{"id":4022,"date":"2025-07-11T00:00:00","date_gmt":"2025-07-11T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-is-pam4-four-level-pulse-amplitude-modulation-basics\/"},"modified":"2026-06-22T09:06:18","modified_gmt":"2026-06-22T09:06:18","slug":"what-is-pam4-four-level-pulse-amplitude-modulation-basics","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/ja\/glossary\/what-is-pam4-four-level-pulse-amplitude-modulation-basics","title":{"rendered":"PAM4\u306e\u4ed5\u7d44\u307f\u3092\u89e3\u8aac\uff1a4\u30ec\u30d9\u30eb\u30d1\u30eb\u30b9\u632f\u5e45\u5909\u8abf\uff08PAM4\uff09\u306e\u57fa\u790e\u77e5\u8b58"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5f408660b34441fcb684a16f0eac752d.webp\" alt=\"Four-Level Pulse Amplitude Modulation (PAM4)\" class=\"wp-image-4019\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5f408660b34441fcb684a16f0eac752d.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5f408660b34441fcb684a16f0eac752d-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5f408660b34441fcb684a16f0eac752d-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5f408660b34441fcb684a16f0eac752d-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/5f408660b34441fcb684a16f0eac752d-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">\u30af\u30e9\u30a6\u30c9\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3001AI\u30015G\u3001\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u306a\u3069\u306b\u3088\u3063\u3066\u5f8c\u62bc\u3057\u3055\u308c\u308b\u3001\u4e16\u754c\u4e2d\u306e\u30c7\u30fc\u30bf\u6d88\u8cbb\u91cf\u306e\u7d76\u3048\u9593\u306a\u3044\u5897\u52a0\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30d5\u30e9\u306e\u9650\u754c\u3092\u5e38\u306b\u62bc\u3057\u5e83\u3052\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u307e\u3067\u306e\u4e16\u4ee3\u3067\u4e3b\u529b\u3068\u306a\u3063\u3066\u304d\u305f\u30ce\u30f3\u30fb\u30ea\u30bf\u30fc\u30f3\u30fb\u30c4\u30fc\u30fb\u30bc\u30ed\uff08NRZ\uff09\u4fe1\u53f7\u65b9\u5f0f\u306f\u30011\u30ec\u30fc\u30f3\u3042\u305f\u308a25Gbps\u3092\u8d85\u3048\u308b\u30c7\u30fc\u30bf\u30ec\u30fc\u30c8\u306b\u304a\u3044\u3066\u3001\u57fa\u672c\u7684\u306a\u7269\u7406\u7684\u9650\u754c\u306b\u9054\u3057\u3064\u3064\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u767b\u5834\u3057\u305f\u306e\u304c <\/span><span class=\"qc-p1-tag\"><strong>PAM4\uff084\u30ec\u30d9\u30eb\u30d1\u30eb\u30b9\u632f\u5e45\u5909\u8abf\uff09<\/strong><\/span><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\">, \u3001\u6b21\u4e16\u4ee3\u306e\u9ad8\u901f\u5316\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u91cd\u8981\u306a\u5909\u8abf\u65b9\u5f0f\u3067\u3042\u308b <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26045-400g-qsfp-dd-osfp-qsfp112.htm\"><span class=\"qc-p1-tag\"><strong>\u9ad8\u901f\u5149\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30e2\u30b8\u30e5\u30fc\u30eb<\/strong><\/span><\/a><span class=\"qc-p1-tag\" style=\"color: rgb(64, 64, 64);\"> \u304a\u3088\u3073\u96fb\u6c17\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u3082\u305d\u3082PAM4\u3068\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\uff1f\u307e\u305f\u3001\u306a\u305c\u3053\u308c\u307b\u3069\u91cd\u8981\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u25b6 \u4e3b\u306a\u30dd\u30a4\u30f3\u30c8<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>PAM4\u306f4\u3064\u306e\u4fe1\u53f7\u30ec\u30d9\u30eb\u3092\u7528\u3044\u3066\u4e00\u5ea6\u306b2\u30d3\u30c3\u30c8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5e2f\u57df\u5e45\u3092\u5897\u3084\u3059\u3053\u3068\u306a\u304f\u30c7\u30fc\u30bf\u8ee2\u9001\u901f\u5ea6\u30922\u500d\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p><\/li><li><p>NRZ\u306a\u3069\u306e\u5f93\u6765\u306e\u65b9\u5f0f\u306b\u6bd4\u3079\u3001PAM4\u306f\u3088\u308a\u9ad8\u901f\u3067\u3059\u3002\u305f\u3060\u3057\u3001PAM4\u3067\u306f\u30a8\u30e9\u30fc\u8a02\u6b63\u6a5f\u80fd\u304c\u3088\u308a\u9ad8\u5ea6\u306a\u3082\u306e\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u96fb\u5727\u30ec\u30d9\u30eb\u9593\u306e\u9593\u9694\u304c\u72ed\u3044\u305f\u3081\u3001\u3088\u308a\u6d17\u7df4\u3055\u308c\u305f\u4fe1\u53f7\u51e6\u7406\u3082\u6c42\u3081\u3089\u308c\u307e\u3059\u3002.