By transmitting weak radio waves of the same frequency as those notified by the mobile base station, communication is blocked, and subsequent location registration and polling cannot be performed, rendering the display of the mobile terminal unusable and unable to communicate. suppress. can. Not only does it block mobile radio waves, but it also blocks the 2.4 GHz band, the most popular wireless camera for cheating. It supports all frequency bands of mobile phones and PHS currently used in Japan. I bought a portable cell phone jammer, but it seems to be tuned to radio waves outside North America, so I’m trying to tune it for home use. It’s about changing the voltage by playing with a small variable resistor, but I’m wondering if it can be done correctly without a spectrum analyzer, but interesting as an article. A Chicago man has been arrested by police after making it his life’s work.
It appears he blocked the radio waves with a cell phone jammer on his morning commuter train. The cause has long been unknown, but a police report a few months ago said, “While someone was answering the phone in the car, a suspicious person took out a black five-antenna device and turned it on to interfere with the radio. Waves.” A photo was also provided, which police posted online and are conducting a joint investigation with the Chicago Department of Transportation and the Federal Communications Commission (FCC). Remove unpleasant noises from your phone without being noticed! We promise a quiet environment. Of course, you won’t have internet access, so you’ll be able to focus on what you’re doing at the event.
Installing a “cell phone jammer” is not a random act. The signal-blocking range of “cell phone jammers” is limited to classrooms. As soon as you step out of the classroom, the cell phone signal will be restored. In order to ensure that the health of students is not affected, the school attaches great importance to product quality. The installed “mobile phone shield” is a qualified product that meets the relevant national electromagnetic radiation standards and does not affect the human body. Qualified products are already in use in many schools and exam rooms. It can be seen that the school is serious and responsible for students when doing this. The scope of cell phone jammers is limited to the classroom, indicating that the school’s conduct is moderate and does not compromise students’ freedom of communication and speech. The exercise of any right is limited and cannot harm the rights and public interests of others. The same goes for the freedom of communication and speech that citizens enjoy in accordance with the Constitution and the law, and shall not exceed their due limits. If students play mobile phones in the classroom and affect the normal teaching order, it is beyond the scope of their own rights and should be restricted.