hotel, air ticket booking and other functions. In addition, install the appropriate software, stock quotes, and banking services can also be under control. Although the multimedia capabilities of smart phones is still in the early stages of development, but play games, listen to MP3, network television, camera, video, and video MMS and so on are possible, and there are many resources to choose from. The worker is handling the parts and components of cell phone jammer in the workshop.
Since the 2.5G cell phone, the mobile platform gradually evolved from the voice platform for video, data, entertainment, business, multi-payment platform. 3G era, the network speed increase will further stimulate mobile multimedia applications. In response to the growing number of multimedia applications, baseband processor has been unable to meet demand. If the baseband processor to handle these tasks, the software will be very large, very long development cycle. The cell phone has become a fast moving consumer goods, multimedia application processor came into being. The multimedia application processor is the basic knowledge needed to video decoding and 3D acceleration. Additional applications will be the future of mobile is not limited to multimedia applications. Wi-Fi, UWB, A-GPS, Bluetooth, infrared, 3D games, electronic payment, security and other applications will be a lot there. With the application processor is the emergence of these applications, and develop a single-purpose applications processor is not appropriate, determine the volume of cell phone application processor must correspond to the vast majority of cell phone applications. Early application processor is usually after the camera control or camera signal processing section, and later music applications, video capture, TV spate of applications, application processor into a variety of applications processors. The truck is full of cell phone jammer and leaving the company.
Through GPRS connection to the Internet, enables Web browsing, E-mail and other network applications. MSN Messenger, QQ, YaHoo Messenger and other instant messaging tools have a smart phone version, and chat with friends anytime, anywhere. Smart phone without a computer to download e-books, you can always find and download on the Internet. Windows Mobile smart phone supports Word, Excel, PowerPoint and PDF documents are displayed, only regret is that the screen a little small. The worker is loading china cell phone jammer into the truck.
Provides for smart phones and communication needs of business people working a variety of software, such as providing Worldmate world clock, currency exchange, goods inventory and other functions often make international travel for business people is very useful, it also access the world through the network major cities of the weather. The Business Travel provides a treasure of information in big cities, maps, and hotel, air ticket booking and other functions. In addition, install the appropriate software, stock quotes, and banking services can also be under control. Although the multimedia capabilities of smart phones is still in the early stages of development, but play games, listen to MP3, network television, camera, video, and video MMS and so on are possible, and there are many resources to choose from. The worker is handling the parts and components of cell phone jammer in the workshop.
Since the 2.5G cell phone, the mobile platform gradually evolved from the voice platform for video, data, entertainment, business, multi-payment platform. 3G era, the network speed increase will further stimulate mobile multimedia applications. In response to the growing number of multimedia applications, baseband processor has been unable to meet demand. If the baseband processor to handle these tasks, the software will be very large, very long development cycle. The cell phone has become a fast moving consumer goods, multimedia application processor came into being. The multimedia application processor is the basic knowledge needed to video decoding and 3D acceleration. Additional applications will be the future of mobile is not limited to multimedia applications. Wi-Fi, UWB, A-GPS, Bluetooth, infrared, 3D games, electronic payment, security and other applications will be a lot there. With the application processor is the emergence of these applications, and develop a single-purpose applications processor is not appropriate, determine the volume of cell phone application processor must correspond to the vast majority of cell phone applications. Early application processor is usually after the camera control or camera signal processing section, and later music applications, video capture, TV spate of applications, application processor into a variety of applications processors. The truck is full of cell phone jammer and leaving the company.
Construction of new china cell phone jammer factory building is in the process
Panasonic GD90 cell phone reception and launch of the first mixer to be used to RXVCO conversion circuit signal, and RXVCO circuit module provided by the U302. U302 module can work in GSM mode or DCS mode, the band switching control signals DCS-GSM work through the Q301 circuit to U302 in the corresponding mode. U302 pin 1 is signal output; 3 feet is the band switching control terminal; 5 feet is the control side; 7 feet is the power supply side. When the U302 work on the GSM frequency band, from 1 foot produce 1160 ~ 1185MHz, a local oscillator signal. When the U302 working in DCS band, the heavier the foot produces 1580 - 1665MHz, a local oscillator signal. Construction of new china cell phone jammer factory building is in the process.
U302's output is divided into two: 39 feet all the way to the U101 as the output signal; another way to 13 feet for the phase-locked loop U301 sampling signal. The signal is divided in U301 and compared with the reference clock signal, the voltage control signal to be 9 feet from the U301 output signal through the resistor R302, R303 and R304 and capacitor C311 and other form of low-pass filter circuit to the U302's 5 feet, by changing the U302 in both ends of the varactor reverse bias, the output frequency to control U302. When the logic circuit by SYNEN, SYNDATA, SYNCLK U301 in three lines to change the divider ratios, U301 9-pin voltage changed, U302's output frequency is also changed, to channel conversion purposes. The cell phone jammer company decides to hold the ribbon –cutting ceremony.
For the second inverter circuit superheterodyne receiver circuit: two oscillator VCO frequency synthesizer main role is to produce two vibration signals sent to the receiver two mixer circuit, mixer circuit and receiving two input IF signal in a mixed frequency, resulting in two intermediate frequency signals. An inverter circuit for superheterodyne receiver circuit: two oscillator VCO frequency synthesizer main role is to produce two vibration signal to the receiver demodulation circuit to demodulate the RXI / Q signals. The following Panasonic GD90 cell phone the second local oscillator circuit as an example, the circuit shown in Figure 4-30. Two oscillator VCO circuit (1FVCO) provided by the VCO module components U303, U303 pin 1 is signal output control terminal is 5 feet, feet is the power side. U303 will have a 540MHz circuit of two oscillator signals. The new factory building of cell phone jammer company will hold the foundation stone laying ceremony.
U302's output is divided into two: 39 feet all the way to the U101 as the output signal; another way to 13 feet for the phase-locked loop U301 sampling signal. The signal is divided in U301 and compared with the reference clock signal, the voltage control signal to be 9 feet from the U301 output signal through the resistor R302, R303 and R304 and capacitor C311 and other form of low-pass filter circuit to the U302's 5 feet, by changing the U302 in both ends of the varactor reverse bias, the output frequency to control U302. When the logic circuit by SYNEN, SYNDATA, SYNCLK U301 in three lines to change the divider ratios, U301 9-pin voltage changed, U302's output frequency is also changed, to channel conversion purposes. The cell phone jammer company decides to hold the ribbon –cutting ceremony.
For the second inverter circuit superheterodyne receiver circuit: two oscillator VCO frequency synthesizer main role is to produce two vibration signals sent to the receiver two mixer circuit, mixer circuit and receiving two input IF signal in a mixed frequency, resulting in two intermediate frequency signals. An inverter circuit for superheterodyne receiver circuit: two oscillator VCO frequency synthesizer main role is to produce two vibration signal to the receiver demodulation circuit to demodulate the RXI / Q signals. The following Panasonic GD90 cell phone the second local oscillator circuit as an example, the circuit shown in Figure 4-30. Two oscillator VCO circuit (1FVCO) provided by the VCO module components U303, U303 pin 1 is signal output control terminal is 5 feet, feet is the power side. U303 will have a 540MHz circuit of two oscillator signals. The new factory building of cell phone jammer company will hold the foundation stone laying ceremony.
