How to use gps jammer to shield signal? Different cellular systems handle different and different signals, but all networks are easily interrupted, so basic radio signals are used. GSM2 (Digital Cellular System and PCS System) operates in the 900MHz and 1800MHz frequency bands in Asia or Europe and the 1900MHz frequency band in the north. Based on this principle, mobile phone smartphone jammers are designed to block signals from nearby base stations. In either case, if the call is unacceptable, you need to buy a mobile phone signal jammer to maintain control and set time.
The jammer can prevent radio communications on devices operating at a specific radio frequency within that range (that is, within a specific distance of the jammer) by emitting a noisy radio carrier. GPS jammers will produce 1575.42 Mhz interference to prevent GPS devices from receiving correct positioning signals. GPS jammers are usually powered by small batteries and transmit signals in a small radius.
The second is a derivative product of the Russian system manufactured in North Korea. It is considered to have similar functions, but is cheaper on the open market. South Korean intelligence said that North Korea purchased a new 24-watt jammer from Russia in early 2010. This will interfere with GPS reception within a 400 km radius, basically covering the entire Korean Peninsula.