welcome to HISEA
source:Industry News release time:2020-12-01 Article author:sznbone Popular:Prison Jamming system
Cell phone jammer interferes with the digital signal in the frequency band by sending high-power triangular waves. If the antenna is placed unreasonably, or the distance is long, or there are obstacles in the middle, it will affect the interference effect.
First, test whether the mobile phone is also interfered near the antenna. If you can talk normally here, it means that the cell phone jammer is faulty or the antenna is not connected properly. Of course, the setting may be incorrect.
Cell phone jammer has frequency bands, and different mobile phones have different frequency bands used for interference. There are two types of GSM, 900M and 1800M. The uplink frequency of narrowband CDMA is: 824MHz-849MHz, and the downlink frequency is: 869MHZ-894MHZ. PHS is a 2G frequency band, so they are different. The jammer should have a specific logo.
Now the school’s cell phone signal jammer is full-band, it can shield all the 2G 3G 4G signals and 2.4G WIFI signals and Bluetooth signals under all the three operators of China Mobile, China Unicom and Telecom.
Some posts say that after turning off the automatic selection of mobile phone network operators, it will not be blocked if it becomes manually selected. In fact, this is not correct because the mobile phone blocker is for all mobile phone frequencies under the three operators It is shielded, so no matter how it is switched, it will be shielded, which means that no matter what the mobile phone card is, it is within the shielding range of the shielding device.
This cannot be avoided by cracking the number and band, because no matter which number or band you use, it is within its shielding range.
There is also Bluetooth software that is not acceptable, because its frequency will also be blocked by the shield.
The only way is to install a mobile phone signal amplifier near the place where the mobile phone signal jammer is used to counter it. When the mobile phone signal becomes stronger, the jammer will be more difficult to shield.
Read recommendations:
HS-MP58J Military Green Manpack DDS UAV Jammer
Why not to try the High Power Cell Phone WIFI Signal Jammer?
Is the cheating in the examination room because the old-style jammer cannot shield the 5G signal?
Popular recommended products
Portable Handheld RF Signal Jammer, Car Lock Remote Control Blocker, 10W Jam Up To 100m
2022-01-13Portable HS-V8J High-Power DDS Jammer
2020-09-144G/5G Signal Jammer (14 bands)
2020-11-10Waterproof Portable 360 Degree Anti UAV Drone Jammer
2020-09-24High Power Handheld Signal Jammer HS-P8J
2020-09-15Related Information
2021 The latest anti-recording jammer is here, which effectively guarantees the safety of your conve
2021-10-11Jammers have been used in war
2021-09-27Applicable Places for The Cell Phone Jammer
2020-10-13Cell phone jammer function
2020-12-015G jammers will soon replace 4G signal blockers
2021-05-28Can't prevent recording? Record jammer to prevent recording?
2020-12-15Why are these GPS jammers so popular?
2020-11-09Benefits of High Power Signal Jammer
2021-05-06The installation of "mobile phone signal jammers" in schools is a responsible performance
2020-12-07What can a GPS jammer do?
2021-08-16Exam special shielding device creates a fair examination environment
2020-11-20How to choose the right jammer?
2020-12-02How to choose the suitable signal shielding manufacturer
2020-10-26"The most stringent in history" college entrance examination:
2020-11-27Army to procure jammer system to thwart radio, cell phone IED attacks
2021-10-26How to deal with that possibly deadly recording pen? The anti-recording artifact is here!
2020-12-03About the validation of laboratory data of test signal jammer
2020-11-28What should I pay attention to when installing and using mobile phone signal shielding equipment?
2020-09-25Car use Mini GPS Jammer!Mini GPS Jammer
2020-10-27Blockers can prevent and prevent cheating
2020-11-06Interfering 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
