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  2. High Frequency Data Link - Wikipedia

    en.wikipedia.org/wiki/High_Frequency_Data_Link

    High Frequency Data Link (HFDL) is an ACARS communications medium used to exchange data such as Aeronautical Operational Control (AOC) messages, Controller Pilot Data Link Communications (CPDLC) messages and Automatic Dependent Surveillance (ADS) messages between aircraft end-systems and corresponding ground-based HFDL ground stations.

  3. WSPR (amateur radio software) - Wikipedia

    en.wikipedia.org/wiki/WSPR_(amateur_radio_software)

    The program is designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands. WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Transmissions carry a station's callsign, Maidenhead grid locator, and transmitter power in dBm.

  4. Automatic link establishment - Wikipedia

    en.wikipedia.org/wiki/Automatic_Link_Establishment

    Automatic Link Establishment, commonly known as ALE, is the worldwide de facto standard for digitally initiating and sustaining HF radio communications. [1] ALE is a feature in an HF communications radio transceiver system that enables the radio station to make contact, or initiate a circuit, between itself and another HF radio station or network of stations.

  5. Comparison of file-sharing applications - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_file-sharing...

    File sharing is a method of distributing electronically stored information such as computer programs and digital media. This article contains a list and comparison of file sharing applications; most of them make use of peer-to-peer file sharing technologies. This comparison also contains download managers that

  6. AN/ARC-190 - Wikipedia

    en.wikipedia.org/wiki/AN/ARC-190

    The ARC-190 is a military HF radio that operates between 2-30 MHz and transmits at 300+ watts.It features a dual heterodyne receiver/transmitter that uses IF frequencies of 97.8 and 1.8 MHz, an antenna coupler that is pressurized to 7±1 PSI with dry nitrogen (air) which (1) prevents high voltage arcing, (2) prevents corrosion, (3) provides a uniform cooling medium, and one of various controls ...

  7. List of amateur radio transceivers - Wikipedia

    en.wikipedia.org/wiki/List_of_amateur_radio...

    Kit Single band 80m / 40m / 30m / 20m 2 CW Yes Mosquita III Kit 40m 5 CW No [51] Nouveau 75A Kit 80M 5 (Carrier) / 20 PEP AM: Yes Splinter II Kit 40m 0.5 CW Yes OHR 100A Kit 80m / 40m / 30m / 20m / 15m 5 (4–4.5 on 15m) CW Yes BCR Blue Cool Radio Kit (80m) / 40m / 30m / 20m / 17m 5 CW No [51] QRPGuys DSB Digital Transceiver II Kit 40m / 30m / 20m

  8. Military Auxiliary Radio System - Wikipedia

    en.wikipedia.org/wiki/Military_Auxiliary_Radio...

    However, modern military aircraft are still equipped with HF radios, and many military aircrews still use MARS Phone Patches as a backup or substitute to Satellite Communications. The USAF MARS Phone Patch Net Archived August 15, 2015, at the Wayback Machine provides 24/7 HF Radio Phone Patch service to all branches of United States military ...

  9. File sharing - Wikipedia

    en.wikipedia.org/wiki/File_sharing

    "File-sharing proponents commonly argue that file-sharing democratizes music consumption by 'levelling the playing field' for new/small artists relative to established/popular artists, by allowing artists to have their work heard by a wider audience, lessening the advantage held by established/popular artists in terms of promotional and other ...