welcome to HISEA
source:Industry News release time:2021-12-07 Article author:sznbone Popular:Prison Jamming system
Our understanding of mobile cell phone jammer probably knows that mobile phone signal jammers can interfere with mobile phone signals. They are used in the examination room to prevent candidates from cheating with mobile phones. It is not clear how signal jammers work and the types of signal jammers.
According to the appearance, signal jammers are divided into built-in antenna jammers and external antenna jammers. The shielding device of the external antenna is a metal shell, and the built-in antenna is a plastic shell. According to the use area and the used area, it can be divided into low power Mobile phone jammers andjammers, if used outdoors, the distance between the floors is relatively long, it is recommended to usemobile phone jammers.
The working principle of the signal jammer is to scan from the low end frequency of the forward channel to the high end at a certain speed during the working process. The scanning speed can cause garbled interference in the message signal received by the mobile phone. The mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station and achieve the purpose of shielding the mobile phone signal. No service system and other phenomena.
Generally speaking, the frequency emitted by the mobile phone jammer interferes with the normal frequency of the mobile phone receiving the base station, making the mobile phone unable to connect to the base station, and thus unable to make calls, receive and send text messages and surf the Internet normally. When the mobile phone signal jammer is turned on, although the mobile phone will have a full signal, there is no signal in actual use.
When the mobile phone jammer is turned on, it only has a shielding effect on the mobile phone, and has no effect on other electronic devices. This is because the electromagnetic signals emitted by the mobile phone signal jammer are completely within the collection working frequency band prescribed by the country, which will only block the communication of the mobile phone. And this signal is always in a relatively static state and will not affect any electronic equipment.
Mobile jammers are not only used in school examination rooms, but also in confidential meeting rooms, prison detention centers, troops and other places. Especially prisons must be equipped with jammers. In order to prevent prisoners from contacting the outside world, mobile phones are not allowed. If cell phone jammers are used in prisons, it is recommended to use signal jammers of large and small power. When the shielding is busy, you can use low-power jammers, and you can use jammers in large areas.
Read recommendations:
4G/5G Signal Jammer (14 bands)
Man-pack High Power Military Jammer
Man-pack portable Anti UAV Drone Jammer
The test signal jammer helps the test room to prevent cheating
Anti-cheating artifact mobile phone signal jammer for college entrance examination
Popular recommended products
Portable Handheld RF Signal Jammer, Car Lock Remote Control Blocker, 10W Jam Up To 100m
2022-01-13High Power Handheld Signal Jammer HS-P8J
2020-09-154G/5G Signal Jammer (14 bands)
2020-11-10Waterproof Portable 360 Degree Anti UAV Drone Jammer
2020-09-24Portable HS-V8J High-Power DDS Jammer
2020-09-14Related Information
How to operate drone jammer?
2021-09-06The development of signal jammers
2021-06-11Can 1 test room mobile phone signal jammer shield 1 classroom?
2020-11-30GPS jammers are very important now
2020-11-06How to detect the control effect of the wireless signal shielding device in the examination room?
2020-11-06Signal jammer becomes the bridge of human communication
2021-09-20Uttar Pradesh Board 10th, 12th Exams 2022: CCTV Cameras Installed At Centres To Curb Cheating
2022-06-29What is a mobile phone jammer?
2020-11-06China's Xizang has over 17,000 5G base stations
2024-12-18Recording jammer to prevent others from recording with mobile phones!
2021-08-27China's anti-drone defences to take centre stage at the Zhuhai air show
2022-11-10The rechargeable battery of the shield will save you a lot of trouble
2020-11-09How to use the school mobile phone signal jammer? Remember these three steps
2021-04-14How is the signal shielding in the examination room realized?
2021-11-15Which occasions cannot without the mobile phone signal jammer
2021-05-26GPS jammer malfunctioned or crashed
2021-12-15The most "black" taxi! Women's mobile phone signals for taxis are blocked
2020-12-11High power drone gun jammer destroy multiple signal frequency bands
2021-05-31Analysis and Research on the Global Market of Mobile Phone Jammers
2021-12-04RF signal jammers: types and characteristics
2021-05-27Interfering 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
