jammers can block various types of communication equipment
It is understood that mobile phone signal jammers on the market can limit mobile phone signals that are 500M meters away from the transmitting station and have a radius of >20 meters. The interference radius is adjustable, it only interferes with the mobile phone signal, and does not affect other electronic devices. Save power, the power is 20W-480w. When the mobile phone works, it is within a certain frequency range, the mobile phone and the base station are connected by radio waves, and the data and sound transmission are completed with a certain baud rate and modulation method. Aiming at this communication principle, the mobile phone signal jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during operation. The mobile phone is manifested as a search network, no signal, no service system and other phenomena. Common mobile phone signal portable jammer on the market have operating frequencies: 869~894MHz; 825~960MHz; 1805~1880MHz and 1900~1990MHz, etc. The operating frequency bands are CDMA800, GSM900, DCS1800, PCS1900, WCDMA, etc. It can control a range of about 40 meters in diameter, using a DC-DC converter input voltage and 5V output voltage.
Effectively interfere with various walkie-talkie signals, block (interference) the communication between the walkie-talkie and the receiver, so that various types of wireless invisible headsets grafted to the walkie-talkie system (including anti-interference and anti-detection headsets) cannot work normally (strong noise) Or no sound) only interferes with the walkie-talkie signal and does not affect the normal operation of other electronic equipment. It is green and environmentally friendly. The amount of electromagnetic radiation has passed the "Environmental and Health Related Product Safety Institute of the Chinese Center for Disease Control and Prevention" (this unit is a national authoritative certification for electromagnetic radiation detection Strict testing by institutions), the measured value of electromagnetic field intensity at each sampling point is far lower than the "Electromagnetic Radiation Protection Regulations" (GB8702-88), which has no impact on the human body. The low power only interferes with the signal of the intercom or receiver in the examination room. The walkie-talkie outside the examination room does not interfere with the built-in switching power supply to ensure the stability and accuracy of the signal.
The interference range of the shield is related to the strong electromagnetic field at the interference site and the distance from the communication station. Generally the best is 200 meters away. The manufacturer tests under normal conditions, so the range of the jammer will be a little different. Regarding radiation, as long as electronic products are large and small, there will be radiation. Any piece of electrical equipment will have radiation. Just like the mobile phones we usually use, it is inevitable that there will be radiation when leaning against our ears every day. The country has also set a standard for mobile phone radiation, and the radiation generated by our mobile phone signal jammers is much lower than the national standard, and it is not every day. Lean against the ears, so there is almost no harm to the human body.