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class="vector-toc-link" href="#By_country"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>By country</span> </div> </a> <button aria-controls="toc-By_country-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle By country subsection</span> </button> <ul id="toc-By_country-sublist" class="vector-toc-list"> <li id="toc-Australia" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Australia"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Australia</span> </div> </a> <ul id="toc-Australia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-New_Zealand" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#New_Zealand"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>New Zealand</span> </div> </a> <ul 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class="vector-toc-list"> </ul> </li> <li id="toc-87.5–87.9_MHz" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#87.5–87.9_MHz"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.4.2</span> <span>87.5–87.9 MHz</span> </div> </a> <ul id="toc-87.5–87.9_MHz-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> </ul> </li> <li id="toc-Unlicensed_operation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Unlicensed_operation"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Unlicensed operation</span> </div> </a> <ul id="toc-Unlicensed_operation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Very high frequency</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 44 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-44" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">44 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D8%B1%D8%AF%D8%AF_%D8%B4%D8%AF%D9%8A%D8%AF_%D8%A7%D9%84%D8%A7%D8%B1%D8%AA%D9%81%D8%A7%D8%B9" title="تردد شديد الارتفاع – Arabic" lang="ar" hreflang="ar" data-title="تردد شديد الارتفاع" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/VHF" title="VHF – Catalan" lang="ca" hreflang="ca" data-title="VHF" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Velmi_kr%C3%A1tk%C3%A9_vlny" title="Velmi krátké vlny – Czech" lang="cs" hreflang="cs" data-title="Velmi krátké vlny" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/VHF" title="VHF – Danish" lang="da" hreflang="da" data-title="VHF" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Ultrakurzwelle" title="Ultrakurzwelle – German" lang="de" hreflang="de" data-title="Ultrakurzwelle" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/VHF-sagedusala" title="VHF-sagedusala – Estonian" lang="et" hreflang="et" data-title="VHF-sagedusala" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A5%CF%80%CE%B5%CF%81%CE%B2%CF%81%CE%B1%CF%87%CE%AD%CE%B1_%CE%BA%CF%8D%CE%BC%CE%B1%CF%84%CE%B1" title="Υπερβραχέα κύματα – Greek" lang="el" hreflang="el" data-title="Υπερβραχέα κύματα" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Frecuencia_muy_alta" title="Frecuencia muy alta – Spanish" lang="es" hreflang="es" data-title="Frecuencia muy alta" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Ultramallongondo" title="Ultramallongondo – Esperanto" lang="eo" hreflang="eo" data-title="Ultramallongondo" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%A8%D8%B3%D8%A7%D9%85%D8%AF_%D8%A8%D8%B3%DB%8C%D8%A7%D8%B1%D8%A8%D8%A7%D9%84%D8%A7" title="بسامد بسیاربالا – Persian" lang="fa" hreflang="fa" data-title="بسامد بسیاربالا" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Tr%C3%A8s_haute_fr%C3%A9quence" title="Très haute fréquence – French" lang="fr" hreflang="fr" data-title="Très haute fréquence" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/VHF" title="VHF – Galician" lang="gl" hreflang="gl" data-title="VHF" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%B4%88%EB%8B%A8%ED%8C%8C" title="초단파 – Korean" lang="ko" hreflang="ko" data-title="초단파" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B3%D5%A5%D6%80%D5%AF%D5%A1%D6%80%D5%B3_%D5%A1%D5%AC%D5%AB%D6%84%D5%B6%D5%A5%D6%80" title="Գերկարճ ալիքներ – Armenian" lang="hy" hreflang="hy" data-title="Գերկարճ ալիքներ" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%85%E0%A4%A4%E0%A4%BF_%E0%A4%89%E0%A4%9A%E0%A5%8D%E0%A4%9A_%E0%A4%86%E0%A4%B5%E0%A5%83%E0%A4%A4%E0%A4%BF" title="अति उच्च आवृति – Hindi" lang="hi" hreflang="hi" data-title="अति उच्च आवृति" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Frekuensi_sangat_tinggi" title="Frekuensi sangat tinggi – Indonesian" lang="id" hreflang="id" data-title="Frekuensi sangat tinggi" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Metrabylgja" title="Metrabylgja – Icelandic" lang="is" hreflang="is" data-title="Metrabylgja" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Very_high_frequency" title="Very high frequency – Italian" lang="it" hreflang="it" data-title="Very high frequency" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Ultrar%C3%B6vidhull%C3%A1m" title="Ultrarövidhullám – Hungarian" lang="hu" hreflang="hu" data-title="Ultrarövidhullám" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9C%D0%BD%D0%BE%D0%B3%D1%83_%D0%B2%D0%B8%D1%81%D0%BE%D0%BA%D0%B0_%D1%87%D0%B5%D1%81%D1%82%D0%BE%D1%82%D0%B0" title="Многу висока честота – Macedonian" lang="mk" hreflang="mk" data-title="Многу висока честота" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Frekuensi_sangat_tinggi" title="Frekuensi sangat tinggi – Malay" lang="ms" hreflang="ms" data-title="Frekuensi sangat tinggi" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%A5%D1%8D%D1%82_%D0%B1%D0%BE%D0%B3%D0%B8%D0%BD%D0%BE_%D0%B4%D0%BE%D0%BB%D0%B3%D0%B8%D0%BE%D0%BD" title="Хэт богино долгион – Mongolian" lang="mn" hreflang="mn" data-title="Хэт богино долгион" data-language-autonym="Монгол" data-language-local-name="Mongolian" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Very_high_frequency" title="Very high frequency – Dutch" lang="nl" hreflang="nl" data-title="Very high frequency" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%85%E0%A4%A4%E0%A4%BF_%E0%A4%89%E0%A4%9A%E0%A5%8D%E0%A4%9A_%E0%A4%86%E0%A4%B5%E0%A5%83%E0%A4%A4%E0%A4%BF" title="अति उच्च आवृति – Nepali" lang="ne" hreflang="ne" data-title="अति उच्च आवृति" data-language-autonym="नेपाली" data-language-local-name="Nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E8%B6%85%E7%9F%AD%E6%B3%A2" title="超短波 – Japanese" lang="ja" hreflang="ja" data-title="超短波" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Veldig_h%C3%B8y_frekvens" title="Veldig høy frekvens – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Veldig høy frekvens" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Veldig_h%C3%B8g_frekvens" title="Veldig høg frekvens – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Veldig høg frekvens" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-mhr mw-list-item"><a href="https://mhr.wikipedia.org/wiki/%D0%A3%D0%BB%D1%8C%D1%82%D1%80%D0%B0%D0%BA%D3%B1%D1%87%D1%8B%D0%BA_%D1%82%D0%BE%D0%BB%D0%BA%D1%8B%D0%BD" title="Ультракӱчык толкын – Eastern Mari" lang="mhr" hreflang="mhr" data-title="Ультракӱчык толкын" data-language-autonym="Олык марий" data-language-local-name="Eastern Mari" class="interlanguage-link-target"><span>Олык марий</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Fale_metrowe" title="Fale metrowe – Polish" lang="pl" hreflang="pl" data-title="Fale metrowe" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Frequ%C3%AAncia_muito_alta" title="Frequência muito alta – Portuguese" lang="pt" hreflang="pt" data-title="Frequência muito alta" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ksh mw-list-item"><a href="https://ksh.wikipedia.org/wiki/UKW_(Funk)" title="UKW (Funk) – Colognian" lang="ksh" hreflang="ksh" data-title="UKW (Funk)" data-language-autonym="Ripoarisch" data-language-local-name="Colognian" class="interlanguage-link-target"><span>Ripoarisch</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%B5%D1%82%D1%80%D0%BE%D0%B2%D1%8B%D0%B5_%D0%B2%D0%BE%D0%BB%D0%BD%D1%8B" title="Метровые волны – Russian" lang="ru" hreflang="ru" data-title="Метровые волны" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Very_high_frequency" title="Very high frequency – Simple English" lang="en-simple" hreflang="en-simple" data-title="Very high frequency" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Ve%C4%BEmi_kr%C3%A1tke_vlny" title="Veľmi krátke vlny – Slovak" lang="sk" hreflang="sk" data-title="Veľmi krátke vlny" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%92%D1%80%D0%BB%D0%BE_%D0%B2%D0%B8%D1%81%D0%BE%D0%BA%D0%B5_%D1%84%D1%80%D0%B5%D0%BA%D0%B2%D0%B5%D0%BD%D1%86%D0%B8%D1%98%D0%B5" title="Врло високе фреквенције – Serbian" lang="sr" hreflang="sr" data-title="Врло високе фреквенције" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Vrlo_visoka_frekvencija" title="Vrlo visoka frekvencija – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Vrlo visoka frekvencija" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/VHF_(taajuusalue)" title="VHF (taajuusalue) – Finnish" lang="fi" hreflang="fi" data-title="VHF (taajuusalue)" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/VHF" title="VHF – Swedish" lang="sv" hreflang="sv" data-title="VHF" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%85%E0%AE%A4%E0%AE%BF_%E0%AE%89%E0%AE%AF%E0%AE%B0%E0%AF%8D_%E0%AE%85%E0%AE%A4%E0%AE%BF%E0%AE%B0%E0%AF%8D%E0%AE%B5%E0%AF%86%E0%AE%A3%E0%AF%8D" title="அதி உயர் அதிர்வெண் – Tamil" lang="ta" hreflang="ta" data-title="அதி உயர் அதிர்வெண்" data-language-autonym="தமிழ்" 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id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=VHF&redirect=no" class="mw-redirect" title="VHF">VHF</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Electromagnetic wave range of 30-300 MHz</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"VHF" redirects here. For the diseases, see <a href="/wiki/Viral_hemorrhagic_fever" title="Viral hemorrhagic fever">Viral hemorrhagic fever</a>.</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Antenna.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/76/Antenna.jpg/220px-Antenna.jpg" decoding="async" width="220" height="299" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/76/Antenna.jpg/330px-Antenna.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/76/Antenna.jpg/440px-Antenna.jpg 2x" data-file-width="1863" data-file-height="2532" /></a><figcaption>VHF <a href="/wiki/Television_antenna" title="Television antenna">television antennas</a> used for <a href="/wiki/Broadcast_television" class="mw-redirect" title="Broadcast television">broadcast television</a> reception. These six antennas are a type known as a <a href="/wiki/Yagi-Uda_antenna" class="mw-redirect" title="Yagi-Uda antenna">Yagi antenna</a>, which is widely used on VHF.</figcaption></figure> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox hproduct"><caption class="infobox-title fn" style="padding-bottom:0.2em;"><span class="fn">Very high frequency</span></caption><tbody><tr><th scope="row" class="infobox-label" style="padding-top:0.15em;padding-right:1.0em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Frequency range</div></th><td class="infobox-data"><span class="nowrap">30 <a href="/wiki/Megahertz" class="mw-redirect" title="Megahertz">MHz</a> to 300 <a href="/wiki/Megahertz" class="mw-redirect" title="Megahertz">MHz</a></span></td></tr><tr><th scope="row" class="infobox-label" style="padding-top:0.15em;padding-right:1.0em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Wavelength range</div></th><td class="infobox-data"><span class="nowrap">10 to 1 m</span></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist 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.sidebar{width:100%!important;clear:both;float:none!important;margin-left:0!important;margin-right:0!important}}body.skin--responsive .mw-parser-output .sidebar a>img{max-width:none!important}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-list-title,html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle{background:transparent!important}html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle a{color:var(--color-progressive)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-list-title,html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle{background:transparent!important}html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle a{color:var(--color-progressive)!important}}@media print{body.ns-0 .mw-parser-output .sidebar{display:none!important}}</style><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><table class="sidebar nomobile nowraplinks"><tbody><tr><th class="sidebar-title"><a href="/wiki/Radio_spectrum" title="Radio spectrum">Radio bands</a></th></tr><tr><th class="sidebar-heading" style="background:#ddddff;"> <a href="/wiki/ITU_radio_bands" class="mw-redirect" title="ITU radio bands">ITU </a></th></tr><tr><td class="sidebar-content" style="padding-top:0.2em; padding-bottom:0.6em;"> <table style="margin:0 auto;text-align:left;"><tbody><tr style="vertical-align:top"><td style="padding-right:1.0em;;"> <a href="/wiki/Extremely_low_frequency" title="Extremely low frequency">1 (ELF)</a></td><td style="padding-right:1.0em;;"> <a href="/wiki/Super_low_frequency" title="Super low frequency">2 (SLF)</a></td><td style="padding-right:1.0em;;"> <a href="/wiki/Ultra_low_frequency" title="Ultra low frequency">3 (ULF)</a></td><td style="padding-right:1.0em;;padding-right:0;"> <a href="/wiki/Very_low_frequency" title="Very low frequency">4 (VLF)</a></td></tr><tr style="vertical-align:top"><td style="padding-right:1.0em;;"> <a href="/wiki/Low_frequency" title="Low frequency">5 (LF)</a></td><td style="padding-right:1.0em;;"> <a href="/wiki/Medium_frequency" title="Medium frequency">6 (MF)</a></td><td style="padding-right:1.0em;;"> <a href="/wiki/High_frequency" title="High frequency">7 (HF)</a></td><td style="padding-right:1.0em;;padding-right:0;"> <a class="mw-selflink selflink">8 (VHF)</a></td></tr><tr