Signal jammers effectively interfere with the network

The basic principle of cell phone jammer equipment is to emit the same radio frequency signal as the mobile phone. Because the frequency is the same, the mobile phone cannot distinguish which signal is a regular base station signal, thus realizing "interference". As long as there is a machine with the same frequency as the phone, when the base station tries to connect to the phone, it will make a lot of "noise". You will find that the signal from the phone is unrecognizable, so you will refuse to communicate with the phone.

3g jammers

In the early days, jammers only blocked a set of frequencies, such as 2G, while complex jammers could simultaneously block several types of networks, such as 2-3-4G.

The basic principle of mobile phone jamming equipment is to emit the same radio frequency signal as the mobile phone. Because the frequency is the same, the mobile phone cannot distinguish which signal is a regular base station signal, thus realizing "interference". As long as there is a machine with the same frequency as the phone, when the base station tries to connect to the phone, it will make a lot of "noise". You will find that the signal from the phone is unrecognizable, so you will refuse to communicate with the phone.

In order for the mobile phone signal jammer to effectively interfere with the mobile network, it is necessary to ensure that the signal field strength emitted by the signal blocker should be much greater than the field strength of the mobile signal BCH in the interference area. Therefore, the same jammer uses different locations and the effective area of ​​interference The size is different. Generally, the closer to the base station, the stronger the local BCH field strength, and the smaller the area where the jammer reaches effective interference. Generally, the interference radius can only reach 0.5-9m; the farther away from the base station, the BCH field strength is relatively weak. , Then the radius of the jammer to achieve effective interference is larger, up to ten to tens of meters. Therefore, the local BCH field strength should be fully considered before using the interference device, and then the location, number and combination of the interference device should be determined according to the size of the interference area.

Since the frequency band used by mobile phones is dedicated, the transmission frequency of the mobile phone GSM jammer in the conference room is completely within the working frequency band of mobile phones specified by the country, so it has no effect on other electronic equipment such as TVs and radios. At the same time, the mobile phone jammer only interferes with the BCH transmitted by the base station received by the mobile phone, so that the mobile phone cannot establish contact with the base station, so it has no effect on the mobile phone. Furthermore, although the signal field strength it emits is stronger than that of BCH, it is far weaker than the electromagnetic radiation field generated by mobile phone calls through testing, so it will not harm the human body and can be used for a long time with confidence.

Posted in Teknologi on November 30 2020 at 02:01 PM

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