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  2. Call signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Call_signs_in_the_United...

    The first letter for standard amateur stations came from the range A-W. For Experimental stations, the first letter was "X", a practice that is still followed. "Y" was reserved for Technical and Training School stations, and "Z" for Special Amateurs. [29] More letters were added as the number of stations grew.

  3. Digital subchannel - Wikipedia

    en.wikipedia.org/wiki/Digital_subchannel

    For example, if the call letters are WFRC and the station broadcasts on channel 10, then the 10.2 subchannel is identified as EFRC, 10.3 is GFRC, 10.4 is HFRC, 10.5 is IFRC and 10.6 is JFRC. If the call letters are KFRC and the station broadcasts on channel 10, then 10.2 is identified as NFRC, 10.3 is OFRC, 10.4 is QFRC, 10.5 is RFRC and 10.6 ...

  4. List of United States over-the-air television networks

    en.wikipedia.org/wiki/List_of_United_States_over...

    Most were broadcast in the aspect ratio to which they were originally produced. However, due to the network's native 4:3 transmission, films presented in widescreen are presented with letterboxing). The network began incorporating classic television series from the 1960s to the 2000s into its schedule in 2017, and transitioned full-time to that ...

  5. List of ESPN Radio affiliates - Wikipedia

    en.wikipedia.org/wiki/List_of_ESPN_Radio_affiliates

    95.5-4 FM Paris: TX: ESPN Paris 105.1 KGKL: 960 AM San Angelo: TX: ESPN Radio 960 KTFM: 94.1 FM San Antonio: TX: San Antonio's Sports Star KZDC: 1250 AM San Antonio: TX: ESPN 1250 KTFS: 740 AM Texarkana: TX: ESPN 105.9 KSEY: 1230 AM Vernon: TX: ESPN 1230 KRZI: 1660 AM Waco: TX: ESPN Central Texas KALL: 700 AM Salt Lake City: UT: ESPN 700 Sports ...

  6. List of MeTV affiliates - Wikipedia

    en.wikipedia.org/wiki/List_of_MeTV_affiliates

    Channel 47.1 converted to general entertainment independent station upon disaffiliation, while 47.4 went dark; 47.1 and 47.4 are now affiliated with (respectively) Stadium and TBD: Green Bay, Wisconsin: WGBA-TV: 26.2: 14: E.W. Scripps Company: 2011–2022: Subchannel now Defy TV: Johnson City, Tennessee: WJHL-DT2: 11.2: 11: Media General: 2011 ...

  7. Glossary of broadcasting terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_broadcasting_terms

    Also AM radio or AM. Used interchangeably with kilohertz (kHz) and medium wave. A modulation technique used in electronic communication where the amplitude (signal strength) of the wave is varied in proportion to that of the message signal. Developed in the early 1900s, this technique is most commonly used for transmitting an audio signal via a radio wave measured in kilohertz (kHz). See AM ...

  8. Numbers station - Wikipedia

    en.wikipedia.org/wiki/Numbers_station

    A numbers station is a shortwave radio station characterized by broadcasts of formatted numbers, which are believed to be addressed to intelligence officers operating in foreign countries. [1] Most identified stations use speech synthesis to vocalize numbers, although digital modes such as phase-shift keying and frequency-shift keying , as well ...

  9. Radio in the United States - Wikipedia

    en.wikipedia.org/wiki/Radio_in_the_United_States

    (The United States was also allocated full use of the letter N, and later some of the range for the letter A, but does not allocate those initial letters to broadcasting stations. A small number of U.S. Navy stations with N call signs made broadcasts in the early 20th century, including NOF, NSS and NAA.)