Want to know about wireless signal jammers?
During the working process, the wifi signal blocker scans from the low-frequency band to the high-frequency band (from the base station to the mobile phone) at a certain speed, causing interference in the process of receiving the newspaper signal, making the mobile phone unable to detect the normal data sent by the base station and unable to communicate with it. The base station establishes a connection and displays no signal and no service status. For example, when a cell phone communicates with a base station, signal blocking acts like a prank that intentionally creates noise around you. The noise signal is too loud. The mobile phone cannot hear what the base station says, and the base station cannot hear what the mobile phone says.
In fact, this is not to block mobile phone signals, but to make the signals emitted by mobile phones disappear among a large number of noise signals, thereby achieving the purpose of interference.
The wireless signal jammer currently used in the examination room has a full frequency band and can interfere with all 2G/3G/4G/5G frequency bands of the three operators. WIFI signals and Bluetooth signals can also be completely blocked. The above is the principle of mobile phone signal blocking. But the frequency band of electromagnetic waves ranges from several Hz to tens and hundreds of GHz, and each segment can be used as a communication signal. Will the examination room use any special frequency bands? This is certainly true of other radio communication tools.
In this context, radio communication tools in dedicated frequency bands "came into being". Wireless signal jammers have no impact on the operating frequency bands of these devices except for the frequency bands covered by cell phone jammers.
For this special radio communication tool, the examination room is equipped with a surveillance vehicle equipped with a radio monitor for real-time monitoring of radio wave signals from unknown sources. So how do radio detectors work? Because electromagnetic waves are "large and small near and far" and detect the characteristics of vehicles through constant movement, monitoring equipment can locate the location of the signal transmitter based on distance and signal strength, and capture offenders using these radio communication tools on the spot.
Nowadays, drones are also appearing in college entrance examination examination rooms, which can locate signals faster. Therefore, neither mobile phones nor these special radio devices can play a role in the college entrance examination examination room.
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