{"id":3912,"date":"2026-09-17T03:01:33","date_gmt":"2026-09-17T03:01:33","guid":{"rendered":"https:\/\/firstfibertech.com\/?p=3912"},"modified":"2026-09-17T10:26:46","modified_gmt":"2026-09-17T10:26:46","slug":"%e6%a0%b8%e5%bf%83otdr%e5%8f%82%e6%95%b0%e7%9a%84%e7%89%a9%e7%90%86%e6%9c%ba%e5%88%b6%e5%8f%8a%e5%85%b6%e5%ba%95%e5%b1%82%e7%ae%97%e6%b3%95%e9%80%bb%e8%be%91","status":"publish","type":"post","link":"https:\/\/firstfibertech.com\/zh\/blog\/physical-mechanisms-and-underlying-algorithm-logic-of-core-otdr-parameters\/","title":{"rendered":"\u6838\u5fc3OTDR\u53c2\u6570\u7684\u7269\u7406\u673a\u5236\u53ca\u5e95\u5c42\u7b97\u6cd5\u903b\u8f91"},"content":{"rendered":"<p class=\"wp-block-paragraph\">\u4e00\u79cd\u5149\u65f6\u57df\u53cd\u5c04\u4eea\uff08<a href=\"https:\/\/firstfibertech.com\/zh\/%e4%ba%a7%e5%93%81\/8000max-otdr\/\" data-type=\"ff_products\" data-id=\"469\">OTDR<\/a>) \u901a\u8fc7\u6ce8\u5165\u5149\u8109\u51b2\u5e76\u5206\u6790\u5176\u540e\u5411\u6563\u5c04\u548c\u53cd\u5c04\u4fe1\u53f7\uff0c\u7ed8\u5236\u5149\u7ea4\u94fe\u8def\u7684\u7269\u7406\u201c\u62d3\u6251\u56fe\u201d\u3002 \u4e3a\u4e86\u83b7\u5f97\u51c6\u786e\u7684\u6d4b\u8bd5\u66f2\u7ebf\uff0c\u5fc5\u987b\u6839\u636e\u88ab\u6d4b\u94fe\u8def\u7684\u5b9e\u9645\u7269\u7406\u7279\u6027\u7cbe\u786e\u914d\u7f6e\u53c2\u6570\u3002\u8bbe\u7f6eOTDR\u53c2\u6570\u672c\u8d28\u4e0a\u662f\u5728\u5149\u80fd\u91cf\u6ce8\u5165\u3001\u4fe1\u566a\u6bd4\uff08SNR\uff09\u548c\u7a7a\u95f4\u6d4b\u91cf\u7cbe\u5ea6\u4e4b\u95f4\u8fdb\u884c\u7269\u7406\u6743\u8861\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5149\u6ce2\u4e0e\u6d4b\u91cf\u8fb9\u754c\u8bbe\u7f6e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u57fa\u672c\u7684\u53c2\u6570\u51b3\u5b9a\u4e86\u6d4b\u8bd5\u4fe1\u53f7\u7684\u7269\u7406\u7279\u6027\u4ee5\u53ca\u4eea\u5668\u7684\u89c2\u6d4b\u7a97\u53e3\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6ce2\u957f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce2\u957f\u51b3\u5b9a\u4e86\u5149\u4fe1\u53f7\u5728\u5149\u7ea4\u4e2d\u4f20\u8f93\u65f6\u7684\u8870\u51cf\u548c\u6a21\u6001\u7279\u6027\u3002\u5bf9\u4e8e\u5355\u6a21\u5149\u7ea4\uff0c1310nm\u548c1550nm\u662f\u6700\u5e38\u7528\u7684\u6ce2\u957f\u3002 1310nm \u5177\u6709\u66f4\u5f3a\u7684\u745e\u5229\u6563\u5c04\uff0c\u5206\u8fa8\u7387\u7565\u9ad8\uff0c\u4f46\u8870\u51cf\u66f4\u5927\uff1b1550nm \u7684\u8870\u51cf\u8f83\u5c0f\uff0c\u56e0\u6b64\u9002\u5408\u957f\u8ddd\u79bb\u4f20\u8f93\u3002\u5728\u9ad8\u7ea7\u6545\u969c\u6392\u67e5\u4e2d\uff0c\u901a\u5e38\u91c7\u7528\u53cc\u6ce2\u957f\u6d4b\u8bd5\u6765\u8bca\u65ad <strong>\u5b8f\u89c2\u5f2f\u66f2<\/strong>\uff1a\u7531\u4e8e\u8f83\u957f\u7684\u6ce2\u957f\u5bf9\u5f2f\u66f2\u5e94\u529b\u66f4\u4e3a\u654f\u611f\uff0c\u5982\u679c1550nm\u5904\u51fa\u73b0\u660e\u663e\u7684\u635f\u8017\u7a81\u53d8\uff0c\u800c1310nm\u7684\u57fa\u7ebf\u4fdd\u6301\u5e73\u6ed1\uff0c\u5219\u53ef\u5224\u5b9a\u4e3a\u7269\u7406\u5f2f\u66f2\uff0c\u800c\u975e\u7194\u63a5\u4e0d\u826f\u3002 \u6b64\u5916\uff0c1625 nm \u6216 1650 nm \u4e13\u95e8\u7528\u4e8e\u5728\u7ebf\u6d4b\u8bd5\uff1b\u7ed3\u5408\u524d\u7aef\u7684\u9ad8\u9694\u79bb\u5ea6\u6ee4\u6ce2\u5668\uff0c\u53ef\u907f\u514d\u5e72\u6270\u7f51\u7edc\u4e0a\u7684\u6d3b\u8dc3\u6d41\u91cf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8ddd\u79bb\u8303\u56f4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u8303\u56f4\u51b3\u5b9a\u4e86\u6570\u636e\u91c7\u96c6\u65f6X\u8f74\uff08\u65f6\u95f4\/\u8ddd\u79bb\u8f74\uff09\u7684\u7406\u8bba\u7aef\u70b9\uff0c\u901a\u5e38\u8bbe\u7f6e\u4e3a\u5b9e\u9645\u5149\u7ea4\u957f\u5ea6\u76841.5\u81f32\u500d\u3002\u5728\u786c\u4ef6\u5c42\u9762\uff0c\u8be5\u8303\u56f4\u4e25\u683c\u9650\u5236\u4e86\u6fc0\u5149\u5668\u7684 <strong>\u8109\u51b2\u91cd\u590d\u9891\u7387\uff08PRR\uff09<\/strong>. \u4e3a\u4e86\u9632\u6b62\u524d\u4e00\u8109\u51b2\u7684\u8fdc\u7aef\u56de\u6ce2\u4e0e\u4e0b\u4e00\u8109\u51b2\u7684\u8fd1\u7aef\u56de\u6ce2\u53d1\u751f\u91cd\u53e0\uff0c\u5176\u7269\u7406\u5173\u7cfb\u5982\u4e0b\uff1a <math data-latex=\"PRR_{max} = \\frac{c}{2 \\cdot n \\cdot L}\"><semantics><mrow><mi>P<\/mi><mi>R<\/mi><msub><mi>R<\/mi><mrow><mi>m<\/mi><mi>a<\/mi><mi>x<\/mi><\/mrow><\/msub><mo>=<\/mo><mfrac><mi>c<\/mi><mrow><mn>2<\/mn><mo>\u22c5<\/mo><mi>n<\/mi><mo>\u22c5<\/mo><mi>L<\/mi><\/mrow><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\">PRR_{max} = \\frac{c}{2 \\cdot n \\cdot L}<\/annotation><\/semantics><\/math>. \u8303\u56f4\u8bbe\u7f6e\u5f97\u8fc7\u5927\uff08\u589e\u52a0 <math data-latex=\"L\"><semantics><mi>L<\/mi><annotation