<\/p><\/li><li><p>PAM4\u306f\u3001\u9ad8\u901f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304a\u3088\u3073\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u3067\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u5149\u30b7\u30b9\u30c6\u30e0\u3067\u3082\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u74b0\u5883\u3067\u306f\u3001\u30af\u30e9\u30a6\u30c9\u3001\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u30015G\u306a\u3069\u304b\u3089\u751f\u3058\u308b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p><\/li><li><p>PAM4\u306b\u306f\u3001\u30ce\u30a4\u30ba\u306b\u5bfe\u3057\u3066\u654f\u611f\u3067\u3042\u308b\u3068\u3044\u3063\u305f\u8ab2\u984c\u304c\u3042\u308a\u307e\u3059\u3002\u4fe1\u53f7\u54c1\u8cea\u306e\u78ba\u4fdd\u3082\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002\u9ad8\u5ea6\u306a\u30a4\u30b3\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u304a\u3088\u3073\u30a8\u30e9\u30fc\u8a02\u6b63\u6280\u8853\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u306e\u5b89\u5168\u6027\u3068\u4fe1\u983c\u6027\u3092\u7dad\u6301\u3057\u3066\u3044\u307e\u3059\u3002.<\/p><\/li><li><p>PAM4\u3092\u5b66\u3076\u3053\u3068\u3067\u3001\u9ad8\u901f\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u4eca\u65e5\u6700\u3082\u9ad8\u901f\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6280\u8853\u3092\u6271\u3046\u305f\u3081\u306e\u6e96\u5099\u3082\u6574\u3044\u307e\u3059\u3002.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u25b6 NRZ\u3092\u8d85\u3048\u3066\uff1a\u306a\u305cPAM4\u304c\u5fc5\u8981\u306a\u306e\u304b<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ja\/glossary\/understanding-non-return-to-zero-in-digital-communication\/\"><strong>NRZ<\/strong><\/a><strong>, \u3001\u3044\u308f\u3086\u308bPAM2<\/strong>, \u306f\u3001\u30c7\u30b8\u30bf\u30eb\u30c7\u30fc\u30bf\u3092\u8868\u3059\u305f\u3081\u306b2\u3064\u306e\u96fb\u5727\u30ec\u30d9\u30eb\uff08\u300c1\u300d\u3092\u8868\u3059\u9ad8\u30ec\u30d9\u30eb\u3068\u300c0\u300d\u3092\u8868\u3059\u4f4e\u30ec\u30d9\u30eb\uff09\u3092\u7528\u3044\u307e\u3059\u30021\u30b7\u30f3\u30dc\u30eb\u5468\u671f\u30671\u30d3\u30c3\u30c8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u30b7\u30f3\u30d7\u30eb\u304b\u3064\u5805\u7262\u306a\u65b9\u5f0f\u3067\u3042\u308a\u3001\u9577\u5e74\u306b\u308f\u305f\u308a\u5e83\u304f\u6d3b\u7528\u3055\u308c\u3066\u304d\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u30c7\u30fc\u30bf\u30ec\u30fc\u30c8\u304c56Gbps\u3001112Gbps\uff0f\u30ec\u30fc\u30f3\u3001\u3055\u3089\u306b\u306f\u305d\u308c\u3092\u8d85\u3048\u308b\u6c34\u6e96\u3078\u3068\u4e0a\u6607\u3059\u308b\u306b\u3064\u308c\u3001NRZ\u306f\u91cd\u5927\u306a\u8ab2\u984c\u306b\u76f4\u9762\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px;\"><strong>\u5e2f\u57df\u5e45\u306e\u5236\u7d04\uff1a<\/strong> \u3088\u308a\u9ad8\u901f\u306aNRZ\u4fe1\u53f7\u3092\u4f1d\u9001\u3059\u308b\u306b\u306f\u3001\u30c1\u30e3\u30cd\u30eb\u5e2f\u57df\u5e45\u3092\u6307\u6570\u95a2\u6570\u7684\u306b\u62e1\u5927\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff08\u30dc\u30fc\u30ec\u30fc\u30c8\u306b\u6bd4\u4f8b\uff09\u3002\u30d7\u30ea\u30f3\u30c8\u57fa\u677f\uff08PCB\uff09\u4e0a\u306e\u9285\u30d1\u30bf\u30fc\u30f3\u3001\u96fb\u6c17\u30b3\u30cd\u30af\u30bf\u3001\u3055\u3089\u306b\u306f\u5149\u90e8\u54c1\u306b\u81f3\u308b\u307e\u3067\u3001\u3053\u308c\u3089\u306e\u5468\u6ce2\u6570\u3092\u640d\u5931\u306e\u5c11\u306a\u3044\u5f62\u3067\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u304c\u56f0\u96e3\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u4fe1\u53f7\u5b8c\u5168\u6027\u306e\u8ab2\u984c\uff1a<\/strong> \u9ad8\u3044\u30dc\u30fc\u30ec\u30fc\u30c8\u3067\u306f\u3001\u4fe1\u53f7\u6574\u5408\u6027\u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\u306b\u304a\u3051\u308b\u300c\u30a2\u30a4\u300d\u958b\u53e3\u90e8\u304c\u72ed\u304f\u306a\u308a\u3001\u4fe1\u53f7\u306f\u30ce\u30a4\u30ba\u3001\u30b8\u30c3\u30bf\u3001\u6e1b\u8870\u306b\u5bfe\u3057\u3066\u306f\u308b\u304b\u306b\u8106\u5f31\u306b\u306a\u308a\u307e\u3059\u3002\u30a8\u30e9\u30fc\u7387\u306f\u6025\u5897\u3057\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u6d88\u8cbb\u96fb\u529b\uff1a<\/strong> \u6975\u7aef\u306aNRZ\u901f\u5ea6\u306b\u304a\u3044\u3066\u5fc5\u8981\u306a\u4fe1\u53f7\u6574\u5408\u6027\u3092\u9054\u6210\u3059\u308b\u306b\u306f\u3001\u3057\u3070\u3057\u3070\u8907\u96d1\u3067\u6d88\u8cbb\u96fb\u529b\u306e\u5927\u304d\u3044\u7b49\u5316\u6280\u8853\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p><\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"1100\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/237b0c2edabc4c95814384632353d425.webp\" alt=\"4-level Pulse Amplitude Modulation (PAM4)\" class=\"wp-image-3607\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/237b0c2edabc4c95814384632353d425.