In fact, Diy Cell Phone Blocker Youtube makes mobile phones basically hopeless, but on mobile phones, users can also use their own communication tools. There is a special radio transmitter on the hand selling the answers, and there is a radio receiver on the candidate's hand (most ** tools on the market are of this type). The frequency bands used by these illegal communication tools can be outside the frequency band of cell phone jammer devices and often violate the dedicated frequency band of walkie-talkies. For example, some candidates use built-in headphones to receive answers transmitted by radio. Sometimes, the earphones are so small that a magnet is needed to pull them out. It needs the help of a doctor to get it out. Alternatively, the receiving module and other electronics are hidden on the legs of the glasses.
There is a radio monitor that can help with electromagnetic signals in those frequency bands that Diy Cell Phone Blocker Youtube can't handle. Before the exam begins, the signal strength of various legal radio wave devices, such as cell phones, radios, televisions, etc., are recorded in the exam room. After the exam begins, the radio monitor in the car is activated and the entire radio frequency band is available. When the **tool starts sending answers to the test room, the display will "grow out" an unidentified radio signal, and the **tool's signal has a hard time escaping the sophisticated detector ears. No matter how sophisticated the equipment is, the nature of electromagnetic waves "big near, far and small" must exist. By relying on multiple monitors placed in different positions, it can be calculated according to the distance and the strength of the signal. The position of the signal transmitter, the answer transmitter was captured on the spot. No matter how precise the device used by the attacker, the nature of electromagnetic waves "near big, far small" is certain to exist. Based on the monitors placed at different locations, it is possible to calculate the position of the signal transmitter based on the distance and strength of the signal, and capture the answer transmitter on the spot.
