First, I want to build the application site. Most of the original test site types Mobile Cell Phone Blocker Circuit are suitable for long-term work and are durable. Second, how big are we in the shielded area? For example, for a house of 100 square meters or a site of more than 1,000 square meters, if the total area is large, the output power needs to be larger, and if the total area is small, the shielding output power needs to be adjusted. What other frequency bands must be blocked, China Mobile, China Unicom, China Telecom, CDMA are all blocked? Or only need to block part of the frequency band. When choosing the right cell phone jammer , in order to achieve the best practical effect, you also need to look at the application skills. The most important aspects are as follows: It is recommended that the room-type mobile phone signal jammer be placed at a height of 180cm-220cm from the ground, and the viewing angle should be expanded. Whether there are obstacles (such as walls, metals, bodies, etc.) between the mobile phone jammer and wireless communication devices (mobile phones, etc.). The electromagnetic interference emitted by the mobile phone jammer will have different degrees of attenuation coefficient after passing through the obstacles, please try to reduce it as much as possible. The weaker the wireless communication receiving sensitivity under the application conditions, the stronger the actual shielding effect of the basic theory of the mobile phone signal jammer. The farther the mobile phone jammer application scenario is from the communication base station, the stronger the actual shielding effect of the basic theory of the mobile phone signal jammer.
During the college entrance examination, the school is open Mobile Cell Phone Blocker Circuit , which will affect the quality of calls around the test room, such as frequent hang-up, missed calls, dropped calls, intermittent calls, slow Internet access, etc., which will return to normal after the test. At the same time, in order to ensure smooth signals around the campus, the operator has arranged communication engineers in advance to test the entrances and exits of each test center and the rest area for parents accompanying the test, and to expand the software and hardware of the nearby base stations to ensure high traffic and high traffic during the test. High liquidity. Apart from being blocked during the exam, we have done our best to ensure that your communications are uninterrupted. We know that in the annual college entrance examination, in order to prevent cheating in the exam, all communication signals in the examination room will be blocked. There are cell phone jammers in the exam room. At the same time, there are radio monitors outside the examination room, which can help repair the electromagnetic wave signals in those frequency bands that the mobile phone signal jammer cannot handle, and monitor the radio wave signals from unknown sources in real time. Obliterate useful electromagnetic wave signals. So what if your phone is blocked? Due to the rapid development of wireless network, it has now developed to 4G network. Many test rooms use relatively old signal jammers, which are helpless for 3G and even current 4G networks. Crack method: use a 3G or 4G card - it feels like the 2G network is gone.