Details of outsourcing of cell phone jammer needs to be discussed further
Phase detector referred to as PD, PH, or PHD (PhaseDetector). A phase comparator, which changes the phase of VCO oscillating signal is transformed into voltage changes, the phase detector output is a pulsating DC signal, the pulse DC signal low-pass filter (LPF) to filter out high frequency components after control the VCO circuit. The production of china cell phone jammer will be outsourced.
Phase detector is a phase comparator, its input reference signal generated by the VCO phase comparison signal input, two output reflects the phase error signal error voltage. Phase detector is varied, with numbers, but also simulated. Such as dual-port phase detector, PFD, etc.. When using digital phase detector, because of its dual-port output output: In connection with the loop filter on a problem. Usually added in between a double-ended input single-ended output, and can phase detector output phase error signals correctly reflected in the circuit, this circuit is known as the charge pump or the pump circuit. Motorola's GSM cell phone, its transmitter frequency synthesizer basically uses the pump circuit. In the frequency synthesizer, in order to make accurate phase comparison, the phase detector is working in a low state. The company will sign the outsourcing agreement concerning about the manufacture of cell phone jammer.
In the cell phone circuit, the phase detector is usually integrated with the divider is a dedicated chip, the chip is often referred to as PLL (phase locked loop), or integrated in a complex chip (the chip that contains a variety of function of the circuit). Low-pass filter referred to as LPF (LowPassFilter). Low-pass filter in the frequency synthesis loop, also known as the loop filter. It is an RC circuit. In the phase detector and VCO circuit between the basic form of low-pass filter circuit shown in Figure 4-28. Low-pass filter capacitor through the resistor to set the appropriate parameters, so that high frequency components are filtered out. As the phase detector PD output contains not only the DC control signal, and some high-frequency harmonics. These harmonics will affect the VCO circuit. Low-pass filter is necessary to filter out these high frequency components in order to prevent disruption of the VCO circuit. The outsourcing of cell phone jammer is an important link.
Voltage-controlled oscillator referred to as VCO (VoltageControlOscillator). VCO is a "voltage - frequency" converter. It will phase detector PD output voltage difference between signal changes into frequency changes. As the name suggests, VCO circuit is a voltage control circuit. Voltage control is to be completed by a special device to complete, this device is the varactor. The difference between the phase detector output voltage is actually added to the ends of the varactor. When the phase detector output changes, the varactor reverse bias across the diode changes, leading to varactor diode junction capacitance change, VCO oscillation circuit change, VCO output frequency is also changed. In practice, the varactor diode is reverse biased with its linear, controllable range. Details of outsourcing of cell phone jammer needs to be discussed further.
Phase detector is a phase comparator, its input reference signal generated by the VCO phase comparison signal input, two output reflects the phase error signal error voltage. Phase detector is varied, with numbers, but also simulated. Such as dual-port phase detector, PFD, etc.. When using digital phase detector, because of its dual-port output output: In connection with the loop filter on a problem. Usually added in between a double-ended input single-ended output, and can phase detector output phase error signals correctly reflected in the circuit, this circuit is known as the charge pump or the pump circuit. Motorola's GSM cell phone, its transmitter frequency synthesizer basically uses the pump circuit. In the frequency synthesizer, in order to make accurate phase comparison, the phase detector is working in a low state. The company will sign the outsourcing agreement concerning about the manufacture of cell phone jammer.
In the cell phone circuit, the phase detector is usually integrated with the divider is a dedicated chip, the chip is often referred to as PLL (phase locked loop), or integrated in a complex chip (the chip that contains a variety of function of the circuit). Low-pass filter referred to as LPF (LowPassFilter). Low-pass filter in the frequency synthesis loop, also known as the loop filter. It is an RC circuit. In the phase detector and VCO circuit between the basic form of low-pass filter circuit shown in Figure 4-28. Low-pass filter capacitor through the resistor to set the appropriate parameters, so that high frequency components are filtered out. As the phase detector PD output contains not only the DC control signal, and some high-frequency harmonics. These harmonics will affect the VCO circuit. Low-pass filter is necessary to filter out these high frequency components in order to prevent disruption of the VCO circuit. The outsourcing of cell phone jammer is an important link.
Voltage-controlled oscillator referred to as VCO (VoltageControlOscillator). VCO is a "voltage - frequency" converter. It will phase detector PD output voltage difference between signal changes into frequency changes. As the name suggests, VCO circuit is a voltage control circuit. Voltage control is to be completed by a special device to complete, this device is the varactor. The difference between the phase detector output voltage is actually added to the ends of the varactor. When the phase detector output changes, the varactor reverse bias across the diode changes, leading to varactor diode junction capacitance change, VCO oscillation circuit change, VCO output frequency is also changed. In practice, the varactor diode is reverse biased with its linear, controllable range. Details of outsourcing of cell phone jammer needs to be discussed further.
Mobile phone jammer becomes more and more important than before in the educational industry
The good jamming can be effectively provided through using Cellular Phone Jammer.
RS MMC card, MMC card to maintain the same standard interface features, seven signal lines and location of the definition change, simply by adjusting the compression of the packaging technology of the memory interface controller core with the volume. One with 3-pin power supply, data manipulation with another 3-pin serial bus (SPI mode coupled with a needle used to select the chip), is the most simplified interface design. Low-cost serial bus clock frequency up to 20MHz, and can take up to 30 RS MMC address card. RS MMC operating voltage of 2.7 volts to 3.6 volts, write / read current of only 27mA and 23mA, low power consumption. Currently Nokia, Samsung, Siemens has released a new support RS MMC card smart phones, and is expected in the future will be more widely supported. Effective shielding can be supplied for the cell phone signal by using china cell phone jammer.
This is a credit card is only about the size of the pluggable devices can be plugged to a computer or Pocket PC. PC card according to their thickness is divided into Type I, Type II and Type III in three models. Pocket PC is docked to the PC card devices will provide data storage or communication capabilities (eg, telephone line or LAN connection). History: MMC cards are SANDISK by the United States and Germany in 1997, Siemens jointly developed a versatile memory card. Features: MMC card, 7-pin interface, mainly used in digital cameras, mobile phones and some PDA products, relatively expensive. MMC card to a certain extent, a CF card reader to improve the shortcomings of slow and compact dimensions of 32mm × 24mm × 1.4mm, weight of less than 2 grams. Its impact resistance, and can be repeatedly read 300,000 times. mobile phone jammer becomes more and more important than before in the educational industry.
MMC Card 4.0 standard provides a wider bandwidth and faster data transfer rate, and supports dual voltage operation mode. Work in the 52MHz, × 8 bit mode, data transfer rate up to 52MB / s.
Relative to the sd card: SD card because the standard was introduced to keep the equipment on the MMC card compatible, so although the device using the MMC card, SD card can not be used, but the equipment they use SD cards can easily use the MMC card, Pretec this year announced the line MMC4.0 standard speed 2GB MMC memory cards come out, so start close to the MMC card capacity CF card. Prospects: developed by Hitachi RS-MMC Card (Reduced Size MultiMediaCard, smaller-sized multimedia card). Already small in the MMC card, based on the shape of the MMC card is just half the length of more than half the longer MMC card (MMC length of 32mm, RS-MMC length of 18mm). Followed by installation of special adapter can also be used as a MMC card. More in line with today's mobile digital age, smaller, lighter, higher capacity needs. cell phone jammer is easy to hide and carry.
