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How to configure network jammer in standardized examination room

How to configure network jammer in standardized examination room

  • 2022-11-24
In order to safeguard the interests of the vast majority of examinees and improve the fairness of the examination, necessary restrictive measures must be taken against the cheating of a few people. The examination management department has adopted the practice of installing network jammers.

So, how should the standardized examination room be configured with a network jammer? In general, we recommend using low-power machines in normal standardized examination rooms. One examination room equipped with a network jammer is enough to shield the entire examination room. In case of strong signal field strength or large area, multiple jammers can be used to achieve full coverage.

Some people will propose that if there are many examination places, how can we centrally and uniformly manage the network jammers? We have many solutions to this problem.

(1) The existing power carrier/433MHz wireless communication is used to manage the jammer, and the software unified switching, timing, fault alarm and other functions are realized. When 433MHz wireless communication is used, some people will ask questions. What the network jammer shields is the wireless signal, will it interfere with the communication? Don't worry about this at all. Usually, the lowest transmission frequency band of our jammer is 865-885MHz. No interference with 433MHz wireless. It will not affect the permission.

(2) Through TCP/IP protocol, each network jammer needs to be configured with a fixed IP address. This communication mode requires each machine to be equipped with a network cable.

The use of the network jammer ensures the fairness and justice of the examination room. However, some parents of examinees feel uneasy about this and worry that it will affect the normal play of their children's college entrance examination. In fact, the parents of the candidates have no concerns in this regard. These devices will not cause harm to the candidates and test staff, and this kind of network jammer can be completely silent, and will not affect the normal play of the children's college entrance examination.

Whether any kind of electromagnetic wave transmitting equipment is harmful to human body depends on the specific absorption rate of electromagnetic wave by human body. The highest RF radiation safety standard SAR recognized by the International Commission on Non Ionizing Radiation Protection is 2.0, while the standard in China is 1.5. At present, the transmitting power of the transmitting tower of the wireless communication base station is generally 40W~50W, and the specific absorptivity of the human body for electromagnetic waves is below 1.0 when it is 20 to 30 meters away from the transmitting tower. The full band shielding instrument used in the examination room is a micro power device, and its transmission power is generally less than 3W. In this case, the specific absorptivity of the human body to electromagnetic waves is negligible. Therefore, the network jammer used in the examination room is not harmful to human health.

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