{"id":4652,"date":"2015-10-23T16:26:19","date_gmt":"2015-10-23T09:26:19","guid":{"rendered":"http:\/\/snt.com.vn\/blog\/?p=4652"},"modified":"2017-05-09T13:49:28","modified_gmt":"2017-05-09T06:49:28","slug":"s%c6%a1-l%c6%b0%e1%bb%a3c-cac-thong-s%e1%bb%91-cung-nh%c6%b0-cac-d%c6%a1n-v%e1%bb%8b-do-l%c6%b0%e1%bb%9dng-trong-tin-hi%e1%bb%87u-truy%e1%bb%81n-hinh","status":"publish","type":"post","link":"https:\/\/snt.com.vn\/blog\/s%c6%a1-l%c6%b0%e1%bb%a3c-cac-thong-s%e1%bb%91-cung-nh%c6%b0-cac-d%c6%a1n-v%e1%bb%8b-do-l%c6%b0%e1%bb%9dng-trong-tin-hi%e1%bb%87u-truy%e1%bb%81n-hinh\/","title":{"rendered":"S\u01a1 l\u01b0\u1ee3c c\u00e1c th\u00f4ng s\u1ed1 c\u0169ng nh\u01b0 c\u00e1c \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng trong t\u00edn hi\u1ec7u truy\u1ec1n h\u00ecnh."},"content":{"rendered":"<p>\n\t<span style=\"font-size: medium;\"><strong>1<\/strong>. Mer (Modulation Error Ratio) l&agrave; t\u1ef7 l\u1ec7 l\u1ed7i \u0111i\u1ec1u ch\u1ebf.<\/span>\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\">C&ocirc;ng th\u1ee9c t&iacute;nh:<\/span>\n<\/p>\n<p>\n\t<a href=\"http:\/\/snt.com.vn\/blog\/wp-content\/uploads\/2015\/10\/mer.jpg\"><span style=\"font-size: medium;\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"56\" src=\"http:\/\/snt.com.vn\/blog\/wp-content\/uploads\/2015\/10\/mer.jpg\" title=\"mer\" width=\"265\" \/><\/span><\/a>\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\">C&aacute;c chu\u1ea9n ki\u1ec3m ch\u1ee9ng tr&ecirc;n m&aacute;y \u0111o chuy&ecirc;n d\u1ee5ng:<\/span>\n<\/p>\n<ul>\n<li>\n\t\t<span style=\"font-size: medium;\">MER &gt; 20 dB v\u1edbi \u0111i\u1ec1u ch\u1ebf 16 QAM.<\/span>\n\t<\/li>\n<li>\n\t\t<span style=\"font-size: medium;\">MER &gt; 26 dB v\u1edbi \u0111i\u1ec1u ch\u1ebf 64 QAM.<\/span>\n\t<\/li>\n<li>\n\t\t<span style=\"font-size: medium;\">MER &gt; 32 dB v\u1edbi \u0111i\u1ec1u ch\u1ebf 256 QAM.<\/span>\n\t<\/li>\n<\/ul>\n<p>\n\t<span style=\"font-size: medium;\"><strong>2<\/strong>. BER (Bit Error Rate) l&agrave; t\u1ef7 l\u1ec7 bit l\u1ed7i \/ t\u1ed7ng s\u1ed1 bit truy\u1ec1n \u0111i.<\/span>\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\">Th&ocirc;ng s\u1ed1 BER \u0111\u1ea1t chu\u1ea9n cho t&iacute;n hi\u1ec7u \u1ed5n \u0111\u1ecbnh l&agrave; BER &lt; 10<sup>-4<\/sup>.<\/span>\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\"><strong>3<\/strong>.&nbsp;C&aacute;c \u0111\u01a1n v\u1ecb trong \u0111o l\u01b0\u1eddng t&iacute;n hi\u1ec7u truy\u1ec1n h&igrave;nh.<\/span>\n<\/p>\n<ul>\n<li>\n\t\t<span style=\"font-size: medium;\">dBmV = 46.9897 + dBm<\/span><sub>50&Omega;<\/sub>\n\t<\/li>\n<li>\n\t\t<span style=\"font-size: medium;\">dBmV = 48.7506 + dBm<\/span><sub>75&Omega;<\/sub>\n\t<\/li>\n<li>\n\t\t<span style=\"font-size: medium;\">dB&micro;V = 60 + dBmV<\/span>\n\t<\/li>\n<li>\n\t\t<span style=\"font-size: medium;\">dB&micro;V = 106.98 + dBm<\/span><sub>50&Omega;<\/sub>\n\t<\/li>\n<li>\n\t\t<span style=\"font-size: medium;\">dB&micro;V = 108.75 + dBm<\/span><sub>75&Omega;<\/sub>\n\t<\/li>\n<\/ul>\n<p>\n\t<span style=\"font-size: medium;\">\u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng t&iacute;n hi\u1ec7u truy\u1ec1n h&igrave;nh hi\u1ec7n nay h\u1ea7u h\u1ebft dung dBmv v&agrave; dB&micro;V.