style="vertical-align:top"><td style="padding-right:1.0em;;"> <a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">9 (UHF)</a></td><td style="padding-right:1.0em;;"> <a href="/wiki/Super_high_frequency" title="Super high frequency">10 (SHF)</a></td><td style="padding-right:1.0em;;"> <a href="/wiki/Extremely_high_frequency" title="Extremely high frequency">11 (EHF)</a></td><td style="padding-right:1.0em;;padding-right:0;"> <a href="/wiki/Terahertz_radiation" title="Terahertz radiation">12 (THF)</a></td></tr></tbody></table></td> </tr><tr><th class="sidebar-heading" style="background:#ddddff;"> <a href="/wiki/NATO_radio_bands" class="mw-redirect" title="NATO radio bands">EU / NATO / US ECM </a></th></tr><tr><td class="sidebar-content" style="padding-top:0.2em; padding-bottom:0.6em;"> <div class="hlist"> <ul><li><a href="/wiki/A_band_(NATO)" title="A band (NATO)">A</a></li> <li><a href="/wiki/B_band_(NATO)" title="B band (NATO)">B</a></li> <li><a href="/wiki/C_band_(NATO)" title="C band (NATO)">C</a></li> <li><a href="/wiki/D_band_(NATO)" title="D band (NATO)">D</a></li> <li><a href="/wiki/E_band_(NATO)" title="E band (NATO)">E</a></li> <li><a href="/wiki/F_band_(NATO)" title="F band (NATO)">F</a></li> <li><a href="/wiki/G_band_(NATO)" title="G band (NATO)">G</a></li> <li><a href="/wiki/H_band_(NATO)" title="H band (NATO)">H</a></li> <li><a href="/wiki/I_band_(NATO)" title="I band (NATO)">I</a></li> <li><a href="/wiki/J_band_(NATO)" title="J band (NATO)">J</a></li> <li><a href="/wiki/K_band_(NATO)" title="K band (NATO)">K</a></li> <li><a href="/wiki/L_band_(NATO)" title="L band (NATO)">L</a></li> <li><a href="/wiki/M_band_(NATO)" title="M band (NATO)">M</a></li> <li><a href="/wiki/N_band_(NATO)" title="N band (NATO)">N</a></li></ul> </div></td> </tr><tr><th class="sidebar-heading" style="background:#ddddff;"> <a href="/wiki/Radio_spectrum#IEEE" title="Radio spectrum">IEEE </a></th></tr><tr><td class="sidebar-content" style="padding-top:0.2em; padding-bottom:0.6em;"> <div class="hlist"> <ul><li><a href="/wiki/High_frequency" title="High frequency">HF</a></li> <li><a class="mw-selflink selflink">VHF</a></li> <li><a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a></li> <li><a href="/wiki/L_band" title="L band">L</a></li> <li><a href="/wiki/S_band" title="S band">S</a></li> <li><a href="/wiki/C_band_(IEEE)" title="C band (IEEE)">C</a></li> <li><a href="/wiki/X_band" title="X band">X</a></li> <li><a href="/wiki/Ku_band" title="Ku band">K<sub>u</sub></a></li> <li><a href="/wiki/K_band_(IEEE)" title="K band (IEEE)">K</a></li> <li><a href="/wiki/Ka_band" title="Ka band">K<sub>a</sub></a></li> <li><a href="/wiki/V_band" title="V band">V</a></li> <li><a href="/wiki/W_band" title="W band">W</a></li> <li><a href="/wiki/Extremely_high_frequency" title="Extremely high frequency">mm</a></li></ul> </div></td> </tr><tr><th class="sidebar-heading" style="background:#ddddff;"> Other TV and radio</th></tr><tr><td class="sidebar-content" style="padding-top:0.2em; padding-bottom:0.6em;"> <div class="hlist"> <ul><li><a href="/wiki/Band_I" title="Band I">I</a></li> <li><a href="/wiki/Band_II" title="Band II">II</a></li> <li><a href="/wiki/Band_III" title="Band III">III</a></li> <li><a href="/wiki/Band_IV" title="Band IV">IV</a></li> <li><a href="/wiki/Band_V" title="Band V">V</a></li> <li><a href="/wiki/Band_VI" title="Band VI">VI</a></li></ul> </div></td> </tr><tr><td class="sidebar-navbar"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Radio_bands_sidebar" title="Template:Radio bands sidebar"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Radio_bands_sidebar" title="Template talk:Radio bands sidebar"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Radio_bands_sidebar" title="Special:EditPage/Template:Radio bands sidebar"><abbr title="Edit this template">e</abbr></a></li></ul></div></td></tr></tbody></table> <p><b>Very high frequency</b> (<b>VHF</b>) is the <a href="/wiki/International_Telecommunication_Union" title="International Telecommunication Union">ITU</a> designation<sup id="cite_ref-ITU_Nomenclature_1-0" class="reference"><a href="#cite_note-ITU_Nomenclature-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> for the range of <a href="/wiki/Radio_frequency" title="Radio frequency">radio frequency</a> <a href="/wiki/Electromagnetic_wave" class="mw-redirect" title="Electromagnetic wave">electromagnetic waves</a> (<a href="/wiki/Radio_wave" title="Radio wave">radio waves</a>) from 30 to 300 <a href="/wiki/Megahertz" class="mw-redirect" title="Megahertz">megahertz</a> (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted <a href="/wiki/High_frequency" title="High frequency">high frequency</a> (HF), and the next higher frequencies are known as <a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">ultra high frequency</a> (UHF). </p><p>VHF radio waves propagate mainly by <a href="/wiki/Line-of-sight_propagation" title="Line-of-sight propagation">line-of-sight</a>, so they are blocked by hills and mountains, although due to refraction they can travel somewhat beyond the <a href="/wiki/Horizon" title="Horizon">visual horizon</a> out to about 160 km (100 miles). Common uses for radio waves in the VHF band are <a href="/wiki/Digital_Audio_Broadcasting" title="Digital Audio Broadcasting">Digital Audio Broadcasting</a> (DAB) and <a href="/wiki/FM_radio" class="mw-redirect" title="FM radio">FM radio</a> broadcasting, <a href="/wiki/Terrestrial_television" title="Terrestrial television">television broadcasting</a>, <a href="/wiki/Two-way_radio" title="Two-way radio">two-way</a> <a href="/wiki/Land_mobile_radio_system" title="Land mobile radio system">land mobile radio systems</a> (emergency, business, private use and military), long range data communication up to several tens of kilometers with <a href="/wiki/Radio_modem" title="Radio modem">radio modems</a>, <a href="/wiki/Amateur_radio" title="Amateur radio">amateur radio</a>, and <a href="/wiki/Marine_VHF_radio" title="Marine VHF radio">marine communications</a>. <a href="/wiki/Air_traffic_control" title="Air traffic control">Air traffic control</a> communications and air navigation systems (e.g. <a href="/wiki/VHF_omnidirectional_range" title="VHF omnidirectional range">VOR</a> and <a href="/wiki/Instrument_landing_system" title="Instrument landing system">ILS</a>) work at distances of 100 kilometres (62 miles) or more to aircraft at cruising altitude. </p><p>In the Americas and many other parts of the world, VHF <a href="/wiki/Band_I" title="Band I">Band I</a> was used for the transmission of <a href="/wiki/Analog_television" title="Analog television">analog television</a>. As part of the worldwide <a href="/wiki/Digital_television_transition" title="Digital television transition">transition to digital terrestrial television</a> most countries require broadcasters to air television in the VHF range using digital, rather than analog encoding. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Propagation_characteristics">Propagation characteristics</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=1" title="Edit section: Propagation characteristics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Radio waves in the VHF band propagate mainly by <a href="/wiki/Line-of-sight_propagation" title="Line-of-sight propagation">line-of-sight</a> and ground-bounce paths; unlike in the <a href="/wiki/High_frequency" title="High frequency">HF</a> band there is only some reflection at lower frequencies from the <a href="/wiki/Ionosphere" title="Ionosphere">ionosphere</a> (<a href="/wiki/Skywave" title="Skywave">skywave</a> propagation).<sup id="cite_ref-Seybold_2-0" class="reference"><a href="#cite_note-Seybold-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> They do not follow the contour of the Earth as <a href="/wiki/Ground_wave" title="Ground wave">ground waves</a> and so are blocked by hills and mountains, although because they are weakly refracted (bent) by the atmosphere they can travel somewhat beyond the <a href="/wiki/Horizon" title="Horizon">visual horizon</a> out to about 160 km (100 miles). They can penetrate building walls and be received indoors, although in urban areas reflections from buildings cause <a href="/wiki/Multipath_propagation" title="Multipath propagation">multipath propagation</a>, which can interfere with television reception. Atmospheric <a href="/wiki/Radio_noise" title="Radio noise">radio noise</a> and interference (<a href="/wiki/Radio_frequency_interference" class="mw-redirect" title="Radio frequency interference">RFI</a>) from electrical equipment is less of a problem in this and higher frequency bands than at lower frequencies. The VHF band is the first band at which efficient transmitting antennas are small enough that they can be mounted on vehicles and portable devices, so the band is used for <a href="/wiki/Two_way_radio" class="mw-redirect" title="Two way radio">two-way</a> <a href="/wiki/Land_mobile_radio_system" title="Land mobile radio system">land mobile radio systems</a>, such as <a href="/wiki/Walkie-talkie" title="Walkie-talkie">walkie-talkies</a>, and <a href="/wiki/Two_way_radio" class="mw-redirect" title="Two way radio">two way radio</a> communication with aircraft (<a href="/wiki/Airband" title="Airband">Airband</a>) and ships (<a href="/wiki/Marine_radio" class="mw-redirect" title="Marine radio">marine radio</a>). Occasionally, when conditions are right, VHF waves can travel long distances by <a href="/wiki/Tropospheric_ducting" class="mw-redirect" title="Tropospheric ducting">tropospheric ducting</a> due to refraction by temperature gradients in the atmosphere. </p> <div class="mw-heading mw-heading2"><h2 id="Line-of-sight_calculation">Line-of-sight calculation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=2" title="Edit section: Line-of-sight calculation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Rabbit-ears_dipole_antenna_with_UHF_loop_20090204.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/22/Rabbit-ears_dipole_antenna_with_UHF_loop_20090204.jpg/220px-Rabbit-ears_dipole_antenna_with_UHF_loop_20090204.jpg" decoding="async" width="220" height="301" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/22/Rabbit-ears_dipole_antenna_with_UHF_loop_20090204.jpg/330px-Rabbit-ears_dipole_antenna_with_UHF_loop_20090204.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/22/Rabbit-ears_dipole_antenna_with_UHF_loop_20090204.jpg/440px-Rabbit-ears_dipole_antenna_with_UHF_loop_20090204.jpg 2x" data-file-width="1672" data-file-height="2291" /></a><figcaption>"Rabbit-ears" VHF <a href="/wiki/Television_antenna" title="Television antenna">television antenna</a> (the small loop is a separate UHF antenna)</figcaption></figure> <p>VHF transmission range is a function of transmitter power, receiver sensitivity, and distance to the horizon, since VHF signals propagate under normal conditions as a near <a href="/wiki/Line-of-sight_propagation" title="Line-of-sight propagation">line-of-sight</a> phenomenon. The distance to the <a href="/wiki/Radio_horizon" class="mw-redirect" title="Radio horizon">radio horizon</a> is slightly extended over the geometric line of sight to the horizon, as radio waves are weakly bent back toward the Earth by the atmosphere. </p><p>An approximation to calculate the line-of-sight horizon distance (on Earth) is: </p> <ul><li>distance in nautical miles = <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 1.23\times {\sqrt {A_{\textrm {ft}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mn>1.23</mn> <mo>×</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <msub> <mi>A</mi> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mtext>ft</mtext> </mrow> </mrow> </msub> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 1.23\times {\sqrt {A_{\textrm {ft}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/72b416b709bd392625a2d9e99e6cf228368f4cba" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:12.417ex; height:3.343ex;" alt="{\displaystyle 1.23\times {\sqrt {A_{\textrm {ft}}}}}"></span> where <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle A_{\textrm {ft}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>A</mi> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mtext>ft</mtext> </mrow> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle A_{\textrm {ft}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/4a794cb6b868fbd6d0cce5ae6252d5179bfc5383" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:3.118ex; height:2.509ex;" alt="{\displaystyle A_{\textrm {ft}}}"></span> is the height of the antenna in feet<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li> <li>distance in kilometers = <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\sqrt {12.746\times A_{\textrm {m}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mn>12.746</mn> <mo>×</mo> <msub> <mi>A</mi> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mtext>m</mtext> </mrow> </mrow> </msub> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\sqrt {12.746\times A_{\textrm {m}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/9f34916426552758e68b7b2dc01524331651879c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:14.968ex; height:3.343ex;" alt="{\displaystyle {\sqrt {12.746\times A_{\textrm {m}}}}}"></span> where <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle A_{\textrm {m}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>A</mi> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mtext>m</mtext> </mrow> </mrow> </msub> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle A_{\textrm {m}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f69b8e317b73842983899601c02ad8d9fe87f5c6" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:3.344ex; height:2.509ex;" alt="{\displaystyle A_{\textrm {m}}}"></span> is the height of the antenna in meters.