Frequently asked questions before installing the equipment
1. Before installing this equipment, be sure to install the antenna correctly according to the instructions and then turn on the power to prevent the equipment from being burned.
2. Before installing the equipment, you must first know the direction of the communication base station, and try to position the signal jammer for salealong the direction of the communication base station.
3. When installing equipment, you should pay attention to whether there are metal objects about 1 meter around the equipment to avoid causing signal reflection and even affecting the effect of the shield.
4. Take moisture-proof and lightning protection measures when installing outdoors.
5. Explosion-proof equipment should be installed in special environments such as gas filling stations and steam filling stations.
6. The appropriate installation height is 1.8-2 meters. It can be placed on a table, placed on a wall or installed on a ceiling. It is best for the antenna to be vertical to the ground.
7. When installing in a room, you should pay attention to whether the transmission frequency of wireless network devices already in the room will cause co-screen interference.
8. Be sure to fully consider the pressure resistance and spacing of the current high-precision instruments in the room against the influence of different frequencies.
9. If the room is equipped with an amplifier such as a signal receiver, it is not advisable to install a jammer.
10. Fully understand the boundaries between jammed areas and non-jammed areas.
On-site inspection
Understanding abnormal receiving sensitivity is very important for the installation and use of jammers. Because there are a variety of signals in an environment, and the hardness of various signals is different, therefore, by understanding the local receiving sensitivity, a safety cell phone jammer can be designed and manufactured purposefully.
In the absence of survey equipment, it is necessary to know the status of the base stations near the installation site, estimate the distance, what base stations they are (China Mobile, China Unicom, CDMA, China Unicom, 3G and other base stations), and the location of the base stations. Where is the direction of the antenna set? Generally, communication base stations in big cities are mostly located on the roofs of taller buildings, and tower poles are often found in suburbs or villages.
If there is survey equipment, you only need to record in detail the receiving sensitivity of several points in the room and outdoors at the scene.
Design plan installation
According to the survey results, effective matching of different signals has been achieved and the optimal situation has been achieved. The impact level in unshielded areas and the impact on nearby base stations should be considered.
1 Clarify the rough assembly plan. During the actual installation and use process, install the area with strong signal first (that is, the area closest to the communication base station), use directional antennas, and gradually install them along the angle of the mobile communication base station.
2 Considering the floor height of the shielding area, since the signal in high-rise buildings is better at lower floors, a top-down assembly sequence is adopted to achieve the best shielding effect.
3 Considering the anti-interference ability of the PHS communication base station, the output power of the PHS communication base station is generally relatively small, and the PHS communication base station only has uplink and downlink routes. The communication base station is easy to digest and absorb electromagnetic interference, resulting in the communication base station not being able to operate normally. at work.