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One radio faces the satellite, while the other radio faces the area not in direct coverage. The two radios relay the signals (rather than store-and-forward data bits) and must be isolated from each other to prevent feedback. The satellite-facing radio listens to the satellite and must be isolated from the transmitter repeating the signal.
Originally the terms were used interchangeably but nowadays most radio users use the term "jamming" to describe the deliberate use of radio noise or signals in an attempt to disrupt communications (or prevent listening to broadcasts) whereas the term "interference" is used to describe unintentional forms of disruption (which are far more common ...
In hand-held radios, an LED indicator may glow green, yellow, or orange to indicate another user is talking on the channel. Hand-held radios usually have a switch or push-button to monitor. Some modern radios have a feature called "Busy Channel Lockout", which will not allow the user to transmit as long as the radio is receiving another signal.
Jammers or radio frequency “shields” are also a frequent topic of discussion in online forums dedicated to people who believe that the government or others are singling them out for in-depth ...
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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 ...