{"id":2596,"date":"2026-04-03T00:00:00","date_gmt":"2026-04-03T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/optical-line-terminals-olts-architecture-guide\/"},"modified":"2026-06-22T03:38:21","modified_gmt":"2026-06-22T03:38:21","slug":"optical-line-terminals-olts-architecture-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/optical-line-terminals-olts-architecture-guide","title":{"rendered":"M\u00e1y ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1 (DCA) trong ki\u1ec3m tra quang"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"536\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7f24781b19742dc9ed954beff079508-1024x536.jpg\" alt=\"Digital Communication Analyzer (DCA) in Optical Testing\" class=\"wp-image-2583\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7f24781b19742dc9ed954beff079508-1024x536.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7f24781b19742dc9ed954beff079508-300x157.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7f24781b19742dc9ed954beff079508-768x402.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7f24781b19742dc9ed954beff079508-18x9.jpg 18w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b7f24781b19742dc9ed954beff079508.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao hi\u1ec7n \u0111\u1ea1i\u2014t\u1eeb trung t\u00e2m d\u1eef li\u1ec7u \u0111\u00e1m m\u00e2y \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng vi\u1ec5n th\u00f4ng s\u1ee3i quang\u2014t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh. Ngay c\u1ea3 s\u1ef1 m\u00e9o nh\u1ecf nh\u1ea5t trong t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u1ed7i d\u1eef li\u1ec7u, gi\u1ea3m kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn ho\u1eb7c th\u1eadm ch\u00ed l\u00e0m gi\u00e1n \u0111o\u1ea1n ho\u00e0n to\u00e0n k\u1ebft n\u1ed1i. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac m\u1ed9t <strong>M\u00e1y ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1 (DCA)<\/strong> tr\u1edf n\u00ean thi\u1ebft y\u1ebfu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e1y ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1 (DCA) l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ki\u1ec3m tra \u0111\u1ed9 ch\u00ednh x\u00e1c cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n t\u00edch ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 quang h\u1ecdc t\u1ed1c \u0111\u1ed9 cao, gi\u00fap k\u1ef9 s\u01b0 h\u00ecnh dung hi\u1ec7u n\u0103ng th\u00f4ng qua bi\u1ec3u \u0111\u1ed3 m\u1eaft, \u0111o l\u01b0\u1eddng <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/how-to-reduce-jitter-in-optical-networks-for-stability\/\">\u0111\u1ed9 gi\u1eadt (jitter)<\/a>, v\u00e0 x\u00e1c minh s\u1ef1 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p. Kh\u00e1c v\u1edbi c\u00e1c m\u00e1y hi\u1ec7n s\u00f3ng \u0111a d\u1ee5ng, DCA \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng \u0111a gigabit, do \u0111\u00f3 tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 then ch\u1ed1t trong ph\u00e1t tri\u1ec3n v\u00e0 x\u00e1c th\u1ef1c module quang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 Ethernet 10G, 25G, 100G v\u00e0 th\u1eadm ch\u00ed 400G ti\u1ebfp t\u1ee5c m\u1edf r\u1ed9ng quy m\u00f4, vi\u1ec7c \u0111\u1ea3m b\u1ea3o vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u s\u1ea1ch v\u00e0 \u0111\u00e1ng tin c\u1eady ng\u00e0y c\u00e0ng tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p. <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">B\u1ed9 thu ph\u00e1t quang<\/a> nh\u01b0 <a target=\"_self\" href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\">SFP<\/a> and <a target=\"_self\" href=\"https:\/\/www.l-p.com\/products\/491483.htm\">C\u00e1c module QSFP<\/a> ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u hi\u1ec7u n\u0103ng nghi\u00eam ng\u1eb7t\u2014v\u00e0 vi\u1ec7c ki\u1ec3m tra b\u1eb1ng DCA \u0111\u00f3ng vai tr\u00f2 trung t\u00e2m trong vi\u1ec7c x\u00e1c nh\u1eadn \u0111i\u1ec1u n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nh\u1eefng n\u1ed9i dung b\u1ea1n s\u1ebd t\u00ecm hi\u1ec3u trong b\u00e0i vi\u1ebft n\u00e0y<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch \u0111\u1ecdc h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n s\u1ebd:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Hi\u1ec3u \u0111\u01b0\u1ee3c m\u00e1y ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1 (DCA) l\u00e0 g\u00ec v\u00e0 ho\u1ea1t \u0111\u1ed9ng ra sao<\/p><\/li>\n\n\n\n<li><p>T\u00ecm hi\u1ec3u c\u00e1ch DCA \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng quang<\/p><\/li>\n\n\n\n<li><p>Kh\u00e1m ph\u00e1 c\u00e1c ph\u00e9p \u0111o c\u1ed1t l\u00f5i nh\u01b0 bi\u1ec3u \u0111\u1ed3 m\u1eaft, nhi\u1ec5u th\u1eddi gian (jitter) v\u00e0 t\u1ef7 s\u1ed1 t\u1eaft\/m\u1edf (extinction ratio)<\/p><\/li>\n\n\n\n<li><p>Kh\u00e1m ph\u00e1 l\u00fd do v\u00ec