{"id":13729,"date":"2025-10-28T15:57:23","date_gmt":"2025-10-28T07:57:23","guid":{"rendered":"https:\/\/bdtime.cn\/?p=13729"},"modified":"2026-01-29T17:34:25","modified_gmt":"2026-01-29T09:34:25","slug":"explication-du-journal-ptp","status":"publish","type":"post","link":"https:\/\/bdpnt.com\/fr\/explication-du-journal-ptp\/","title":{"rendered":"Interpr\u00e9tation du journal PTP"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"13729\" class=\"elementor elementor-13729\" data-elementor-post-type=\"post\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-3bcb7f7 e-flex e-con-boxed e-con e-parent\" data-id=\"3bcb7f7\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5da2529 elementor-widget elementor-widget-woocommerce-breadcrumb\" data-id=\"5da2529\" data-element_type=\"widget\" data-widget_type=\"woocommerce-breadcrumb.default\">\n\t\t\t\t\t<nav class=\"woocommerce-breadcrumb\" aria-label=\"Breadcrumb\" data-no-translation=\"\" data-trp-gettext=\"\">Accueil<\/nav>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-ebc9f9d e-con-full e-flex e-con e-parent\" data-id=\"ebc9f9d\" data-element_type=\"container\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-bb384cd e-flex e-con-boxed e-con e-child\" data-id=\"bb384cd\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-414ece2 elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"414ece2\" data-element_type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Interpr\u00e9tation du journal PTP<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6fa4f72 elementor-widget elementor-widget-spacer\" data-id=\"6fa4f72\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-084fcc1 e-flex e-con-boxed e-con e-parent\" data-id=\"084fcc1\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1aefe63 elementor-widget elementor-widget-spacer\" data-id=\"1aefe63\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d7faed8 elementor-widget elementor-widget-heading\" data-id=\"d7faed8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Interpr\u00e9tation du journal PTP<\/h3>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-dc68cce e-flex e-con-boxed e-con e-parent\" data-id=\"dc68cce\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1b1f33e elementor-widget elementor-widget-heading\" data-id=\"1b1f33e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">rms 16 max 33 freq -993 +\/- 21 delay 510 +\/- 0<\/h4>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-444f885 e-flex e-con-boxed e-con e-parent\" data-id=\"444f885\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0f5ab23 elementor-widget elementor-widget-spacer\" data-id=\"0f5ab23\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-b1f29d0 e-flex e-con-boxed e-con e-parent\" data-id=\"b1f29d0\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-7e53cdb e-con-full e-flex e-con e-child\" data-id=\"7e53cdb\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-17a7cbc elementor-widget elementor-widget-text-editor\" data-id=\"17a7cbc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><b>1. rms 16<\/b><\/strong><\/p><p>Indique l'\"erreur moyenne de synchronisation\" en nanosecondes (ns).<\/p><p>Cette valeur refl\u00e8te le niveau global de stabilit\u00e9 du d\u00e9calage temporel entre l'appareil et l'horloge ma\u00eetresse. rms 16 signifie que l'\u00e9cart moyen n'est que de 16ns, ce qui est d\u00e9j\u00e0 tr\u00e8s faible et se situe dans le domaine de la synchronisation de haute pr\u00e9cision. Plus la valeur est petite, plus la synchronisation est pr\u00e9cise.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-1b2ba22 e-con-full e-flex e-con e-child\" data-id=\"1b2ba22\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-95a83b9 elementor-widget elementor-widget-text-editor\" data-id=\"95a83b9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><b>2,<\/b><\/strong><strong><b>max 33<\/b><\/strong><\/p><p>Indique la \"d\u00e9viation instantan\u00e9e maximale\", toujours en nanosecondes.<\/p><p>Sur l'ensemble de la p\u00e9riode statistique, l'erreur maximale est de 33ns, ce qui refl\u00e8te la d\u00e9viation du \"pire moment\". Les valeurs max et rms ne sont pas tr\u00e8s diff\u00e9rentes, ce qui signifie que la stabilit\u00e9 globale est tr\u00e8s bonne et qu'il n'y a pas de gigue importante.