topsignaljammer's blog
As the name suggests, it means shielding wireless signals. The English name of the jammer is JAMMER, which is usually called signal counter equipment and signal sealing control system in China.
Signal suppressor, signal blocker, signal masker, signal blocker, signal driver, etc. are called differently in each place, and the jammer is called according to function or
The use is divided into radio frequency signal jammer, mobile phone signal jammer, GPS Jammer, wifi signal jammer, UHF/VHF explosion-proof jammer, recording
Jammers, test room jammers, vehicle jammers and other wireless signal shielding categories.
main indicators:
Product model: JW-N8G 8-way handheld signal jammer
Shielding signal: full-frequency mobile phone signal 4G/3G/2G +WiFi2.4G/5.8G or GPS/Beidou navigation
Transmitting power: 0.7W per segment, total output power 5.6W (excluding antenna gain)
Shielding distance: 2-20 meters (subject to changes in signal strength or use environment)
Shielding angle: horizontal 360 º (the installation height is about 2 meters)
Indication function: charge and discharge, LED light indication of the working status of each channel
Battery life: Built-in large-capacity lithium battery works continuously for 1.5 hours, standby for 180 days, and fully charged for about 4 hours
Product size: 163x85x47 mm (excluding antenna length)
Host weight: about 0.5kg
Operating environment: -40°C/60°C
Packing details: jammer host x1, omnidirectional antenna x8, charger x1, DC12V car charging cable x1, nylon protective case x1
How to test the local signal strength before choosing a mobile phone jammer?
The interference effect of the signal jammer depends on the signal strength of the use environment. The shielding distance indicated by the manufacturer is usually based on the signal strength of -75dbm, so what type of jammer to choose, you need to know the local signal strength, otherwise there will be no effect or Not ideal situation. The stepped signal icon is just an icon displayed on the front end of the mobile phone system, and it deals with the "dBm" value. Chinese means milliwatt decibels, which is a unit of signal strength commonly used by mobile phones. dBm is calculated by logarithm, so the displayed dBm is negative.
Generally speaking, if the dBm value displayed by the mobile phone is between -80 and -50, then the signal is good, and you can talk and surf the Internet normally. If the value is below -90dbm, it is relatively low, and there may be a phenomenon of dropped calls during calls; if it is -100, it is recommended to turn on the airplane mode when sleeping at night, otherwise the power consumption and radiation will be large! Most Android phones can check the signal strength of the phone through [Settings]-[About Phone]-[Status]-SIM Card Information. How to check the iPhone?
Let's take the iPhone XS as an example. The user can enter the code "*3001#12345#*" in the dial interface, then click the dial button, and click the "Serving Cell Meas" interface in the opened interface to view "rsrp0" and "rsrp1" signal strength value of main card and secondary card.
Mobile phone communication is an open electronic communication system. It must complete the transmission task through communication satellites. As long as there is a corresponding receiving device, it can intercept any time, any place, and anyone's call information. Mobile phones can also leak secrets in standby mode, because in standby mode, mobile phones also maintain uninterrupted signal exchange with the communication network, generating electromagnetic spectrum, which is easy to be identified, monitored and tracked. Intelligence experts bluntly said that even if the user does not use the mobile phone, he can turn on the mobile phone by remote control through a simple phone password and eavesdrop on any conversation you have. Therefore, a full-band shielding device should be installed in secret-related places. The relevant state departments have made the following regulations on the use and management of mobile phones of party and government organs and their staff:
It is strictly forbidden to talk about state secrets while using a mobile phone.
It is strictly forbidden to use mobile phones to store and transmit state secret information.
Mobile phones are not allowed to be brought into venues involving secret state meetings, places where matters involving state secrets are discussed, or the central computer room of secret-related computer systems. If you bring your mobile phone into the above places for special reasons, you should take out the battery or take shielding measures.
In important meeting places, examination rooms or other secret-related places, a full-band shielding device should be used to shield mobile phone signals to prevent mobile phone leaks.
topsignaljammer Technology Co., Ltd. is a professional manufacturer of full-band signal blocker. Accumulated more than ten years of field experience in full-band shielding instrument. For meeting rooms in secret places, the recommended model is: SMa-818B5. This full-band shielding instrument has a built-in soft whip omnidirectional antenna, and the 12-channel RF module works independently, which is convenient for upgrading and replacement. The full-band shielding device can shield all 2G/3G/4G/5G/Bluetooth/WiFi signals. Effective shielding range: radius 0-30 meters (-75dBm, indoor transparent environment, depending on the distance of surrounding base stations)
