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Radio jamming is the deliberate blocking of or interference with wireless communications. [ 1 ] [ 2 ] In some cases, jammers work by the transmission of radio signals that disrupt telecommunications by decreasing the signal-to-noise ratio .
Example of a mobile phone jammer, produced by Jammerspro. A mobile phone jammer or blocker is a device which deliberately transmits signals on the same radio frequencies as mobile phones, disrupting the communication between the phone and the cell-phone base station, effectively disabling mobile phones within the range of the jammer, preventing them from receiving signals and from transmitting ...
Radar jammer, a device used in radar jamming and deception; Radio jammer, a device used in radio jamming; Radio-controlled Improvised Explosive Device jammer, a counter-IED device; Mobile phone jammer, an instrument used to prevent cellular phones from receiving signals from base stations
Estonia has accused neighbouring Russia of jamming GPS navigation devices in airspace above the Baltic states, echoing concerns from airlines that say they have been contending with such ...
Jamming (knot), the tendency of knots to become difficult to untie; Interfering with communications or surveillance: Radio jamming; Radar jamming and deception; Mobile phone jammer; Echolocation jamming; Radio-controlled improvised explosive device jamming, a counter-IED technique; Jamming (physics), an apparent change of physical state
The most important method to counter radar jammers is operator training. Any system can be fooled with a jamming signal but a properly trained operator pays attention to the raw video signal and can detect abnormal patterns on the radar screen. The best indicator of jamming effectiveness to the jammer is countermeasures taken by the operator.
CTCSS is an analog system. A later Digital-Coded Squelch (DCS) system was developed by Motorola under the trademarked name Digital Private Line (DPL). General Electric responded with the same system under the name of Digital Channel Guard (DCG).
The iPhone Stereo Headset was introduced in 2007 and was bundled with the original iPhone and iPhone 3G, and featured a control capsule in-line with the left earbud's wire with a microphone and a single button, actuated by squeezing the unit, which can be programmed to control calls, presentations, music and video playback, launch Siri, or take pictures with the Camera application.