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-3082ed9 e-con-full e-flex e-con e-child\" data-id=\"3082ed9\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e0b3743 elementor-widget elementor-widget-text-editor\" data-id=\"e0b3743\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><b>3. Fr\u00e9quence -993 +\/- 21<\/b><\/strong><\/p><p>Elle indique dans quelle mesure le protocole PTP corrige la fr\u00e9quence du cristal local en parties par milliard (PPB).<\/p><p>-993 Indique que l'horloge locale de l'appareil est l\u00e9g\u00e8rement plus rapide et que le PTP \"ralentit\" pour calibrer. Cette valeur de d\u00e9calage est stable, ce qui indique que le servo a une bonne compr\u00e9hension des caract\u00e9ristiques du cristal.<\/p><p>+\/- 21 indique la plage de fluctuation de la valeur de correction, c'est-\u00e0-dire que l'instabilit\u00e9 de la fr\u00e9quence est tr\u00e8s faible et que l'\u00e9tat du servo est r\u00e9gulier et sain.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-22160e4 e-con-full e-flex e-con e-child\" data-id=\"22160e4\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ca2f97e elementor-widget elementor-widget-text-editor\" data-id=\"ca2f97e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><b>4. retard 510 +\/- 0<\/b><\/strong><\/p><p>delay est le d\u00e9lai unidirectionnel du r\u00e9seau en nanosecondes transmis de l'horloge ma\u00eetresse \u00e0 l'appareil.<\/p><p>510 indique que la latence moyenne est d'environ 0,51 microseconde, ce qui est tr\u00e8s rapide et indique d'excellentes conditions de r\u00e9seau.<\/p><p>+\/- 0 Indique que la latence du r\u00e9seau n'a pas fluctu\u00e9 pendant cette p\u00e9riode et que les donn\u00e9es sont tr\u00e8s coh\u00e9rentes. Dans ce cas, la synchronisation PTP est la plus efficace.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-60b55bd e-con-full e-flex e-con e-child\" data-id=\"60b55bd\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-90c89a0 elementor-widget elementor-widget-text-editor\" data-id=\"90c89a0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong><b>5. sur la signification de +\/-<\/b><\/strong><\/p><p>La valeur +\/- apr\u00e8s chaque param\u00e8tre repr\u00e9sente l'\u00e9tendue des fluctuations (c'est-\u00e0-dire l'\"\u00e9cart-type\"), refl\u00e9tant la stabilit\u00e9 du syst\u00e8me.<\/p><ul><li>plus c'est petit, mieux c'est<\/li><li>Une valeur de 0 est id\u00e9ale, indiquant qu'il n'y a pas de gigue ou de fluctuation, ce qui signifie que le chemin du r\u00e9seau et l'\u00e9tat de l'appareil sont tr\u00e8s stables.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-f2c1146 e-flex e-con-boxed e-con e-parent\" data-id=\"f2c1146\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-65bab03 elementor-hidden-desktop elementor-hidden-tablet elementor-widget elementor-widget-spacer\" data-id=\"65bab03\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d4f716 elementor-widget elementor-widget-image\" data-id=\"1d4f716\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"927\" height=\"404\" src=\"https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/10\/wechat_2025-10-28_162218_195.png\" class=\"attachment-large size-large wp-image-13738\" alt=\"\" srcset=\"https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/10\/wechat_2025-10-28_162218_195.png 927w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/10\/wechat_2025-10-28_162218_195-300x131.png 300w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/10\/wechat_2025-10-28_162218_195-768x335.png 768w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/10\/wechat_2025-10-28_162218_195-18x8.png 18w, https:\/\/bdpnt.com\/wp-content\/uploads\/2025\/10\/wechat_2025-10-28_162218_195-600x261.png 600w\" sizes=\"(max-width: 927px) 100vw, 927px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c6c066a elementor-hidden-desktop elementor-hidden-tablet elementor-widget elementor-widget-spacer\" data-id=\"c6c066a\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p> rms 16<br \/>\nIndique l'\"erreur moyenne de synchronisation\" en nanosecondes (ns).<br \/>\nCette valeur refl\u00e8te le niveau global de stabilit\u00e9 du d\u00e9calage temporel entre l'appareil et l'horloge ma\u00eetresse. rms 16 signifie que l'\u00e9cart moyen n'est que de 16ns, ce qui est d\u00e9j\u00e0 tr\u00e8s faible et se situe dans le domaine de la synchronisation de haute pr\u00e9cision. Plus la valeur est petite, plus la synchronisation est pr\u00e9cise.<\/p>","protected":false},"author":1,"featured_media":13730,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[274],"tags":[],"class_list":["post-13729","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - 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