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></li></ul> <p>These approximations are only valid for antennas at heights that are small compared to the radius of the Earth. They may not necessarily be accurate in mountainous areas, since the landscape may not be transparent enough for radio waves. </p><p>In engineered communications systems, more complex calculations are required to assess the probable coverage area of a proposed transmitter station.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Antennas">Antennas</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=3" title="Edit section: Antennas"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/UHF_television_broadcasting#UHF_vs_VHF" title="UHF television broadcasting">UHF television broadcasting § UHF vs VHF</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Superturnstile_Tx_Muehlacker.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Superturnstile_Tx_Muehlacker.JPG/220px-Superturnstile_Tx_Muehlacker.JPG" decoding="async" width="220" height="351" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Superturnstile_Tx_Muehlacker.JPG/330px-Superturnstile_Tx_Muehlacker.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Superturnstile_Tx_Muehlacker.JPG/440px-Superturnstile_Tx_Muehlacker.JPG 2x" data-file-width="641" data-file-height="1023" /></a><figcaption>A VHF television broadcasting antenna. This is a common type called a super turnstile or <a href="/wiki/Batwing_antenna" title="Batwing antenna">batwing antenna</a>. </figcaption></figure> <p>VHF is the first band at which wavelengths are small enough that efficient transmitting antennas are short enough to mount on vehicles and handheld devices, a <a href="/wiki/Whip_antenna" title="Whip antenna">quarter wave whip antenna</a> at VHF frequencies is 25 cm to 2.5 meter (10 inches to 8 feet) long. So the VHF and UHF wavelengths are used for <a href="/wiki/Two-way_radio" title="Two-way radio">two-way radios</a> in vehicles, aircraft, and handheld <a href="/wiki/Transceiver" title="Transceiver">transceivers</a> and <a href="/wiki/Walkie-talkie" title="Walkie-talkie">walkie-talkies</a>. Portable radios usually use <a href="/wiki/Whip_antenna" title="Whip antenna">whips</a> or <a href="/wiki/Rubber_ducky_antenna" title="Rubber ducky antenna">rubber ducky antennas</a>, while base stations usually use larger fiberglass whips or <a href="/wiki/Collinear_antenna_array" title="Collinear antenna array">collinear arrays</a> of vertical dipoles. </p><p>For directional antennas, the <a href="/wiki/Yagi-Uda_antenna" class="mw-redirect" title="Yagi-Uda antenna">Yagi antenna</a> is the most widely used as a <a href="/wiki/High_gain_antenna" class="mw-redirect" title="High gain antenna">high gain</a> or "beam" antenna. For television reception, the Yagi is used, as well as the <a href="/wiki/Log-periodic_antenna" title="Log-periodic antenna">log-periodic antenna</a> due to its wider bandwidth. <a href="/wiki/Helical_antenna" title="Helical antenna">Helical</a> and <a href="/wiki/Turnstile_antenna" title="Turnstile antenna">turnstile antennas</a> are used for <a href="/wiki/Satellite_communication" class="mw-redirect" title="Satellite communication">satellite communication</a> since they employ <a href="/wiki/Circular_polarization" title="Circular polarization">circular polarization</a>. For even higher gain, multiple Yagis or helicals can be mounted together to make <a href="/wiki/Array_antennas" class="mw-redirect" title="Array antennas">array antennas</a>. Vertical <a href="/wiki/Collinear_antenna_array" title="Collinear antenna array">collinear arrays</a> of dipoles can be used to make high gain <a href="/wiki/Omnidirectional_antenna" title="Omnidirectional antenna">omnidirectional antennas</a>, in which more of the antenna's power is radiated in horizontal directions. Television and FM broadcasting stations use collinear arrays of specialized dipole antennas such as <a href="/wiki/Batwing_antenna" title="Batwing antenna">batwing antennas</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Universal_use">Universal use</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=4" title="Edit section: Universal use"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Certain subparts of the VHF band have the same use around the world. Some national uses are detailed below. </p> <ul><li>50–54 MHz: <a href="/wiki/Amateur_radio" title="Amateur radio">amateur radio</a> <a href="/wiki/6-meter_band" title="6-meter band">6-meter band</a>.</li> <li>108–118 MHz: Air navigation beacons <a href="/wiki/VHF_omnidirectional_range" title="VHF omnidirectional range">VOR</a> and <a href="/wiki/Instrument_Landing_System" class="mw-redirect" title="Instrument Landing System">Instrument Landing System</a> localizer.</li> <li>118–137 MHz: <a href="/wiki/Airband" title="Airband">Airband</a> for <a href="/wiki/Air_traffic_control" title="Air traffic control">air traffic control</a>, <a href="/wiki/Amplitude_modulation" title="Amplitude modulation">AM</a>, 121.5 MHz is emergency frequency</li> <li>144–146 MHz: <a href="/wiki/Amateur_radio" title="Amateur radio">amateur radio</a> <a href="/wiki/2-meter_band" title="2-meter band">2-meter band</a> (Extends up to 148 MHz in some Regions).</li> <li>156–174 MHz: VHF maritime mobile band for <a href="/wiki/VHF_maritime_radio" class="mw-redirect" title="VHF maritime radio">maritime two-way radio</a> on ships.</li></ul> <div class="mw-heading mw-heading2"><h2 id="By_country">By country</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=5" title="Edit section: By country"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-center" typeof="mw:File/Thumb"><a href="/wiki/File:VHF_Usage.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/VHF_Usage.svg/700px-VHF_Usage.svg.png" decoding="async" width="700" height="248" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cc/VHF_Usage.svg/1050px-VHF_Usage.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cc/VHF_Usage.svg/1400px-VHF_Usage.svg.png 2x" data-file-width="2400" data-file-height="850" /></a><figcaption>A plan showing VHF use in <a href="/wiki/Terrestrial_television" title="Terrestrial television">television</a>, <a href="/wiki/FM_radio" class="mw-redirect" title="FM radio">FM radio</a>, <a href="/wiki/Amateur_radio" title="Amateur radio">amateur radio</a>, <a href="/wiki/Marine_radio" class="mw-redirect" title="Marine radio">marine radio</a> and <a href="/wiki/Airband" title="Airband">aviation</a>.</figcaption></figure> <div class="mw-heading mw-heading3"><h3 id="Australia">Australia</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=6" title="Edit section: Australia"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Australasian_television_frequencies" class="mw-redirect" title="Australasian television frequencies">Australasian television frequencies</a></div> <p>The VHF TV band in Australia was originally allocated channels 1 to 10-with channels 2, 7 and 9 assigned for the initial services in <a href="/wiki/Sydney" title="Sydney">Sydney</a> and <a href="/wiki/Melbourne" title="Melbourne">Melbourne</a>, and later the same channels were assigned in <a href="/wiki/Brisbane" title="Brisbane">Brisbane</a>, <a href="/wiki/Adelaide" title="Adelaide">Adelaide</a> and <a href="/wiki/Perth" title="Perth">Perth</a>. Other capital cities and regional areas used a combination of these and other frequencies as available. The initial commercial services in <a href="/wiki/Hobart" title="Hobart">Hobart</a> and <a href="/wiki/Darwin,_Northern_Territory" title="Darwin, Northern Territory">Darwin</a> were respectively allocated channels 6 and 8 rather than 7 or 9. </p><p>By the early 1960s it became apparent that the 10 VHF channels were insufficient to support the growth of television services. This was rectified by the addition of three additional frequencies-channels 0, 5A and 11. Older television sets using rotary dial tuners required adjustment to receive these new channels. Most TVs of that era were not equipped to receive these broadcasts, and so were modified at the owners' expense to be able to tune into these bands; otherwise the owner had to buy a new TV. </p><p>Several TV stations were allocated to VHF channels 3, 4 and 5, which were within the FM radio bands although not yet used for that purpose. A couple of notable examples were <a href="/wiki/NBN_Television" class="mw-redirect" title="NBN Television">NBN-3</a> <a href="/wiki/Newcastle,_New_South_Wales" title="Newcastle, New South Wales">Newcastle</a>, <a href="/wiki/WIN_(TV_station)" title="WIN (TV station)">WIN-4</a> <a href="/wiki/Wollongong" title="Wollongong">Wollongong</a> and <a href="/wiki/Australian_Broadcasting_Corporation" title="Australian Broadcasting Corporation">ABC</a> <a href="/wiki/Newcastle,_New_South_Wales" title="Newcastle, New South Wales">Newcastle</a> on channel 5. While some Channel 5 stations were moved to 5A in the 1970s and 80s, beginning in the 1990s, the <a href="/wiki/Australian_Broadcasting_Authority" title="Australian Broadcasting Authority">Australian Broadcasting Authority</a> began a process to move these stations to <a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a> bands to free up valuable VHF spectrum for its original purpose of FM radio. In addition, by 1985 the federal government decided new TV stations are to be broadcast on the UHF band. </p><p>Two new VHF channels, 9A and 12, have since been made available and are being used primarily for digital services (e.g. <a href="/wiki/Australian_Broadcasting_Corporation" title="Australian Broadcasting Corporation">ABC</a> in capital cities) but also for some new analogue services in regional areas. Because channel 9A is not used for television services in or near Sydney, Melbourne, Brisbane, Adelaide or Perth, <a href="/wiki/Digital_radio_in_Australia" title="Digital radio in Australia">digital radio</a> in those cities are broadcast on DAB frequencies blocks 9A, 9B and 9C. </p><p>VHF radio is also used for marine Radio<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> as per its long-distance reachability comparing UHF frequencies. </p><p>Example allocation of VHF–UHF frequencies:<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <ul><li>Radionavigation 60: 84–86 MHz</li> <li>Fixed Maritime Mobile: 130–135.7 MHz</li> <li>Fixed Aeronautical radio navigation: 160–190 MHz</li> <li>Broadcasting Aeronautical Radionavigation: 255–283.5 MHz</li> <li>Aeronautical Radionavigation AUS 49 / Maritime Radionavigation (radiobeacons) 73: 315–325 MHz</li></ul> <div class="mw-heading mw-heading3"><h3 id="New_Zealand">New Zealand</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=7" title="Edit section: New Zealand"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>44–51, 54–68 MHz: <a href="/wiki/Band_I" title="Band I">Band I</a> Television (channels 1–3)</li> <li>87.5–108 MHz: <a href="/wiki/Band_II" title="Band II">Band II</a> Radio</li> <li>118–137 MHz: <a href="/wiki/Airband" title="Airband">Airband</a> for <a href="/wiki/Air_traffic_control" title="Air traffic control">air traffic control</a>, <a href="/wiki/Amplitude_modulation" title="Amplitude modulation">AM</a> <ul><li>108–117.975 MHz: Air navigation beacons <a href="/wiki/VHF_omnidirectional_range" title="VHF omnidirectional range">VOR</a> and <a href="/wiki/Instrument_landing_system" title="Instrument landing system">ILS</a></li> <li>121.5 MHz is an emergency frequency</li></ul></li> <li>144–148 MHz: <a href="/wiki/Amateur_radio" title="Amateur radio">Amateur radio</a> <a href="/wiki/2-meter_band" title="2-meter band">2-meter band</a></li> <li>156–162.2 MHz: <a href="/wiki/Marine_VHF_radio" title="Marine VHF radio">Marine radio</a></li> <li>174–230 MHz: <a href="/wiki/Band_III" title="Band III">Band III</a> Television (channels 4–11)</li></ul> <p>Until 2013, the four main free-to-air TV stations in <a href="/wiki/New_Zealand" title="New Zealand">New Zealand</a> used the VHF television bands (<a href="/wiki/Band_I" title="Band I">Band I</a> and <a href="/wiki/Band_III" title="Band III">Band III</a>) to transmit to New Zealand households. Other stations, including a variety of pay and regional free-to-air stations, were forced to broadcast in the <a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a> band, since the VHF band had been very overloaded with four stations sharing a very small frequency band, which was so overcrowded that one or more channels would not be available in some smaller towns. </p><p>However, <a href="/wiki/Digital_changeover_dates_in_New_Zealand" title="Digital changeover dates in New Zealand">at the end of 2013</a>, all television channels stopped broadcasting on the VHF bands, as New Zealand moved to digital television broadcasting, requiring all stations to either broadcast on UHF or satellite (where UHF was unavailable) utilising the <a href="/wiki/Freeview_(New_Zealand)" title="Freeview (New Zealand)">Freeview</a> service.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Refer to <a href="/wiki/Australasian_television_frequencies" class="mw-redirect" title="Australasian television frequencies">Australasian television frequencies</a> for more information. </p> <div class="mw-heading mw-heading3"><h3 id="United_Kingdom">United Kingdom</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=8" title="Edit section: United Kingdom"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-Unreferenced_section plainlinks metadata ambox ambox-content ambox-Unreferenced" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This section <b>does not <a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources">cite</a> any <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">sources</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Very_high_frequency" title="Special:EditPage/Very high frequency">improve this section</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and <a href="/wiki/Wikipedia:Verifiability#Burden_of_evidence" title="Wikipedia:Verifiability">removed</a>.