Mobile phone jammer interrupts wireless communication

The principle of the mobile phone jammer: within a certain frequency range, the mobile phone and the base station are connected by wireless electromagnetic waves, and the data and sound transmission is completed through a certain baud rate and modulation method. The communication principle of the mobile phone signal jammer, in the working process, the mobile cell phone jammer scans from the lower frequency of the forward channel to the high end at a certain speed. This scanning speed causes garbled interference to the message signal received from the cellular phone, and the cellular phone cannot recognize normal data sent from the base station, so the cellular phone cannot connect to the base station. The mobile phone showed signs of searching the network, no signal, no service system, etc. Now we know that the communication method of wireless communication is communication with electromagnetic waves. The functional characteristics of electromagnetic waves depend on their frequency.

Do you know how to block cell phone signals? I heard that some buildings do not receive radio waves from mobile phones. The cell phone jammer allows you to make calls and control outgoing calls, including whether the cell phone is within or outside the service area. We manufacture jamming devices and then sell them in online auctions. It has many uses. Recently, the number of cases where the site is being tested is increasing. This helps ensure the fairness of the test site. This is an effective measure. The government and these uses are supportive. Problems found in the entrance exam. I try to type the actual question in the mobile email. That is a big problem. The university has begun to take various measures because of the repeated use of mobile phones to cheat during exams. Some equipment that is no longer in production has attracted people's attention. A mock examination was conducted for the entrance examination. In order to familiarize students with the test atmosphere starting from the whole country, for example, in production, measures have been taken to prevent the use of mobile phones.