sao vi\u1ec7c ki\u1ec3m tra b\u1eb1ng DCA \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn <a href=\"https:\/\/www.l-p.com\/products\/476862.htm\" target=\"_self\">m\u00f4-\u0111un quang<\/a> hi\u1ec7u n\u0103ng v\u00e0 \u0111\u1ed9 tin c\u1eady<\/p><\/li>\n\n\n\n<li><p>Xem c\u00e1ch c\u00e1c k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng k\u1ebft qu\u1ea3 ki\u1ec3m tra DCA \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00f9 b\u1ea1n l\u00e0 k\u1ef9 s\u01b0 m\u1ea1ng, nh\u00e0 thi\u1ebft k\u1ebf ph\u1ea7n c\u1ee9ng hay ng\u01b0\u1eddi mua \u0111ang \u0111\u00e1nh gi\u00e1 c\u00e1c module quang, vi\u1ec7c hi\u1ec3u r\u00f5 vai tr\u00f2 c\u1ee7a DCA s\u1ebd gi\u00fap b\u1ea1n \u0111\u01b0a ra nh\u1eefng quy\u1ebft \u0111\u1ecbnh k\u1ef9 thu\u1eadt v\u00e0 mua s\u1eafm t\u1ed1t h\u01a1n trong c\u00e1c m\u00f4i tr\u01b0\u1eddng truy\u1ec1n th\u00f4ng t\u1ed1c \u0111\u1ed9 cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 M\u00e1y ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1 (DCA) l\u00e0 g\u00ec?<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b5f311443f96483fbffe54b214980860.jpg\" alt=\"What Is a Digital Communication Analyzer (DCA)?\" class=\"wp-image-2584\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b5f311443f96483fbffe54b214980860.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b5f311443f96483fbffe54b214980860-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b5f311443f96483fbffe54b214980860-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b5f311443f96483fbffe54b214980860-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/b5f311443f96483fbffe54b214980860-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e1y ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1 (DCA) l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ki\u1ec3m tra \u0111\u1ed9 ch\u00ednh x\u00e1c cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 <strong>\u0111o l\u01b0\u1eddng, h\u00ecnh dung v\u00e0 ph\u00e2n t\u00edch t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 quang h\u1ecdc t\u1ed1c \u0111\u1ed9 cao<\/strong>. Thi\u1ebft b\u1ecb n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 t\u1ea1o bi\u1ec3u \u0111\u1ed3 m\u1eaft, \u0111\u00e1nh gi\u00e1 nhi\u1ec5u th\u1eddi gian (jitter) v\u00e0 x\u00e1c minh t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng \u0111a gigabit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1ec1 c\u01a1 b\u1ea3n, m\u1ed9t DCA cho ph\u00e9p k\u1ef9 s\u01b0 quan s\u00e1t m\u1ee9c \u0111\u1ed9 \u201cs\u1ea1ch\u201d v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1 theo th\u1eddi gian. V\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, thi\u1ebft b\u1ecb n\u00e0y ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1c k\u1ef9 thu\u1eadt l\u1ea5y m\u1eabu ti\u00ean ti\u1ebfn \u0111\u1ec3 t\u00e1i t\u1ea1o c\u00e1c d\u1ea1ng s\u00f3ng si\u00eau nhanh m\u00e0 kh\u00f4ng th\u1ec3 b\u1eaft tr\u1ef1c ti\u1ebfp theo th\u1eddi gian th\u1ef1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i\u2014\u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng c\u00e1p quang\u2014DCA \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c x\u00e1c th\u1ef1c hi\u1ec7u n\u0103ng c\u1ee7a c\u00e1c b\u1ed9 thu ph\u00e1t quang (v\u00ed d\u1ee5 nh\u01b0 module SFP v\u00e0 QSFP) v\u00e0 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a B\u1ed9 ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DCA ho\u1ea1t \u0111\u1ed9ng kh\u00e1c v\u1edbi c\u00e1c m\u00e1y hi\u1ec7n s\u00f3ng truy\u1ec1n th\u1ed1ng nh\u1edd s\u1eed d\u1ee5ng k\u1ef9 thu\u1eadt l\u1ea5y m\u1eabu t\u01b0\u01a1ng \u0111\u01b0\u01a1ng th\u1eddi gian\u2014a ph\u01b0\u01a1ng ph\u00e1p t\u00e1i t\u1ea1o t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 cao qua nhi\u1ec1u chu k\u1ef3.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/496f7d0b316a4538940861da0d1b832a.jpg\" alt=\"How a Digital Communication Analyzer Works\" class=\"wp-image-2585\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/496f7d0b316a4538940861da0d1b832a.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/496f7d0b316a4538940861da0d1b832a-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/496f7d0b316a4538940861da0d1b832a-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/496f7d0b316a4538940861da0d1b832a-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/496f7d0b316a4538940861da0d1b832a-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 L\u1ea5y m\u1eabu t\u01b0\u01a1ng \u0111\u01b0\u01a1ng th\u1eddi gian<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Thay v\u00ec b\u1eaft to\u00e0n b\u1ed9 d\u1ea1ng s\u00f3ng trong m\u1ed9t l\u1ea7n duy nh\u1ea5t, DCA:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>L\u1ea5y m\u1eabu t\u1eebng ph\u1ea7n nh\u1ecf c\u1ee7a t\u00edn hi\u1ec7u l\u1eb7p l\u1ea1i<\/p><\/li>\n\n\n\n<li><p>T\u00e1i