RS MMC card, MMC card to maintain the same standard interface features, seven signal lines and location of the definition change, simply by adjusting the compression of the packaging technology of the memory interface controller core with the volume. One with 3-pin power supply, data manipulation with another 3-pin serial bus (SPI mode coupled with a needle used to select the chip), is the most simplified interface design. Low-cost serial bus clock frequency up to 20MHz, and can take up to 30 RS MMC address card. RS MMC operating voltage of 2.7 volts to 3.6 volts, write / read current of only 27mA and 23mA, low power consumption. Currently Nokia, Samsung, Siemens has released a new support RS MMC card smart phones, and is expected in the future will be more widely supported. Effective shielding can be supplied for the cell phone signal by using china cell phone jammer.
This is a credit card is only about the size of the pluggable devices can be plugged to a computer or Pocket PC. PC card according to their thickness is divided into Type I, Type II and Type III in three models. Pocket PC is docked to the PC card devices will provide data storage or communication capabilities (eg, telephone line or LAN connection). History: MMC cards are SANDISK by the United States and Germany in 1997, Siemens jointly developed a versatile memory card. Features: MMC card, 7-pin interface, mainly used in digital cameras, mobile phones and some PDA products, relatively expensive. MMC card to a certain extent, a CF card reader to improve the shortcomings of slow and compact dimensions of 32mm × 24mm × 1.4mm, weight of less than 2 grams. Its impact resistance, and can be repeatedly read 300,000 times. mobile phone jammer becomes more and more important than before in the educational industry.
MMC Card 4.0 standard provides a wider bandwidth and faster data transfer rate, and supports dual voltage operation mode. Work in the 52MHz, × 8 bit mode, data transfer rate up to 52MB / s.
Relative to the sd card: SD card because the standard was introduced to keep the equipment on the MMC card compatible, so although the device using the MMC card, SD card can not be used, but the equipment they use SD cards can easily use the MMC card, Pretec this year announced the line MMC4.0 standard speed 2GB MMC memory cards come out, so start close to the MMC card capacity CF card. Prospects: developed by Hitachi RS-MMC Card (Reduced Size MultiMediaCard, smaller-sized multimedia card). Already small in the MMC card, based on the shape of the MMC card is just half the length of more than half the longer MMC card (MMC length of 32mm, RS-MMC length of 18mm). Followed by installation of special adapter can also be used as a MMC card. More in line with today's mobile digital age, smaller, lighter, higher capacity needs. cell phone jammer is easy to hide and carry.
Working time of cell phone jammer
Main technical indices of cell phone jammer:
input voltage of cell phone jammer: AC 220-240V, 45～55Hz;
working temperature range of cell phone jammer: -35～+45℃;
working humidity range of cell phone jammer: 5～95%;
working time of cell phone jammer: stably working for a long time if switched on for a long time;
effective shielding distance of cell phone jammer: 5-60m;
weight of cell phone jammer: no more than 11;
size of cell phone jammer: 20*17*30 CM;
weight and size are the approximation.
Applicable places: petrol station, oil depot, oil field, gas station and so on.
Second-generation cell phone jammer specific to examination room
input voltage of cell phone jammer: AC 220-240V, 45～55Hz;
working temperature range of cell phone jammer: -35～+45℃;
working humidity range of cell phone jammer: 5～95%;
working time of cell phone jammer: stably working for a long time if switched on for a long time;
effective shielding distance of cell phone jammer: 5-60m;
weight of cell phone jammer: no more than 11;
size of cell phone jammer: 20*17*30 CM;
weight and size are the approximation.
Applicable places: petrol station, oil depot, oil field, gas station and so on.
Second-generation cell phone jammer specific to examination room
This kind of china cell phone jammer has 5 antennae
Installation of cell phone jammer adopts wall-mounted installation.
Consumers Association who do remind the public to buy mobile phones should note the following:
- Check whether the body of the screw tighten the scene, if any will have to be careful, because this mobile phone may be two or repairing machines.
- To view the total call time, such as displaying more than 10 minutes, the phone may be two or repairing machines.
- View the fuselage serial number (IMEI code) and head back and posted the serial number on the packaging are consistent with the three serial numbers as indicating that the phone is the original site of the authentic product. The jamming of cell phone jammeris 40-80m.
- See if there is network access license, if not then this phone is certainly parallel; such as network access license is a fake, they should immediately negotiate with the operator, or to report to the business sector.
- Check purchase invoices on the cover of the chapter and the "three guarantees" certificate on the cover of the chapter and payable on the invoice are consistent with the official seal, and take good care of invoices and the "three guarantees" certificate.
Buy counterfeit battery exchange
Phone "three guarantees" of Article 5 clearly states, the seller should check the host body cell phone number (IMEI serial number), Jinwangbiaozhi, accessories factory serial number (batch number), product trademarks and models, which in fact provide consumers against smuggling, piracy and counterfeit mobile phone batteries weapon. "Three Guarantees" set up specifically for the consumer protection provisions of a cell phone battery (14), provides that "three guarantees" period, two batteries, cell phone accessories can not replace the normal use, the seller should be free consumer return. This kind of china cell phone jammer has 5 antennae.
Regulations also specifically suggested that if consumers lose the invoice and the "three guarantees" certificate, and can not provide valid evidence, but the number is displayed in accordance with the host body projected release date is still "three guarantees" period, and should be the date of manufacture The first 90 days after the "three guarantees" period start date, sellers, repairers, producers should be in accordance with "three guarantees" is responsible for free repair.
Consumers Association who do remind the public to buy mobile phones should note the following:
- Check whether the body of the screw tighten the scene, if any will have to be careful, because this mobile phone may be two or repairing machines.
- To view the total call time, such as displaying more than 10 minutes, the phone may be two or repairing machines.
- View the fuselage serial number (IMEI code) and head back and posted the serial number on the packaging are consistent with the three serial numbers as indicating that the phone is the original site of the authentic product. The jamming of cell phone jammeris 40-80m.
- See if there is network access license, if not then this phone is certainly parallel; such as network access license is a fake, they should immediately negotiate with the operator, or to report to the business sector.
- Check purchase invoices on the cover of the chapter and the "three guarantees" certificate on the cover of the chapter and payable on the invoice are consistent with the official seal, and take good care of invoices and the "three guarantees" certificate.
Buy counterfeit battery exchange
Phone "three guarantees" of Article 5 clearly states, the seller should check the host body cell phone number (IMEI serial number), Jinwangbiaozhi, accessories factory serial number (batch number), product trademarks and models, which in fact provide consumers against smuggling, piracy and counterfeit mobile phone batteries weapon. "Three Guarantees" set up specifically for the consumer protection provisions of a cell phone battery (14), provides that "three guarantees" period, two batteries, cell phone accessories can not replace the normal use, the seller should be free consumer return. This kind of china cell phone jammer has 5 antennae.
Regulations also specifically suggested that if consumers lose the invoice and the "three guarantees" certificate, and can not provide valid evidence, but the number is displayed in accordance with the host body projected release date is still "three guarantees" period, and should be the date of manufacture The first 90 days after the "three guarantees" period start date, sellers, repairers, producers should be in accordance with "three guarantees" is responsible for free repair.
Product introduction of cell phone jammer
Meeting secrecy cell phone jammer
Brand: cell phone jammer; model: JN101A;
covering radius of cell phone jammer: 25-30（m）
Meeting secrecy cell phone jammer
Product introduction of cell phone jammer
The cell phone jammer specifically designed, developed and manufactured by our company adopts reliable information protection technology and electronic devices of high performance through repeated experiment and testing according to communication principle of the mobile phone.
The cell phone jammer (normally-open and enhanced type) prevent communication between mobile phone and base station through constantly sending channel frequency of the mobile phone to ensure the safety and confidentiality at site.