</span> <span class="date-container"><i>(<span class="date">August 2016</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p>British television originally used VHF <a href="/wiki/Band_I" title="Band I">band I</a> and <a href="/wiki/Band_III" title="Band III">band III</a>. Television on VHF was in black and white with <a href="/wiki/405-line" class="mw-redirect" title="405-line">405-line</a> format (although there were experiments with all three colour systems-<a href="/wiki/NTSC" title="NTSC">NTSC</a>, <a href="/wiki/PAL" title="PAL">PAL</a>, and <a href="/wiki/SECAM" title="SECAM">SECAM</a>-adapted for the 405-line system in the late 1950s and early 1960s). </p><p>British colour television was broadcast on <a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a> (channels 21–69), beginning in the late 1960s. From then on, TV was broadcast on both VHF and UHF (VHF being a monochromatic downconversion from the 625-line colour signal), with the exception of <a href="/wiki/BBC_Two" title="BBC Two">BBC2</a> (which had always broadcast solely on UHF). The last British VHF TV transmitters closed down on January 3, 1985. VHF <a href="/wiki/Band_III" title="Band III">band III</a> is now used in the UK for <a href="/wiki/Digital_audio_broadcasting" class="mw-redirect" title="Digital audio broadcasting">digital audio broadcasting</a>, and VHF <a href="/wiki/Band_II" title="Band II">band II</a> is used for <a href="/wiki/FM_radio" class="mw-redirect" title="FM radio">FM radio</a>, as it is in most of the world. </p><p>Unusually, the UK has an <a href="/wiki/Amateur_radio" title="Amateur radio">amateur radio</a> allocation at <a href="/wiki/4_metres" class="mw-redirect" title="4 metres">4 metres</a>, 70–70.5 MHz. </p> <div class="mw-heading mw-heading3"><h3 id="United_States_and_Canada">United States and Canada</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=9" title="Edit section: United States and Canada"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Frequency assignments between US and Canadian users are closely coordinated since much of the Canadian population is within VHF radio range of the US border. Certain discrete frequencies are reserved for <a href="/wiki/Radio_astronomy" title="Radio astronomy">radio astronomy</a>. The general services in the VHF band are: </p> <ul><li>30–49.6 MHz: Licensed 2-way land mobile communication, with various sub-bands.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup></li> <li>30–88 MHz: Military VHF <a href="/wiki/Frequency_modulation" title="Frequency modulation">FM</a>, including <a href="/wiki/SINCGARS" title="SINCGARS">SINCGARS</a></li> <li>43–50 MHz: <a href="/wiki/Cordless_telephone" title="Cordless telephone">Cordless telephones</a>, 49 MHz FM walkie-talkies and radio controlled toys, and mixed 2-way mobile communication. The FM broadcast band originally operated here (42–50 MHz) before it was moved to 88–108 MHz.</li> <li>50–54 MHz: <a href="/wiki/Amateur_radio" title="Amateur radio">Amateur radio</a> <a href="/wiki/6-meter_band" title="6-meter band">6-meter band</a> <ul><li>50.8–51 MHz: <a href="/wiki/Radio-controlled_aircraft" title="Radio-controlled aircraft">Radio-controlled aircraft</a> (on ten fixed frequencies at 20 kHz spacing) with an <a href="/wiki/Amateur_radio_licensing_in_the_United_States" title="Amateur radio licensing in the United States">FCC amateur radio Service license</a>, flown under FCC Part 97, rule 97.215.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></li></ul></li> <li>54–88 MHz, known as "<a href="/wiki/Band_I" title="Band I">Band I</a>" internationally; some DTV stations will appear here. See <a href="/wiki/Pan-American_television_frequencies" title="Pan-American television frequencies">Pan-American television frequencies</a>. <ul><li>54–72 MHz <a href="/wiki/Television" title="Television">TV</a> channels 2–4 (VHF-Lo)</li> <li>72–76 MHz: Radio controlled models, industrial remote control, and other devices. <a href="/wiki/Radio-controlled_aircraft" title="Radio-controlled aircraft">Model aircraft</a> operate on 72 MHz while surface models operate on 75 MHz in the US and Canada, air navigation beacons 74.8–75.2 MHz.</li> <li>76–88 MHz TV channels 5–6 (VHF-Lo)</li></ul></li> <li>87.5–108 MHz: <a href="/wiki/FM_radio" class="mw-redirect" title="FM radio">FM radio</a> broadcasting (87.9–91.9 non-commercial, 92–108 commercial in the United States) (known as "<a href="/wiki/Band_II" title="Band II">Band II</a>" internationally)</li> <li>108–118 MHz: Air navigation beacons <a href="/wiki/VHF_omnidirectional_range" title="VHF omnidirectional range">VOR</a></li> <li>118–137 MHz: <a href="/wiki/Airband" title="Airband">Airband</a> for <a href="/wiki/Air_traffic_control" title="Air traffic control">air traffic control</a>, <a href="/wiki/Amplitude_modulation" title="Amplitude modulation">AM</a> <ul><li>121.5 MHz is an emergency frequency</li></ul></li> <li>137–138 MHz Space research, space operations, meteorological satellite<sup id="cite_ref-CanadianTable_11-0" class="reference"><a href="#cite_note-CanadianTable-11"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup></li> <li>138–144 MHz: Land mobile, auxiliary civil services, satellite, space research, and other miscellaneous services</li> <li>144–148 MHz: <a href="/wiki/Amateur_radio" title="Amateur radio">Amateur radio</a> <a href="/wiki/2-meter_band" title="2-meter band">2-meter band</a></li> <li>148–150 MHz: Land mobile, fixed, satellite</li> <li>150–156 MHz: "VHF <a href="/wiki/Business_band" title="Business band">business band</a>", public safety, the unlicensed <a href="/wiki/Multi-Use_Radio_Service" title="Multi-Use Radio Service">Multi-Use Radio Service</a> (MURS), and other 2-way land mobile, FM</li> <li>156–158 MHz <a href="/wiki/Marine_VHF_radio" title="Marine VHF radio">VHF Marine Radio</a> <ul><li>156.8 MHz (Channel 16) is the maritime emergency and contact frequency.</li></ul></li> <li>159.81-161.565 MHz railways<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>b<span class="cite-bracket">]</span></a></sup> <ul><li>159.81–160.2 are railroads in Canada only and are used by trucking companies in the U.S.</li></ul></li> <li>160.6–162 Wireless microphones and TV/FM broadcast remote pickup</li> <li>162.4–162.55: <a href="/wiki/Weather_radio" title="Weather radio">NOAA Weather Stations</a>, narrowband FM, Weatheradio Canada Stations</li> <li>174–240 MHz, known as "<a href="/wiki/Band_III" title="Band III">Band III</a>" internationally. A number of DTV channels have begun broadcasting here, especially many of the stations which were assigned to these channels for previous analog operation. <ul><li>174–216 MHz television channels 7–13 (VHF-Hi)</li> <li>174–216 MHz: professional wireless microphones (low power, certain exact frequencies only)</li> <li>216–222 MHz: land mobile, fixed, maritime mobile,<sup id="cite_ref-CanadianTable_11-1" class="reference"><a href="#cite_note-CanadianTable-11"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup></li> <li>222–225 MHz: <a href="/wiki/1.25-meter_band" title="1.25-meter band">1.25 meters</a> (US) (Canada 219–220, 222–225 MHz) <a href="/wiki/Amateur_radio" title="Amateur radio">amateur radio</a></li></ul></li> <li>225 MHz and above (UHF): Military aircraft radio, 243 MHz is an emergency frequency (225–400 MHz) AM, including <a href="/wiki/HAVE_QUICK" class="mw-redirect" title="HAVE QUICK">HAVE QUICK</a>, dGPS RTCM-104</li></ul> <p><a href="/wiki/Cable_television" title="Cable television">Cable television</a>, though not transmitted aerially, uses a spectrum of frequencies overlapping VHF.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="VHF_television">VHF television</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=10" title="Edit section: VHF television"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The U.S. <a href="/wiki/Federal_Communications_Commission" title="Federal Communications Commission">FCC</a> allocated television broadcasting to a channelized roster as early as 1938 with 19 channels. That changed three more times: in 1940 when Channel 19 was deleted and several channels changed frequencies, then in 1946 with television going from 18 channels to 13 channels, again with different frequencies, and finally in 1948 with the removal of <a href="/wiki/Channel_1_(North_American_TV)" title="Channel 1 (North American TV)">Channel 1</a> (analog channels 2–13 remain as they were, even on <a href="/wiki/Cable_television" title="Cable television">cable television</a>).<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Channels 14–19 later appeared on the UHF band, while channel 1 remains unused. </p> <div class="mw-heading mw-heading4"><h4 id="87.5–87.9_MHz"><span id="87.5.E2.80.9387.9_MHz"></span>87.5–87.9 MHz</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=11" title="Edit section: 87.5–87.9 MHz"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>87.5–87.9 MHz is a radio band which, in most of the world, is used for <a href="/wiki/FM_broadcasting" title="FM broadcasting">FM broadcasting</a>. In <a href="/wiki/North_America" title="North America">North America</a>, however, this bandwidth is allocated to VHF television channel 6 (82–88 MHz). The analog audio for TV channel 6 is broadcast at 87.75 MHz (adjustable down to 87.74). Several stations, known as <a href="/wiki/Channel_6_radio_stations_in_the_United_States" title="Channel 6 radio stations in the United States">Frankenstations</a>, most notably those joining the <a href="/wiki/Pulse_87" title="Pulse 87">Pulse 87</a> franchise, have operated on this frequency as radio stations, though they use television licenses. As a result, FM radio receivers such as those found in automobiles which are designed to tune into this frequency range could receive the audio for analog-mode programming on the local TV channel 6 while in North America. The practice largely ended with the <a href="/wiki/Digital_television_transition_in_the_United_States" title="Digital television transition in the United States">DTV transition</a> in 2009, although some still exist. </p><p>The FM broadcast channel at 87.9 MHz is normally off-limits for FM audio broadcasting; it is reserved for displaced class D stations which have no other frequencies in the normal 88.1–107.9 MHz subband to move to. So far, only two stations have qualified to operate on 87.9 MHz: 10–watt <a href="/wiki/KSFH" title="KSFH">KSFH</a> in <a href="/wiki/Mountain_View,_California" title="Mountain View, California">Mountain View, California</a> and 34–watt translator <a href="/wiki/K200AA" class="mw-redirect" title="K200AA">K200AA</a> in <a href="/wiki/Sun_Valley,_Nevada" title="Sun Valley, Nevada">Sun Valley, Nevada</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Unlicensed_operation">Unlicensed operation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=12" title="Edit section: Unlicensed operation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In some countries, particularly the United States and Canada, limited low-power license-free operation is available in the FM broadcast band for purposes such as <a href="/wiki/Micro-broadcasting" class="mw-redirect" title="Micro-broadcasting">micro-broadcasting</a> and sending output from <a href="/wiki/Compact_disc" title="Compact disc">CD</a> or digital media players to radios without auxiliary-in jacks, though this is illegal in some other countries. This practice was legalised in the United Kingdom on 8 December 2006.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=13" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/TV_radio" title="TV radio">TV radio</a></li> <li><a href="/wiki/List_of_oldest_radio_stations" title="List of oldest radio stations">List of oldest radio stations</a></li> <li><a href="/wiki/Apex_(radio_band)" title="Apex (radio band)">Apex (radio band)</a></li> <li><a href="/wiki/FM_broadcast_band" title="FM broadcast band">FM broadcast band</a></li> <li><a href="/wiki/Moving_image_formats" title="Moving image formats">Moving image formats</a></li> <li><a href="/wiki/Polar_mesosphere_summer_echoes" class="mw-redirect" title="Polar mesosphere summer echoes">Polar mesosphere summer echoes</a></li> <li><a href="/wiki/Television_channel_frequencies" title="Television channel frequencies">Television channel frequencies</a></li> <li><a href="/wiki/Knife-edge_effect" class="mw-redirect" title="Knife-edge effect">Knife-edge effect</a></li> <li><a href="/wiki/VHF_omnidirectional_range" title="VHF omnidirectional range">VHF omnidirectional range</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=14" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text">The 42 MHz Segment is still in current use by the <a href="/wiki/California_Highway_Patrol" title="California Highway Patrol">California Highway Patrol</a>, <a href="/wiki/New_Jersey_State_Police" title="New Jersey State Police">New Jersey State Police</a>, Tennessee Highway Patrol, and other state law enforcement agencies.</span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text">The 160 and 161 areas are Association of American Railroads (AAR) 91–channel <a href="/wiki/Railroad" class="mw-redirect" title="Railroad">railroad</a> radios, issued to the railroad. For example, AAR 21 is 160.425 MHz and that is issued to <a href="/wiki/Tennessee_Valley_Railroad_Museum" title="Tennessee Valley Railroad Museum">Tennessee Valley Railroad Museum</a>, as well as other railroads that want AAR Channel 21.