t\u1ea1o d\u1ea1ng s\u00f3ng theo th\u1eddi gian<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea1t \u0111\u01b0\u1ee3c d\u1ea3i th\u00f4ng hi\u1ec7u d\u1ee5ng c\u1ef1c cao (v\u01b0\u1ee3t xa kh\u1ea3 n\u0103ng c\u1ee7a c\u00e1c m\u00e1y hi\u1ec7n s\u00f3ng th\u1eddi gian th\u1ef1c)<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 T\u00e1i t\u1ea1o t\u00edn hi\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p h\u00e0ng ng\u00e0n (ho\u1eb7c h\u00e0ng tri\u1ec7u) \u0111i\u1ec3m l\u1ea5y m\u1eabu:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>DCA x\u00e2y d\u1ef1ng bi\u1ec3u di\u1ec5n th\u1ed1ng k\u00ea c\u1ee7a t\u00edn hi\u1ec7u<\/p><\/li>\n\n\n\n<li><p>Nh\u1edd \u0111\u00f3 c\u00f3 th\u1ec3 tr\u1ef1c quan h\u00f3a ch\u00ednh x\u00e1c \u0111\u1ed9 m\u00e9o pha (jitter), nhi\u1ec5u v\u00e0 m\u00e9o d\u1ea1ng s\u00f3ng<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 \u0110\u1ea7u v\u00e0o \u0111i\u1ec7n v\u00e0 quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c DCA hi\u1ec7n \u0111\u1ea1i h\u1ed7 tr\u1ee3 c\u1ea3 hai lo\u1ea1i:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/476770.htm\" target=\"_self\"><strong>Module \u0111i\u1ec7n<\/strong><\/a> \u2192 d\u00e0nh cho ki\u1ec3m tra b\u1ea3ng m\u1ea1ch in t\u1ed1c \u0111\u1ed9 cao v\u00e0 <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/serdes-interfaces-high-speed-data-transfer-and-signal-integrity\/\" target=\"_blank\" rel=\"\">SerDes<\/a> t\u00edn hi\u1ec7u<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/products\/478230.htm\" target=\"_self\"><strong>M\u00f4-\u0111un quang<\/strong><\/a> \u2192 d\u00e0nh cho ki\u1ec3m tra truy\u1ec1n th\u00f4ng quang<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ea7u l\u1ea5y m\u1eabu quang chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u \u00e1nh s\u00e1ng th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n \u0111\u1ec3 ph\u00e2n t\u00edch, cho ph\u00e9p ki\u1ec3m tra tr\u1ef1c ti\u1ebfp b\u1ed9 ph\u00e1t quang.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 C\u00e1c ph\u00e9p \u0111o ch\u00ednh do DCA th\u1ef1c hi\u1ec7n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">DCA cung c\u1ea5p c\u00e1i nh\u00ecn s\u00e2u s\u1eafc v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u th\u00f4ng qua m\u1ed9t s\u1ed1 ph\u00e9p \u0111o then ch\u1ed1t:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1db88db4f7cb4e898902b1b5e4efc1ed.jpg\" alt=\"Key Measurements Performed by a DCA\" class=\"wp-image-2586\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1db88db4f7cb4e898902b1b5e4efc1ed.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1db88db4f7cb4e898902b1b5e4efc1ed-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1db88db4f7cb4e898902b1b5e4efc1ed-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1db88db4f7cb4e898902b1b5e4efc1ed-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/1db88db4f7cb4e898902b1b5e4efc1ed-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u00e2n t\u00edch bi\u1ec3u \u0111\u1ed3 m\u1eaft (Eye Diagram)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Gh\u00e9p ch\u1ed3ng nhi\u1ec1u bit \u0111\u1ec3 t\u1ea1o th\u00e0nh h\u00ecnh \u1ea3nh tr\u1ef1c quan d\u1ea1ng \u201cm\u1eaft\u201d<\/p><\/li>\n\n\n\n<li><p>\u0110\u00e1nh gi\u00e1 \u0111\u1ed9 r\u00f5 n\u00e9t c\u1ee7a t\u00edn hi\u1ec7u v\u00e0 bi\u00ean d\u1ef1 ph\u00f2ng nhi\u1ec5u<\/p><\/li>\n\n\n\n<li><p>Nh\u1eadn di\u1ec7n m\u00e9o d\u1ea1ng s\u00f3ng, nhi\u1ec5u v\u00e0 v\u1ea5n \u0111\u1ec1 v\u1ec1 th\u1eddi gian<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110o \u0111\u1ed9 m\u00e9o pha (Jitter) (RJ, DJ, TJ)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ed9 m\u00e9o pha ng\u1eabu nhi\u00ean (RJ):<\/strong> li\u00ean quan \u0111\u1ebfn nhi\u1ec5u, kh\u00f4ng th\u1ec3 d\u1ef1 \u0111o\u00e1n<\/p><\/li>\n\n\n\n<li><p><strong>\u0110\u1ed9 m\u00e9o pha x\u00e1c \u0111\u1ecbnh (DJ):<\/strong> do c\u00e1c hi\u1ec7u \u1ee9ng h\u1ec7 th\u1ed1ng g\u00e2y ra (v\u00ed d\u1ee5 nh\u01b0, <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/crosstalk-definition-causes-types-effects\/\" target=\"_blank\" rel=\"\">nhi\u1ec5u xuy\u00ean k\u00eanh<\/a>)<\/p><\/li>\n\n\n\n<li><p><strong>\u0110\u1ed9 m\u00e9o pha t\u1ed5ng (TJ):<\/strong> t\u00e1c \u0111\u1ed9ng t\u1ed5ng h\u1ee3p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 m\u00e9o pha qu\u00e1 m\u1ee9c c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u1ed7i bit v\u00e0 m\u1ea5t \u1ed5n \u0111\u1ecbnh li\u00ean k\u1ebft<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ef7 s\u1ed1 t\u1eaft m\u1edf (Extinction Ratio) v\u00e0 OMA<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/extinction-ratio-importance-signal-quality-data-reliability\/\" target=\"_blank\" rel=\"\"><strong>T\u1ef7 s\u1ed1 t\u1eaft m\u1edf<\/strong><\/a><strong> (ER):<\/strong> ch\u00eanh