Brand: cell phone jammer; model: JN101A;
covering radius of cell phone jammer: 25-30（m）
Meeting secrecy cell phone jammer
Product introduction of cell phone jammer
The cell phone jammer specifically designed, developed and manufactured by our company adopts reliable information protection technology and electronic devices of high performance through repeated experiment and testing according to communication principle of the mobile phone.
The cell phone jammer (normally-open and enhanced type) prevent communication between mobile phone and base station through constantly sending channel frequency of the mobile phone to ensure the safety and confidentiality at site.
Cell phone jammer can automatically run after connecting the antenna and switching on
Machine purchased fourteen days Note: fourteen days of purchase machines and new machines the difference is usually 100-200 dollars, do not rule out some distribution will take fourteen days on the machine when the new machines for sale, purchase must be careful in view; not All phones have fourteen days machines, machines generally have fourteen days following emergence of the specific model: Nokia N-GAGE (details of the phone), Dopod 686, XDA, SIEMENS SX65, Dopod 515 (SPV) Sony Ericsson T610, Panasonic GD87, NEC C616 (the mobile phone details), C313, Motorola a835, a920 and other models. Hong Kong Line: Hong Kong Bank is licensed in Hong Kong, and China's licensed the same. Quality is better than the mainland. Is that many of the traditional to rinse, personal feel that there is damage to the machine. In fact, this is a real parallel. To the European version of the definition should be like this, in the A to the production of mobile phones to be sent to B, the middle was the tariff evasion through some channels into the Chinese domestic market for sales of mobile phones. So, Europe is a regional version of the mainstream. cell phone jammer is the environmentally-friendly product.
Currently used within the industry will have been handled through the approval of the CTA and standard network products, 3C is not labeled for use to other CTA's products, to reduce the cost of the product to market, time to market the product in advance of an act. China's mobile phone production license is access to the system, so only those with mobile phone companies to license production and sales of mobile phones in China, some have production capabilities, the companies want to enter the mobile phone industry, without the production license issued by the Chinese government before, production licenses have been obtained only with the name of the company qualified for CTA and other government, then enter the market, such behavior is known as the OEM industry. cell phone jammer can automatically run after connecting the antenna and switching on.
Roasted seeds and nuts: the industry as a diversion, according to the information gap to do the sale of mobile phone behavior changing products: for the region to get the non-restricted products to sell in the sales area referred to as behavior changing products. National package: industry exclusive distribution to a nationwide mobile phone company was called for the national package. Provincial package: an exclusive range of industries within the provincial distribution company to be called a mobile phone package for the province. Nowadays more and more people like their phones to help "thin", in the end what is "thin"? The so-called "downsizing" is redundant files to the phone to save phone memory by deleting the entire process. The most common method is the "Brush." The slow-start circuit design of cell phone jammercan effectively avoid the sparking phenomenon when switching on cell phone jammer.
Currently used within the industry will have been handled through the approval of the CTA and standard network products, 3C is not labeled for use to other CTA's products, to reduce the cost of the product to market, time to market the product in advance of an act. China's mobile phone production license is access to the system, so only those with mobile phone companies to license production and sales of mobile phones in China, some have production capabilities, the companies want to enter the mobile phone industry, without the production license issued by the Chinese government before, production licenses have been obtained only with the name of the company qualified for CTA and other government, then enter the market, such behavior is known as the OEM industry. cell phone jammer can automatically run after connecting the antenna and switching on.
Roasted seeds and nuts: the industry as a diversion, according to the information gap to do the sale of mobile phone behavior changing products: for the region to get the non-restricted products to sell in the sales area referred to as behavior changing products. National package: industry exclusive distribution to a nationwide mobile phone company was called for the national package. Provincial package: an exclusive range of industries within the provincial distribution company to be called a mobile phone package for the province. Nowadays more and more people like their phones to help "thin", in the end what is "thin"? The so-called "downsizing" is redundant files to the phone to save phone memory by deleting the entire process. The most common method is the "Brush." The slow-start circuit design of cell phone jammercan effectively avoid the sparking phenomenon when switching on cell phone jammer.
Cell phone jammerincludes the car adapter and charger
China's mobile phone retailers, although some companies establish a lack of "professional services" by the idea, but do not actually a fully professional operation and management of shops, professional service. Our so-called professional services, not the pre-sale, the sale of the surface such a simple service, but an inside-out, three-dimensional 360-degree multi-service system, by extending the business value chain to achieve profitability. For example: by the customer to buy mobile phones - mobile phones out of service --- --- back to the phone. Most mobile phone shops must only be "problem-based services", "Notice of-service", that customer will come after the deal with the problem, no problem, there is no service. Which mobile phone retailers expect customers updated, replaced, recycling? Which businesses will go active when the customer does not care about the problem customers? These are a deeper level of service. china cell phone jammer looks like the cigarette packet so that it is not easy to be detected.
Of course, in addition to the above three points of analysis, in the shallow traditional philosophy, we can not ignore the profitable mobile phone retailers should have the objective and subjective factors. To sum up there are three aspects. Are location, promotion, management. As the saying goes, shop difference an inch, poor business ten feet. Shop is a good flow, financial flow, information flow and exchange of the fastest, most living areas. According to the traditional experience, a north-south commercial street off, too busy south side of the face to the north; things off, to be busy over the East side West side; and a traditional commercial street, not two of the most popular nor the middle, but close to half of the half and then, almost in line with the law of the golden section (1:0.618) is. Of course, this is not absolute, in the modern business environment under the guidance of the design of advanced concepts, from human nature, psychology, habits and other factors into account, are often able to create a monk Pu home stores miracle. cell phone jammerincludes the car adapter and charger.
Today's society is information society, advertising has become essential to conventional weapons. Store signs to do, shop windows to do, do bags, price tags do, leaflets do, roll up exhibition stand has to be done, the head of the reach of all advertising, eye-catching and easy to remember the Scriptures. In the same market, the retail store outside of the extent and effects of eye-catching advertising to become an important factor affecting the customer to buy. In addition, full use of the media industry, can do the hard image advertising, public information also can be soft. Brains store or business, there is always a year advertising plan, or man-made spectacle, hot selling, news sites; or by making advantage of the situation, a market customer focus. cell phone jammer can be recharged easily.
Of course, in addition to the above three points of analysis, in the shallow traditional philosophy, we can not ignore the profitable mobile phone retailers should have the objective and subjective factors. To sum up there are three aspects. Are location, promotion, management. As the saying goes, shop difference an inch, poor business ten feet. Shop is a good flow, financial flow, information flow and exchange of the fastest, most living areas. According to the traditional experience, a north-south commercial street off, too busy south side of the face to the north; things off, to be busy over the East side West side; and a traditional commercial street, not two of the most popular nor the middle, but close to half of the half and then, almost in line with the law of the golden section (1:0.618) is. Of course, this is not absolute, in the modern business environment under the guidance of the design of advanced concepts, from human nature, psychology, habits and other factors into account, are often able to create a monk Pu home stores miracle. cell phone jammerincludes the car adapter and charger.
Today's society is information society, advertising has become essential to conventional weapons. Store signs to do, shop windows to do, do bags, price tags do, leaflets do, roll up exhibition stand has to be done, the head of the reach of all advertising, eye-catching and easy to remember the Scriptures. In the same market, the retail store outside of the extent and effects of eye-catching advertising to become an important factor affecting the customer to buy. In addition, full use of the media industry, can do the hard image advertising, public information also can be soft. Brains store or business, there is always a year advertising plan, or man-made spectacle, hot selling, news sites; or by making advantage of the situation, a market customer focus. cell phone jammer can be recharged easily.