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Very_high_frequency&action=edit&section=15" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-ITU_Nomenclature-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-ITU_Nomenclature_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20131031020427/http://www.itu.int/dms_pubrec/itu-r/rec/v/R-REC-V.431-7-200005-I%21%21PDF-E.pdf">"Rec. ITU-R V.431-7, Nomenclature of the frequency and wavelength bands used in telecommunications"</a> <span class="cs1-format">(PDF)</span>. ITU. Archived from <a rel="nofollow" class="external text" href="http://www.itu.int/dms_pubrec/itu-r/rec/v/R-REC-V.431-7-200005-I!!PDF-E.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 31 October 2013<span class="reference-accessdate">. Retrieved <span class="nowrap">20 February</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Rec.+ITU-R+V.431-7%2C+Nomenclature+of+the+frequency+and+wavelength+bands+used+in+telecommunications&rft.pub=ITU&rft_id=http%3A%2F%2Fwww.itu.int%2Fdms_pubrec%2Fitu-r%2Frec%2Fv%2FR-REC-V.431-7-200005-I%21%21PDF-E.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> <li id="cite_note-Seybold-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-Seybold_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSeybold2005" class="citation book cs1">Seybold, John S. (2005). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=4LtmjGNwOPIC&q=VHF&pg=PA9"><i>Introduction to RF Propagation</i></a>. John Wiley and Sons. pp. 9–10. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0471743682" title="Special:BookSources/978-0471743682"><bdi>978-0471743682</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Introduction+to+RF+Propagation&rft.pages=9-10&rft.pub=John+Wiley+and+Sons&rft.date=2005&rft.isbn=978-0471743682&rft.aulast=Seybold&rft.aufirst=John+S.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D4LtmjGNwOPIC%26q%3DVHF%26pg%3DPA9&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFSenesac" class="citation web cs1">Senesac, David. <a rel="nofollow" class="external text" href="https://www.davidsenesac.com/Information/line_of_sight.html#:~:text=The%20distance%20to%20the%20horizon,by%2012%20equals%201%20mile.">"Visual Line of Sight Calculations dependent on Earth's Curvature"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Visual+Line+of+Sight+Calculations+dependent+on+Earth%27s+Curvature&rft.aulast=Senesac&rft.aufirst=David&rft_id=https%3A%2F%2Fwww.davidsenesac.com%2FInformation%2Fline_of_sight.html%23%3A~%3Atext%3DThe%2520distance%2520to%2520the%2520horizon%2Cby%252012%2520equals%25201%2520mile.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://aty.sdsu.edu/explain/atmos_refr/horizon.html">"Distance to the Horizon"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Distance+to+the+Horizon&rft_id=https%3A%2F%2Faty.sdsu.edu%2Fexplain%2Fatmos_refr%2Fhorizon.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://imdpune.gov.in/training/communication/LN_11_60_Radio%20Wave%20Propagation%20Theory.pdf">"Radio Wave Propagation Theory"</a> <span class="cs1-format">(PDF)</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Radio+Wave+Propagation+Theory&rft_id=https%3A%2F%2Fimdpune.gov.in%2Ftraining%2Fcommunication%2FLN_11_60_Radio%2520Wave%2520Propagation%2520Theory.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.acma.gov.au/theacma/marine-vhf-radio">"Marine VHF radio"</a>. 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Archived from <a rel="nofollow" class="external text" href="https://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&SID=336ab7469b61ecbfa15086dbf1bf2c59&rgn=div5&view=text&node=47:5.0.1.1.6&idno=47#se47.5.97_1215">the original</a> on 2021-01-26<span class="reference-accessdate">. Retrieved <span class="nowrap">2019-03-05</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Electronic+Code+of+Federal+Regulations+%28ECFR%29&rft_id=https%3A%2F%2Fwww.ecfr.gov%2Fcgi-bin%2Ftext-idx%3Fc%3Decfr%26SID%3D336ab7469b61ecbfa15086dbf1bf2c59%26rgn%3Ddiv5%26view%3Dtext%26node%3D47%3A5.0.1.1.6%26idno%3D47%23se47.5.97_1215&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> <li id="cite_note-CanadianTable-11"><span class="mw-cite-backlink">^ <a href="#cite_ref-CanadianTable_11-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-CanadianTable_11-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><i>Canadian Table of Frequency Allocations 9 kHz – 275 GHz</i> (2005 (revised February 2007) ed.). Industry Canada. 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Retrieved <span class="nowrap">27 April</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.jneuhaus.com&rft.atitle=Cable+TV+Channel+Frequencies&rft_id=http%3A%2F%2Fwww.jneuhaus.com%2Ffccindex%2Fcablech.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.tech-notes.tv/History&Trivia/Channel%20One/Channel_1.htm">"What Ever Happened to Channel 1?"</a>. <i>tech-notes.tv</i>. Tech Notes. 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Retrieved <span class="nowrap">27 April</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=tech-notes.tv&rft.atitle=What+Ever+Happened+to+Channel+1%3F&rft.pages=Table-1&rft_id=http%3A%2F%2Fwww.tech-notes.tv%2FHistory%26Trivia%2FChannel%2520One%2FChannel_1.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20110807165012/http://media.ofcom.org.uk/2006/11/23/change-to-the-law-to-allow-the-use-of-low-power-fm-transmitters-for-mp3-players/">"Change to the law to allow the use of low power FM transmitters for MP3 players"</a>. Ofcom. 23 November 2006. Archived from <a rel="nofollow" class="external text" href="http://media.ofcom.org.uk/2006/11/23/change-to-the-law-to-allow-the-use-of-low-power-fm-transmitters-for-mp3-players/">the original</a> on 7 August 2011<span class="reference-accessdate">. Retrieved <span class="nowrap">2 October</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Change+to+the+law+to+allow+the+use+of+low+power+FM+transmitters+for+MP3+players&rft.pub=Ofcom&rft.date=2006-11-23&rft_id=http%3A%2F%2Fmedia.ofcom.org.uk%2F2006%2F11%2F23%2Fchange-to-the-law-to-allow-the-use-of-low-power-fm-transmitters-for-mp3-players%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AVery+high+frequency" class="Z3988"></span></span> </li> </ol></div></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output 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href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Band_IV" title="Band IV">Band IV</a></li> <li><a href="/wiki/Band_V" title="Band V">Band V</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Super_high_frequency" title="Super high frequency">SHF</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Band_VI" title="Band VI">Band VI</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Radio_spectrum_(ITU)" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Radio_spectrum" title="Template:Radio spectrum"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Radio_spectrum" title="Template talk:Radio spectrum"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Radio_spectrum" title="Special:EditPage/Template:Radio spectrum"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Radio_spectrum_(ITU)" style="font-size:114%;margin:0 4em"><a href="/wiki/Radio_spectrum" title="Radio spectrum">Radio spectrum</a> (ITU)</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0;background:transparent;color:inherit;"><div style="padding:0px"><table class="navbox-columns-table" style="border-spacing: 0px; text-align:left;width:auto; margin-left:auto; margin-right:auto;"><tbody><tr style="vertical-align:top"><td class="navbox-list" style="padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Extremely_low_frequency" title="Extremely low frequency">ELF</a></b> <br /> 3 Hz/100 Mm <br /> 30 Hz/10 Mm </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Super_low_frequency" title="Super low frequency">SLF</a></b> <br /> 30 Hz/10 Mm <br /> 300 Hz/1 Mm </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Ultra_low_frequency" title="Ultra low frequency">ULF</a></b> <br /> 300 Hz/1 Mm <br /> 3 kHz/100 km </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Very_low_frequency" title="Very low frequency">VLF</a></b> <br /> 3 kHz/100 km <br /> 30 kHz/10 km </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Low_frequency" title="Low frequency">LF</a></b> <br /> 30 kHz/10 km <br /> 300 kHz/1 km </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Medium_frequency" title="Medium frequency">MF</a></b> <br /> 300 kHz/1 km <br /> 3 MHz/100 m </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/High_frequency" title="High frequency">HF</a></b> <br /> 3 MHz/100 m <br /> 30 MHz/10 m </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a class="mw-selflink selflink">VHF</a></b> <br /> 30 MHz/10 m <br /> 300 MHz/1 m </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a></b> <br /> 300 MHz/1 m <br /> 3 GHz/100 mm </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Super_high_frequency" title="Super high frequency">SHF</a></b> <br /> 3 GHz/100 mm <br /> 30 GHz/10 mm </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Extremely_high_frequency" title="Extremely high frequency">EHF</a></b> <br /> 30 GHz/10 mm <br /> 300 GHz/1 mm </p> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align:center;width:10em;"><div> <p><b><a href="/wiki/Tremendously_high_frequency" class="mw-redirect" title="Tremendously high frequency">THF</a></b> <br /> 300 GHz/1 mm <br /> 3 THz/0.1 mm </p> </div></td></tr></tbody></table></div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><b><span class="nowrap"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/1/1d/Radio_icon.png" decoding="async" width="32" height="23" class="mw-file-element" data-file-width="30" data-file-height="22" /></span></span> </span><a href="/wiki/Portal:Radio" title="Portal:Radio">Radio portal</a></b></div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"><style data-mw-deduplicate="TemplateStyles:r886047488">.mw-parser-output .nobold{font-weight:normal}</style></div><div role="navigation" class="navbox" aria-labelledby="Electromagnetic_spectrum" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Electromagnetic_spectrum" title="Template:Electromagnetic spectrum"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Electromagnetic_spectrum" title="Template talk:Electromagnetic spectrum"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Electromagnetic_spectrum" title="Special:EditPage/Template:Electromagnetic spectrum"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Electromagnetic_spectrum" style="font-size:114%;margin:0 4em"><a href="/wiki/Electromagnetic_spectrum" title="Electromagnetic spectrum">Electromagnetic spectrum</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2" style="padding:0.3em 0.5em 0.4em;line-height:1.25em;font-weight:bold;"><div> <ul><li><a href="/wiki/Gamma_ray" title="Gamma ray">Gamma rays</a></li> <li><a href="/wiki/X-ray" title="X-ray">X-rays</a></li> <li><a href="/wiki/Ultraviolet" title="Ultraviolet">Ultraviolet</a></li> <li><a href="/wiki/Visible_spectrum" title="Visible spectrum">Visible</a></li> <li><a href="/wiki/Infrared" title="Infrared">Infrared</a></li> <li><a href="/wiki/Microwave" title="Microwave">Microwave</a></li> <li><a href="/wiki/Radio_wave" title="Radio wave">Radio</a><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/File:Frequency_vs._wave_length.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/500px-Frequency_vs._wave_length.svg.png" decoding="async" width="500" height="65" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/750px-Frequency_vs._wave_length.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/62/Frequency_vs._wave_length.svg/1000px-Frequency_vs._wave_length.svg.png 2x" data-file-width="800" data-file-height="104" /></a><figcaption></figcaption></figure><div style="clear:both;" class=""></div><span class="nobold"><i><span style="font-size:120%">←</span> higher <a href="/wiki/Frequency" title="Frequency">frequencies</a><span class="nowrap">       </span>longer <a href="/wiki/Wavelength" title="Wavelength">wavelengths</a> <span style="font-size:120%">→</span></i></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Gamma_ray" title="Gamma ray">Gamma rays</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Very-high-energy_gamma_ray" title="Very-high-energy gamma ray">Very-high-energy gamma ray</a></li> <li><a href="/wiki/Ultra-high-energy_gamma_ray" title="Ultra-high-energy gamma ray">Ultra-high-energy gamma ray</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/X-ray" title="X-ray">X-rays</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Soft_X-ray" class="mw-redirect" title="Soft X-ray">Soft X-ray</a></li> <li><a href="/wiki/Hard_X-ray" class="mw-redirect" title="Hard X-ray">Hard X-ray</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Ultraviolet" title="Ultraviolet">Ultraviolet</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Extreme_ultraviolet" title="Extreme ultraviolet">Extreme ultraviolet</a></li> <li><a href="/wiki/Vacuum_ultraviolet" class="mw-redirect" title="Vacuum ultraviolet">Vacuum ultraviolet</a></li> <li><a href="/wiki/Lyman-alpha" title="Lyman-alpha">Lyman-alpha</a></li> <li><a href="/wiki/Far_ultraviolet" class="mw-redirect" title="Far ultraviolet">FUV</a></li> <li><a href="/wiki/Middle_ultraviolet" class="mw-redirect" title="Middle ultraviolet">MUV</a></li> <li><a href="/wiki/Near_ultraviolet" class="mw-redirect" title="Near ultraviolet">NUV</a></li> <li><a href="/wiki/Ultraviolet_C" class="mw-redirect" title="Ultraviolet C">UVC</a></li> <li><a href="/wiki/Ultraviolet_B" class="mw-redirect" title="Ultraviolet B">UVB</a></li> <li><a href="/wiki/Ultraviolet_A" class="mw-redirect" title="Ultraviolet A">UVA</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Visible_spectrum" title="Visible spectrum">Visible (optical)</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Violet_(color)" title="Violet (color)">Violet</a></li> <li><a href="/wiki/Blue" title="Blue">Blue</a></li> <li><a