l\u1ec7ch gi\u1eefa c\u00f4ng su\u1ea5t quang \u1edf m\u1ee9c logic \u201c1\u201d v\u00e0 \u201c0\u201d<\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/optical-modulation-amplitude-oma-in-sfp-modules\/\" target=\"_blank\" rel=\"\"><strong>Bi\u00ean \u0111\u1ed9 \u0111i\u1ec1u ch\u1ebf quang h\u1ecdc<\/strong><\/a><strong> (OMA):<br><\/strong> c\u01b0\u1eddng \u0111\u1ed9 t\u00edn hi\u1ec7u hi\u1ec7u d\u1ee5ng<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 nh\u1ea1y b\u1ed9 thu v\u00e0 kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Th\u1eddi gian t\u0103ng v\u00e0 th\u1eddi gian gi\u1ea3m<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110o l\u01b0\u1eddng t\u1ed1c \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u00edn hi\u1ec7u gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i<\/p><\/li>\n\n\n\n<li><p>Chuy\u1ec3n \u0111\u1ed5i ch\u1eadm \u2192 t\u0103ng l\u00ean <a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/intersymbol-interference-isi-in-digital-communication-explained\/\" target=\"_blank\" rel=\"\">nhi\u1ec5u gi\u1eefa c\u00e1c k\u00fd hi\u1ec7u<\/a> (ISI)<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 V\u00ec sao bi\u1ec3u \u0111\u1ed3 m\u1eaft quan tr\u1ecdng trong th\u00f4ng tin quang<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bi\u1ec3u \u0111\u1ed3 m\u1eaft l\u00e0 m\u1ed9t trong nh\u1eefng \u0111\u1ea7u ra quan tr\u1ecdng nh\u1ea5t c\u1ee7a DCA v\u00ec ch\u00fang cung c\u1ea5p b\u1ea3n t\u00f3m t\u1eaft tr\u1ef1c quan v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/837c770c042c46148f1c926c94640ac8.jpg\" alt=\"Why Eye Diagrams Matter in Optical Communication\" class=\"wp-image-2587\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/837c770c042c46148f1c926c94640ac8.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/837c770c042c46148f1c926c94640ac8-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/837c770c042c46148f1c926c94640ac8-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/837c770c042c46148f1c926c94640ac8-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/837c770c042c46148f1c926c94640ac8-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Tr\u1ef1c quan h\u00f3a t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t \u201cm\u1eaft\u201d m\u1edf r\u1ed9ng cho th\u1ea5y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Nhi\u1ec5u th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed3ng b\u1ed9 th\u1eddi gian \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n\n\n\n<li><p>Ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u m\u1ea1nh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t \u201cm\u1eaft\u201d b\u1ecb kh\u00e9p l\u1ea1i cho th\u1ea5y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u00e9o d\u1ea1ng<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ed9 m\u00e9o th\u1eddi gian (jitter)<\/p><\/li>\n\n\n\n<li><p>Kh\u1ea3 n\u0103ng x\u1ea3y ra l\u1ed7i d\u1eef li\u1ec7u<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">M\u1ed1i quan h\u1ec7 v\u1edbi <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/understanding-what-is-bit-error-rate\/\">T\u1ef7 l\u1ec7 l\u1ed7i bit<\/a> (BER)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1ed9t bi\u1ec3u \u0111\u1ed3 m\u1eaft s\u1ea1ch h\u01a1n \u2192 x\u00e1c su\u1ea5t l\u1ed7i bit th\u1ea5p h\u01a1n<\/p><\/li>\n\n\n\n<li><p>M\u1ed9t bi\u1ec3u \u0111\u1ed3 m\u1eaft suy gi\u1ea3m \u2192 t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) cao h\u01a1n<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Bi\u1ec3u \u0111\u1ed3 m\u1eaft cho ph\u00e9p k\u1ef9 s\u01b0 d\u1ef1 \u0111o\u00e1n \u0111\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng m\u00e0 kh\u00f4ng c\u1ea7n th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m tra BER k\u00e9o d\u00e0i<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m tra s\u1ef1 tu\u00e2n th\u1ee7 chu\u1ea9n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ti\u00eau chu\u1ea9n do c\u00e1c t\u1ed5 ch\u1ee9c nh\u01b0 IEEE quy \u0111\u1ecbnh bao g\u1ed3m c\u00e1c m\u1eb7t n\u1ea1 bi\u1ec3u \u0111\u1ed3 m\u1eaft.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00edn hi\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qua c\u00e1c v\u00f9ng b\u1ecb c\u1ea5m<\/p><\/li>\n\n\n\n<li><p>DCA x\u00e1c minh vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c m\u1eb7t n\u1ea1 n\u00e0y<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 Vai tr\u00f2 c\u1ee7a DCA trong ki\u1ec3m tra module quang (SFP, QSFP, v.v.)<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a11d1473e67946cf85404d92799d5b69.jpg\" alt=\"Role of DCA in Optical Module Testing (SFP, QSFP, etc.)\" class=\"wp-image-2588\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a11d1473e67946cf85404d92799d5b69.