The total effective emission power of the single cell phone jammer is 10W
File Shredder feature. Provide users with a secure delete files. Computer Lock feature. When users need to temporarily leave their computer, just unplug the hardware device, the computer automatically enter the locked state. Only re-insert the hardware equipment, computer to unlock state. Resource control. This feature allows the user to freely control their own computers can use what resources, what resources can not be used. Control of the resources currently available include: port, device, registry, etc. The working power supply of china cell phone jammer is AC 220V/3W."Zhihua secure login and file protection system V1.20" is based on the PKI / CA system, using smart card technology to improve the local stand-alone computer and network security applications, portable security products. It offers systems, folders, files, data protection and network to provide multi-level control, with monitoring and computer audit functions to run, fully protect the network environment, computer security, to prevent outsiders or insiders of computer information through the local equipment attack the system. This product has received a certificate of classified information system product testing, quality, and reliable. This product has the following features: a full range of security management. Hardware randomly generated key. Dynamic loading virtual hard disk. Seamless integration with Windows systems. The total effective emission power of the single cell phone jammer is 10W. In recent years, state, government, business e-government, e-commerce, OA office systems more widely, together with e-mail transmission is becoming increasingly popular, which makes the different regions and between different departments in clear text form of all important data in the circulation and transfer process, it is easy to be stolen, copied, intercepted, altered, and leakage. Meanwhile, online viruses (such as: Trojan virus) transmission also bring great computer systems and data threats, data protection, especially information security encryption has become our urgent problems to be resolved. How to protect both the security of important data flow, but also to maximize use of existing resources, this is an urgent need to solve technical problems. The mean output of every antenna of mobile phone jammer is 1.0-2.5W.
Cell phone jammer has the red light which indicates cell phone jammer is not working
cell phone jammer has the green light which indicates cell phone jammer is working.
SD card is a Secure Digital Card - Secure Digital card, by the Japanese Matsushita, Toshiba and U.S. SanDISK company in August 1999 made jointly developed. Although the SD card is based on development of MMC card, but still basically two different products, but take into account in the design of compatibility issues, so in most cases, these two products to exchange, is a large capacity, performance, and enhance safety and other features of multi-memory card. MMC card more than a copyright protection signal for data authentication (SDMI specifications). Are used for MP3, digital cameras, electronic books, mini computers, AV equipment. Sizes slightly thicker than MMC card 32mm × 24mm × 2.1mm, capacity will have a large lot, just listing a single card when the SD card capacity of 8MB-64MB range, transmission speed per second, 2MB, but by early 2002 single card capacity has up to 512MB, to enhance data transfer rate to 10MB / s, so that some of the larger file transfer has certain advantages. Also this card is read and write speeds faster than MMC card 4 times, up to 2MB / sec. cell phone jammer has the red light which indicates cell phone jammer is not working.
At the same time compatible with the MMC card, SD card, MMC card socket support most. From a performance point of view, the two biggest difference is that SD cards emphasize data security, you can set a specific software program or data card to use permissions to prevent users from indiscriminately copying and damage the interests of the owner. Of course, for the average user, this feature useless, on the contrary the system and the encrypted data will occupy 900K memory card capacity, in addition to SD and MMC cards are using an integrated solid media, no moving parts, so nothing to worry about mechanical damage caused by movement of data loss. sd card more rugged, I like Sharp's license is to use the sd card phone. Most digital cameras is now very mainstream. china cell phone jammer is of the small and light design.
Memory Stick is Sony's launch in 1997, mobile storage, because of its shape like a chewing gum, also known as "chewing gum" storage card. Currently only the Sony for its support. Different from other FlashMemory storage card, Memory Stick standard non-disclosure, required to sign the agreement before use. Memory Stick has a write-protect switch, includes controller, a 10-pin connector for serial data bus, the maximum frequency up to 20MHz, the voltage of 2.7 volts to 3.6 volts, the current average of 45mA. cell phone jammer has the on-off button to control cell phone jammer .
SD card is a Secure Digital Card - Secure Digital card, by the Japanese Matsushita, Toshiba and U.S. SanDISK company in August 1999 made jointly developed. Although the SD card is based on development of MMC card, but still basically two different products, but take into account in the design of compatibility issues, so in most cases, these two products to exchange, is a large capacity, performance, and enhance safety and other features of multi-memory card. MMC card more than a copyright protection signal for data authentication (SDMI specifications). Are used for MP3, digital cameras, electronic books, mini computers, AV equipment. Sizes slightly thicker than MMC card 32mm × 24mm × 2.1mm, capacity will have a large lot, just listing a single card when the SD card capacity of 8MB-64MB range, transmission speed per second, 2MB, but by early 2002 single card capacity has up to 512MB, to enhance data transfer rate to 10MB / s, so that some of the larger file transfer has certain advantages. Also this card is read and write speeds faster than MMC card 4 times, up to 2MB / sec. cell phone jammer has the red light which indicates cell phone jammer is not working.
At the same time compatible with the MMC card, SD card, MMC card socket support most. From a performance point of view, the two biggest difference is that SD cards emphasize data security, you can set a specific software program or data card to use permissions to prevent users from indiscriminately copying and damage the interests of the owner. Of course, for the average user, this feature useless, on the contrary the system and the encrypted data will occupy 900K memory card capacity, in addition to SD and MMC cards are using an integrated solid media, no moving parts, so nothing to worry about mechanical damage caused by movement of data loss. sd card more rugged, I like Sharp's license is to use the sd card phone. Most digital cameras is now very mainstream. china cell phone jammer is of the small and light design.
Memory Stick is Sony's launch in 1997, mobile storage, because of its shape like a chewing gum, also known as "chewing gum" storage card. Currently only the Sony for its support. Different from other FlashMemory storage card, Memory Stick standard non-disclosure, required to sign the agreement before use. Memory Stick has a write-protect switch, includes controller, a 10-pin connector for serial data bus, the maximum frequency up to 20MHz, the voltage of 2.7 volts to 3.6 volts, the current average of 45mA. cell phone jammer has the on-off button to control cell phone jammer .
The place of high voltage is not good for mobile phone jammer
MMC card on the market now are more brands such as sandisk, kingmax, TEC, PQI, PDI, DEC, Nplus, etc., and not just look at the quality of the brand, because there is poor with a brand goods, there are excellent products. The key is high compatibility, MMC PQI where is the cheapest price, so now use the PQI brand products are more, of course, also more fakes on the market now PQI MMC card, there are two, one is the generation of low-speed blue dolphin card, up to this fake blue card, we recommend you not to buy. The second is the Orange's second-generation cards, if you have to buy the PQI, recommended to buy orange card. There are also several other good brands, such as EagleTec, there kingMAX, SanDisk. Mmc card brand on our forums for less mainstream and the mainstream market. Cellular Phone Jammer is of little noise.
MMC card capacity options: from the perspective of practical use, MMC is mainly used for storage applications, images, movies, songs, etc., preferably with more than 256M. 7710 128 gift card is obviously not enough, with a lot of brothers are 1g, in fact, I think the 1g's enough, I use the 256m, and install software, install a few songs, put a few of the small firm owner e-book, you can also install a movie the other. In the time of purchase, be sure to see if it can, of course, only "can" or does not work, but also to see if compatible. The best time to buy a card with a personal machine to try to see whether the delay in mp3 player and so on. Finally, take a look at the MMC has no scratches above the contact point, usually the new card is not. china cell phone jammer is a quiet equipment which can be reliably used.