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/237b0c2edabc4c95814384632353d425-300x275.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/237b0c2edabc4c95814384632353d425-1024x939.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/237b0c2edabc4c95814384632353d425-768x704.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/237b0c2edabc4c95814384632353d425-13x12.webp 13w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PAM4\uff1a\u30c7\u30fc\u30bf\u91cf\u3092\u500d\u5897\u3055\u305b\u3001\u30dc\u30fc\u30ec\u30fc\u30c8\u306f\u500d\u5897\u3055\u305b\u306a\u3044<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PAM4\u306f\u3001\u30c7\u30fc\u30bf\u306e\u7b26\u53f7\u5316\u65b9\u6cd5\u3092\u6839\u672c\u7684\u306b\u5909\u3048\u308b\u3053\u3068\u3067\u3001\u3053\u308c\u3089\u306e\u5236\u9650\u3092\u514b\u670d\u3057\u307e\u3059\u30022\u3064\u306e\u30ec\u30d9\u30eb\u3067\u306f\u306a\u304f\u3001PAM4\u306f <strong>four distinct voltage levels<\/strong>. \u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\">\u30ec\u30d9\u30eb0\uff1a <code>00<\/code><\/p><\/li><li><p style=\"margin: 0px;\">\u30ec\u30d9\u30eb1\uff1a <code>01<\/code><\/p><\/li><li><p style=\"margin: 0px;\">\u30ec\u30d9\u30eb2\uff1a <code>10<\/code><\/p><\/li><li><p style=\"margin: 0px;\">\u30ec\u30d9\u30eb3\uff1a <code>11<\/code><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e3b\u306a\u5229\u70b9\u306f\uff1fPAM4\u306f\u30011\u30b7\u30f3\u30dc\u30eb\u5468\u671f\u3042\u305f\u308a2\u30d3\u30c3\u30c8\u306e\u60c5\u5831\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/strong>, \u3053\u308c\u306f\u3001NRZ\u306e1\u30d3\u30c3\u30c8\u3068\u6bd4\u8f03\u3057\u30662\u500d\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u540c\u4e00\u306e\u30dc\u30fc\u30ec\u30fc\u30c8\uff081\u79d2\u3042\u305f\u308a\u306e\u30b7\u30f3\u30dc\u30eb\u6570\uff09\u306b\u304a\u3044\u3066\u3001PAM4\u306f\u30c7\u30fc\u30bf\u30ec\u30fc\u30c8\u30922\u500d\u306b\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u25b6 PAM4\u3068NRZ\u306e\u6bd4\u8f03\u56f3<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fbbf4ac046374b7f9db32a61d28e98a9.webp\" alt=\"PAM4 vs. NRZ\" class=\"wp-image-4020\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fbbf4ac046374b7f9db32a61d28e98a9.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fbbf4ac046374b7f9db32a61d28e98a9-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fbbf4ac046374b7f9db32a61d28e98a9-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fbbf4ac046374b7f9db32a61d28e98a9-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/fbbf4ac046374b7f9db32a61d28e98a9-18x12.webp 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=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\"><p><strong>\u6a5f\u80fd<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>NRZ\uff08PAM2\uff09<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>PAM4<\/strong><\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p><strong>PAM4\u306e\u5229\u70b9<\/strong><\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u30ec\u30d9\u30eb\u6570<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2 (0, 1)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>4 (00, 01, 10, 