{"id":2234,"date":"2010-10-01T00:00:53","date_gmt":"2010-09-30T15:00:53","guid":{"rendered":"https:\/\/micronix-jp.com\/?p=2234"},"modified":"2023-08-01T10:44:02","modified_gmt":"2023-08-01T01:44:02","slug":"c_n","status":"publish","type":"post","link":"https:\/\/micronix-jp.com\/english\/note\/application\/c_n.html","title":{"rendered":"C\/N measurement using the channel power measurement"},"content":{"rendered":"<p class=\"has-large-font-size\"><strong>Handheld spectrum analyzer enables easy C\/N ratio measurement. <br> Judgement of stable receiving of such as digital broadcasting is made easy.<\/strong><\/p><div class=\"wp-block-vk-blocks-table-of-contents-new vk_tableOfContents vk_tableOfContents-style-default tabs\"><div class=\"tab\"><div class=\"vk_tableOfContents_title\">\u76ee\u6b21<\/div><input type=\"checkbox\" id=\"chck1\"\/><label class=\"tab-label vk_tableOfContents_openCloseBtn button_status button_status-close\" for=\"chck1\"><\/label><ul class=\"vk_tableOfContents_list tab_content-close\"><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-ac57f489-0315-4f49-acf0-58416a96ebcb\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">1. <\/span>Application<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-ab2799d3-0425-4b29-9c34-aa47a483bd2e\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">2. <\/span>Solution<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-3\" data-reactroot=\"\"><a href=\"#vk-htags-38e6b85c-9370-4e6f-abfe-b01d4cebdc42\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">2.1. <\/span>How to measure C\/N ratio<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-8294459f-39bb-4df8-a1ff-6478c442f70c\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">3. <\/span>System configuration<\/a><\/li><li class=\"vk_tableOfContents_list_item vk_tableOfContents_list_item-h-2\" data-reactroot=\"\"><a href=\"#vk-htags-0be298e9-aba0-4f2e-ad79-f0ba2ef4678d\" class=\"vk_tableOfContents_list_item_link\"><span class=\"vk_tableOfContents_list_item_link_preNumber\">4. <\/span>Products introduction<\/a><\/li><\/ul><\/div><\/div><h2 class=\"wp-block-heading\" id=\"vk-htags-ac57f489-0315-4f49-acf0-58416a96ebcb\">Application<\/h2><p> In communication by digital modulation such as digital broadcasting, the carrier power vs noise ratio (C \/ N ratio) is important for stable receiving. Because deterioration of C \/ N ratio causes a rapid deterioration of the bit error rate (BER). As a result, it becomes impossible to reproduce the transmitted data correctly. <\/p><p>In our handheld spectrum analyzer MSA438, C \/ N ratio can be measured  using \"Channel power measurement\" function. <\/p><ul class=\"wp-block-list\"><li>Precise measurement and evaluation by a full-fledged spectrum analyzer.<\/li>\n\n<li>Writing report becomes easy by saving  measurement result (screen, data) into USB memory.<\/li>\n\n<li>It is easy to use in the field because of small &amp; lightweight equipment and 4 hours battery operation.<\/li><\/ul><h2 class=\"vk_block-margin-lg--margin-top wp-block-heading\" id=\"vk-htags-ab2799d3-0425-4b29-9c34-aa47a483bd2e\">Solution<\/h2><ul class=\"wp-block-list\"><li>C \/ N ratio is expressed by the following equation on condition of carrier power Pc and noise power Pn.<\/li>\n\n<li>So, both power values of a carrier in the specified band and a noise out of band are needed.<\/li>\n\n<li>On the other hand, the handheld spectrum analyzer MSA438 has a channel power measurement function. It is possible to determine the C \/ N ratio from the following calculation measuring each of the channel power (carrier) and noise power.<\/li><\/ul><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><p id=\"borderBox\">A.Channel power(mW) = 10{Pc(dBm)\/10}<br>B.Noise power(mW) = 10{P\uff54(dBm)\/10}\u3000- Channel power(mW)<\/p>\n\n<p>Pc: channel power in specified band \/ Pt: total power in screen<br>C\/N ratio(dB) = 10*Log(channel power\/noise power)<\/p><\/div>\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-vk-blocks-select-post-list vk_posts vk_posts-postType-post vk_posts-layout-media vk_postList\"><div id=\"post-5787\" class=\"vk_post vk_post-postType-product media vk_post-col-xs-12 vk_post-col-sm-12 vk_post-col-md-12 vk_post-col-lg-12 vk_post-col-xl-12 vk_post-col-xxl-12 post-2234 post type-post status-publish format-standard has-post-thumbnail hentry category-category-note tag-market-broadcasting tag-application-spectrum-analyzer\"><div class=\"vk_post_imgOuter media-img\" style=\"background-image:url(https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620.png)\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-300x300.png\" class=\"vk_post_imgOuter_img wp-post-image\" alt=\"\" srcset=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/div><!