Needless to say, we can feel, Symbian mobile phone operating system is now the most widely used areas of the operating system, and has quite a different user interface, which is often said that the Series. Interface on Symbian OS, there are always many people confused about the rules of their division, then we introduce a simple version of the typical characteristics of each system. Let's clear a concept: whether Series60, Series80, Series90 or UIQ, they are developed based on the Symbian platform interface, and then each according to some hardware features to make that distinction. It is rumored Nokia may launch Series50 and Series100 interface, but can not determine its authenticity. The place of high voltage is not good for mobile phone jammer.
Series60 Symbian smart phones in the most widely used version of the system. Series60 system is also divided into the Symbian 6.0 OS Series60, Symbian 7.0 OS Series60 and Symbian 8.0 OS Series60 three versions. Series60 difference factor is the most intuitive screen resolution, Series60 supports a resolution of 176 * 208 pixels, but will also support future Series60 240 * 320 pixels, 352 * 416 pixels and so on. Series60 interface is the largest third-party software or games Interface, will naturally become the Symbian smartphone operating system used most frequently Series. Phone models using Series60 interface, not list them here, just Nokia's smart phones, there is a considerable number of used Series60 interface. The location of high magnetism degree may do harm to cell phone jammer.
Identification Series80 interface easiest way is to see whether the phone supports QWERTY KEYBROAD, such as the Nokia high-end series 9210,9300 or even 9500, are based on the QWERTY KEYBROAD's. The Series80 screen resolution for more special 640 * 200 pixels. Series90 Symbian platform is the youngest interface, support for Nokia Series90 the 7700 and 7710, only two phones. Included is a packing list of cell phone jammer.
The attachment of china cell phone jammer is added to the contract
The so-called 3G, in fact, it's all called the 3rd Generation, Chinese meaning is the third generation digital communications. In 1995 came the first generation of digital mobile phones can only make voice calls; 1996 and 1997 appeared the second generation digital mobile phones have increased capabilities to receive data, such as receiving e-mail or web page; the third generation of the main difference with the previous two generations is in voice and data transmission speed of the upgrade, 3G is the wireless communications and the Internet and other multimedia communications with a new generation of mobile communication systems. It can handle images, voice, video streaming and other forms of media, including web browsing, conference calls, e-commerce and other information services. The two parties decides to sign the contract of cell phone jammer next week.
To provide this service, wireless network must be able to support different data transfer speed, which means that in any environment can support at least 2Mbps (megabytes / second), 384kbps (kilobytes / second) and 144kbps transmission speed. 2G network bandwidth is 9.6Kpbs. 2.5G to 56Kpbs. 3G will have a wider bandwidth, the transmission speeds of up to 100-300Kbps, not only can transmit voice, but also transmit data to provide fast, convenient wireless applications. International Telecommunication Union (ITU) as early as May 2000 that identified WCDMA, CDMA200 and TD-SCDMA. Management representative of cell phone jammer will come to the company next month.
Three mainstream 3G standards, 3G technology written guidance document "2000 International Mobile Communications Plan" (referred to as IMT-2000).Relative to the first generation analogue phones (1G) and second-generation GSM, TDMA digital mobile phones, etc. (2G), 3G communication the name of the variety, the ITU defined as "IMT-2000" (International Mobile Telephone 2000) standards, European Telecommunications giants claimed it as "UMTS" (Universal Mobile Telecommunications System), which means Universal Mobile Telecommunications System. Standard of sustainable development, embodied in the 3GPP UMTS standard four versions: R99, R4, R5, R6. Form a large and relatively independent of the internal standards. WCDMA is one of the earliest and the most perfect choice for air interface, and for Europe, Asia and the Americas, 3G operators are widely used. The technical protocol of cell phone jammer is well prepared for signature.
WCDMA: the Wide band CDMA, meaning Wideband Code Division Multiple Access, its supporters mainly European-based GSM system vendors, including the U.S. and Europe, Ericsson, Alcatel, Nokia, Lucent, Nortel, and Japan's NTT, Fujitsu, Sharp and other manufacturers. The system can be set up in the existing GSM network, for system providers, and facilitate the transition, while the GSM system is quite popular in Asia for the acceptance of this new technology will be relatively high. Therefore, WCDMA has inherent market advantage. (Japanese mobile communications giant NTT DoCoMo was October 1, 2001 opening of the world's first standards-based 3G WCDMA network services now, Asia has become the fastest growing 3G area, followed by Europe, the United States as less enthusiastic and far behind in the technical preparation.) The attachment of china cell phone jammer is added to the contract.
WCDMA: WCDMA full name is (Wideband Code Division Multiple Access), the Chinese translation for "wide band code division multiple access ", WCDMA from Europe and Japan, the integration of several technologies it uses MC FDD duplex mode, and the GSM network has a good compatibility and interoperability as a new technology, it technical maturity in less than CDMA2000, but its advantage lies in the widespread adoption of GSM upgrade to its convenience, so much time recently also major manufacturers of all ages. WCDMA latest Asynchronous Transfer Mode (ATM) cell micro- transfer protocol, to allow for more transmission lines in a voice call, the call number from the current 30 to 300 lines in densely populated areas will not be prone to clogging. The two parties revised some clauses in the contract of cell phone jammer .
To provide this service, wireless network must be able to support different data transfer speed, which means that in any environment can support at least 2Mbps (megabytes / second), 384kbps (kilobytes / second) and 144kbps transmission speed. 2G network bandwidth is 9.6Kpbs. 2.5G to 56Kpbs. 3G will have a wider bandwidth, the transmission speeds of up to 100-300Kbps, not only can transmit voice, but also transmit data to provide fast, convenient wireless applications. International Telecommunication Union (ITU) as early as May 2000 that identified WCDMA, CDMA200 and TD-SCDMA. Management representative of cell phone jammer will come to the company next month.
Three mainstream 3G standards, 3G technology written guidance document "2000 International Mobile Communications Plan" (referred to as IMT-2000).Relative to the first generation analogue phones (1G) and second-generation GSM, TDMA digital mobile phones, etc. (2G), 3G communication the name of the variety, the ITU defined as "IMT-2000" (International Mobile Telephone 2000) standards, European Telecommunications giants claimed it as "UMTS" (Universal Mobile Telecommunications System), which means Universal Mobile Telecommunications System. Standard of sustainable development, embodied in the 3GPP UMTS standard four versions: R99, R4, R5, R6. Form a large and relatively independent of the internal standards. WCDMA is one of the earliest and the most perfect choice for air interface, and for Europe, Asia and the Americas, 3G operators are widely used. The technical protocol of cell phone jammer is well prepared for signature.
WCDMA: the Wide band CDMA, meaning Wideband Code Division Multiple Access, its supporters mainly European-based GSM system vendors, including the U.S. and Europe, Ericsson, Alcatel, Nokia, Lucent, Nortel, and Japan's NTT, Fujitsu, Sharp and other manufacturers. The system can be set up in the existing GSM network, for system providers, and facilitate the transition, while the GSM system is quite popular in Asia for the acceptance of this new technology will be relatively high. Therefore, WCDMA has inherent market advantage. (Japanese mobile communications giant NTT DoCoMo was October 1, 2001 opening of the world's first standards-based 3G WCDMA network services now, Asia has become the fastest growing 3G area, followed by Europe, the United States as less enthusiastic and far behind in the technical preparation.) The attachment of china cell phone jammer is added to the contract.
