Jamming forms and precautions for use of wireless signal jammers

In the past, wireless signal jammers were commonly used in examination halls to block mobile phone use. These jammers effectively cover base station signals at close range by emitting signals similar to base stations. This prevents mobile phones from detecting actual base station signals. However, it is worth noting that even if the signal blocking function of mobile phones is not required, safer and more environmentally friendly alternative detection methods can be used.

Mobile phone signal shielding can be divided into two types according to the shape of the shield: omnidirectional and directional. Omnidirectional shielding is usually olive-shaped, while directional shielding is fan-shaped. Therefore, omnidirectional shielding has a larger coverage range than directional shielding.

Signal jammers suppress mobile signals by emitting electromagnetic waves of a specific frequency. If the power of the shielding exceeds the power of the local mobile signal, the mobile phone will have no signal. On the contrary, if the shielding power is lower than the power of the local mobile signal, the mobile phone will receive the signal.

When using a signal jammer, you need to pay attention to the following points:

1. Install the antenna on the host device according to the corresponding logo, and then turn on the host power. It is strictly forbidden to turn on the power without connecting the antenna.
2. The transmitting antenna of the jammer should be an omnidirectional antenna, and the effective coverage gradually weakens as it moves away from the antenna, and it is circular. When using a jammer, ensure that the antenna is positioned and angled correctly to avoid blind spots in the shielding.
3. Place the wireless signal jammer in a well-ventilated area and ensure that the antenna is away from large objects, strong heat sources, and strong electromagnetic sources to ensure optimal shielding effect and long-term stable operation.
4. During the shielding process, avoid stacking other items on the jammer or disassembling the antenna, as these operations will have a negative impact on the shielding effect and may damage the device.
5. When the jammer is not in use, the power supply should be disconnected in time to avoid adverse effects on the normal use of the mobile phone.

Wireless WIFI jammers are similar to signal blockers and will interfere with the connection between the mobile phone and the base station. Communication between mobile phones follows a path that includes the mobile phone, the base station, and another mobile phone. Signal jammers will disrupt this connection path, resulting in abnormal transmission. It should be noted that the signal emitted by the jammer will only block mobile phone communication and remain relatively static, without affecting other electronic devices.

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