How to choose the suitable signal shielding manufacturer

　　When you buy a wireless mobile phone signal shield, you must choose the product to test the shielding effect. In the process of purchasing, you must see whether it can shield all the current mobile phone signal networks. Mobile phone signal shielding power size, function model, the effect is not the same. Therefore, it is necessary to select the signal shielding instrument manufacturer which is suitable for the occasion and has good shielding effect. Mobile phone signal shielding device is widely used in examination room. According to the experience and problems of anti cheating in college entrance examination, the following points should be paid attention to when choosing a good mobile phone shielding device for examination room;

　　1、 According to the power and scope of application of mobile phone signal shielding device, it can be divided into conference room, army, prison, college entrance examination room, gas station and secret place. The price of different types of shielding device is also different. According to the different surrounding environment, in order to better play its role, the examination room must choose a special mobile phone signal shielding equipment.

　　2、 Due to the rapid update of modern mobile phone network, especially after the issuance of 5g signal license plate, the network speed function of mobile phone is more powerful, and the convenient and fast Internet access function also increases the difficulty for the college entrance examination room to prevent cheating.

　　3、 The choice of mobile phone signal shielding device depends on whether the manufacturer of the shielding device has the corresponding product qualification, so as to ensure the quality and performance. First of all, we should test the shielding distance of the shielding device. Don't use a mobile phone of one or two networks to try it. In the examination process, cheating candidates use different mobile phone networks, especially 5g mobile network adopts broadband high-speed transmission mode. If the power or bandwidth of mobile phone shield is not enough, 5g may not be blocked. Therefore, it is necessary to find all the mobile phones of the current mobile communication companies before testing, so as to ensure that each mobile phone network can meet the needs of a classroom Off!

　　Haisi Zhongtuo Electronic Technology Co., Ltd. is a professional electronic technology company mainly engaged in radio frequency engineering and wireless network coverage optimization design and providing corresponding products. It is a diversified high-tech enterprise integrating R & D, production, engineering and service. The company was established by a group of returned to Japan, Dr. ou and other parties, with a total registered capital of more than 5 million yuan.

　　Haisi Zhongtuo's knowledge about signal shielding device

　　I believe that we are not unfamiliar with cell phone signal shielding devices. In recent years, various shielding devices have emerged in the market. We all claim that their shielding devices are particularly good, and the materials are full of moisture, so you can't tell the good from the bad. So what kind of understanding should we have about the shielding devices?

　　The first point is that the higher the power of the mobile phone signal shielding device, the farther the shielding effect is. In fact, this is not entirely true. Many manufacturers can not detect the actual power of ordinary users, and deliberately exaggerate the openness of shielding power. As a result, the nominal power index of the equipment loses its reference value. For large-scale shielding system, shielding skill is the decisive factor affecting shielding effect. The advantages of advanced shielding technology are far greater than the output power factor of shielding equipment.

　　The second point is to use directional antenna to avoid external interference. This is also incorrect because the directional antenna covers the main, side and back lobes. The mask angle of the main lobe is defined as the signal shielding including the angle when the external power of the main lobe decreases by 3dB. In other words, the radiation intensity of the side and back of the directional antenna is only much lower than that of the main lobe. Therefore, if the space near the spaced antenna is still relatively shielded, the reflection of the shielded building will still cause external interference. In addition, if not used properly, the upstream disturbance will be caused, and the disturbance scale will be large. Therefore, whether the equipment skills can be satisfied, the use of antenna and system debugging are far more meaningful than the use of directional antenna.

　　The third point is that we all think that the signal shielding interval is a hard indicator. In fact, intervals are not absolute values. It is related to the intensity and quality of spatial signal. In short, spacing is meaningless. For the same shielding power, if the interval is 100 m-70 dB, then only 12.5 m is at strong-52 dB. The shielding interval is related to the antenna gain. When different gain antennas are used in the same power shielding host, the spacing will be very different. For example, the antenna spacing with a gain of 16 dB is 100 m and that of a gain of 4 dB is only 25 M.

　　As mentioned above, when selecting mobile phone signals, it is not only the trust of hearing, but also need to be tested by ourselves.

　　Company Profile

　　Vecano Electronics Company Limited was established by China Government in 2011, focusing on the development and marketing of Security and telecom products.

　　HISEA is a registered brand of Vecano Electronics Co.,Ltd. HISEA is the foremost innovator in the field of RF jamming. In countering the ever growing threat of remotely controlled improvised explosive devices (RCIEDs), Vecano has invested heavily in the development of a range of State-of-the-art. Vehicular Jamming system ,Portable/Tactical Jammers,Stationary jammer, Bomb jammers, Rf jammers,Cellphone jammers, Custom/Embassy Jamming Solutions, Portable Jammer system ,Prison Jamming system, Handheld Jammers Solutions and so on, for the protection of troop transportation, Military and Police checkpoints , large Governmental establishments, Bomb Disposal Squads and VIP convoys. Also, HISEA produce mobile signal booster/mobile amplifier/mobile repeater. Products widely used in blind zones of offices, family rooms, factories, bars, supermarkets, underground parking garage, etc, where the signal is very poor, or in spite of full mobile signals on the mobile phone, there is a break in voice leading to call clarity problem.

　　We have strong and excellent R&D group who dedicated to the research and development of our new products. They have used to work in leading companies in telecom industries, such as Huawei Technologies Co.,Ltd. We help customers achieve success, thinking highly of people in our company, pursuing excellence, contributing to our country and inheriting merits of innovative, diligent, precise and practical. We are consumer-oriented and do our best to offer satisfying products to customers.

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