href="/wiki/Cyan" title="Cyan">Cyan</a></li> <li><a href="/wiki/Green" title="Green">Green</a></li> <li><a href="/wiki/Yellow" title="Yellow">Yellow</a></li> <li><a href="/wiki/Orange_(colour)" title="Orange (colour)">Orange</a></li> <li><a href="/wiki/Red" title="Red">Red</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Infrared" title="Infrared">Infrared</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Near-infrared" class="mw-redirect" title="Near-infrared">NIR</a> (<a href="/wiki/Photometric_system" title="Photometric system">Bands</a>: <a href="/wiki/J_band_(infrared)" title="J band (infrared)">J</a>, <a href="/wiki/K_band_(infrared)" title="K band (infrared)">K</a>, <a href="/wiki/H_band_(infrared)" title="H band (infrared)">H</a>)</li> <li><a href="/wiki/Infrared#Regions" title="Infrared">SWIR</a></li> <li><a href="/wiki/Infrared#Regions" title="Infrared">MWIR</a> (<a href="/wiki/Photometric_system" title="Photometric system">Bands</a>: <a href="/wiki/L_band_(infrared)" title="L band (infrared)">L</a>, <a href="/wiki/M_band_(infrared)" title="M band (infrared)">M</a>, <a href="/wiki/N_band" title="N band">N</a>)</li> <li><a href="/wiki/Infrared#Regions" title="Infrared">LWIR</a></li> <li><a href="/wiki/Far_infrared" title="Far infrared">FIR</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Microwave" title="Microwave">Microwaves</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/W_band" title="W band">W band</a></li> <li><a href="/wiki/V_band" title="V band">V band</a></li> <li><a href="/wiki/Q_band" title="Q band">Q band</a></li> <li><a href="/wiki/Ka_band" title="Ka band">K<sub>a</sub> band</a></li> <li><a href="/wiki/K_band_(IEEE)" title="K band (IEEE)">K band</a></li> <li><a href="/wiki/Ku_band" title="Ku band">K<sub>u</sub> band</a></li> <li><a href="/wiki/X_band" title="X band">X band</a></li> <li><a href="/wiki/C_band_(IEEE)" title="C band (IEEE)">C band</a></li> <li><a href="/wiki/S_band" title="S band">S band</a></li> <li><a href="/wiki/L_band" title="L band">L band</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Radio_frequency" title="Radio frequency">Radio</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Terahertz_radiation" title="Terahertz radiation">THF</a></li> <li><a href="/wiki/Extremely_high_frequency" title="Extremely high frequency">EHF</a></li> <li><a href="/wiki/Super_high_frequency" title="Super high frequency">SHF</a></li> <li><a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a></li> <li><a class="mw-selflink selflink">VHF</a></li> <li><a href="/wiki/High_frequency" title="High frequency">HF</a></li> <li><a href="/wiki/Medium_frequency" title="Medium frequency">MF</a></li> <li><a href="/wiki/Low_frequency" title="Low frequency">LF</a></li> <li><a href="/wiki/Very_low_frequency" title="Very low frequency">VLF</a></li> <li><a href="/wiki/Ultra_low_frequency" title="Ultra low frequency">ULF</a></li> <li><a href="/wiki/Super_low_frequency" title="Super low frequency">SLF</a></li> <li><a href="/wiki/Extremely_low_frequency" title="Extremely low frequency">ELF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:lavender;"><a href="/wiki/Wavelength" title="Wavelength">Wavelength</a> types</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Microwave" title="Microwave">Microwave</a></li> <li><a href="/wiki/Shortwave_radio" title="Shortwave radio">Shortwave</a></li> <li><a href="/wiki/Medium_wave" title="Medium wave">Medium wave</a></li> <li><a href="/wiki/Longwave" title="Longwave">Longwave</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Telecommunications" style="padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Telecommunications" title="Template:Telecommunications"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Telecommunications" title="Template talk:Telecommunications"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Telecommunications" title="Special:EditPage/Template:Telecommunications"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Telecommunications" style="font-size:114%;margin:0 4em"><a href="/wiki/Telecommunications" title="Telecommunications">Telecommunications</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/History_of_telecommunication" title="History of telecommunication">History</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Beacon#For_defensive_communications" title="Beacon">Beacon</a></li> <li><a href="/wiki/History_of_broadcasting" title="History of broadcasting">Broadcasting</a></li> <li><a href="/wiki/Cable_protection_system" title="Cable protection system">Cable protection system</a></li> <li><a href="/wiki/Cable_television" title="Cable television">Cable TV</a></li> <li><a href="/wiki/Communications_satellite#History" title="Communications satellite">Communications satellite</a></li> <li><a href="/wiki/Computer_network#History" title="Computer network">Computer network</a></li> <li><a href="/wiki/Data_compression" title="Data compression">Data compression</a> <ul><li><a href="/wiki/Audio_coding_format" title="Audio coding format">audio</a></li> <li><a href="/wiki/Discrete_cosine_transform" title="Discrete cosine transform">DCT</a></li> <li><a href="/wiki/Image_compression" title="Image compression">image</a></li> <li><a href="/wiki/Video_coding_format" title="Video coding format">video</a></li></ul></li> <li><a href="/wiki/Digital_media" title="Digital media">Digital media</a> <ul><li><a href="/wiki/Internet_video" title="Internet video">Internet video</a></li> <li><a href="/wiki/Online_video_platform" title="Online video platform">online video platform</a></li> <li><a href="/wiki/Social_media" title="Social media">social media</a></li> <li><a href="/wiki/Streaming_media" title="Streaming media">streaming</a></li></ul></li> <li><a href="/wiki/Drums_in_communication" title="Drums in communication">Drums</a></li> <li><a href="/wiki/Edholm%27s_law" title="Edholm's law">Edholm's law</a></li> <li><a href="/wiki/Electrical_telegraph#History" title="Electrical telegraph">Electrical telegraph</a></li> <li><a href="/wiki/Fax#History" title="Fax">Fax</a></li> <li><a href="/wiki/Heliograph#History" title="Heliograph">Heliographs</a></li> <li><a href="/wiki/Hydraulic_telegraph#Greek_hydraulic_semaphore_system" title="Hydraulic telegraph">Hydraulic telegraph</a></li> <li><a href="/wiki/Information_Age" title="Information Age">Information Age</a></li> <li><a href="/wiki/Information_revolution" class="mw-redirect" title="Information revolution">Information revolution</a></li> <li><a href="/wiki/History_of_the_Internet" title="History of the Internet">Internet</a></li> <li><a href="/wiki/Mass_media#History" title="Mass media">Mass media</a></li> <li><a href="/wiki/History_of_mobile_phones" title="History of mobile phones">Mobile phone</a> <ul><li><a href="/wiki/Smartphone" title="Smartphone">Smartphone</a></li></ul></li> <li><a href="/wiki/Optical_communication" title="Optical communication">Optical telecommunication</a></li> <li><a href="/wiki/Optical_telegraph" title="Optical telegraph">Optical telegraphy</a></li> <li><a href="/wiki/Pager" title="Pager">Pager</a></li> <li><a href="/wiki/Photophone" title="Photophone">Photophone</a></li> <li><a href="/wiki/History_of_prepaid_mobile_phones" title="History of prepaid mobile phones">Prepaid mobile phone</a></li> <li><a href="/wiki/History_of_radio" title="History of radio">Radio</a></li> <li><a href="/wiki/Radiotelephone" title="Radiotelephone">Radiotelephone</a></li> <li><a href="/wiki/Communications_satellite" title="Communications satellite">Satellite communications</a></li> <li><a href="/wiki/Semaphore" title="Semaphore">Semaphore</a> <ul><li><a href="/wiki/Phryctoria" title="Phryctoria">Phryctoria</a></li></ul></li> <li><a href="/wiki/Semiconductor" title="Semiconductor">Semiconductor</a> <ul><li><a href="/wiki/Semiconductor_device" title="Semiconductor device">device</a></li> <li><a href="/wiki/MOSFET" title="MOSFET">MOSFET</a></li> <li><a href="/wiki/History_of_the_transistor" title="History of the transistor">transistor</a></li></ul></li> <li><a href="/wiki/Smoke_signal" title="Smoke signal">Smoke signals</a></li> <li><a href="/wiki/History_of_telecommunication" title="History of telecommunication">Telecommunications history</a></li> <li><a href="/wiki/Telautograph" title="Telautograph">Telautograph</a></li> <li><a href="/wiki/Telegraphy" title="Telegraphy">Telegraphy</a></li> <li><a href="/wiki/Teleprinter" title="Teleprinter">Teleprinter</a> (teletype)</li> <li><a href="/wiki/History_of_the_telephone" title="History of the telephone">Telephone</a></li> <li><i><a href="/wiki/The_Telephone_Cases" title="The Telephone Cases">The Telephone Cases</a></i></li> <li><a href="/wiki/History_of_television" title="History of television">Television</a> <ul><li><a href="/wiki/Digital_television" title="Digital television">digital</a></li> <li><a href="/wiki/Streaming_television" title="Streaming television">streaming</a></li></ul></li> <li><a href="/wiki/Submarine_communications_cable#Early_history:_telegraph_and_coaxial_cables" title="Submarine communications cable">Undersea telegraph line</a></li> <li><a href="/wiki/History_of_videotelephony" title="History of videotelephony">Videotelephony</a></li> <li><a href="/wiki/Whistled_language" title="Whistled language">Whistled language</a></li> <li><a href="/wiki/Wireless_revolution" class="mw-redirect" title="Wireless revolution">Wireless revolution</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Pioneers</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Nasir_Ahmed_(engineer)" title="Nasir Ahmed (engineer)">Nasir Ahmed</a></li> <li><a href="/wiki/Edwin_Howard_Armstrong" title="Edwin Howard Armstrong">Edwin Howard Armstrong</a></li> <li><a href="/wiki/Mohamed_M._Atalla" title="Mohamed M. Atalla">Mohamed M. Atalla</a></li> <li><a href="/wiki/John_Logie_Baird" title="John Logie Baird">John Logie Baird</a></li> <li><a href="/wiki/Paul_Baran" title="Paul Baran">Paul Baran</a></li> <li><a href="/wiki/John_Bardeen" title="John Bardeen">John Bardeen</a></li> <li><a href="/wiki/Alexander_Graham_Bell" title="Alexander Graham Bell">Alexander Graham Bell</a></li> <li><a href="/wiki/Emile_Berliner" title="Emile Berliner">Emile Berliner</a></li> <li><a href="/wiki/Tim_Berners-Lee" title="Tim Berners-Lee">Tim Berners-Lee</a></li> <li><a href="/wiki/Francis_Blake_(inventor)" title="Francis Blake (inventor)">Francis Blake</a></li> <li><a href="/wiki/Jagadish_Chandra_Bose" title="Jagadish Chandra Bose">Jagadish Chandra Bose</a></li> <li><a href="/wiki/Charles_Bourseul" title="Charles Bourseul">Charles Bourseul</a></li> <li><a href="/wiki/Walter_Houser_Brattain" title="Walter Houser Brattain">Walter Houser Brattain</a></li> <li><a href="/wiki/Vint_Cerf" title="Vint Cerf">Vint Cerf</a></li> <li><a href="/wiki/Claude_Chappe" title="Claude Chappe">Claude Chappe</a></li> <li><a href="/wiki/Yogen_Dalal" class="mw-redirect" title="Yogen Dalal">Yogen Dalal</a></li> <li><a href="/wiki/Daniel_Davis_Jr." title="Daniel Davis Jr.">Daniel Davis Jr.</a></li> <li><a href="/wiki/Donald_Davies" title="Donald Davies">Donald Davies</a></li> <li><a href="/wiki/Amos_Dolbear" title="Amos Dolbear">Amos Dolbear</a></li> <li><a href="/wiki/Thomas_Edison" title="Thomas Edison">Thomas Edison</a></li> <li><a href="/wiki/Lee_de_Forest" title="Lee de Forest">Lee de Forest</a></li> <li><a href="/wiki/Philo_Farnsworth" title="Philo Farnsworth">Philo Farnsworth</a></li> <li><a href="/wiki/Reginald_Fessenden" title="Reginald Fessenden">Reginald Fessenden</a></li> <li><a href="/wiki/Elisha_Gray" title="Elisha Gray">Elisha Gray</a></li> <li><a href="/wiki/Oliver_Heaviside" title="Oliver Heaviside">Oliver Heaviside</a></li> <li><a href="/wiki/Robert_Hooke" title="Robert Hooke">Robert Hooke</a></li> <li><a href="/wiki/Erna_Schneider_Hoover" title="Erna Schneider Hoover">Erna Schneider Hoover</a></li> <li><a href="/wiki/Harold_Hopkins_(physicist)" title="Harold Hopkins (physicist)">Harold Hopkins</a></li> <li><a href="/wiki/Gardiner_Greene_Hubbard" title="Gardiner Greene Hubbard">Gardiner Greene Hubbard</a></li> <li><a href="/wiki/List_of_Internet_pioneers" title="List of Internet pioneers">Internet pioneers</a></li> <li><a href="/wiki/Bob_Kahn" class="mw-redirect" title="Bob Kahn">Bob Kahn</a></li> <li><a href="/wiki/Dawon_Kahng" title="Dawon Kahng">Dawon Kahng</a></li> <li><a href="/wiki/Charles_K._Kao" title="Charles K. Kao">Charles K. Kao</a></li> <li><a href="/wiki/Narinder_Singh_Kapany" title="Narinder Singh Kapany">Narinder Singh Kapany</a></li> <li><a href="/wiki/Hedy_Lamarr" title="Hedy Lamarr">Hedy Lamarr</a></li> <li><a href="/wiki/Roberto_Landell_de_Moura" title="Roberto Landell de Moura">Roberto Landell de Moura</a></li> <li><a href="/wiki/Innocenzo_Manzetti" title="Innocenzo Manzetti">Innocenzo Manzetti</a></li> <li><a href="/wiki/Guglielmo_Marconi" title="Guglielmo Marconi">Guglielmo Marconi</a></li> <li><a href="/wiki/Robert_Metcalfe" title="Robert Metcalfe">Robert Metcalfe</a></li> <li><a href="/wiki/Antonio_Meucci" title="Antonio Meucci">Antonio Meucci</a></li> <li><a href="/wiki/Samuel_Morse" title="Samuel Morse">Samuel Morse</a></li> <li><a href="/wiki/Jun-ichi_Nishizawa" title="Jun-ichi Nishizawa">Jun-ichi Nishizawa</a></li> <li><a href="/wiki/Charles_Grafton_Page" title="Charles Grafton Page">Charles Grafton Page</a></li> <li><a href="/wiki/Radia_Perlman" title="Radia Perlman">Radia Perlman</a></li> <li><a href="/wiki/Alexander_Stepanovich_Popov" class="mw-redirect" title="Alexander Stepanovich Popov">Alexander Stepanovich Popov</a></li> <li><a href="/wiki/Tivadar_Pusk%C3%A1s" title="Tivadar Puskás">Tivadar Puskás</a></li> <li><a href="/wiki/Johann_Philipp_Reis" title="Johann Philipp Reis">Johann Philipp Reis</a></li> <li><a href="/wiki/Claude_Shannon" title="Claude Shannon">Claude Shannon</a></li> <li><a href="/wiki/Almon_Brown_Strowger" title="Almon Brown