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a11d1473e67946cf85404d92799d5b69-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a11d1473e67946cf85404d92799d5b69-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a11d1473e67946cf85404d92799d5b69-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a11d1473e67946cf85404d92799d5b69-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">DCA l\u00e0 c\u00f4ng c\u1ee5 c\u1ed1t l\u00f5i trong vi\u1ec7c x\u00e1c th\u1ef1c b\u1ed9 thu ph\u00e1t quang, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c module nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/www.l-p.com\/store-26155-1g-sfp.htm\" target=\"_self\">SFP 1G<\/a> \/ <a href=\"https:\/\/www.l-p.com\/store-26192-10g-sfp.htm\" target=\"_self\">SFP+ 10G<\/a><\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/store-26153-40g-qsfp.htm\" target=\"_self\">QSFP+ 40G<\/a> \/ <a href=\"https:\/\/www.l-p.com\/store-27045-100g-qsfp28-sfp-dd.htm\" target=\"_self\">100G QSFP28<\/a><\/p><\/li>\n\n\n\n<li><p><a href=\"https:\/\/www.l-p.com\/store-26224-200g-qsfp-dd-qsfp56.htm\" target=\"_self\">200G<\/a> \/ <a href=\"https:\/\/www.l-p.com\/store-26224-200g-qsfp-dd-qsfp56.htm\" target=\"_self\">Module quang 400G<\/a><\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m tra b\u1ed9 ph\u00e1t quang<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DCA \u0111o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ch\u1ea5t l\u01b0\u1ee3ng d\u1ea1ng s\u00f3ng quang<\/p><\/li>\n\n\n\n<li><p>\u0110\u1eb7c t\u00ednh \u0111i\u1ec1u ch\u1ebf<\/p><\/li>\n\n\n\n<li><p>Hi\u1ec7u su\u1ea5t \u0111\u1ed3ng b\u1ed9 th\u1eddi gian<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n IEEE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module quang ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\" target=\"_blank\" rel=\"\">IEEE 802.3<\/a> (Ethernet)<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">DCA x\u00e1c minh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1ef1 tu\u00e2n th\u1ee7 m\u1eb7t n\u1ea1 m\u1eaft<\/p><\/li>\n\n\n\n<li><p>Gi\u1edbi h\u1ea1n nhi\u1ec5u th\u1eddi gian (jitter)<\/p><\/li>\n\n\n\n<li><p>Bi\u00ean \u0111\u1ed9 t\u00edn hi\u1ec7u<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">X\u00e1c th\u1ef1c hi\u1ec7u su\u1ea5t trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi tri\u1ec3n khai, ki\u1ec3m tra b\u1eb1ng DCA \u0111\u1ea3m b\u1ea3o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c b\u1ed9 chuy\u1ec3n m\u1ea1ch v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/p><\/li>\n\n\n\n<li><p>Truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n\n\n\n<li><p>T\u1ef7 l\u1ec7 l\u1ed7i th\u1ea5p trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 Vai tr\u00f2 c\u1ee7a DCA \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t module quang<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c t\u1eeb DCA tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch m\u1ed9t module quang ho\u1ea1t \u0111\u1ed9ng trong c\u00e1c m\u1ea1ng th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f03d927630d748bb940a5cd092875b38.jpg\" alt=\"How DCA Impacts Optical Module Performance\" class=\"wp-image-2589\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f03d927630d748bb940a5cd092875b38.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f03d927630d748bb940a5cd092875b38-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f03d927630d748bb940a5cd092875b38-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f03d927630d748bb940a5cd092875b38-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/f03d927630d748bb940a5cd092875b38-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u \u2192 Kho\u1ea3ng c\u00e1ch truy\u1ec1n d\u1eabn<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00edn hi\u1ec7u m\u1ea1nh v\u00e0 s\u1ea1ch truy\u1ec1n \u0111i xa h\u01a1n<\/p><\/li>\n\n\n\n<li><p>Ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u k\u00e9m l\u00e0m gi\u1ea3m kho\u1ea3ng c\u00e1ch li\u00ean k\u1ebft hi\u1ec7u d\u1ee5ng<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Nhi\u1ec5u th\u1eddi gian (jitter) \u2192 L\u1ed7i m\u1ea1ng<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Jitter cao g\u00e2y ra l\u1ed7i l\u1ea5y m\u1eabu t\u1ea1i b\u1ed9 thu<\/p><\/li>\n\n\n\n<li><p>D\u1eabn \u0111\u1ebfn vi\u1ec7c truy\u1ec1n l\u1ea1i v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ed9 tr\u1ec5<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">S\u01a1 \u0111\u1ed3 m\u1eaft k\u00e9m \u2192 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-does-packet-loss-mean-for-your-internet-connection\/\">M\u1ea5t g\u00f3i<\/a><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>M\u1eaft \u0111\u00f3ng \u2192 t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) cao h\u01a1n<\/p><\/li>\n\n\n\n<li><p>G\u00e2y ra m\u1ea5t g\u00f3i tin v\u00e0 li\u00ean k\u1ebft kh\u00f4ng \u1ed5n \u0111\u1ecbnh<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi mua v\u00e0 k\u1ef9 s\u01b0, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0: C\u00e1c module \u0111\u00e3 qua ki\u1ec3m tra b\u1eb1ng DCA \u0111\u00e1ng tin c\u1eady v\u00e0 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c h\u01a1n khi tri\u1ec3n khai<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 So s\u00e1nh DCA \u2013 Dao \u0111\u1ed9ng k\u00fd \u2013 BERT: \u0110i\u1ec3m kh\u00e1c bi\u1ec7t l\u00e0 g\u00ec?