welcome to HISEA
source:Industry News release time:2021-08-11 Article author:sznbone Popular:Prison Jamming system
In China, signal jammers have become standard test room equipment in the examination room. For example, high school and college entrance examinations, postgraduate exams, civil service exams, and various qualification certificate exams, signal jammers are used to prevent candidates from passing wireless signals (mobile phones) Contact the outside world to prevent cheating in the examination room. How does the signal jammer interfere with the mobile phone signal and Internet signal? Let's first understand how it works.
The working principle of the signal jammer is based on the uplink and downlink channels of the mobile phone system, using techniques such as frequency multiplication and frequency division filtering to analyze the required shielding frequency, and customize a spherical shielding space according to the power of the shielding device, and interfere with the frequency emitted by itself The mobile phone receives the frequency sent by the base station and the wireless router, and automatically forms a shielding magnetic field within the specified range, so as to achieve the purpose of shielding the signal.
The signal jammer can shield the 2G/3G/4G/5G/WiFi signal of the mobile phone, so that the mobile phone cannot work normally, and can effectively prevent students from cheating using mobile phones and other electronic devices. It is precisely because of the excellent interference effect of the mobile phone signal jammer that it has become one of the necessary equipment in many examination places.
Both the country and the government are rigorously investigating cheating. The current cheating is not just the cheating method of cheating notes, but also the cheating method of searching for answers on the Internet and sending text messages to communicate with the outside world. For this kind of cheating The behavior may not be discovered in time. Therefore, it is reasonable to carry out detection through such equipment. The signal jammer is very convenient to use, it can be used when plugged in, and it can be turned off when not in use. This not only can effectively prevent cheating, but also does not affect the normal use of mobile phones after the exam.
Mobile phone signal jammers are mainly aimed at all kinds of places where the use of mobile phones is prohibited, such as various examination rooms, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, governments, finance, prisons, public security, and military centers. It is understood that the mobile phone signal jammers on the market can limit the mobile phone signals 500M meters away from the launching station. The shielding radius is adjustable, and the coverage area is more than 30 square meters. The mobile phone signal jammer can only shield the mobile phone signal without affecting other electronic devices.
Read recommendations:
10 Band 2g 3G 4G Portable Mobile Cell Phone Signal Jammers Blocker Handheld Jammer
WiFi jammers block hidden camera
How does the signal jammer work?DDS Jammers Production
Exam special shielding device creates a fair examination environment
Popular recommended products
Waterproof Portable 360 Degree Anti UAV Drone Jammer
2020-09-244G/5G Signal Jammer (14 bands)
2020-11-10Portable HS-V8J High-Power DDS Jammer
2020-09-14High Power Handheld Signal Jammer HS-P8J
2020-09-15Portable Handheld RF Signal Jammer, Car Lock Remote Control Blocker, 10W Jam Up To 100m
2022-01-13Related Information
Jammers can reduce myopia
2021-09-24How do judicial departments and procuratorates prevent recordings?
2021-09-11CN 5G Mobile Users Approximate 740M at End-Sep: MIIT
2023-10-25Can jammers block the Bluetooth frequency band?
2021-10-13If there is no cell phone signal jammer in the prison
2021-05-19the function of GPS jammer
2021-04-16How to block phone tapping?
2021-08-27Prevent recording|How to prevent malicious recording?
2020-12-02Cell phone jammer blocks any call signals
2021-12-21Russian college entrance examination also uses mobile phone signal shielding equipment to prevent ch
2021-08-05Here is a good high-power GPS LoJack WiFi 3G 4G mobile phone jammer
2020-11-24China to march toward modernization, set to overcome headwinds with institutional advantage
2022-10-22Why is the mobile phone signal jammer a must-have device during school exams?Meeting room jammer
2021-10-09Drone jammer blocks aerial cameras
2021-11-27Recommended recording jammer with good interference effect
2021-06-02What equipment is needed for anti-recording in the conference room?
2020-12-15Latest Galileo satellites join constellation with enhanced, faster fix
2022-09-29Is the cheating in the examination room because the old-style jammer cannot shield the 5G signal?
2021-08-04Benefits of High Power Signal Jammer
2021-05-06Can I jam a drone signal?
2021-09-01Interfering products
Low-altitude defense drone portable equipment
2023-11-20Mobile Phone Cellular Signal Booster GSM PCS Network Repeater for Garage Basement Signal Repeat
2023-11-092W Mobile Phone Signal Repeater 1800 2100 2600 MHz Tri-Band 33dBm Network Booster
2023-11-093G Signal Repeater Mobile Phone Signal Booster
2023-11-09Portable Signal Jammer Full Band 21 Channels 2g 3G 4G 5g Mobile Phone Network Lojack Walky Talky Signal Jammer
2023-11-01Professional all-round 360-degree recording jammer air purifier type anti-recording equipment
2023-11-01Anti Spy Remote Control Portable Audio Voice Recording Jammer up to 2m white noise to Privacy Protection
2023-11-01Recording blocker protect your voice information security,air purifier type anti-recording equipment
2023-10-312000m Detection Handheld Drone (UAS) Detection Warning Instrument Detector Dji, Autel and Fpv Drones
2023-10-27Handheld Drone/Uavs Detecter for Detecting Dji/Autel/ Fpv Drones up to 2km
2023-10-25with 2km Drone Controlled Signals WiFi Drone Signal Jammer GSM 900MHz WiFi 2.4GHz 5.8GHz Anti Drone System
2023-10-25Unique Handheld 28 Bands 27 Antennas Wi-Fi6e FM Radio GSM 3G 4G 5g Mobile Phone Jammer
2023-10-23Handheld 24 Antennas 5g Cellphone Signal Jammer with Nylon Cover
2023-10-23Convoy 12 bands RCIED Bomb Jammer
2023-10-23Vehicle Mounted Drone Detection Jamming Integrated Uav Detection, Positioning, and Countermeasures Blocking Units
2023-10-17Portable Drone Detector aeroscope mobile works offline or online can find controller pilot position detection device up to 10km
2023-10-05Vehicle Use-Signal jammer detector for uniform services
2023-09-20Anti-Theft Jammer Detector for Local Command Center
2023-09-20Portable Cellphone Jamming Detector
2023-09-19M8000 RF Signal Detector Anti Spy Tracker Wifi Camera GSM Audio Bug Sweeper
2023-09-188km Ku Band Microwave Alarm Security System Ground Surveillance Monitor/Detector/Sensor/Radar
2023-07-31Full Band Drone Jamming and Navigation Spoofing
2023-07-318kms 300MHz~6GHz RF Uav All Frequency Detection Direction Finding Equipment
2023-07-311.2G 100W anti drone module
2023-07-211.2G 50W anti drone module
2023-07-211.2G 30W anti drone module
2023-07-211.2G 10W/20W anti drone module
2023-07-21Portable anti UAV anti drone Systems 4 bands with removable battery for 1500m
2023-07-21Built-in antenna Phone Signal Jammer Blocker 2g/3G/4G/5g L1 WiFi Camera for room
2023-02-28Portable Handheld RF Signal Jammer, Car Lock Remote Control Blocker, 10W Jam Up To 100m
2022-01-13Start a conversation to know more about what we have for you…
Get in touchEnter your email for exclusive offers and information on new upcoming products.
product
solution
about us
service
news