Strowger">Almon Brown Strowger</a></li> <li><a href="/wiki/Henry_Sutton_(inventor)" title="Henry Sutton (inventor)">Henry Sutton</a></li> <li><a href="/wiki/Charles_Sumner_Tainter" title="Charles Sumner Tainter">Charles Sumner Tainter</a></li> <li><a href="/wiki/Nikola_Tesla" title="Nikola Tesla">Nikola Tesla</a></li> <li><a href="/wiki/Camille_Tissot" title="Camille Tissot">Camille Tissot</a></li> <li><a href="/wiki/Alfred_Vail" title="Alfred Vail">Alfred Vail</a></li> <li><a href="/wiki/Thomas_A._Watson" title="Thomas A. Watson">Thomas A. Watson</a></li> <li><a href="/wiki/Charles_Wheatstone" title="Charles Wheatstone">Charles Wheatstone</a></li> <li><a href="/wiki/Vladimir_K._Zworykin" title="Vladimir K. Zworykin">Vladimir K. Zworykin</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Transmission_medium" title="Transmission medium">Transmission<br />media</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Coaxial_cable" title="Coaxial cable">Coaxial cable</a></li> <li><a href="/wiki/Fiber-optic_communication" title="Fiber-optic communication">Fiber-optic communication</a> <ul><li><a href="/wiki/Optical_fiber" title="Optical fiber">optical fiber</a></li></ul></li> <li><a href="/wiki/Free-space_optical_communication" title="Free-space optical communication">Free-space optical communication</a></li> <li><a href="/wiki/Molecular_communication" title="Molecular communication">Molecular communication</a></li> <li><a href="/wiki/Radio_wave" title="Radio wave">Radio waves</a> <ul><li><a href="/wiki/Wireless" title="Wireless">wireless</a></li></ul></li> <li><a href="/wiki/Transmission_line" title="Transmission line">Transmission line</a> <ul><li><a href="/wiki/Telecommunication_circuit" title="Telecommunication circuit">telecommunication circuit</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Network_topology" title="Network topology">Network topology</a><br />and switching</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bandwidth_(computing)" title="Bandwidth (computing)">Bandwidth</a></li> <li><a href="/wiki/Telecommunications_link" title="Telecommunications link">Links</a></li> <li><a href="/wiki/Node_(networking)" title="Node (networking)">Nodes</a> <ul><li><a href="/wiki/Terminal_(telecommunication)" title="Terminal (telecommunication)">terminal</a></li></ul></li> <li><a href="/wiki/Network_switch" title="Network switch">Network switching</a> <ul><li><a href="/wiki/Circuit_switching" title="Circuit switching">circuit</a></li> <li><a href="/wiki/Packet_switching" title="Packet switching">packet</a></li></ul></li> <li><a href="/wiki/Telephone_exchange" title="Telephone exchange">Telephone exchange</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Multiplexing" title="Multiplexing">Multiplexing</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Space-division_multiple_access" title="Space-division multiple access">Space-division</a></li> <li><a href="/wiki/Frequency-division_multiplexing" title="Frequency-division multiplexing">Frequency-division</a></li> <li><a href="/wiki/Time-division_multiplexing" title="Time-division multiplexing">Time-division</a></li> <li><a href="/wiki/Polarization-division_multiplexing" title="Polarization-division multiplexing">Polarization-division</a></li> <li><a href="/wiki/Orbital_angular_momentum_multiplexing" title="Orbital angular momentum multiplexing">Orbital angular-momentum</a></li> <li><a href="/wiki/Code-division_multiple_access" title="Code-division multiple access">Code-division</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Concepts</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Communication_protocol" title="Communication protocol">Communication protocol</a></li> <li><a href="/wiki/Computer_network" title="Computer network">Computer network</a></li> <li><a href="/wiki/Data_communication" title="Data communication">Data transmission</a></li> <li><a href="/wiki/Store_and_forward" title="Store and forward">Store and forward</a></li> <li><a href="/wiki/Telecommunications_equipment" title="Telecommunications equipment">Telecommunications equipment</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Telecommunications_network" title="Telecommunications network">Types of network</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cellular_network" title="Cellular network">Cellular network</a></li> <li><a href="/wiki/Ethernet" title="Ethernet">Ethernet</a></li> <li><a href="/wiki/Integrated_Services_Digital_Network" class="mw-redirect" title="Integrated Services Digital Network">ISDN</a></li> <li><a href="/wiki/Local_area_network" title="Local area network">LAN</a></li> <li><a href="/wiki/Mobile_telephony" title="Mobile telephony">Mobile</a></li> <li><a href="/wiki/Next-generation_network" title="Next-generation network">NGN</a></li> <li><a href="/wiki/Public_switched_telephone_network" title="Public switched telephone network">Public Switched Telephone</a></li> <li><a href="/wiki/Radio_network" title="Radio network">Radio</a></li> <li><a href="/wiki/Television_broadcasting" class="mw-redirect" title="Television broadcasting">Television</a></li> <li><a href="/wiki/Telex" title="Telex">Telex</a></li> <li><a href="/wiki/UUCP" title="UUCP">UUCP</a></li> <li><a href="/wiki/Wide_area_network" title="Wide area network">WAN</a></li> <li><a href="/wiki/Wireless_network" title="Wireless network">Wireless network</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Telecommunications_network" title="Telecommunications network">Notable networks</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ARPANET" title="ARPANET">ARPANET</a></li> <li><a href="/wiki/BITNET" title="BITNET">BITNET</a></li> <li><a href="/wiki/CYCLADES" title="CYCLADES">CYCLADES</a></li> <li><a href="/wiki/FidoNet" title="FidoNet">FidoNet</a></li> <li><a href="/wiki/Internet" title="Internet">Internet</a></li> <li><a href="/wiki/Internet2" title="Internet2">Internet2</a></li> <li><a href="/wiki/JANET" title="JANET">JANET</a></li> <li><a href="/wiki/NPL_network" title="NPL network">NPL network</a></li> <li><a href="/wiki/Toasternet" title="Toasternet">Toasternet</a></li> <li><a href="/wiki/Usenet" title="Usenet">Usenet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Locations</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Category:Telecommunications_in_Africa" title="Category:Telecommunications in Africa">Africa</a></li> <li>Americas <ul><li><a href="/wiki/Category:Telecommunications_in_North_America" title="Category:Telecommunications in North America">North</a></li> <li><a href="/wiki/Category:Telecommunications_in_South_America" title="Category:Telecommunications in South America">South</a></li></ul></li> <li><a href="/wiki/Category:Communications_in_Antarctica" title="Category:Communications in Antarctica">Antarctica</a></li> <li><a href="/wiki/Category:Telecommunications_in_Asia" title="Category:Telecommunications in Asia">Asia</a></li> <li><a href="/wiki/Category:Telecommunications_in_Europe" title="Category:Telecommunications in Europe">Europe</a></li> <li><a href="/wiki/Category:Telecommunications_in_Oceania" title="Category:Telecommunications in Oceania">Oceania</a></li> <li>(<a href="/wiki/List_of_telecommunications_regulatory_bodies" title="List of telecommunications regulatory bodies">Global telecommunications regulation bodies</a>)</li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="nowrap"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Telecom-icon.svg/16px-Telecom-icon.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Telecom-icon.svg/24px-Telecom-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4e/Telecom-icon.svg/32px-Telecom-icon.svg.png 2x" data-file-width="500" data-file-height="500" /></span></span> </span><a href="/wiki/Portal:Telecommunication" title="Portal:Telecommunication">Telecommunication portal</a></li> <li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Telecommunications" title="Category:Telecommunications">Category</a></li> <li><span class="noviewer" typeof="mw:File"><span title="List-Class article"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/16px-Symbol_list_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/23px-Symbol_list_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/31px-Symbol_list_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Outline_of_telecommunication" title="Outline of telecommunication">Outline</a></li> <li><span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> <a href="https://commons.wikimedia.org/wiki/Category:Telecommunications" class="extiw" title="commons:Category:Telecommunications">Commons</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Analog_television_broadcasting_topics" style="padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Analogue_TV_transmitter_topics" title="Template:Analogue TV transmitter topics"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Analogue_TV_transmitter_topics" title="Template talk:Analogue TV transmitter topics"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Analogue_TV_transmitter_topics" title="Special:EditPage/Template:Analogue TV transmitter topics"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Analog_television_broadcasting_topics" style="font-size:114%;margin:0 4em"><a href="/wiki/Analog_television" title="Analog television">Analog television</a> <a href="/wiki/Outline_of_television_broadcasting" title="Outline of television broadcasting">broadcasting topics</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Broadcast_television_systems" title="Broadcast television systems">Systems</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/180-line_television_system" title="180-line television system">180-line</a></li> <li><a href="/wiki/343-line_television_system" title="343-line television system">343-line</a></li> <li><a href="/wiki/375-line_television_system" title="375-line television system">375-line</a></li> <li><a href="/wiki/405-line_television_system" title="405-line television system">405-line</a> (<a href="/wiki/CCIR_System_A" title="CCIR System A">System A</a>)</li> <li><a href="/wiki/441-line_television_system" title="441-line television system">441-line</a></li> <li><a href="/wiki/455-line_television_system" title="455-line television system">455-line</a></li> <li><a href="/wiki/525-line_television_system" class="mw-redirect" title="525-line television system">525-line</a> (<a href="/wiki/CCIR_System_M" title="CCIR System M">System M</a>)</li> <li><a href="/wiki/625-line_television_system" class="mw-redirect" title="625-line television system">625-line</a> (<a href="/wiki/CCIR_System_B" title="CCIR System B">System B</a>, <a href="/wiki/CCIR_System_C" title="CCIR System C">System C</a>, <a href="/wiki/CCIR_System_D" title="CCIR System D">System D</a>, <a href="/wiki/CCIR_System_G" title="CCIR System G">System G</a>, <a href="/wiki/CCIR_System_H" title="CCIR System H">System H</a>, <a href="/wiki/CCIR_System_I" title="CCIR System I">System I</a>, <a href="/wiki/CCIR_System_K" title="CCIR System K">System K</a>, <a href="/wiki/CCIR_System_L" title="CCIR System L">System L</a>, <a href="/wiki/CCIR_System_N" title="CCIR System N">System N</a>)</li> <li><a href="/wiki/819_line" title="819 line">819-line</a> (<a href="/wiki/CCIR_System_E" title="CCIR System E">System E</a>, <a href="/wiki/CCIR_System_E#System_F" title="CCIR System E">System F</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Color systems</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/NTSC" title="NTSC">NTSC</a></li> <li><a href="/wiki/NTSC-J" title="NTSC-J">NTSC-J</a></li> <li><a href="/wiki/Clear-Vision" title="Clear-Vision">Clear-Vision</a></li> <li><a href="/wiki/PAL" title="PAL">PAL</a></li> <li><a href="/wiki/PAL-M" title="PAL-M">PAL-M</a></li> <li><a href="/wiki/PAL-S" title="PAL-S">PAL-S</a></li> <li><a href="/wiki/PALplus" title="PALplus">PALplus</a></li> <li><a href="/wiki/SECAM" title="SECAM">SECAM</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Video</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Analog_television#Structure_of_a_video_signal" title="Analog television">Back porch</a> and <a href="/wiki/Analog_television#Structure_of_a_video_signal" title="Analog television">front porch</a></li> <li><a href="/wiki/Black_level" title="Black level">Black level</a></li> <li><a href="/wiki/Blanking_level" title="Blanking level">Blanking level</a></li> <li><a href="/wiki/Chrominance" title="Chrominance">Chrominance</a></li> <li><a href="/wiki/Chrominance_subcarrier" title="Chrominance subcarrier">Chrominance subcarrier</a></li> <li><a href="/wiki/Colorburst" title="Colorburst">Colorburst</a></li> <li><a href="/wiki/Color_killer" title="Color killer">Color killer</a></li> <li><a href="/wiki/Color_television" title="Color television">Color TV</a></li> <li><a href="/wiki/Composite_video" title="Composite video">Composite video</a></li> <li><a href="/wiki/Frame_(video)" class="mw-redirect" title="Frame (video)">Frame (video)</a></li> <li><a href="/wiki/Horizontal_scan_rate" title="Horizontal scan rate">Horizontal scan rate</a></li> <li><a href="/wiki/Horizontal_blanking_interval" title="Horizontal blanking interval">Horizontal blanking interval</a></li> <li><a href="/wiki/Luma_(video)" title="Luma (video)">Luma</a></li> <li><a href="/wiki/Nominal_analogue_blanking" title="Nominal analogue blanking">Nominal analogue blanking</a></li> <li><a href="/wiki/Overscan" title="Overscan">Overscan</a></li> <li><a href="/wiki/Raster_scan" title="Raster scan">Raster scan</a></li> <li><a href="/wiki/Safe_area_(television)" title="Safe area (television)">Safe area</a></li> <li><a href="/wiki/Television_lines" title="Television lines">Television lines</a></li> <li><a href="/wiki/Vertical_blanking_interval" title="Vertical blanking interval">Vertical blanking interval</a></li> <li><a href="/wiki/White_clipper" title="White