11)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u30b7\u30f3\u30dc\u30eb\u3042\u305f\u308a\u306e\u30c7\u30fc\u30bf\u91cf\u3092\u5897\u52a0\u53ef\u80fd<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u30d3\u30c3\u30c8\uff0f\u30b7\u30f3\u30dc\u30eb<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>1<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>2<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>\u540c\u4e00\u30dc\u30fc\u30ec\u30fc\u30c8\u3067\u30c7\u30fc\u30bf\u30ec\u30fc\u30c8\u30922\u500d\u5316<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u5bfe\u8c61\u30c7\u30fc\u30bf\u30ec\u30fc\u30c8\u306b\u5bfe\u3059\u308b\u30dc\u30fc\u30ec\u30fc\u30c8<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u9ad8\u3044\uff08\u4f8b\uff1a56Gbps\u306e\u5834\u540856GBaud\uff09<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u4f4e\u3044\uff08\u4f8b\uff1a56Gbps\u306e\u5834\u540828GBaud\uff09<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p><strong>\u30c1\u30e3\u30cd\u30eb\u5e2f\u57df\u5e45\u8981\u4ef6\u306e\u4f4e\u6e1b<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u4fe1\u53f7\u306e\u8907\u96d1\u3055<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u4f4e\u3044<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u9ad8\u3044\uff08\u96fb\u5727\u30de\u30fc\u30b8\u30f3\u304c\u5c0f\u3055\u3044\uff09<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>NRZ\u306f\u5358\u7d14\u3060\u304c\u3001\u9ad8\u901f\u5316\u306b\u306fPAM4\u304c\u4e0d\u53ef\u6b20<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u30ce\u30a4\u30ba\u611f\u5ea6<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u30d3\u30c3\u30c8\u3042\u305f\u308a\u306e\u611f\u5ea6\u306f\u4f4e\u3044<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u30d3\u30c3\u30c8\u3042\u305f\u308a\u306e\u611f\u5ea6\u306f\u9ad8\u3044<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u3088\u308a\u9ad8\u5ea6\u306a\u6280\u8853\u3092\u5fc5\u8981\u3068\u3059\u308b <strong>DSP<\/strong><\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\"><p><strong>\u4e3b\u306a\u7528\u9014<\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u226425\/28Gbps\uff0f\u30ec\u30fc\u30f3<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>56Gbps\u3001112Gbps\u3001224Gbps\uff0f\u30ec\u30fc\u30f3<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u6b21\u4e16\u4ee3\u306e\u9ad8\u901f\u5316\u3092\u5b9f\u73fe<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u25b6 PAM4\u306e\u52d5\u4f5c\u539f\u7406\uff1a\u4fe1\u53f7\u751f\u6210\u3068\u8ab2\u984c<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PAM4\u4fe1\u53f7\u306e\u751f\u6210\u304a\u3088\u3073\u89e3\u91c8\u306f\u3001NRZ\u3088\u308a\u3082\u8907\u96d1\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p style=\"margin: 0px;\"><strong>\u9001\u4fe1\u6a5f\uff1a<\/strong> \u5165\u529b\u30c7\u30fc\u30bf\u30b9\u30c8\u30ea\u30fc\u30e0\u306f2\u30d3\u30c3\u30c8\u305a\u3064\u306e\u30da\u30a2\u306b\u5206\u5272\u3055\u308c\u307e\u3059\uff08<code>00<\/code>, <code>01<\/code>, <code>10<\/code>, <code>11<\/code>\uff09\u3002\u9001\u4fe1\u6a5f\u306e\u30c9\u30e9\u30a4\u30d0\u56de\u8def\u306f\u3001\u54042\u30d3\u30c3\u30c8\u7d44\u307f\u5408\u308f\u305b\u306b\u5bfe\u5fdc\u3059\u308b4\u3064\u306e\u7cbe\u5bc6\u306a\u96fb\u5727\u632f\u5e45\u306e\u3044\u305a\u308c\u304b\u3092\u6301\u3064\u30a2\u30ca\u30ed\u30b0\u4fe1\u53f7\u3092\u751f\u6210\u3057\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u30c1\u30e3\u30cd\u30eb\uff1a<\/strong> \u4fe1\u53f7\u306f\u7269\u7406\u5a92\u4f53\uff08PCB\u30c8\u30ec\u30fc\u30b9\u3001\u30b1\u30fc\u30d6\u30eb\u3001\u5149\u30d5\u30a1\u30a4\u30d0\u30ea\u30f3\u30af\uff09\u3092\u901a\u904e\u3057\u307e\u3059\u3002\u3053\u306e\u969b\u3001\u6e1b\u8870\u3001\u6b6a\u307f\u3001\u30ce\u30a4\u30ba\u304c\u767a\u751f\u3057\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px 0px 4px;\"><strong>\u53d7\u4fe1\u6a5f\uff1a<\/strong> \u3053\u3053\u304c\u5927\u5e45\u306b\u8907\u96d1\u5316\u3059\u308b\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002\u53d7\u4fe1\u6a5f\u306f\u3001\u5358\u306b2\u3064\u306e\u96fb\u5727\u30ec\u30d9\u30eb\u3092\u8b58\u5225\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u30014\u3064\u306e\u96fb\u5727\u30ec\u30d9\u30eb\u3092\u533a\u5225\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u96a3\u63a5\u3059\u308b\u30ec\u30d9\u30eb\u9593\u306e\u96fb\u5727\u5dee\uff08\u4f8b\uff1a\u30ec\u30d9\u30eb1\u304b\u3089\u30ec\u30d9\u30eb2\uff09\u306f\u3001NRZ\u306e\u5168\u30b9\u30a4\u30f3\u30b0\u306e\u308f\u305a\u304b3\u5206\u306e1\u3067\u3059\u3002\u3053\u306e\u5c0f\u3055\u306a <strong>\u30a2\u30a4\u306e\u9ad8\u3055<\/strong> PAM4\u3092\u672c\u8cea\u7684\u306b\u4ee5\u4e0b\u306b\u5bfe\u3057\u3066\u3088\u308a\u654f\u611f\u306b\u3057\u307e\u3059\uff1a<\/p><ul><li><p style=\"margin: 