In fact, many friends have doubts about the installation of mobile phone signal jammers in the examination room! They don't know how to install them, and they don't know what machine model to choose, etc. In fact, the solution to this problem is to apply the built-in antenna mobile phone signal jammer dedicated to the Shenzhen examination room.
The specific parameters of the mobile phone signal jammer in the examination room of the nine districts of Shenzhen
technical parameter
1. CDMA frequency band transmission frequency 850-894MHz
2. GSM frequency band transmission frequency 925-960MHz
3. DCS frequency band transmission frequency 1805-1900MHz
4. 3G frequency band transmission frequency 2010-2170MHz
5. 4G frequency band transmission frequency 2500-2600MHZ
6. PHS frequency band transmission frequency 1900-1990MHz
7. DHS/Walkie-talkie frequency band transmission frequency 400-500 MHz
8. Wireless equipment 100-200MHz
9. WIFI 2400-2500MHZ
10. Power input AC 110V-240V
The above are the common frequency bands of mobile phone signal jammers in the nine test rooms, which can be used in the normal test room.
The installation method of the mobile phone signal jammer in the examination room
The best installation method is to install one in each classroom. The machine can be placed directly on the podium or directly fixed on the wall or ceiling with screws. The surface temperature of this product can reach 50℃, so please keep it away from low heat resistant objects.
Installation height: 1.0-2.0 meters for the best effect
Installation direction:
Connect the power plug directly to the AC220V power supply.
The difference between the built-in antenna and the external mobile phone signal jammer
Some friends also asked what is the difference between the mobile phone signal shielding device with built-in antenna and the mobile phone signal shielding device with external antenna? Isn't the effect of an external antenna better? Not so. The effect of the mobile phone signal jammer with external and built-in antennas is almost the same. Because the built-in antenna is inside the host, it will use a gain antenna to make up for it, while the external antenna uses a whip antenna. Relatively speaking, it is better to use a built-in antenna in the examination room, because the shielding is better, and candidates will not feel pressure when they see it.