clipper">White clipper</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Sound</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Multichannel_television_sound" class="mw-redirect" title="Multichannel television sound">Multichannel television sound</a></li> <li><a href="/wiki/NICAM" title="NICAM">NICAM</a></li> <li><a href="/wiki/Sound-in-Syncs" title="Sound-in-Syncs">Sound-in-Syncs</a></li> <li><a href="/wiki/Zweikanalton" title="Zweikanalton">Zweikanalton</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Modulation</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Frequency_modulation" title="Frequency modulation">Frequency modulation</a></li> <li><a href="/wiki/Quadrature_amplitude_modulation" title="Quadrature amplitude modulation">Quadrature amplitude modulation</a></li> <li><a href="/wiki/Single-sideband_modulation#Vestigial_sideband_(VSB)" title="Single-sideband modulation">Vestigial sideband modulation (VSB)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Transmission</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Amplifier#Electronic_amplifiers" title="Amplifier">Amplifiers</a></li> <li><a href="/wiki/Antenna_(radio)" title="Antenna (radio)">Antenna (radio)</a></li> <li><a href="/wiki/Broadcast_transmitter" title="Broadcast transmitter">Broadcast transmitter</a>/<a href="/wiki/Transmitter_station" title="Transmitter station">Transmitter station</a></li> <li><a href="/wiki/Resonator#Electromagnetic" title="Resonator">Cavity amplifier</a></li> <li><a href="/wiki/Differential_gain" title="Differential gain">Differential gain</a></li> <li><a href="/wiki/Differential_phase" title="Differential phase">Differential phase</a></li> <li><a href="/wiki/Diplexer" title="Diplexer">Diplexer</a></li> <li><a href="/wiki/Dipole_antenna" title="Dipole antenna">Dipole antenna</a></li> <li><a href="/wiki/Dummy_load" title="Dummy load">Dummy load</a></li> <li><a href="/wiki/Frequency_mixer" title="Frequency mixer">Frequency mixer</a></li> <li><a href="/wiki/Intercarrier_method" title="Intercarrier method">Intercarrier method</a></li> <li><a href="/wiki/Intermediate_frequency" title="Intermediate frequency">Intermediate frequency</a></li> <li><a href="/wiki/Output_power_of_an_analog_TV_transmitter" title="Output power of an analog TV transmitter">Output power of an analog TV transmitter</a></li> <li><a href="/wiki/Pre-emphasis" class="mw-redirect" title="Pre-emphasis">Pre-emphasis</a></li> <li><a href="/wiki/Residual_carrier" title="Residual carrier">Residual carrier</a></li> <li><a href="/wiki/Split_sound_system" title="Split sound system">Split sound system</a></li> <li><a href="/wiki/Superheterodyne_transmitter" title="Superheterodyne transmitter">Superheterodyne transmitter</a></li> <li><a href="/wiki/Television_receive-only" title="Television receive-only">Television receive-only</a></li> <li><a href="/wiki/Direct-broadcast_satellite_television" class="mw-redirect" title="Direct-broadcast satellite television">Direct-broadcast satellite television</a></li> <li><a href="/wiki/Television_transmitter" title="Television transmitter">Television transmitter</a></li> <li><a href="/wiki/Terrestrial_television" title="Terrestrial television">Terrestrial television</a></li> <li><a href="/wiki/Transposer" title="Transposer">Transposer</a></li> <li><a href="/wiki/Digital_television_transition" title="Digital television transition">Digital television transition</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Radio_frequency" title="Radio frequency">Frequencies</a> & bands</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Frequency_offset" title="Frequency offset">Frequency offset</a></li> <li><a href="/wiki/Microwave_transmission" title="Microwave transmission">Microwave transmission</a></li> <li><a href="/wiki/Television_channel_frequencies" title="Television channel frequencies">Television channel frequencies</a></li> <li><a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a></li> <li><a class="mw-selflink selflink">VHF</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Radio_propagation" title="Radio propagation">Propagation</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Beam_tilt" title="Beam tilt">Beam tilt</a></li> <li><a href="/wiki/Distortion" title="Distortion">Distortion</a></li> <li><a href="/wiki/Earth_bulge" class="mw-redirect" title="Earth bulge">Earth bulge</a></li> <li><a href="/wiki/Field_strength_in_free_space" class="mw-redirect" title="Field strength in free space">Field strength in free space</a></li> <li><a href="/wiki/Noise_(electronics)" title="Noise (electronics)">Noise (electronics)</a></li> <li><a href="/wiki/Null_fill" title="Null fill">Null fill</a></li> <li><a href="/wiki/Path_loss" title="Path loss">Path loss</a></li> <li><a href="/wiki/Radiation_pattern" title="Radiation pattern">Radiation pattern</a></li> <li><a href="/wiki/Skew_(antenna)" title="Skew (antenna)">Skew</a></li> <li><a href="/wiki/Television_interference" title="Television interference">Television interference</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Testing</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Distortionmeter" title="Distortionmeter">Distortionmeter</a></li> <li><a href="/wiki/Field_strength_meter" title="Field strength meter">Field strength meter</a></li> <li><a href="/wiki/Vectorscope" title="Vectorscope">Vectorscope</a></li> <li><a href="/wiki/VIT_signals" title="VIT signals">VIT signals</a></li> <li><a href="/wiki/Zero_reference_pulse" title="Zero reference pulse">Zero reference pulse</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Artifacts</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dot_crawl" title="Dot crawl">Dot crawl</a></li> <li><a href="/wiki/Ghosting_(television)" title="Ghosting (television)">Ghosting</a></li> <li><a href="/wiki/Hanover_bars" title="Hanover bars">Hanover bars</a></li> <li><a href="/wiki/Sparklies" title="Sparklies">Sparklies</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Analog_and_digital_audio_broadcasting" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Audio_broadcasting" title="Template:Audio broadcasting"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Audio_broadcasting" title="Template talk:Audio broadcasting"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Audio_broadcasting" title="Special:EditPage/Template:Audio broadcasting"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Analog_and_digital_audio_broadcasting" style="font-size:114%;margin:0 4em"><a href="/wiki/Analog_recording" title="Analog recording">Analog</a> and <a href="/wiki/Digital_audio" title="Digital audio">digital audio</a> <a href="/wiki/Broadcasting" title="Broadcasting">broadcasting</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Terrestrial</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Radio" title="Radio">Radio</a> <a href="/wiki/Modulation" title="Modulation">modulation</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Amplitude_modulation" title="Amplitude modulation">AM</a></li> <li><a href="/wiki/Frequency_modulation" title="Frequency modulation">FM</a></li> <li><a href="/wiki/Orthogonal_frequency-division_multiplexing" title="Orthogonal frequency-division multiplexing">COFDM</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Frequency_allocation" title="Frequency allocation">Frequency allocations</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Longwave" title="Longwave">LW</a> (<a href="/wiki/Low_frequency" title="Low frequency">LF</a>)</li> <li><a href="/wiki/Medium_wave" title="Medium wave">MW</a> (<a href="/wiki/Medium_frequency" title="Medium frequency">MF</a>)</li> <li><a href="/wiki/Shortwave_radio" title="Shortwave radio">SW</a> (<a href="/wiki/High_frequency" title="High frequency">HF</a>)</li> <li><a class="mw-selflink selflink">VHF</a> (<a href="/wiki/Band_I" title="Band I">low</a> / <a href="/wiki/Band_II" title="Band II">mid</a> / <a href="/wiki/Band_III" title="Band III">high</a>)</li> <li><a href="/wiki/L_band" title="L band">L band</a> (<a href="/wiki/Ultra_high_frequency" title="Ultra high frequency">UHF</a>)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Digital systems</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/CAM-D" title="CAM-D">CAM-D</a></li> <li><a href="/wiki/Digital_Audio_Broadcasting" title="Digital Audio Broadcasting">DAB/DAB+</a></li> <li><a href="/wiki/Digital_Radio_Mondiale" title="Digital Radio Mondiale">DRM/DRM+</a></li> <li><a href="/wiki/ISDB-T#ISDB-Tsb" class="mw-redirect" title="ISDB-T">ISDB-Tsb</a></li> <li><a href="/wiki/FMeXtra" title="FMeXtra">FMeXtra</a></li> <li><a href="/wiki/HD_Radio" title="HD Radio">HD Radio</a></li> <li>CDR</li> <li><a href="/wiki/DVB-T2" title="DVB-T2">DVB-T2 Lite</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Satellite</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Frequency allocations</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/C_band_(IEEE)" title="C band (IEEE)">C band</a></li> <li><a href="/wiki/Ku_band" title="Ku band">K<sub>u</sub> band</a></li> <li><a href="/wiki/L_band" title="L band">L band</a></li> <li><a href="/wiki/S_band" title="S band">S band</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Digital systems</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Astra_Digital_Radio" title="Astra Digital Radio">ADR</a></li> <li><a href="/wiki/Digital_audio_broadcasting" class="mw-redirect" title="Digital audio broadcasting">DAB-S</a></li> <li><a href="/wiki/DVB-SH" title="DVB-SH">DVB-SH</a></li> <li><a href="/wiki/S-DMB" title="S-DMB">S-DMB</a></li> <li><a href="/wiki/ETSI_Satellite_Digital_Radio" title="ETSI Satellite Digital Radio">SDR</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Commercial_broadcasting" title="Commercial broadcasting">Commercial radio</a> providers</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sirius_XM" title="Sirius XM">Sirius XM</a> <ul><li><a href="/wiki/Sirius_XM_Canada" title="Sirius XM Canada">Canada</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Audio_codec" title="Audio codec">Codecs</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Advanced_Audio_Coding" title="Advanced Audio Coding">AAC</a></li> <li><a href="/wiki/Extended_Adaptive_Multi-Rate_%E2%80%93_Wideband" title="Extended Adaptive Multi-Rate – Wideband">AMR-WB+</a></li> <li><a href="/wiki/High-Definition_Coding" title="High-Definition Coding">HDC</a></li> <li><a href="/wiki/High-Efficiency_Advanced_Audio_Coding" title="High-Efficiency Advanced Audio Coding">HE-AAC</a></li> <li><a href="/wiki/MPEG-1_Audio_Layer_II" title="MPEG-1 Audio Layer II">MPEG-1 Audio Layer II</a></li> <li><a href="/wiki/Dynamic_Resolution_Adaptation" title="Dynamic Resolution Adaptation">DRA+</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Subcarrier" title="Subcarrier">Subcarrier</a> signals</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Amplitude_modulation_signalling_system" title="Amplitude modulation signalling system">AMSS</a></li> <li><a href="/wiki/DirectBand" title="DirectBand">DirectBand</a></li> <li><a href="/wiki/Program-associated_data" title="Program-associated data">PAD</a></li> <li><a href="/wiki/Radio_Data_System" title="Radio Data System">RDS/RBDS</a></li> <li><a href="/wiki/Subsidiary_communications_authority" title="Subsidiary communications authority">SCA/SCMO</a></li> <li><a href="/wiki/Data_Radio_Channel" title="Data Radio Channel">DARC</a></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Related_topics" style="font-size:114%;margin:0 4em">Related topics</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Technical (audio)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Audio_data_compression" class="mw-redirect" title="Audio data compression">Audio data compression</a></li> <li><a href="/wiki/Audio_signal_processing" title="Audio signal processing">Audio signal processing</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Technical (<a href="/wiki/AM_stereo" title="AM stereo">AM stereo</a> formats)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AM_stereo#Belar_System" title="AM stereo">Belar</a></li> <li><a href="/wiki/C-QUAM" title="C-QUAM">C-QUAM</a></li> <li><a href="/wiki/AM_stereo#Harris_System" title="AM stereo">Harris</a></li> <li><a href="/wiki/AM_stereo#Kahn-Hazeltine" title="AM stereo">Kahn-Hazeltine</a></li> <li><a href="/wiki/AM_stereo#Magnavox_System" title="AM stereo">Magnavox</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Technical (emission)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AM_broadcasting" title="AM broadcasting">AM broadcasting</a></li> <li><a href="/wiki/AM_expanded_band" title="AM expanded band">AM expanded band</a></li> <li><a href="/wiki/Cable_radio" title="Cable radio">Cable radio</a></li> <li><a href="/wiki/Digital_radio" title="Digital radio">Digital radio</a></li> <li><a href="/wiki/Error_detection_and_correction" title="Error detection and correction">Error detection and correction</a></li> <li><a href="/wiki/FM_broadcast_band" title="FM broadcast band">FM broadcast band</a></li> <li><a href="/wiki/FM_broadcasting" title="FM broadcasting">FM broadcasting</a></li> <li><a href="/wiki/FM_extended_band_in_Brazil" title="FM extended band in Brazil">FM extended band in Brazil</a></li> <li><a href="/wiki/Multipath_propagation" title="Multipath propagation">Multipath propagation</a></li> <li><a href="/wiki/Shortwave_relay_station" title="Shortwave relay station">Shortwave relay station</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Cultural</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/History_of_radio" title="History of radio">History of radio</a></li> <li><a href="/wiki/International_broadcasting" title="International broadcasting">International broadcasting</a></li></ul> </div></td></tr><tr><td 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