<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5dd82abbdce94064ab56d5dc643060df.jpg\" alt=\"DCA vs. Oscilloscope vs. BERT: What\u2019s the Difference?\" class=\"wp-image-2590\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5dd82abbdce94064ab56d5dc643060df.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5dd82abbdce94064ab56d5dc643060df-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5dd82abbdce94064ab56d5dc643060df-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5dd82abbdce94064ab56d5dc643060df-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5dd82abbdce94064ab56d5dc643060df-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 180px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"180\"><p>C\u00f4ng c\u1ee5<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ch\u1ee9c n\u0103ng ch\u00ednh<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng t\u1ed1i \u01b0u<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"180\"><p>DCA<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ph\u00e2n t\u00edch t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>S\u01a1 \u0111\u1ed3 m\u1eaft, ki\u1ec3m tra quang<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"180\"><p>Dao \u0111\u1ed9ng k\u00fd<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ghi nh\u1eadn d\u1ea1ng s\u00f3ng t\u1ed5ng qu\u00e1t<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>G\u1ee1 l\u1ed7i m\u1ea1ch<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"180\"><p>BERT<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110o l\u1ed7i bit<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>X\u00e1c th\u1ef1c t\u1ef7 l\u1ec7 l\u1ed7i bit (BER)<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng t\u1eebng c\u00f4ng c\u1ee5<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u1eed d\u1ee5ng <strong>DCA<\/strong> \u2192 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u quang v\u00e0 m\u1ee9c \u0111\u1ed9 tu\u00e2n th\u1ee7<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng <strong>dao \u0111\u1ed9ng k\u00fd<\/strong> \u2192 \u0111\u1ec3 g\u1ee1 l\u1ed7i theo th\u1eddi gian th\u1ef1c<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng <strong>BERT<\/strong> \u2192 \u0111\u1ec3 ki\u1ec3m tra l\u1ed7i trong th\u1eddi gian d\u00e0i<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u00f4ng c\u1ee5 n\u00e0y b\u1ed5 tr\u1ee3 l\u1eabn nhau, ch\u1ee9 kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 Ti\u00eau chu\u1ea9n ng\u00e0nh v\u00e0 s\u1ef1 tu\u00e2n th\u1ee7 DCA<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ph\u00e9p \u0111o DCA l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 x\u00e1c minh m\u1ee9c \u0111\u1ed9 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh ch\u1ee7 ch\u1ed1t:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c5fb67e00a124f09a8b62c3eb6811468.jpg\" alt=\"Industry Standards and DCA Compliance\" class=\"wp-image-2591\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c5fb67e00a124f09a8b62c3eb6811468.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c5fb67e00a124f09a8b62c3eb6811468-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c5fb67e00a124f09a8b62c3eb6811468-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c5fb67e00a124f09a8b62c3eb6811468-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c5fb67e00a124f09a8b62c3eb6811468-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">IEEE 802.3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quy \u0111\u1ecbnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Y\u00eau c\u1ea7u v\u1ec1 t\u1ea7ng v\u1eadt l\u00fd Ethernet<\/p><\/li>\n\n\n\n<li><p>Th\u00f4ng s\u1ed1 t\u00edn hi\u1ec7u quang<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">MSA (<a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/multi-source-agreements-optical-transceivers\/\">Th\u1ecfa thu\u1eadn \u0110a ngu\u1ed3n<\/a>)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quy \u0111\u1ecbnh:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>T\u00ednh t\u01b0\u01a1ng th\u00edch c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n<\/p><\/li>\n\n\n\n<li><p>K\u1ef3 v\u1ecdng v\u1ec1 hi\u1ec7u su\u1ea5t quang<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ki\u1ec3m tra m\u1eb7t n\u1ea1 m\u1eaft<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Ti\u00eau ch\u00ed ch\u1ea5p nh\u1eadn\/th\u1ea5t b\u1ea1i \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a<\/p><\/li>\n\n\n\n<li><p>\u0110\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c nh\u00e0 cung c\u1ea5p<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu thi\u1ebfu x\u00e1c th\u1ef1c b\u1eb1ng DCA, c\u00e1c module c\u00f3 th\u1ec3 th\u1ea5t b\u1ea1i trong kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c tr\u00ean c\u00e1c m\u1ea1ng \u0111a nh\u00e0 cung c\u1ea5p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 Tr\u01b0\u1eddng h\u1ee3p \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf: Ki\u1ec3m tra module SFP b\u1eb1ng DCA<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/52f5df579bf94ddb84635b50069c3ff0.jpg\" alt=\"Practical Use Case: Testing an SFP Module with a DCA\" class=\"wp-image-2592\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/52f5df579bf94ddb84635b50069c3ff0.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/52f5df579bf94ddb84635b50069c3ff0-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/52f5df579bf94ddb84635b50069c3ff0-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/52f5df579bf94ddb84635b50069c3ff0-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/52f5df579bf94ddb84635b50069c3ff0-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Quy tr\u00ecnh t\u1eebng b\u01b0\u1edbc<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><p>K\u1ebft n\u1ed1i module SFP v\u00e0o h\u1ec7 th\u1ed1ng ki\u1ec3m tra<\/p><\/li>\n\n\n\n<li><p>\u0110\u01b0a m\u1ed9t m\u1eabu d\u1eef li\u1ec7u \u0111\u00e3 bi\u1ebft v\u00e0o b\u1ed9 ph\u00e1t<\/p><\/li>\n\n\n\n<li><p>S\u1eed d\u1ee5ng \u0111\u1ea7u d\u00f2 l\u1ea5y m\u1eabu quang tr\u00ean DCA<\/p><\/li>\n\n\n\n<li><p>Ghi nh\u1eadn v\u00e0 t\u1ea1o s\u01a1 \u0111\u1ed3 m\u1eaft<\/p><\/li>\n\n\n\n<li><p>\u0110o jitter, t\u1ef7 s\u1ed1 suy gi\u1ea3m (ER), bi\u00ean \u0111\u1ed9 \u0111i\u1ec1u ch\u1ebf quang (OMA), th\u1eddi gian t\u0103ng\/th\u1eddi gian gi\u1ea3m<\/p><\/li>\n\n\n\n<li><p>So s\u00e1nh k\u1ebft qu\u1ea3 v\u1edbi gi\u1edbi h\u1ea1n ti\u00eau chu\u1ea9n<\/p><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1eefng y\u1ebfu t\u1ed1 k\u1ef9 s\u01b0 quan t\u00e2m<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>\u0110\u1ed9 m\u1edf m\u1eaft (\u0111\u1ed9 r\u00f5 n\u00e9t t\u00edn hi\u1ec7u)<\/p><\/li>\n\n\n\n<li><p>Jitter n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p<\/p><\/li>\n\n\n\n<li><p>T\u1ef7 s\u1ed1 suy gi\u1ea3m (extinction ratio) ph\u00f9 h\u1ee3p<\/p><\/li>\n\n\n\n<li><p>C\u00e1c qu\u00e1 tr\u00ecnh chuy\u1ec3n ti\u1ebfp s\u1ea1ch<\/p><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1c d\u1ea5u hi\u1ec7u th\u1ea5t b\u1ea1i ph\u1ed5 bi\u1ebfn<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>S\u01a1 \u0111\u1ed3 m\u1eaft b\u1ecb \u0111\u00f3ng ho\u1eb7c bi\u1ebfn d\u1ea1ng<\/p><\/li>\n\n\n\n<li><p>Jitter qu\u00e1 m\u1ee9c<\/p><\/li>\n\n\n\n<li><p>OMA ho\u1eb7c t\u1ef7 s\u1ed1 suy gi\u1ea3m th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>Vi ph\u1ea1m m\u1eb7t n\u1ea1<\/p><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 B\u1ed9 ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng s\u1ed1 (DCA)<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d7397f1b541d4ebab7462a7497b49a78.jpg\" alt=\"FAQ About Digital Communication Analyzer (DCA)\" class=\"wp-image-2593\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d7397f1b541d4ebab7462a7497b49a78.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d7397f1b541d4ebab7462a7497b49a78-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d7397f1b541d4ebab7462a7497b49a78-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d7397f1b541d4ebab7462a7497b49a78-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/d7397f1b541d4ebab7462a7497b49a78-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">DCA \u0111o nh\u1eefng th\u00f4ng s\u1ed1 g\u00ec?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">DCA \u0111o <strong>C\u00e1c th\u00f4ng s\u1ed1 v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> nh\u01b0 s\u01a1 \u0111\u1ed3 m\u1eaft, jitter, t\u1ef7 s\u1ed1 suy gi\u1ea3m, bi\u00ean \u0111\u1ed9 \u0111i\u1ec1u ch\u1ebf quang (OMA) v\u00e0 \u0111\u1eb7c t\u00ednh \u0111\u1ed3ng b\u1ed9 th\u1eddi gian.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DCA c\u00f3 gi\u1ed1ng dao \u0111\u1ed9ng k\u00fd kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng. DCA s\u1eed d\u1ee5ng <strong>k\u1ef9 thu\u1eadt l\u1ea5y m\u1eabu t\u01b0\u01a1ng \u0111\u01b0\u01a1ng th\u1eddi gian<\/strong> \u0111\u1ec3 ph\u00e2n t\u00edch t\u1ed1c \u0111\u1ed9 cao, trong khi dao \u0111\u1ed9ng k\u00fd ghi nh\u1eadn t\u00edn hi\u1ec7u theo th\u1eddi gian th\u1ef1c nh\u1eb1m m\u1ee5c \u0111\u00edch g\u1ee1 l\u1ed7i t\u1ed5ng qu\u00e1t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">T\u1ea1i sao ki\u1ec3m tra s\u01a1 \u0111\u1ed3 m\u1eaft l\u1ea1i quan tr\u1ecdng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y bi\u1ec3u th\u1ecb tr\u1ef1c quan ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u v\u00e0 gi\u00fap d\u1ef1 \u0111o\u00e1n <strong>T\u1ef7 l\u1ec7 l\u1ed7i bit (BER)<\/strong> v\u00e0 \u0111\u1ed9 tin c\u1eady t\u1ed5ng th\u1ec3 c\u1ee7a li\u00ean k\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DCA c\u00f3 th\u1ec3 \u0111o t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) kh\u00f4ng?