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source:Industry News release time:2021-07-02 Article author:sznbone Popular:Prison Jamming system
The current situation and misunderstandings of prison cell phone jammers
Current situation:
1. The area that should be shielded is not strictly shielded, which is costly and laborious and has no actual effect;
2. The area that should not be shielded has serious interference, and is complained and cannot be used normally;
3. There is a gap between overly biased detection and pseudo base station technology, ideal and reality.
Misunderstanding:
① The greater the power, the better
1. Inaccurate host frequency output, frequency drift, too wide bandwidth, power waste, and interfered base station;
2. The simple frequency sweeping power suppression method has low shielding efficiency and large radiation;
3. The power is false standard, exaggerated publicity, and the nominal power loses its reference value;
4. Power is the foundation and technology is the key. It is better to find good methods and skills to fight for power;
② Interference can be avoided by using directional antenna
1. There is a certain transmitted signal strength outside the directional angle of the directional antenna, but it is much lower than the main lobe, not completely directional;
2. The reflection of the building will still cause external interference;
3. The frequency drift of the host computer seriously affects the base station and causes external interference;
4. TD full-time shielding interference must exist.
③ The radiation of high-power equipment is large, and the radiation of low-power is small
1. The high-power uses an outdoor antenna, which has a long operating distance, large shielding coverage, and uniform shielding signals, but radiation is minimal;
2. If low-power equipment does not use multiple antennas for long-distance shielding, but is arranged in a centralized manner or five antennas are used together, the radiation power will be greater than ten microwatts or square centimeter, and the short-range radiation must be seriously exceeded.
Method for selecting mobile phone jammer equipment
1. Shop around and choose products from three companies, and learn more about them through extensive research.
2. See the effect of the prison demonstration.
3. The actual effect of the case study.
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