0px;\"><strong>\u30ce\u30a4\u30ba\uff1a<\/strong> \u30e9\u30f3\u30c0\u30e0\u306a\u5909\u52d5\u306b\u3088\u308a\u3001\u4fe1\u53f7\u30ec\u30d9\u30eb\u304c\u96a3\u63a5\u3059\u308b\u30ec\u30d9\u30eb\u306e\u5224\u5b9a\u9818\u57df\u306b\u5bb9\u6613\u306b\u62bc\u3057\u8fbc\u307e\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u6e1b\u8870\uff08\u30a2\u30c3\u30c6\u30cd\u30fc\u30b7\u30e7\u30f3\uff09\uff1a<\/strong> \u4fe1\u53f7\u640d\u5931\u306b\u3088\u308a\u632f\u5e45\u304c\u6e1b\u5c11\u3057\u3001\u30a2\u30a4\u30fb\u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\u304c\u3055\u3089\u306b\u72ed\u304f\u306a\u308a\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u6b6a\u307f\uff08ISI\uff09\uff1a<\/strong> \u6642\u9593\u7684\u5e83\u304c\u308a\u306b\u3088\u308a\u4fe1\u53f7\u304c\u62e1\u6563\u3057\u3001\u30b7\u30f3\u30dc\u30eb\u540c\u58eb\u304c\u5e72\u6e09\u3057\u307e\u3059\u3002.<\/p><\/li><\/ul><\/li><li><p style=\"margin: 0px 0px 4px;\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ja\/glossary\/digital-signal-processor-functionality-in-optical-transceivers\/\"><strong>\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u51e6\u7406\uff08DSP\uff09<\/strong><\/a><strong>:<\/strong> \u3053\u308c\u3089\u306e\u8ab2\u984c\u3092\u514b\u670d\u3059\u308b\u305f\u3081\u306b\u3001\u73fe\u4ee3\u306ePAM4\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u4e21\u7aef\u3067\u306e\u9ad8\u5ea6\u306aDSP\uff08\u30c7\u30b8\u30bf\u30eb\u4fe1\u53f7\u51e6\u7406\uff09\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\uff1a<\/p><ul><li><p style=\"margin: 0px;\"><strong>\u9001\u4fe1\u6a5f\uff1a<\/strong> \u30c1\u30e3\u30cd\u30eb\u306e\u6b6a\u307f\u3092\u4e8b\u524d\u306b\u88dc\u6b63\u3059\u308b\u305f\u3081\u3001\u30d5\u30a3\u30fc\u30c9\u30d5\u30a9\u30ef\u30fc\u30c9\u7b49\u5316\uff08FFE\uff09\u306a\u3069\u306e\u6280\u8853\u3092\u7528\u3044\u3066\u4fe1\u53f7\u3092\u4e88\u3081\u6574\u5f62\u3057\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u53d7\u4fe1\u6a5f\uff1a<\/strong> \u5f37\u529b\u306a\u7b49\u5316\uff08\u4f8b\uff1a\u9023\u7d9a\u6642\u9593\u7dda\u5f62\u7b49\u5316\uff08CTLE\uff09\u3001\u6c7a\u5b9a\u5e30\u9084\u7b49\u5316\uff08DFE\uff09\uff09\u304a\u3088\u3073\u3057\u3070\u3057\u3070\u524d\u65b9\u8aa4\u308a\u8a02\u6b63\uff08FEC\uff09\u3092\u7528\u3044\u3066\u3001\u30a2\u30a4\u30fb\u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\u3092\u958b\u304d\u3001\u640d\u5931\uff0f\u6b6a\u307f\u3092\u88dc\u511f\u3057\u3001\u30ce\u30a4\u30ba\u304a\u3088\u3073\u72ed\u3044\u30ec\u30d9\u30eb\u9593\u9694\u306b\u3088\u3063\u3066\u5f15\u304d\u8d77\u3053\u3055\u308c\u308b\u30a8\u30e9\u30fc\u3092\u8a02\u6b63\u3057\u307e\u3059\u3002FEC\u306f\u82e5\u5e72\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u307e\u3059\u304c\u3001\u8a31\u5bb9\u53ef\u80fd\u306a<br>9. \u3092\u5b9f\u73fe\u3059\u308b\u306b\u306f\u4e0d\u53ef\u6b20\u3067\u3059\u3002<br>10. \u25b6 \u5f71\u97ff\uff1aPAM4\u304c\u672a\u6765\u3092\u652f\u3048\u308b\u5834\u6240<br>11. PAM4\u306f\u3001\u73fe\u5728\u304a\u3088\u3073\u6b21\u4e16\u4ee3\u306e\u9ad8\u901f\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u57fa\u76e4\u3067\u3059\uff1a <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/ja\/glossary\/understanding-what-is-bit-error-rate\/\"><strong>\u30d3\u30c3\u30c8\u30a8\u30e9\u30fc\u7387\uff08BER\uff09<\/strong><\/a> in PAM4 systems.<\/p><\/li><\/ul><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u25b6 The Impact: Where PAM4 Powers the Future<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PAM4 is the foundation for the current and next wave of high-speed interfaces:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><strong>400 Gigabit Ethernet (400GbE):<\/strong> \u4e3b\u306b8\u30c1\u30e3\u30cd\u30eb\u306e56Gbps PAM4\uff088\u00d750G\uff09\u307e\u305f\u306f4\u30c1\u30e3\u30cd\u30eb\u306e112Gbps PAM4\uff084\u00d7100G\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>800 Gigabit Ethernet (800GbE):<\/strong> 112Gbps PAM4\u306e8\u30ec\u30fc\u30f3\uff088\u00d7100G\uff09\u3092\u6d3b\u7528\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>6\u30c6\u30e9\u30d3\u30c3\u30c8\u30fb\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\uff081.6TbE\uff09\uff1a<\/strong> \u65b0\u898f\u898f\u683c\u3067\u306f\u30018\u30c1\u30e3\u30cd\u30eb\u306e224Gbps