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng tr\u1ef1c ti\u1ebfp. DCA \u01b0\u1edbc l\u01b0\u1ee3ng ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u, trong khi BER \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng <strong>M\u00e1y ki\u1ec3m tra t\u1ef7 l\u1ec7 l\u1ed7i bit (BERT)<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u2705 K\u1ebft lu\u1eadn: V\u00ec sao DCA l\u1ea1i mang t\u00ednh then ch\u1ed1t trong m\u1ea1ng quang<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>M\u00e1y ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1 (DCA)<\/strong> l\u00e0 c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu nh\u1eb1m \u0111\u1ea3m b\u1ea3o <strong>hi\u1ec7u su\u1ea5t, \u0111\u1ed9 tin c\u1eady v\u00e0 m\u1ee9c \u0111\u1ed9 tu\u00e2n th\u1ee7 c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng quang t\u1ed1c \u0111\u1ed9 cao<\/strong>. Nh\u1edd cung c\u1ea5p c\u00e1i nh\u00ecn s\u00e2u s\u1eafc v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u\u2014th\u00f4ng qua s\u01a1 \u0111\u1ed3 m\u1eaft, ph\u00e2n t\u00edch jitter v\u00e0 c\u00e1c ph\u00e9p \u0111o quang\u2014DCA gi\u00fap k\u1ef9 s\u01b0 ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64da6bf93e29430a9517bbae918dc738.jpg\" alt=\"Why DCA Is Critical in Optical Networks\" class=\"wp-image-2594\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64da6bf93e29430a9517bbae918dc738.jpg 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64da6bf93e29430a9517bbae918dc738-300x169.jpg 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64da6bf93e29430a9517bbae918dc738-1024x576.jpg 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64da6bf93e29430a9517bbae918dc738-768x432.jpg 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/64da6bf93e29430a9517bbae918dc738-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c module quang nh\u01b0 SFP v\u00e0 QSFP, ki\u1ec3m tra b\u1eb1ng DCA kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ef1a ch\u1ecdn\u2014m\u00e0 l\u00e0 y\u00eau c\u1ea7u c\u01a1 b\u1ea3n \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh v\u00e0 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c trong c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi l\u1ef1a ch\u1ecdn b\u1ed9 thu ph\u00e1t quang, vi\u1ec7c ch\u1ecdn s\u1ea3n ph\u1ea9m \u0111\u00e3 tr\u1ea3i qua quy tr\u00ecnh x\u00e1c th\u1ef1c nghi\u00eam ng\u1eb7t b\u1eb1ng DCA s\u1ebd \u0111\u1ea3m b\u1ea3o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>Truy\u1ec1n d\u1eabn \u1ed5n \u0111\u1ecbnh \u1edf kho\u1ea3ng c\u00e1ch xa<\/p><\/li>\n\n\n\n<li><p>T\u1ef7 l\u1ec7 l\u1ed7i th\u1ea5p<\/p><\/li>\n\n\n\n<li><p>Hi\u1ec7u su\u1ea5t m\u1ea1ng \u0111\u00e1ng tin c\u1eady<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 Kh\u00e1m ph\u00e1 c\u00e1c module quang ch\u1ea5t l\u01b0\u1ee3ng cao, \u0111\u00e3 qua ki\u1ec3m tra DCA t\u1ea1i<strong> <\/strong><a target=\"_self\" href=\"https:\/\/www.l-p.com\/\"><strong>C\u1eeda h\u00e0ng Ch\u00ednh th\u1ee9c LINK-PP<\/strong><\/a> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ea1ng c\u1ee7a b\u1ea1n v\u1eadn h\u00e0nh v\u1edbi hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a v\u00e0 \u0111\u1ed9 tin c\u1eady cao nh\u1ea5t.<\/p>","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec3u r\u00f5 m\u00e1y ph\u00e2n t\u00edch truy\u1ec1n th\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1 (DCA) l\u00e0 g\u00ec, c\u00e1ch ho\u1ea1t \u0111\u1ed9ng v\u00e0 l\u00fd do thi\u1ebft y\u1ebfu trong ki\u1ec3m tra module quang, bi\u1ec3u \u0111\u1ed3 m\u1eaft (eye diagrams) v\u00e0 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u.<\/p>","protected":false},"author":1,"featured_media":2595,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[26],"class_list":["post-2596","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2596","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=2596"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2596\/revisions"}],"predecessor-version":[{"id":10714,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/2596\/revisions\/10714"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/2595"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=2596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=2596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=2596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}