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  2. Amateur television - Wikipedia

    en.wikipedia.org/wiki/Amateur_television

    Amateur television (ATV) is the transmission of broadcast quality video and audio over the wide range of frequencies of radio waves allocated for radio amateur (Ham) use. [1] ATV is used for non-commercial experimentation, pleasure, and public service events.

  3. Amateur radio repeater - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_repeater

    Amateur television (ATV) repeaters are used by amateur radio operators to transmit full motion video. The bands used by ATV repeaters vary by country, but in the US a typical configuration is as a cross-band system with an input on the 33 or 23 cm band and output on 421.25 MHz or, sometimes, 426.25 MHz (within the 70 cm band).

  4. List of amateur radio modes - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio_modes

    Morse code is called the original digital mode. Radio telegraphy, designed for machine-to-machine communication is the direct on / off keying of a continuous wave carrier by Morse code symbols, often called amplitude-shift keying or ASK, may be considered to be an amplitude modulated mode of communications, and is rightfully considered the first digital data mode.

  5. CTV Atlantic - Wikipedia

    en.wikipedia.org/wiki/CTV_Atlantic

    CTV Atlantic (formerly known as the Atlantic Television System, or ATV) is a system of four television stations in the Maritimes, owned and operated by the CTV Television Network, a division of Bell Media. Despite the name, it is not available on basic cable or analog in Newfoundland and Labrador even though that province is part of Atlantic ...

  6. List of amateur radio software - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio_software

    Software License Operating Systems Features Amateur Contact Log by N3FJP Proprietary Windows Logging, Transceiver control, Callbook lookup, QSL handling (Hardcopy / LoTW / eQSL / Club Log), Awards, DX Spots, Digital Modes

  7. Wide-coverage Internet Repeater Enhancement System

    en.wikipedia.org/wiki/Wide-Coverage_Internet...

    WIRES II - Yaesu did terminate WIRES-II service on Saturday, September 30, 2017 at 06:00 UTC. They suggested in the future, to use the WIRES-X Internet linking system. [2] [3] WIRES-X - Supports the C4FM digital and the voice technology. It enables high sound quality by repeating C4FM digital data as it is via the Internet.

  8. 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 ...

  9. Packet radio - Wikipedia

    en.wikipedia.org/wiki/Packet_radio

    Packet radio started becoming more and more popular across North America and by 1984 the first packet-based bulletin board systems began to appear. Packet radio proved its value for emergency operations following the crash of an Aeromexico airliner in a neighborhood in Cerritos, California, in August 1986. Volunteers linked several key sites to ...

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