WCDMA: WCDMA full name is (Wideband Code Division Multiple Access), the Chinese translation for "wide band code division multiple access ", WCDMA from Europe and Japan, the integration of several technologies it uses MC FDD duplex mode, and the GSM network has a good compatibility and interoperability as a new technology, it technical maturity in less than CDMA2000, but its advantage lies in the widespread adoption of GSM upgrade to its convenience, so much time recently also major manufacturers of all ages. WCDMA latest Asynchronous Transfer Mode (ATM) cell micro- transfer protocol, to allow for more transmission lines in a voice call, the call number from the current 30 to 300 lines in densely populated areas will not be prone to clogging. The two parties revised some clauses in the contract of cell phone jammer .
Dominate the cell phone market is the mainstay
First, the history of China's cell phone channel model
China's cell phone development and marketing channel mode and the popularity of cell phone competition in the market are closely related, according to the patterns of development and mainstream channels of different dealers, can be roughly divided into three stages:
1 monopoly of China Telecom, cell phone sales market stage
China's cell phone market in the formation and development at the beginning, on the one hand because of higher prices of cell phones, the penetration rate is low, and users are concentrated in cities; the other hand, because the mobile communications market by China Telecom monopoly, so this period by China Telecom underwriting period. The only place to sell cell phone business hall of China Telecom and the subsequent emergence of some small shops, which are mainly based cell phone operating parallel. During this period in terms of distribution or from the retail perspective, China Telecom dominates the market, China Telecom underwriting in the state, the true sense of the marketing channel system has not been formed. More and more people, especially the young people, choose buy cell phone jammer on the internet.
2 a national distributor sales channel phase control
This phase change in the context of mobile marketing channels, opening up of China Telecom's cell phone sales, professional cell phone retailers appeared, and quickly in large-scale emergence of 12 cities nationwide. At this stage, the formation of a complete distribution system evolved, a national distributor of cell phone sales channels control, dominate the cell phone market is the mainstay.
3. Coexistence of multiple distribution channels mode phase
It is more convenient to buy cell phone jammer the internet for it can save a lot of time and energy. This phase change channel model derived from the rapid development of domestic cell phone manufacturers, from 2002 because of domestic cell phone manufacturers to enter the market, without the support of the national general agent distribution system to turn to the provincial level to break down foreign brand of national distribution system monopoly. With the increased market share of domestic brands, distributor's status began to decline nationwide, in addition, the stage is another important feature of a variety of sales models and sales channels rise, while the number of terminals and sales of retailers, there have been large-scale rate of decline.
China's cell phone development and marketing channel mode and the popularity of cell phone competition in the market are closely related, according to the patterns of development and mainstream channels of different dealers, can be roughly divided into three stages:
1 monopoly of China Telecom, cell phone sales market stage
China's cell phone market in the formation and development at the beginning, on the one hand because of higher prices of cell phones, the penetration rate is low, and users are concentrated in cities; the other hand, because the mobile communications market by China Telecom monopoly, so this period by China Telecom underwriting period. The only place to sell cell phone business hall of China Telecom and the subsequent emergence of some small shops, which are mainly based cell phone operating parallel. During this period in terms of distribution or from the retail perspective, China Telecom dominates the market, China Telecom underwriting in the state, the true sense of the marketing channel system has not been formed. More and more people, especially the young people, choose buy cell phone jammer on the internet.
2 a national distributor sales channel phase control
This phase change in the context of mobile marketing channels, opening up of China Telecom's cell phone sales, professional cell phone retailers appeared, and quickly in large-scale emergence of 12 cities nationwide. At this stage, the formation of a complete distribution system evolved, a national distributor of cell phone sales channels control, dominate the cell phone market is the mainstay.
3. Coexistence of multiple distribution channels mode phase
It is more convenient to buy cell phone jammer the internet for it can save a lot of time and energy. This phase change channel model derived from the rapid development of domestic cell phone manufacturers, from 2002 because of domestic cell phone manufacturers to enter the market, without the support of the national general agent distribution system to turn to the provincial level to break down foreign brand of national distribution system monopoly. With the increased market share of domestic brands, distributor's status began to decline nationwide, in addition, the stage is another important feature of a variety of sales models and sales channels rise, while the number of terminals and sales of retailers, there have been large-scale rate of decline.
Using high-power china cell phone jammer-based
Install only the traditional programs and jammers horse wins the prison phone shielding advantages and disadvantages of intelligent management systems comparison.
A prison or a regulatory region for the cell phone signal jammers, whether it is a low-power jammers cellular distribution methods, or using high-power china cell phone jammer-based, low-power auxiliary shielding blind supplement program, the entire area will be monitored will be installed on a number of cell phone signal jammers point, for which a number of shield points, power-up test is not installed to achieve the shielding effect can be counted as successful completion of the project, how to ensure that the number of cell phone signal jammers normal and stable point in the future operation of the entire cell phone signal jammers is the key to the project.
For cell phone jammer shielding in a prison or supervising area, no matter whether the cellular distribution of small-power cell phone jammer, or the program of mainly using large-power cell phone jammer and complementarily using small-power cell phone jammer to supplement the dead zone is adopted, several cell phone signal shielding positions will be installed in the whole prison zone. Currently prison simply install cell phone signal jammers only drawback.
Uniform opening and closing is not convenient.
Cell phone signal jammers too many units, especially after monitoring the implementation of shielding the region after more than Louchuang are difficult to centralized open, close; even through the unified arrangement of the power cord, the need for individual responsibility and time on and off.
Unable to obtain shielding the working conditions and fault or not.
All cell phone signal jammers after the opening, management can not be immediately learned what point of the shielding device is working properly.
No energy saving, is not conducive to equipment maintenance.
General all the jammers at the opening of the state for many years, is not conducive to energy saving, environmentally unfriendly, is not conducive to maintenance of equipment, reduced equipment life; (such as industrial areas, canteen, warehouse night are no state, without these location of the mobile phone jammer switched on 24 hours a day). If there are too many sets of cell phone jammer, especially after many buildings in the prison implement shielding, it is harder to switch on or off centrally or uniformly.
Convenient grouping control or point control.
Not accurate for any group or point of time switch control.
Not prevent the phenomenon of vandalism jammers.
A prison or a regulatory region for the cell phone signal jammers, whether it is a low-power jammers cellular distribution methods, or using high-power china cell phone jammer-based, low-power auxiliary shielding blind supplement program, the entire area will be monitored will be installed on a number of cell phone signal jammers point, for which a number of shield points, power-up test is not installed to achieve the shielding effect can be counted as successful completion of the project, how to ensure that the number of cell phone signal jammers normal and stable point in the future operation of the entire cell phone signal jammers is the key to the project.
For cell phone jammer shielding in a prison or supervising area, no matter whether the cellular distribution of small-power cell phone jammer, or the program of mainly using large-power cell phone jammer and complementarily using small-power cell phone jammer to supplement the dead zone is adopted, several cell phone signal shielding positions will be installed in the whole prison zone. Currently prison simply install cell phone signal jammers only drawback.
Uniform opening and closing is not convenient.
Cell phone signal jammers too many units, especially after monitoring the implementation of shielding the region after more than Louchuang are difficult to centralized open, close; even through the unified arrangement of the power cord, the need for individual responsibility and time on and off.
Unable to obtain shielding the working conditions and fault or not.
All cell phone signal jammers after the opening, management can not be immediately learned what point of the shielding device is working properly.
