While millions of people welcome the freedom of mobile communications, some people and companies are advancing with the times. They fight technology against technology and use detectors, jammers and other things to protect privacy, security and sometimes mental health. In the United States, cell phone interference is prohibited, but because foreign companies even sell pocket jammers online on eBay, and the military and government already use such devices, the wireless struggle has begun. The jammer may interfere with communication within a few meters or several kilometers, depending on its strength. Commercial portable jammer have been sold overseas for many years, and even some Internet posts even contain instructions for making homemade models. The Federal Communications Commission prohibits people in the United States from manufacturing, selling, operating, or importing radio interference equipment. People who violate the provisions of this 70-year-old communications law will face up to one year in prison and a fine of $ 11,000 for each violation. Disturbance experts claim that people use low-power devices and they are not afraid of retaliation because it is difficult (if not impossible) for callers to distinguish between interfered signals and normal dead zones on cell phones.
The function of the jammer deliberately blocks or interferes with the radio signal, which essentially “blocks” the radio signal, thereby interrupting the communication between the sending and receiving devices (ie, the remote control and the receiving device). Drone). Traditionally, interference has been used to disrupt enemy communications on the battlefield. Interfering transmitters transmit noise at the same frequency, which affects the receiver’s ability to understand the message being sent. In some countries, cell phone jammers are used as detection equipment to prevent citizens from receiving harmful radio signals from neighboring countries. Other types of jammers will prevent signal reception without using noise.
In order for the jammer to work properly, it must be close enough to the signal that its team wants to jam. On the other hand, according to perfectjammer, an independent think tank dedicated to military electronic systems, jammers of high-power drones can detect targets tens of kilometers away. Interference requires more power than detection, so the distance that Avtobaza can interfere with the drone must be less than 90 miles.
Last week, it turned out that five days after Mr. Liptak was suspended, officials were told that the teacher had purchased a mobile phone jammer, rendering his students ’equipment unusable. Mr. Liptak, who teaches science at Fivay High School, believes that his actions will benefit young people because they can better focus on the lessons he teaches about jammer equipment.