
On the importance and characteristics of Signal Jammer in examination
Signal jammer is a popular product,
especially in some colleges and universities, because each examination room
near the examination center will be equipped with a signal shielding device and
a handheld metal detector. The use of signal shielding equipment can effectively
solve the problem of cheating in the examination room and create a good
examination room environment for candidates. Therefore, it is widely concerned
by universities.
Generally, signal jammers are mostly
used in classrooms, with built-in blocking jamming signals, which can shield
all 2g 3g 4G 5g signals, 2.4G WiFi signals and Bluetooth signals under the
three operators of China Mobile, China Unicom and Telecom. The actual effective
shielding distance is inversely proportional to the signal strength of mobile
phones on the site. The weaker the communication strength, the larger the
shielding range. The principle of the signal jammer is to interfere with the
frequencies sent by the mobile phone receiving the base station and the
wireless router through its own frequencies, so as to achieve the purpose of
shielding them. Therefore, as long as the shielding equipment is turned on in
the room, the mobile phone cannot receive and make calls, receive and send text
messages and surf the Internet. At the same time, without affecting the use of
other electronic instruments, it ensures the silence and confidentiality of the
on-site environment. Once the mobile phone leaves the partition area, it can be
restored to normal use.
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