Second, due to the limitations of the on-site environment, the police jammer cannot be placed close to the mission site, so the police jammer can be placed as high as possible. The advantage of placing it at a high place is to reduce unnecessary obstructions. If the interference signal emitted by the police jammer can be directly and unobstructed to the mission site, it will be helpful to improve the shielding range of the police jammer.
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Third, with the spectrum analyzer, the test place uses the frequency parameters of the mobile phone signal on site. According to the frequency parameters of the mobile phone signal, the frequency parameters of the radio frequency module corresponding to the police jammer are set to improve the performance of the police jammer. Block range. Note that when setting the frequency parameters of the RF module, it is necessary to add 2-3MHz before and after the frequency range, so as to avoid the frequency offset of the RF module during output.
The above three methods are suitable for different places of use. Through these three methods, the interference range of the police shielding device in different use environments can be squeezed to the greatest extent. Before the mobile phone signal jammer is officially launched, the shielding effect of the mobile phone signal jammer must be tested first, so that the installation location and quantity of the cell phone jammer can be selected.
Signal JammerFirst, preset the installation position of the mobile phone signal shielding device, and place the mobile phone signal jamming device on the desktop, usually at the front and rear corners of the use site. Turn on the power and turn on the switch to test the shielding effect. . World first all-in-one powerful cell phone 5G GPS UHF VHF WIFI jammer
Before preparing for the test, prepare three mobile phones of different operators, and place the mobile phones in the opposite corners of the use site, which is also the farthest position from the on-board signal shielding device. Then let the mobile phone stand for about 2 minutes. During this period, please do not perform any operations on these three mobile phones, and then check whether the mobile phone signal is blocked on the mobile phone screen. It is blocked. If the mobile phone shows that there is a signal, you can try to call the operator's customer service hotline, or use the mobile phone network for data Internet access. If it is possible to make calls or access the Internet via data, move the cell phone to a position close to the cell phone signal jammer, and reciprocate until the cell phone is completely blocked, and the cell phone cannot make calls or access the Internet via data. Use this to determine the shielding range of the mobile phone signal jammer, and use this shielding range to determine the number of mobile phone signal jammers used.