-- [ \/.vk_post_imgOuter ] --><div class=\"vk_post_body media-body\"><h5 class=\"vk_post_title media-title\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\">Handheld Spectrum Analyzer MSA438<\/a><\/h5><p class=\"vk_post_excerpt media-text\">The most popular model in MSA 400 series.<br \/>\r\nMeasurement frequency : 50kHz to 3.3GHz <\/p><\/div><!-- [ \/.media-body ] --><\/div><!-- [ \/.media ] --><\/div>\n\n<p><\/p><\/div><\/div><h3 class=\"vk_block-margin-md--margin-top wp-block-heading\" id=\"vk-htags-38e6b85c-9370-4e6f-abfe-b01d4cebdc42\">How to measure C\/N ratio<\/h3><ol class=\"wp-block-list\"><li>Set Band measurement mode of channel power measurement.<br>\n[MEAS] key  =&gt;  select \"BAND\" with F1[MODE] <\/li>\n\n<li>Set the frequency and band of carrier.<br>\n<span class=\"green\"><\/span>Adjust Band part to band of carrier by using encoder.<br>\nStart measurement. <\/li>\n\n<li>Set Total measurement mode of channel power measurement.<br>\n<span class=\"green\"><\/span>Select \"Total\" by F1[MODE].<br>\nStart measurement. <br>\nThe value at lower right of screen is total power in screen Pt.<\/li>\n\n<li>C\/N ratio is calculated based on the equation shown above. <br> Pc=3.64dBm\u3001Pt=3.72dBm<ol class=\"wp-block-list\" type=\"A\"><li>Channel power= 2.312\uff4dW\u3001Noise power=2.355mW - 2.312mW = 0.043mW<\/li>\n\n<li>C\/N ratio= 10*Log(2.312\/0.043) = 17.3dB<\/li><\/ol><\/li>\n\n<li>\u2234 C\/N ratio<\/li>\n\n<li>17.3dB<\/li><\/ol><h2 class=\"vk_block-margin-lg--margin-top wp-block-heading\" id=\"vk-htags-8294459f-39bb-4df8-a1ff-6478c442f70c\">System configuration<\/h2><figure class=\"wp-block-flexible-table-block-table\"><table class=\"\"><tbody><tr><td><a href=\"\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\">3.3GHz Spectrum analyzer [MSA438]<\/a><\/td><\/tr><tr><td><a href=\"\/english\/products\/spectrum-analyzer\/option\/mb400.html\">Dedicated battery [MB400]<\/a><\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"vk_block-margin-lg--margin-top wp-block-heading\" id=\"vk-htags-0be298e9-aba0-4f2e-ad79-f0ba2ef4678d\">Products introduction<\/h2><div class=\"wp-block-vk-blocks-select-post-list vk_posts vk_posts-postType-post vk_posts-layout-card-noborder vk_postList\"><div id=\"post-5787\" class=\"vk_post vk_post-postType-product card card-noborder vk_post-col-xs-12 vk_post-col-sm-6 vk_post-col-md-3 vk_post-col-lg-3 vk_post-col-xl-3 vk_post-col-xxl-3 post-2234 post type-post status-publish format-standard has-post-thumbnail hentry category-category-note tag-market-broadcasting tag-application-spectrum-analyzer\"><div class=\"vk_post_imgOuter\" style=\"background-image:url(https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620.png)\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-300x300.png\" class=\"vk_post_imgOuter_img card-img-top wp-post-image\" alt=\"\" srcset=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-600x600.png 600w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2008\/05\/msa438_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/div><!-- [ \/.vk_post_imgOuter ] --><div class=\"vk_post_body card-body\"><h5 class=\"vk_post_title card-title\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/msa400\/msa438.html\">Handheld Spectrum Analyzer MSA438<\/a><\/h5><p class=\"vk_post_excerpt card-text\">The most popular model in MSA 400 series.<br \/>\r\nMeasurement frequency : 50kHz to 3.3GHz <\/p><\/div><!-- [ \/.card-body ] --><\/div><!