encoding=\"application\/x-tex\">L<\/annotation><\/semantics><\/math>) \u8feb\u4f7f\u7cfb\u7edf\u964d\u4f4e\u53d1\u5c04\u9891\u7387\uff0c\u4ece\u800c\u5927\u5e45\u51cf\u5c11\u4e86\u5355\u4f4d\u65f6\u95f4\u5185\u5e73\u5747\u7684\u6709\u6548\u8109\u51b2\u6570\u91cf\uff0c\u8fdb\u800c\u4e25\u91cd\u963b\u788d\u4e86\u4fe1\u566a\u6bd4\u7684\u63d0\u5347\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8ddd\u79bb\/\u91c7\u6837\u5206\u8fa8\u7387<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0e\u7531\u5149\u5b66\u8109\u51b2\u51b3\u5b9a\u7684\u201c\u7269\u7406\u7a7a\u95f4\u5206\u8fa8\u7387\u201d\u4e0d\u540c\uff0c\u8ddd\u79bb\u5206\u8fa8\u7387\u662f\u7531\u6a21\u6570\u8f6c\u6362\u5668\uff08ADC\uff09\u91c7\u6837\u7387\u51b3\u5b9a\u7684\u6570\u5b57\u7c92\u5ea6\u3002\u5982\u679cADC\u7684\u91c7\u6837\u9891\u7387\u4e3a <math data-latex=\"f_s\"><semantics><msub><mi>f<\/mi><mi>s<\/mi><\/msub><annotation encoding=\"application\/x-tex\">f_s<\/annotation><\/semantics><\/math>, \uff0c\u8be5\u51b3\u8bae\u662f <math data-latex=\"\\Delta R = \\frac{c}{2 \\cdot n \\cdot f_s}\"><semantics><mrow><mrow><mi mathvariant=\"normal\">\u0394<\/mi><\/mrow><mi>R<\/mi><mo>=<\/mo><mfrac><mi>c<\/mi><mrow><mn>2<\/mn><mo>\u22c5<\/mo><mi>n<\/mi><mo>\u22c5<\/mo><msub><mi>f<\/mi><mi>s<\/mi><\/msub><\/mrow><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\">\\Delta R = \\frac{c}{2 \\cdot n \\cdot f_s}<\/annotation><\/semantics><\/math>. \u4e3a\u4e86\u51c6\u786e\u91cd\u5efa\u8d85\u7a84\u5149\u8109\u51b2\u7684\u8fb9\u7f18\uff0c\u540c\u65f6\u907f\u514d\u5e73\u6ed1\u6389\u9636\u8dc3\uff0c\u8ddd\u79bb\u5206\u8fa8\u7387\u5fc5\u987b\u8fdc\u5c0f\u4e8e\u7a7a\u95f4\u5206\u8fa8\u7387\u3002\u7136\u800c\uff0c\u6781\u9ad8\u7684\u5206\u8fa8\u7387\u4f1a\u5bfc\u81f4\u5b58\u50a8\u6df1\u5ea6\u4e0d\u8db3\u7684\u95ee\u9898\u3002\u56e0\u6b64\uff0c\u9ad8\u7aefOTDR\u5728\u5bbd\u6d4b\u91cf\u8303\u56f4\u5185\u901a\u8fc7\u786c\u4ef6\u964d\u91c7\u6837\u6280\u672f\uff0c\u52a8\u6001\u5e73\u8861\u6570\u636e\u5bc6\u5ea6\u4e0e\u5b58\u50a8\u9650\u5236\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u80fd\u91cf\u4e0e\u7cbe\u5ea6\u7684\u6781\u9650\u8f83\u91cf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u7ec4\u53c2\u6570\u76f4\u63a5\u51b3\u5b9a\u4e86\u8bbe\u5907\u80fd\u591f\u201c\u770b\u5230\u591a\u8fdc\u201d\u4ee5\u53ca\u201c\u591a\u6e05\u6670\u201d\uff0c\u8fd9\u4ee