PAM4\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u76f8\u4e92\u63a5\u7d9a\uff08DCI\uff09\uff1a<\/strong> \u975e\u5e38\u306b\u5927\u898f\u6a21\u306a\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u51e6\u7406\u3059\u308b\u5de8\u5927\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u9593\u306e\u63a5\u7d9a\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>AI\uff0fML\u30af\u30e9\u30b9\u30bf\u30fc\uff1a<\/strong> GPU\uff0fTPU\u9593\u306e\u9ad8\u5e2f\u57df\u5e45\u30fb\u4f4e\u9045\u5ef6\u30a4\u30f3\u30bf\u30fc\u30b3\u30cd\u30af\u30c8\u306f\u5fc5\u9808\u3067\u3042\u308a\u3001PAM4\u30d9\u30fc\u30b9\u306e\u5149\u901a\u4fe1\u304a\u3088\u3073\u9285\u7dda\u901a\u4fe1\u6280\u8853\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30d0\u30fc\u30c1\u30e3\u30cd\u30eb\uff1a<\/strong> \u3088\u308a\u9ad8\u901f\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u25b6 LINK-PP\u5149\u5b66\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\uff1a\u3042\u306a\u305f\u306ePAM4\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/strong><\/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\/c20a116e1e8045fea5af8dfd300c089e.webp\" alt=\"LINK-PP\" class=\"wp-image-4021\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c20a116e1e8045fea5af8dfd300c089e.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c20a116e1e8045fea5af8dfd300c089e-300x169.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c20a116e1e8045fea5af8dfd300c089e-1024x576.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c20a116e1e8045fea5af8dfd300c089e-768x432.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/c20a116e1e8045fea5af8dfd300c089e-18x10.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fe1\u983c\u6027\u306e\u9ad8\u3044PAM4\u6280\u8853\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u9ad8\u5ea6\u306b\u8a2d\u8a08\u3055\u308c\u305f <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>\u5149\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u3059\u3002<\/strong><\/a>. <strong>LINK-PP<\/strong> LINK-PP\u304c\u6700\u5148\u7aef\u3092\u8d70\u3063\u3066\u304a\u308a\u3001\u73fe\u4ee3\u306e\u9ad8\u901f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u6c42\u3081\u308b\u53b3\u3057\u3044\u8981\u4ef6\u3092\u6e80\u305f\u3059\u6700\u5148\u7aefPAM4\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u3092\u8a2d\u8a08\u30fb\u88fd\u9020\u3057\u3066\u3044\u307e\u3059\u3002\u5f53\u793e\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u306f\u3001 <strong>\u9ad8\u5ea6\u306aDSP<\/strong>, \u3001\u9ad8\u54c1\u8cea\u90e8\u54c1\u3001\u304a\u3088\u3073\u53b3\u683c\u306a\u30c6\u30b9\u30c8\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u304a\u308a\u3001\u904e\u9177\u306a\u74b0\u5883\u4e0b\u3067\u3082\u6700\u9069\u306a\u4fe1\u53f7\u5b8c\u5168\u6027\u3068\u6027\u80fd\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e3b\u306aLINK-PP PAM4\u5149\u5b66\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u88fd\u54c1\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px;\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472000.htm\"><strong>LINK-PP LQD-CW400-FR4C:<\/strong><\/a> \u30b7\u30f3\u30b0\u30eb\u30e2\u30fc\u30c9\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u3092\u7528\u3044\u305f2km\u4f1d\u9001\u8ddd\u96e2\u5411\u3051\u9ad8\u6027\u80fd400G\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u3001\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u306e\u30b9\u30d1\u30a4\u30f3\u304a\u3088\u3073\u76f8\u4e92\u63a5\u7d9a\u306b\u6700\u9069\u3067\u3059\u3002. <em>\uff08400G\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u30fb\u30d5\u30a1\u30d6\u30ea\u30c3\u30af\u306e\u30cb\u30fc\u30ba\u306b\u5b8c\u74a7\u306b\u5bfe\u5fdc\uff09<\/em><\/p><\/li><li><p style=\"margin: 0px;\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/473139.htm\"><strong>LINK-PP LQ-M85200-SR4C:<\/strong><\/a> \u3053\u306e\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u306f\u3001\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u304a\u3088\u3073\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306a\u3069\u3001\u77ed\u8ddd\u96e2\u4f1d\u9001\u3092\u4e3b\u3068\u3059\u308b\u30b7\u30fc\u30f3\u3067\u4f7f\u7528\u3055\u308c\u3001\u9ad8\u901f\u30c7\u30fc\u30bf\u4f1d\u9001\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3092\u4ecb\u3057\u3066\u5e83\u7bc4\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u307e\u3059\u3002 <strong>\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u5149\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u3001<\/strong> PAM4\u4fe1\u53f7\u306e\u8907\u96d1\u3055\u3092\u78ba\u5b9f\u306b\u51e6\u7406\u3067\u304d\u308b\u3088\u3046\u8a2d\u8a08\u3055\u308c\u3066\u304a\u308a\u3001\u304a\u5ba2\u69d8\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u5fc5\u8981\u306a <strong>\u30d0\u30f3\u30c9\u5e45\u5bc6\u5ea6<\/strong> \u304a\u3088\u3073\u6027\u80fd\u3092\u4f4e\u6d88\u8cbb\u96fb\u529b\u3067\u9054\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u25b6 PAM4\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p style=\"margin: 0px 0px 4px;\"><strong>\u5229\u70b9\uff1a<\/strong><\/p><ul><li><p style=\"margin: 0px;\"><strong>\u30d0\u30f3\u30c9\u5e45\u52b9\u7387\u306e2\u500d\u5316\uff1a<\/strong> \u30dc\u30fc\u30ec\u30fc\u30c8\uff0f\u30c1\u30e3\u30cd\u30eb\u5e2f\u57df\u5e45\u30922\u500d\u306b\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u3088\u308a\u9ad8\u3044\u30c7\u30fc\u30bf\u30ec\u30fc\u30c8\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u3088\u308a\u9ad8\u901f\u306a\u901a\u4fe1\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\uff1a<\/strong> \u65e2\u5b58\u304a\u3088\u3073\u8fd1\u672a\u6765\u306e\u30c1\u30e3\u30cd\u30eb\u80fd\u529b\u3092\u6d3b\u7528\u3057\u3066\u3001 <strong>400G\u3001800G\u3001\u304a\u3088\u30731.6T<\/strong> \u306e\u5b9f\u73fe\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u5f8c\u65b9\u4e92\u63db\u6027\uff1a<\/strong> NRZ\u65b9\u5f0f\u5411\u3051\u306b\u8a2d\u8a08\u3055\u308c\u305f\u65e2\u5b58\u306e\u914d\u7dda\u30a4\u30f3\u30d5\u30e9\u4e0a\u3067\u52d5\u4f5c\u3055\u305b\u3089\u308c\u308b\u5834\u5408\u304c\u591a\u304f\uff08\u305f\u3060\u3057\u3001\u4f1d\u9001\u8ddd\u96e2\u306f\u77ed\u7e2e\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\uff09\u3002.<\/p><\/li><\/ul><\/li><li><p style=\"margin: 0px 0px 4px;\"><strong>\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\uff1a<\/strong><\/p><ul><li><p style=\"margin: 0px;\"><strong>\u8907\u96d1\u3055\u3068\u30b3\u30b9\u30c8\u306e\u5897\u52a0\uff1a<\/strong> \u9ad8\u5ea6\u306aDSP\u304a\u3088\u3073\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u9ad8\u6d88\u8cbb\u96fb\u529b\u306eASIC\uff0fIC\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>\u3088\u308a\u9ad8\u3044SNR\uff08\u4fe1\u53f7\u5bfe\u96d1\u97f3\u6bd4\uff09\u8981\u4ef6\uff1a<\/strong> \u96fb\u5727\u30de\u30fc\u30b8\u30f3\u304c\u5c0f\u3055\u3044\u305f\u3081\u3001\u3088\u308a\u30af\u30ea\u30fc\u30f3\u306a\u30c1\u30e3\u30cd\u30eb\u3068\u512a\u308c\u305f\u4fe1\u53f7\u5b8c\u5168\u6027\u8a2d\u8a08\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>DSP\u306e\u6d88\u8cbb\u96fb\u529b\uff1a<\/strong> \u5f37\u529b\u306a\u7b49\u5316\u304a\u3088\u3073FEC\uff08\u524d\u65b9\u8aa4\u308a\u8a02\u6b63\uff09\u30a8\u30f3\u30b8\u30f3\u306f\u3001\u591a\u5927\u306a\u96fb\u529b\u3092\u6d88\u8cbb\u3057\u307e\u3059\u3002.<\/p><\/li><li><p style=\"margin: 0px;\"><strong>FEC\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\uff1a<\/strong> \u8aa4\u308a\u8a02\u6b63\u306b\u3088\u308a\u9045\u5ef6\u304c\u767a\u751f\u3057\u3001\u751f\u306e\u5e2f\u57df\u5e45\u306e\u4e00\u90e8\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002.<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u25b6 \u7d50\u8ad6\uff1aPAM4\u306f\u4eca\u5f8c\u3082\u7d99\u7d9a\u7684\u306b\u4f7f\u308f\u308c\u307e\u3059<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PAM4\u306f\u30cb\u30c3\u30c1\u306a\u6280\u8853\u3067\u306f\u306a\u304f\u3001\u79c1\u305f\u3061\u306e\u30c7\u30b8\u30bf\u30eb\u4e16\u754c\u3092\u652f\u3048\u308b\u9ad8\u901f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u3068\u3063\u3066\u4e0d\u53ef\u6b20\u306a\u6280\u8853\u3067\u3059\u3002\u78ba\u304b\u306b\u8907\u96d1\u3055\u3092\u4f34\u3044\u307e\u3059\u304c\u3001\u30c1\u30e3\u30cd\u30eb\u5e2f\u57df\u5e45\u3092\u6bd4\u4f8b\u7684\u306b\u5897\u52a0\u3055\u305b\u308b\u3053\u3068\u306a\u304f\u30c7\u30fc\u30bf\u30ec\u30fc\u30c8\u30922\u500d\u306b\u3059\u308b\u3068\u3044\u3046\u30e1\u30ea\u30c3\u30c8\u306f\u3001\u9700\u8981\u306e\u62e1\u5927\u306b\u5fdc\u3058\u