welcome to HISEA
source:Industry News release time:2020-11-30 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:
Portable Full Band VIP Protection Digital Bomb Jammer
High Power DDS Full Band Vehicle Military Convoy Protection Roof Mounted Jammer System 20-6000MHz
Popular recommended products
Portable Handheld RF Signal Jammer, Car Lock Remote Control Blocker, 10W Jam Up To 100m
2022-01-13Waterproof 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
2020-09-15Related Information
Can't prevent recording? Record jammer to prevent recording?
2020-12-15Protect Voice Security-Recording Jammer
2020-12-14About the validation of laboratory data of test signal jammer
2020-11-28How to choose a good 4G signal jammer
2020-11-11Large-Scale 5.5G Network Pilot in Beijing by China Unicom & Huawei
2024-01-30How to stop students from using iPhones in the classroom?
2021-06-19Malaysia PM Anwar considers opening 5G ecosystem to more technology partners
2023-04-17Transforming telcos into ‘techcos’: The future of cloud, AI and 5G at the edge
2025-03-08Recording jammer, effectively prevent mobile phone recording!
2020-12-15High-power multi-purpose signal jammer
2020-11-27Smart phone jammers can meet your confidentiality requirements
2021-11-02How to solve electronic signal cheating? Exam signal jammer shows great power
2020-11-21Selection guide and usage items of special mobile phone signal jammer for examination room
2021-09-13The powerful multifunctional signal jammer is here waiting for you
2020-11-10The working principle of wireless signal jammer
2020-12-01Can 1 test room mobile phone signal jammer shield 1 classroom?
2020-11-30Bluetooth and WiFi are the same frequency?
2021-10-22How to effectively avoid being recorded?
2021-08-24Jammers make life more convenient
2021-10-23Cell phone jammer hold back you are asking phone from surveillance
2021-06-24Interfering products
SSA3000X Plus Series Desktop Style Spectrum Analyzers
2025-04-09HSA-Q1 Handheld RF Spectrum Analyser up to 13.44 GHz
2025-04-09Protek A734 100kHz-4.4GHz Handheld Spectrum Analyser
2025-04-09Low-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 module
2023-07-211.2G 50W Jammer Module
2023-07-211.2G 30W anti drone module
2023-07-211.2G 10W/20W anti drone module
2023-07-21Start 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