3\u8868\u4e86OTDR\u5185\u90e8\u6700\u96be\u4ee5\u8c03\u548c\u7684\u7269\u7406\u77db\u76fe\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8109\u51b2\u5bbd\u5ea6<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8109\u51b2\u5bbd\u5ea6\u662f\u51b3\u5b9aOTDR\u6027\u80fd\u7684\u2019\u963f\u5580\u7409\u65af\u4e4b\u8e35\u201d\u3002\u8f83\u957f\u7684\u8109\u51b2\u5bbd\u5ea6\uff08\u4f8b\u598210\u00b5s\uff09\u4f1a\u6ce8\u5165\u5de8\u5927\u7684\u603b\u80fd\u91cf\uff0c\u4ece\u800c\u83b7\u5f97\u6781\u9ad8\u7684\u52a8\u6001\u8303\u56f4\uff08\u7a7f\u900f\u80fd\u529b\uff09\uff1b\u7136\u800c\uff0c\u5b83\u5728\u5149\u7ea4\u4e2d\u5360\u636e\u7684\u7269\u7406\u7a7a\u95f4\u4e5f\u66f4\u957f\uff08<math data-latex=\"L_{pulse} = v_g \\cdot W \/ 2\"><semantics><mrow><msub><mi>L<\/mi><mrow><mi>p<\/mi><mi>u<\/mi><mi>l<\/mi><mi>s<\/mi><mi>e<\/mi><\/mrow><\/msub><mo>=<\/mo><msub><mi>v<\/mi><mi>g<\/mi><\/msub><mo>\u22c5<\/mo><mi>W<\/mi><mi>\/<\/mi><mn>2<\/mn><\/mrow><annotation encoding=\"application\/x-tex\">L_{pulse} = v_g \\cdot W \/ 2<\/annotation><\/semantics><\/math>)\uff0c\u5bfc\u81f4\u76f8\u90bb\u4e8b\u4ef6\u7684\u56de\u6ce2\u76f8\u4e92\u91cd\u53e0\uff0c\u4ece\u800c\u964d\u4f4e\u4e86\u7a7a\u95f4\u5206\u8fa8\u7387\u3002\u8f83\u77ed\u7684\u8109\u51b2\u5bbd\u5ea6\uff08\u4f8b\u5982 5 ns\uff09\u53ef\u63d0\u4f9b\u8d85\u9ad8\u7684\u7a7a\u95f4\u5206\u8fa8\u7387\uff0c\u4f46\u4fe1\u53f7\u5f88\u5bb9\u6613\u88ab\u70ed\u566a\u58f0\u6df9\u6ca1\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e73\u5747\u65f6\u95f4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">OTDR\u63a5\u6536\u5230\u7684\u5355\u4e2a\u5fae\u5f31\u745e\u5229\u4fe1\u53f7\u901a\u5e38\u6df9\u6ca1\u5728\u767d\u566a\u58f0\u4e2d\uff1b\u8be5\u8bbe\u5907\u5fc5\u987b\u53d1\u5c04\u6570\u5343\u4e2a\u8109\u51b2\u5e76\u8fdb\u884c\u540c\u6b65\u65f6\u95f4\u7d2f\u79ef\u3002\u6839\u636e\u7edf\u8ba1\u89c4\u5f8b\uff0c\u4fe1\u566a\u6bd4\uff08SNR\uff09\u7684\u63d0\u5347\u4e0e\u5e73\u5747\u6b21\u6570\u7684\u5e73\u65b9\u6839\u6210\u6b63\u6bd4\u3002 \u5c06\u5e73\u5747\u65f6\u95f4\u4ece15\u79d2\u5ef6\u957f\u81f33\u5206\u949f\uff0c\u52a8\u6001\u8303\u56f4\u53ef\u63d0\u9ad8\u7ea62dB\u81f33dB\uff0c\u4f46\u8d85\u8fc7\u6b64\u65f6\u95f4\u540e\uff0c\u8fb9\u9645\u6536\u76ca\u5c06\u9010\u6e10\u9012\u51cf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e8b\u4ef6\u6b7b\u533a\uff08EDZ\uff09\u548c\u8870\u51cf\u6b7b\u533a\uff08ADZ\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b7b\u533a\u662f\u6307\u524d\u7aef\u96ea\u5d29\u5149\u7535\u4e8c\u6781\u7ba1\uff08APD\uff09\u56e0\u53d7\u5230\u5f3a\u70c8\u7684\u83f2\u6d85\u5c14\u53cd\u5c04\uff08\u4f8b\u5982\u5149\u7ea4\u7aef\u9762\uff09\u800c\u8fdb\u5165\u9971\u548c\u72b6\u6001\u540e\uff0c\u6062\u590d\u7ebf\u6027\u54cd\u5e94\u6240\u5fc5\u9700\u7684\u7269\u7406\u76f2\u533a\u3002 <strong>EDZ<\/strong> \u8fd9\u662f\u533a\u5206\u4e24\u4e2a\u8fde\u7eed\u53cd\u5c04\u4e8b\u4ef6\u6240\u9700\u7684\u6700\u77ed\u8ddd\u79bb\uff0c\u8be5\u8ddd\u79bb\u4e25\u683c\u53d7\u8109\u51b2\u5bbd\u5ea6\u7684\u9650\u5236\u3002. <strong>ADZ<\/strong> \u8fd9\u662f\u63a5\u6536\u673a\u4ece\u9971\u548c\u72b6\u6001\u5b8c\u5168\u6062\u590d\u5e76\u51c6\u786e\u6d4b\u91cf\u540e\u7eed\u745e\u5229\u57fa\u7ebf\u6240\u9700\u7684\u6700\u77ed\u8ddd\u79bb\u3002ADZ \u59cb\u7ec8\u5927\u4e8e EDZ\uff0c\u8fd9\u5bf9 OTDR \u5185\u90e8\u8de8\u963b\u653e\u5927\u5668\uff08TIA\uff09\u7684\u4e3b\u52a8\u94b3\u4f4d\u548c\u6297\u9971\u548c\u6062\u590d\u8bbe\u8ba1\u6784\u6210\u4e86\u4e25\u5cfb\u8003\u9a8c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4ecb\u8d28\u62d3\u6251\u4e0e\u7b97\u6cd5\u51b3\u7b56\u53c2\u6570\uff1a\u4ece\u7535\u4fe1\u53f7\u5230\u7269\u7406\u771f\u76f8<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06\u65f6\u57df\u7535\u4fe1\u53f7\u51c6\u786e\u8f6c\u6362\u4e3a\u8ddd\u57df\u7269\u7406\u91cf\u4ee5\u53ca\u786e\u5b9a\u4e8b\u4ef6\u7684\u53d1\u751f\uff0c\u53d6\u51b3\u4e8e\u5149\u7ea4\u7684\u4ecb\u7535\u5e38\u6570\u548c\u6570\u5b57\u9608\u503c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6298\u5c04\u7387\uff08IOR\uff09\u548c\u540e\u5411\u6563\u5c04\u7cfb\u6570\uff08BSC\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">OTDR\u5b9e\u9645\u4e0a\u6d4b\u91cf\u7684\u662f\u5149\u7684\u4f20\u64ad\u65f6\u95f4\uff1b\u5176\u663e\u793a\u7684\u8ddd\u79bb\u8ba1\u7b97\u516c\u5f0f\u4e3a <math data-latex=\"L = \\frac{c \\cdot t}{2n}\"><semantics><mrow><mi>L<\/mi><mo>=<\/mo><mfrac><mrow><mi>c<\/mi><mo>\u22c5<\/mo><mi>t<\/mi><\/mrow><mrow><mn>2<\/mn><mi>n<\/mi><\/mrow><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\">L = \\frac{c \\cdot t}{2n}<\/annotation><\/semantics><\/math>. IOR \u7684\u5fae\u5c0f\u504f\u5dee\uff08<math data-latex=\"n\"><semantics><mi>n<\/mi><annotation encoding=\"application\/x-tex\">n<\/annotation><\/semantics><\/math>) \u8be5\u503c\u4f1a\u5728\u957f\u8ddd\u79bb\u6d4b\u8bd5\u4e2d\u5bfc\u81f4\u4e25\u91cd\u7684\u7edd\u5bf9\u8ddd\u79bb\u8bef\u5dee\u3002BSC \u4f1a\u5f71\u54cd\u6ce2\u5f62\u66f2\u7ebf\u7684\u7edd\u5bf9\u529f\u7387\u6c34\u5e73\u3002\u5728\u51c6\u786e\u8ba1\u7b97\u8fde\u63a5\u5668\u7684\u5149\u56de\u6ce2\u635f\u8017\uff08ORL\uff09\u65f6\uff0cBSC \u5fc5\u987b\u4e0e\u88ab\u6d4b\u5149\u7ea4\u5b8c\u5168\u5339\u914d\uff0c\u5426\u5219\u8ba1\u7b97\u7ed3\u679c\u5c06\u51fa\u73b0\u4e25\u91cd\u504f\u5dee\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u87ba\u65cb\u56e0\u5b50<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5149\u7ea4\u4ee5\u87ba\u65cb\u72b6\u7f20\u7ed5\u5728\u5149\u7f06\u5185\u7684\u677e\u5957\u7ba1\u4e2d\uff0c\u8fd9\u610f\u5473\u7740\u5b9e\u9645\u7684\u5149\u5b66\u7269\u7406\u957f\u5ea6\u603b\u662f\u5927\u4e8e\u5149\u7f06\u5916\u62a4\u5957\u7684\u957f\u5ea6\u3002 \u901a\u8fc7\u5411\u8bbe\u5907\u8f93\u5165\u87ba\u65cb\u7cfb\u6570\uff08\u901a\u5e38\u4e3a1%\u81f32%\uff09\uff0c\u56fa\u4ef6\u4f1a\u81ea\u52a8\u6309\u5149\u7ea4\u957f\u5ea6\u4e0e\u7535\u7f06\u62a4\u5957\u957f\u5ea6\u7684\u6bd4\u4f8b\u8fdb\u884c\u7f29\u653e\uff0c\u4ece\u800c\u5b9e\u73b0\u7cbe\u786e\u7684\u5916\u90e8\u6545\u969c\u5b9a\u4f4d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e8b\u4ef6\u51b3\u7b56\u9608\u503c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u62fc\u63a5\u635f\u8017\u9608\u503c\uff1a<\/strong> \u8bbe\u7f6e\u975e\u53cd\u5c04\u4e8b\u4ef6\uff08\u63a5\u5934\u3001\u5927\u5f2f\u66f2\uff09\u7684\u7075\u654f\u5ea6\u4e0b\u9650\uff08\u7ef4\u62a4\u65f6\u901a\u5e38\u4e3a0.05dB\uff0c\u4e3b\u5e72\u7f51\u9a8c\u6536\u65f6\u901a\u5e38\u4e3a0.01dB\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u53cd\u5c04\u7387\u9608\u503c\uff1a<\/strong> \u7528\u4e8e\u8bc6\u522b\u76f8\u5bf9\u4e8e\u57fa\u7ebf\u7a81\u53d8\u5cf0\u503c\u7684\u83f2\u6d85\u5c14\u53cd\u5c04\u4e8b\u4ef6\u7684\u7ea2\u7ebf\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5149\u7ea4\u672b\u7aef\uff08EOF\uff09\u9608\u503c\uff1a<\/strong> \u786e\u5b9a\u94fe\u8def\u7269\u7406\u7ec8\u70b9\u7684\u8870\u51cf\u7ea2\u7ebf\uff08\u9ed8\u8ba4\u503c\u901