No energy saving, is not conducive to equipment maintenance.
General all the jammers at the opening of the state for many years, is not conducive to energy saving, environmentally unfriendly, is not conducive to maintenance of equipment, reduced equipment life; (such as industrial areas, canteen, warehouse night are no state, without these location of the mobile phone jammer switched on 24 hours a day). If there are too many sets of cell phone jammer, especially after many buildings in the prison implement shielding, it is harder to switch on or off centrally or uniformly.
Convenient grouping control or point control.
Not accurate for any group or point of time switch control.
Not prevent the phenomenon of vandalism jammers.
Cell phone jammer is of small power and little electric energy consumption
Cellular Phone Jammer only makes the mobile phone can not send or receive the telecommunication signal when entering the shielding area. Finding The result: when the directional antenna direction roughly aligned Tobacco Monopoly Bureau (linear distance of about 10 meters), the antenna about 30 degrees angle search swing around, the signal level on the slightly larger (about-75dBm); beat sound signals Some are also a little sharp, just in the direction of interference within the coverage area. After preliminary analysis, taking into account the City by the Road open terrain, good conditions to facilitate the monitoring, we quickly start monitoring vehicle, while monitoring side entered the train station, this time, the monitoring system displays the signal strength gradually increased, the level is-65dBm or so.
cell phone jammer is of small power and little electric energy consumption. Repeated measurements by multi-point foot compared to the cross and positioning to determine the source of interference in the basic Weibin district government hospital, we use field approximation, while walking more while finding, tracking the direction of the strongest signal search forward, when close to 2 floor, the signal strength increased significantly, Building 2, the line to the conference room near the line pointing to the meeting room the day when the signal strength to rise to-50dBm or more on foot, and beat out the sharp tone of the signal, interference in this conference room. By asking the district government official to know: This conference is being held for security, prohibit the use of mobile phones during the meeting, so in the conference room fitted with two cell phone signal jammers. 11:50, we are the cell phone signal jammers were examined, and its power is divided into large and small second gear, the current set of high-power profile.
cell phone jammer will do no harm to the human and various electronic equipments. Four-channel models can be effectively shielded CDMA, GSM, DCS, PHS mobile signal, shielded Bandwidth CDMA: 869MHz-894MHz GSM: 925MHz-960 MHz DCS: 1805MHz-1880MHz PHS: 1900MHz-1990 MHz. We think: The cell phone signal jammers transmit power, shielding range for standard wide, the base station is interfering Netcom causes of poor communication. After shutting down the experiment, the interference signal disappears, reflecting the base station to monitor the engine room back to normal communications. I stood fast and accurate investigation of the radio manager level, to establish the station in the middle unit and the local people get a good response.
Case: May 2003, Baoji City, Town Qianyang Cui, Town Longxian solid mobile users call in the area there is a single-pass phenomenon. According to different sensitiveness situations of different cell phones, cell phone jammer can make various mobile phones in the shielding range lose the signal within several seconds after it is turned on to shield various mobile phones from sending and receiving the signal.
Analysis: From the CDMA base stations and GSM base station location analysis, the main factors are: the electromagnetic environment requirements. Any type of radio (stations) should leave the man-made radio noise sources (such as substations, electric railways, airports, railway stations, welding, heat sealing machine, X-ray machines, etc.) far enough; radio interference protection. More base stations set up at the same location in the case, to consider the same radio signal between the radiation may be directly or indirectly interfere with. The distance between the base station meets the requirements of protection, particularly the use of similar frequency band, interference must be tested and
cell phone jammer is of small power and little electric energy consumption. Repeated measurements by multi-point foot compared to the cross and positioning to determine the source of interference in the basic Weibin district government hospital, we use field approximation, while walking more while finding, tracking the direction of the strongest signal search forward, when close to 2 floor, the signal strength increased significantly, Building 2, the line to the conference room near the line pointing to the meeting room the day when the signal strength to rise to-50dBm or more on foot, and beat out the sharp tone of the signal, interference in this conference room. By asking the district government official to know: This conference is being held for security, prohibit the use of mobile phones during the meeting, so in the conference room fitted with two cell phone signal jammers. 11:50, we are the cell phone signal jammers were examined, and its power is divided into large and small second gear, the current set of high-power profile.
cell phone jammer will do no harm to the human and various electronic equipments. Four-channel models can be effectively shielded CDMA, GSM, DCS, PHS mobile signal, shielded Bandwidth CDMA: 869MHz-894MHz GSM: 925MHz-960 MHz DCS: 1805MHz-1880MHz PHS: 1900MHz-1990 MHz. We think: The cell phone signal jammers transmit power, shielding range for standard wide, the base station is interfering Netcom causes of poor communication. After shutting down the experiment, the interference signal disappears, reflecting the base station to monitor the engine room back to normal communications. I stood fast and accurate investigation of the radio manager level, to establish the station in the middle unit and the local people get a good response.
Case: May 2003, Baoji City, Town Qianyang Cui, Town Longxian solid mobile users call in the area there is a single-pass phenomenon. According to different sensitiveness situations of different cell phones, cell phone jammer can make various mobile phones in the shielding range lose the signal within several seconds after it is turned on to shield various mobile phones from sending and receiving the signal.
Analysis: From the CDMA base stations and GSM base station location analysis, the main factors are: the electromagnetic environment requirements. Any type of radio (stations) should leave the man-made radio noise sources (such as substations, electric railways, airports, railway stations, welding, heat sealing machine, X-ray machines, etc.) far enough; radio interference protection. More base stations set up at the same location in the case, to consider the same radio signal between the radiation may be directly or indirectly interfere with. The distance between the base station meets the requirements of protection, particularly the use of similar frequency band, interference must be tested and
Product introduction of cell phone jammer
Brand: cell phone jammer; model: JN101A;
covering radius of cell phone jammer: 25-30（m）
Meeting secrecy Cellular Phone Jammer
Functions and features of mobile phone jammer: As the modern communication technology rapidly develops, using of the mobile phone has become more and more popular. The mobile phone communication facilitates people’s life and at the same time it causes new problems for communication safety and confidentiality.
In recent years, several leaking accidents through the cell phone have happened in our country. Leaders at all levels have paid great attention to these accidents for their hazard level and seriousness.
Product introduction of cell phone jammer
The cell phone jammer specifically designed, developed and manufactured by our company adopts reliable information protection technology and electronic devices of high performance through repeated experiment and testing according to communication principle of the mobile phone.
The cell phone jammer (normally-open and enhanced type) prevent communication between mobile phone and base station through constantly sending channel frequency of the mobile phone to ensure the safety and confidentiality at site.
The equipment has characteristics of aesthetic appearance, convenient use, wide application range and good electromagnetic compatibility and so on to meet different needs.
The warranty card and the cell phone jammer to be repaired
1 When repairing the cell phone jammer in the warranty period, if it is within the paid repair range after the technical authentication from our company, the paid fee will be charged as per the cost.
2 The warranty period of the cell phone jammer is 1 year. For the damage which happens in the warranty period and is caused by the inappropriate and artificial using and maintenance, contact the local agency for the free repair matter.
3Please present the warranty card and the cell phone jammer to be repaired when repairing the equipment in the warranty period. The agency will contact our company for the repair.
4 If the cell phone jammer can not normally work for the artificial factor, such as inappropriate artificial using (turn on the power supply before installing the antenna as per requirements), open the machine shell arbitrarily and so on, our company will not be responsible for the repair even in the warranty period.
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