{"id":1904,"date":"2025-08-14T11:18:40","date_gmt":"2025-08-14T09:18:40","guid":{"rendered":"https:\/\/acriv.org\/WP\/?page_id=1904"},"modified":"2025-08-14T11:18:40","modified_gmt":"2025-08-14T09:18:40","slug":"%e2%9a%99%ef%b8%8fvhf","status":"publish","type":"page","link":"https:\/\/acriv.org\/WP\/%e2%9a%99%ef%b8%8fvhf\/","title":{"rendered":"\u2699\ufe0fVHF"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"265\" src=\"https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/08\/image-61.png\" alt=\"\" class=\"wp-image-1906\" style=\"width:467px;height:auto\" srcset=\"https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/08\/image-61.png 1024w, https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/08\/image-61-300x78.png 300w, https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/08\/image-61-768x199.png 768w, https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/08\/image-61-800x207.png 800w, https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/08\/image-61-650x168.png 650w, https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/08\/image-61-310x80.png 310w, https:\/\/acriv.org\/WP\/wp-content\/uploads\/2025\/08\/image-61-150x39.png 150w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>En aviation, une <strong>VHF<\/strong> (<em>Very High Frequency radio<\/em>) est la radio principale utilis\u00e9e pour les <strong>communications vocales air-sol et air-air<\/strong>.<br>C\u2019est l\u2019outil qui permet au pilote de parler avec le contr\u00f4le a\u00e9rien, d\u2019autres avions ou des services au sol.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">1. <strong>Principe<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La VHF aviation fonctionne en <strong>radiot\u00e9l\u00e9phonie<\/strong> dans la bande des <strong>fr\u00e9quences tr\u00e8s hautes<\/strong> (VHF), ce qui permet :\n<ul class=\"wp-block-list\">\n<li>Une bonne <strong>qualit\u00e9 audio<\/strong>.<\/li>\n\n\n\n<li>Moins de parasites que les ondes HF ou MF.<\/li>\n\n\n\n<li>Une port\u00e9e limit\u00e9e \u00e0 la <strong>ligne de vis\u00e9e<\/strong> (pas de rebond sur l\u2019ionosph\u00e8re).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. <strong>Plage de fr\u00e9quences<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Bande VHF aviation<\/strong> : <strong>118.000 MHz \u00e0 136.975 MHz<\/strong>.<\/li>\n\n\n\n<li>Chaque fr\u00e9quence correspond \u00e0 un canal attribu\u00e9 \u00e0 un service (contr\u00f4le d\u2019approche, tour, sol, ATIS, etc.).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. <strong>Espacement des canaux<\/strong><\/h2>\n\n\n\n<p>Historiquement :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>25 kHz<\/strong> : un canal tous les 0,025 MHz (ex. 118.000, 118.025, 118.050\u2026).<\/li>\n<\/ul>\n\n\n\n<p>Aujourd\u2019hui, en Europe et dans de nombreuses zones :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>8,33 kHz<\/strong> : espacement plus fin pour augmenter le nombre de canaux disponibles.\n<ul class=\"wp-block-list\">\n<li>Ex. 118.005, 118.010, 118.015 MHz\u2026<\/li>\n\n\n\n<li>Multiplie par trois la capacit\u00e9 de la bande.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udca1 Les radios doivent \u00eatre <strong>8.33 kHz compatibles<\/strong> pour pouvoir s\u00e9lectionner ces nouvelles fr\u00e9quences.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. <strong>Limites et caract\u00e9ristiques<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Port\u00e9e<\/strong> : environ 200 NM \u00e0 haute altitude, beaucoup moins pr\u00e8s du sol (limit\u00e9 par courbure de la Terre et obstacles).<\/li>\n\n\n\n<li><strong>Mode d\u2019\u00e9mission<\/strong> : AM (<em>Amplitude Modulation<\/em>) \u2014 plus robuste aux interf\u00e9rences de fr\u00e9quences proches.<\/li>\n\n\n\n<li><strong>Utilisation<\/strong> : communication ATC, coordination, annonces automatiques (ATIS).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. <strong>R\u00e9sum\u00e9 visuel<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Caract\u00e9ristique<\/th><th>Valeur<\/th><\/tr><\/thead><tbody><tr><td>Bande<\/td><td>118.000 \u2013 136.975 MHz<\/td><\/tr><tr><td>Modulation<\/td><td>AM<\/td><\/tr><tr><td>Espacement canaux<\/td><td>25 kHz (ancien) \/ 8,33 kHz (actuel)<\/td><\/tr><tr><td>Port\u00e9e<\/td><td>Ligne de vis\u00e9e<\/td><\/tr><tr><td>Usage<\/td><td>Communications air-sol et air-air<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En aviation, une VHF (Very High Frequency radio) est la radio principale utilis\u00e9e pour les communications vocales air-sol et air-air.C\u2019est l\u2019outil qui permet au pilote de parler avec le contr\u00f4le a\u00e9rien, d\u2019autres avions ou des services au sol. 1. Principe 2. Plage de fr\u00e9quences 3. Espacement des canaux Historiquement : Aujourd\u2019hui, en Europe et dans de nombreuses zones : \ud83d\udca1<\/p>\n<p><a class=\"more-link\" href=\"https:\/\/acriv.org\/WP\/%e2%9a%99%ef%b8%8fvhf\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1904","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/pages\/1904","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/comments?post=1904"}],"version-history":[{"count":1,"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/pages\/1904\/revisions"}],"predecessor-version":[{"id":1907,"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/pages\/1904\/revisions\/1907"}],"wp:attachment":[{"href":"https:\/\/acriv.org\/WP\/wp-json\/wp\/v2\/media?parent=1904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}