<\/span>\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\">\u0110\u01a1n v\u1ecb dBmV \u0111\u01b0\u1ee3c tham chi\u1ebfu \u0111\u1ebfn 1mV<\/span>\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\"><a href=\"http:\/\/snt.com.vn\/blog\/wp-content\/uploads\/2015\/10\/dbmv.jpeg\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" class=\"alignleft size-full wp-image-4655\" height=\"57\" src=\"http:\/\/snt.com.vn\/blog\/wp-content\/uploads\/2015\/10\/dbmv.jpeg\" title=\"dbmv\" width=\"214\" \/><\/a><\/span>\n<\/p>\n<p>\n\t&nbsp;\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\">\u0110\u01a1n v\u1ecb dB&micro;V \u0111\u01b0\u1ee3c tham chi\u1ebfu \u0111\u1ebfn 1&mu;V<\/span>\n<\/p>\n<p>\n\t<a href=\"http:\/\/snt.com.vn\/blog\/wp-content\/uploads\/2015\/10\/dbuv.jpeg\"><span style=\"font-size: medium;\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" class=\"alignleft size-full wp-image-4656\" height=\"47\" src=\"http:\/\/snt.com.vn\/blog\/wp-content\/uploads\/2015\/10\/dbuv.jpeg\" title=\"dbuv\" width=\"214\" \/><\/span><\/a>\n<\/p>\n<p>\n\t&nbsp;\n<\/p>\n<p>\n\t&nbsp;\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\">C&ocirc;ng th\u1ee9c chuy\u1ec3n \u0111\u1ed5i \u0111\u01a1n v\u1ecb dB&micro;V sang \u0111\u01a1n v\u1ecb dBmV<\/span>\n<\/p>\n<p>\n\t<a href=\"http:\/\/snt.com.vn\/blog\/wp-content\/uploads\/2015\/10\/111.jpg\"><span style=\"font-size: medium;\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" class=\"alignleft size-full wp-image-4657\" height=\"52\" src=\"http:\/\/snt.com.vn\/blog\/wp-content\/uploads\/2015\/10\/111.jpg\" title=\"11\" width=\"311\" \/><\/span><\/a>\n<\/p>\n<p>\n\t&nbsp;\n<\/p>\n<p>\n\t&nbsp;\n<\/p>\n<p>\n\t<span style=\"font-size: medium;\">dB&micro;V = 60 + dBmV<\/span>\n<\/p>\n<p>\n\t&nbsp;\n<\/p>\n<ul>\n<\/ul>\n<p>\n\t&nbsp;\n<\/p>\n<ul>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1. Mer (Modulation Error Ratio) l&agrave; t\u1ef7 l\u1ec7 l\u1ed7i \u0111i\u1ec1u ch\u1ebf. C&ocirc;ng th\u1ee9c t&iacute;nh: C&aacute;c chu\u1ea9n ki\u1ec3m ch\u1ee9ng tr&ecirc;n m&aacute;y<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,81],"tags":[389,390],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.2.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>S\u01a1 l\u01b0\u1ee3c c\u00e1c th\u00f4ng s\u1ed1 c\u0169ng nh\u01b0 c\u00e1c \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng trong t\u00edn hi\u1ec7u truy\u1ec1n h\u00ecnh. - Blog SNT - C\u00f4ng Ty TNHH Si\u00eau Nh\u1eadt Thanh - Sao Nhanh Th\u1ebf<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/snt.com.vn\/blog\/s\u01a1-l\u01b0\u1ee3c-cac-thong-s\u1ed1-cung-nh\u01b0-cac-d\u01a1n-v\u1ecb-do-l\u01b0\u1eddng-trong-tin-hi\u1ec7u-truy\u1ec1n-hinh\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"S\u01a1 l\u01b0\u1ee3c c\u00e1c th\u00f4ng s\u1ed1 c\u0169ng nh\u01b0 c\u00e1c \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng trong t\u00edn hi\u1ec7u truy\u1ec1n h\u00ecnh. - Blog SNT - C\u00f4ng Ty TNHH Si\u00eau Nh\u1eadt Thanh - Sao Nhanh Th\u1ebf\" \/>\n<meta property=\"og:description\" content=\"1. 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Mer (Modulation Error Ratio) l&agrave; t\u1ef7 l\u1ec7 l\u1ed7i \u0111i\u1ec1u ch\u1ebf. 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