At the beginning of the new year, in order to welcome the college entrance examination in June and the senior high school entrance examination in July, many schools that will be used as examination rooms have already started to construct standardized examination rooms. According to the construction standard of the standardized examination room, the mobile phone signal jammer system is a project that must be built well. However, when the customer demonstrates the scheme of the jammer system and selects the equipment, he will find that there are two technical solutions. The first one It uses conventional low-power mobile phone signal jammers to cover the jamming signals in the form of cellular networking. The second is to share the host of high-power jamming equipment, and the antenna transmitter adopts the indoor signal distribution method. Each classroom in the classroom is covered by interference signals. Then the question arises: facing these two technical solutions, how should customers choose? What are the advantages of the indoor signal distribution scheme of the mobile phone signal jammer system?
The process of building a mobile phone signal jammer system in the first way of cellular networking mentioned above is relatively simple and easy to understand, so we won’t describe it too much. Focus on analyzing the advantages and disadvantages of using the indoor signal distribution method.
First of all, let’s talk about the advantages: the host device of the mobile phone signal jammer system will be installed in a relatively hidden location, which is convenient for independent maintenance and repair. The antenna end usually adopts a small omnidirectional antenna, which is installed on the ceiling in corridors or classrooms. The size of the antenna is small and inconspicuous. If there is a gypsum board ceiling, it can also be installed inside the ceiling to achieve complete concealment. For the construction of a mobile phone signal jammer system for a teaching building, the number of hosts required is relatively small. A host can usually solve the signal interference of multiple classrooms on the 2nd or 3rd floor.
Let's look at the disadvantages again: if the indoor signal distribution scheme is adopted, the hosts of the system are all high-power devices, and the cost is relatively high. The purchase cost of a high-power host is almost equivalent to dozens of low-power mobile phone signal jammers. If a teaching building has a height of 4-6 floors, it will need at least 2 high-power hosts. If the length of the building is relatively long, the number of hosts required may double. This will undoubtedly increase the construction cost a lot. The way of indoor signal distribution During the construction process, the remote transmitting antennas are connected in parallel to a main feeder, and this main feeder is finally connected to the system host, and there is always a cable connection between the main feeder and each examination room , then there must be construction work for system wiring, wall penetration, and hole drilling. And there is another phenomenon that needs to be paid attention to. For several transmitting antennas connected in parallel on the main feeder, from near to far, the strength of the interference signal that each antenna terminal can obtain is a process of gradual attenuation. The antenna at the end can receive a strong interference signal and transmit it, while the antenna at the far end will be greatly reduced, which will make each examination room and classroom in the mobile phone signal jammer system show different final interference effects.