3066\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u30b9\u30b1\u30fc\u30eb\u3055\u305b\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002PAM4\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u73fe\u4ee3\u306e\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u3001\u30af\u30e9\u30a6\u30c9\u3001\u901a\u4fe1\u3001\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u8a2d\u8a08\u30fb\u5c55\u958b\u30fb\u904b\u7528\u306b\u95a2\u308f\u308b\u3059\u3079\u3066\u306e\u65b9\u306b\u3068\u3063\u3066\u91cd\u8981\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u3042\u306a\u305f\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067PAM4\u306e\u30d1\u30ef\u30fc\u3092\u6d3b\u7528\u3059\u308b\u6e96\u5099\u306f\u3067\u304d\u307e\u3057\u305f\u304b\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5f53\u793eLINK-PP\u306e\u9ad8\u6027\u80fdPAM4\u5149\u5b66\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u5168\u30e9\u30a4\u30f3\u30ca\u30c3\u30d7\u3001\u7279\u306b\u696d\u754c\u3092\u30ea\u30fc\u30c9\u3059\u308b400G\u304a\u3088\u3073800G\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002.<\/strong> \u5f53\u793e\u306e\u5c02\u9580\u5bb6\u304c\u3001\u304a\u5ba2\u69d8\u306e\u7279\u5b9a\u306e\u5e2f\u57df\u5e45\u3001\u4f1d\u9001\u8ddd\u96e2\u3001\u5bc6\u5ea6\u8981\u4ef6\u306b\u6700\u9069\u306a <strong>\u30b3\u30b9\u30c8\u52b9\u7387\u306e\u9ad8\u3044\u5149\u5b66\u30e2\u30b8\u30e5\u30fc\u30eb\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/strong> \u3092\u3054\u63d0\u6848\u3044\u305f\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/sample.htm\"><strong>PAM4\u5149\u5b66\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u306e\u30b5\u30f3\u30d7\u30eb\u8acb\u6c42 \u279e<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/support.htm\"><strong>\u6280\u8853\u30b5\u30dd\u30fc\u30c8 \u279e<\/strong><\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u3088\u304f\u3042\u308b\u8cea\u554f<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" >PAM4\u3068\u306f\u4f55\u306e\u7565\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PAM4\u306f\u300c4\u30ec\u30d9\u30eb\u30d1\u30eb\u30b9\u632f\u5e45\u5909\u8abf\uff08Pulse Amplitude Modulation with four levels\uff09\u300d\u306e\u7565\u3067\u3059\u30024\u3064\u306e\u7570\u306a\u308b\u96fb\u5727\u30ec\u30d9\u30eb\u3092\u7528\u3044\u3066\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u5404\u30ec\u30d9\u30eb\u306f\u4e00\u610f\u306e2\u30d3\u30c3\u30c8\u30da\u30a2\u3092\u8868\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u306a\u305cPAM4\u3067\u306f\u30a8\u30e9\u30fc\u8a02\u6b63\u304c\u5fc5\u8981\u306a\u306e\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PAM4\u4fe1\u53f7\u306f\u96fb\u5727\u30ec\u30d9\u30eb\u9593\u306e\u9593\u9694\u304c\u72ed\u3044\u305f\u3081\u3001\u30ce\u30a4\u30ba\u306b\u3088\u3063\u3066\u5bb9\u6613\u306b\u8aa4\u308a\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u30a8\u30e9\u30fc\u8a02\u6b63\u306b\u3088\u308a\u3001\u3053\u3046\u3057\u305f\u8aa4\u308a\u3092\u4fee\u6b63\u3057\u3001\u30c7\u30fc\u30bf\u306e\u5b89\u5168\u6027\u3092\u4fdd\u3061\u307e\u3059\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" 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class=\"wp-block-paragraph\">PAM4\u3067\u306f\u30011\u30b7\u30f3\u30dc\u30eb\u3042\u305f\u308a2\u30d3\u30c3\u30c8\u3092\u9001\u4fe1\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5e2f\u57df\u5e45\u3092\u5897\u3084\u3055\u305a\u306b\u30c7\u30fc\u30bf\u30ec\u30fc\u30c8\u30922\u500d\u306b\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u3088\u308a\u9ad8\u901f\u304b\u3064\u52b9\u7387\u7684\u306b\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >PAM4\u306f\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u306e\u307f\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u3044\u3044\u3048\u3001PAM4\u306f\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u3060\u3051\u3067\u306a\u304f\u3001\u9285\u7dda\u30b1\u30fc\u30d6\u30eb\u3067\u3082\u4f7f\u7528\u53ef\u80fd\u3067\u3059\u3002\u591a\u304f\u306e\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u3067\u306f\u3001\u4e21\u65b9\u306e\u63a5\u7d9a\u30bf\u30a4\u30d7\u306bPAM4\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow 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