-- [ \/.card ] -->\n\n<div id=\"post-5808\" class=\"vk_post vk_post-postType-product card card-noborder vk_post-col-xs-12 vk_post-col-sm-6 vk_post-col-md-3 vk_post-col-lg-3 vk_post-col-xl-3 vk_post-col-xxl-3 post-2234 post type-post status-publish format-standard has-post-thumbnail hentry category-category-note tag-market-broadcasting tag-application-spectrum-analyzer\"><div class=\"vk_post_imgOuter\" style=\"background-image:url(https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MB400_620x620.png)\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/option\/mb400.html\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MB400_620x620-300x300.png\" class=\"vk_post_imgOuter_img card-img-top wp-post-image\" alt=\"\" srcset=\"https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MB400_620x620-300x300.png 300w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MB400_620x620-150x150.png 150w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MB400_620x620-100x100.png 100w, https:\/\/micronix-jp.com\/english\/wp-content\/uploads\/sites\/2\/2023\/03\/MB400_620x620.png 620w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/div><!-- [ \/.vk_post_imgOuter ] --><div class=\"vk_post_body card-body\"><h5 class=\"vk_post_title card-title\"><a href=\"https:\/\/micronix-jp.com\/english\/products\/spectrum-analyzer\/option\/mb400.html\">Lithium-ion Battery MB400<\/a><\/h5><p class=\"vk_post_excerpt card-text\">Product Description 7.4V\/5000mAh7.4V\/5000mAh Applied model MSA400\/500 Series<\/p><\/div><!-- [ \/.card-body ] --><\/div><!-- [ \/.card ] --><\/div><div class=\"wp-block-vk-blocks-button vk_button vk_button-color-custom vk_button-e7f610c2-998c-4196-9bb4-a0c2483fb76d vk_button-align-block\"><a href=\"\/eng\/file-download\/application\/pdf\/CN_measurement.pdf\" class=\"vk_button_link btn has-background btn-lg btn-block\" role=\"button\" aria-pressed=\"true\" target=\"_blank\" rel=\"noopener\"><div class=\"vk_button_link_caption\"><i class=\"fas fa-file-pdf vk_button_link_before\" aria-hidden=\"true\"><\/i><span class=\"vk_button_link_txt\">Download This Application Note (PDF)<\/span><\/div><\/a><\/div><style 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class=\"row\"><div class=\"wp-block-vk-blocks-grid-column-item vk_gridColumn_item col-12 col-sm-12 col-md-12 col-lg-12 col-xl-12 col-xxl-12\"><div class=\"wp-block-vk-blocks-button vk_button vk_button-color-custom vk_button-align-block is-style-shine\"><a href=\"https:\/\/micronix-jp.com\/english\/contact\/\" class=\"vk_button_link btn has-background has-luminous-vivid-orange-background-color btn-lg btn-block\" role=\"button\" aria-pressed=\"true\" target=\"_blank\" rel=\"noopener\"><div class=\"vk_button_link_caption\"><i class=\"far fa-envelope vk_button_link_before\" aria-hidden=\"true\"><\/i><span class=\"vk_button_link_txt\"><strong>Contact Form<\/strong><\/span><\/div><\/a><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Handheld spectrum analyzer enables easy C\/N ratio measurement. Judgement of stable receiving of such as digital broadcasting is made easy.Application In communication by digital modulation such as digital broadcasting, the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6425,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"sns_share_botton_hide":"","vkExUnit_sns_title":"","_vk_print_noindex":"","sitemap_hide":"","_veu_custom_css":"<!--\u8a18\u4e8b\u306e\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1\u3092\u6d88\u3059-->\r\n.veu_autoEyeCatchBox{\r\ndisplay:none;\r\n}","veu_display_promotion_alert":"","vkexunit_cta_each_option":"","_lightning_design_setting":{"layout":"default","header_trans":"default","section_base":"default"},"header_top_description":"","footnotes":""},"categories":[17],"tags":[64,75],"class_list":["post-2234","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-category-note","tag-market-broadcasting","tag-application-spectrum-analyzer"],"veu_head_title_object":{"title":"","add_site_title":""},"_links":{"self":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2234","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/comments?post=2234"}],"version-history":[{"count":8,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2234\/revisions"}],"predecessor-version":[{"id":9630,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/posts\/2234\/revisions\/9630"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media\/6425"}],"wp:attachment":[{"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/media?parent=2234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/categories?post=2234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/micronix-jp.com\/english\/wp-json\/wp\/v2\/tags?post=2234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}