Having experienced many exams, such as the college entrance examination, the postgraduate exam, the CET 4 and 6, various qualification certificate exams, and the annual civil service exam, etc., candidates who have taken the exam should be familiar with them. In the exam room, the most common The test room auxiliary equipment is a full-band jammer to prevent cheating.
Before 5G was popularized, the signal blocker used in the examination room could only interfere with 4G. With the continuous development of the communication industry, 5G mobile phones have become popular today. So how can the old full-band jammer in the exam room only interfere with 4G and how to upgrade to 5G? We all know that the current full-band jammer has basically achieved modularization, that is, different frequency bands, using different modules, through the rapid replacement of modules, can achieve rapid repair or rapid increase in frequency bands and other advantages. Adding different frequency band modules on the basis of the original jammer is still a headache for many manufacturers, because at the beginning of the design, they are all designed according to the standard mobile phone frequency band, lacking different usage scenarios, requiring the increase of interference modules in different frequency bands function. If you want to upgrade to 5G, a separate module position must be vacated on the original jammer to add a 5G module. Or add a jammer that only interferes with 5G.
The interferometer produced by topsignaljammer Technology Co., Ltd. has been fully considered in the design. The requirements of different frequency bands are added later. Through the superposition of radiators, the original 12-channel output can be easily expanded to 24-channel output. The fixed holes required for superimposing the radiator are reserved, so that even if more frequency bands need to be added later, there is no need to worry about the lack of space for the radiator. And it can be extended to up to 24 interference frequency modules to achieve more frequency signal interference, or to achieve the same scene through frequency refinement to expand the ability of the shielding effect.
A report by Ofcom, the UK telecoms regulator, indicates that 2008 was the year with the highest levels of enforcement and fines. In densely populated urban areas, illegal distribution, or so-called pirated distribution, remains a problem. In 2008 Ofcom conducted 36 raids on the studio, received 28 charges and 14 official warnings, removed 489 transmitters and cell phone jammers and issued 74 written warnings to combat these illegal activities. Officials stressed that such illegal transmissions affect personal safety, including fire, police and emergency medical services, as well as air traffic control, and interfere with programs permitted by law. There are also problems with the sale of illegal devices. Websites can usually secretly buy phone jammers, cell phones, fm bugs, radio broadcasters, and closed circuit wireless televisions. All of these devices can cause serious interference to legitimate wireless devices. In 2008 Ofcom conducted 126 investigations into illegal devices and generated 46 written warnings. In addition, 420 online advertisements were deleted and 6 members of an e-commerce website were banned. Four people were convicted and six illegal documents were formally warned and confiscated. More information can be found on the Ofcom website.