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  2. Trunked radio system - Wikipedia

    en.wikipedia.org/wiki/Trunked_radio_system

    A trunked radio system is a two-way radio system that uses a control channel to automatically assign frequency channels to groups of user radios. In a traditional half-duplex land mobile radio system a group of users (a talkgroup ) with mobile and portable two-way radios communicate over a single shared radio channel, with one user at a time ...

  3. Sanwa Electronic - Wikipedia

    en.wikipedia.org/wiki/Sanwa_Electronic

    In August that year it launched its first radio-controlled transmitter, the Mini Propo, and in 1976, Sanwa became an independent company. Its M-sechs wheeled transmitter was the recipient of the Good Design Award in 1990. [1] In 1985, Sanwa diversified into the production of remote controls for domestic and industrial purposes. [2]

  4. Two-way radio - Wikipedia

    en.wikipedia.org/wiki/Two-way_radio

    Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...

  5. Radio scanner - Wikipedia

    en.wikipedia.org/wiki/Radio_scanner

    An Icom IC-R5 hand-held scanner A GMRS radio that also has scanning capabilities. A scanner (also referred to as a radio scanner) is a radio receiver that can automatically tune, or scan, two or more discrete frequencies, stopping when it finds a signal on one of them and then continuing to scan other frequencies when the initial transmission ceases.

  6. Land mobile radio system - Wikipedia

    en.wikipedia.org/wiki/Land_mobile_radio_system

    A land mobile radio system (LMRS) is a person-to-person voice communication system consisting of two-way radio transceivers (an audio transmitter and receiver in one unit) which can be stationary (base station units), mobile (installed in vehicles), or portable (handheld transceivers e.g. "walkie-talkies").

  7. Transceiver - Wikipedia

    en.wikipedia.org/wiki/Transceiver

    In a wired telephone, the handset contains the transmitter (for speaking) and receiver (for listening). Despite being able to transmit and receive data, the whole unit is colloquially referred to as a "receiver". On a mobile telephone or other radiotelephone, the entire unit is a transceiver for both audio and radio.

  8. Professional mobile radio - Wikipedia

    en.wikipedia.org/wiki/Professional_mobile_radio

    The term PMR is often used by the public and magazine publishing to refer to the low power (500 milliwatt) PMR446 license exempt radio systems that consist of sixteen FM frequencies between 446.00625 and 446.19375 MHz for analog FM and thirty-two FDMA (digital) channels between 446.003125 and 446.196875 MHz. These are used for personal or ...

  9. Multimeter - Wikipedia

    en.wikipedia.org/wiki/Multimeter

    Analog multimeter Digital multimeter. A multimeter (also known as a volt-ohm-milliammeter, volt-ohmmeter or VOM) [1] is a measuring instrument that can measure multiple electrical properties. [2] [3] A typical multimeter can measure voltage, resistance, and current, [4] in which case can be used as a voltmeter, ohmmeter, and ammeter.

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