a\u5e38\u4e3a3dB\uff09\u3002\u4e00\u65e6\u8870\u51cf\u8d85\u8fc7\u8be5\u503c\uff0c\u7b97\u6cd5\u5c06\u7ec8\u6b62\u540e\u7eed\u5206\u6790\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e24\u70b9\u6cd5\u4e0e\u4e94\u70b9\u6cd5\uff08LSA\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u83b7\u53d6\u79bb\u6563\u6570\u636e\u70b9\u540e\uff0cDSP\u5fc5\u987b\u4f9d\u9760\u5e95\u5c42\u6570\u5b66\u6a21\u578b\uff0c\u5c06\u590d\u6742\u7684\u6ce2\u5f62\u6ce2\u52a8\u8f6c\u6362\u4e3a\u7cbe\u786e\u7684\u201c\u635f\u8017\u201d\u503c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e24\u70b9\u6cd5\uff1a\u7edd\u5bf9\u6c34\u4f4d\u5dee<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f4\u63a5\u8bfb\u53d6\u70b9\u7684y\u5750\u6807 <math data-latex=\"A\"><semantics><mi>A<\/mi><annotation encoding=\"application\/x-tex\">A<\/annotation><\/semantics><\/math> \u548c <math data-latex=\"B\"><semantics><mi>B<\/mi><annotation encoding=\"application\/x-tex\">B<\/annotation><\/semantics><\/math> \u5e76\u8ba1\u7b97\u5176\u5dee\u503c\u3002\u8be5\u7b97\u6cd5\u5bf9\u9ad8\u9891\u566a\u58f0\u6781\u4e3a\u654f\u611f\uff1b\u5982\u679c\u91c7\u6837\u70b9\u6070\u597d\u843d\u5728\u566a\u58f0\u8c37\u5e95\uff0c\u8bef\u5dee\u5c31\u4f1a\u88ab\u653e\u5927\u3002\u5b83\u662f <strong>\u4e25\u7981<\/strong> \u7528\u4e8e\u5bf9\u5355\u4e2a\u63a5\u5934\u8fdb\u884c\u5fae\u6d4b\u91cf\uff0c\u4ec5\u9002\u7528\u4e8e\u8bc4\u4f30\u957f\u8fbe\u6570\u516c\u91cc\u7684\u5149\u7ea4\u6bb5\u7684\u5b8f\u89c2\u603b\u8870\u51cf\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e94\u70b9\u6cd5\/\u6700\u5c0f\u4e8c\u4e58\u903c\u8fd1\uff08LSA\uff09\uff1a\u6297\u566a\u58f0\u7ebf\u6027\u56de\u5f52<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u6d4b\u91cf\u63a5\u5934\/\u8fde\u63a5\u5668\u63d2\u5165\u635f\u8017\u7684\u884c\u4e1a\u9ec4\u91d1\u6807\u51c6\u3002\u8be5\u7b97\u6cd5\u5229\u75285\u4e2a\u6807\u8bb0\u70b9\uff0c\u5728\u4e8b\u4ef6\u53d1\u751f\u524d\u548c\u6b7b\u533a\u5c3e\u90e8\u4e4b\u540e\u5206\u522b\u786e\u5b9a\u4e24\u4e2a\u7eaf\u745e\u5229\u6563\u5c04\u533a\u95f4\u3002 DSP\u4ece\u8fd9\u4e24\u4e2a\u533a\u95f4\u4e2d\u63d0\u53d6\u6570\u767e\u4e2a\u6570\u636e\u70b9\u4ee5\u6267\u884c\u7ebf\u6027\u56de\u5f52\uff08LSA\uff09\uff0c\u62df\u5408\u4e24\u6761\u6700\u4f18\u76f4\u7ebf\uff0c\u5e76\u5c06\u5176\u6570\u5b66\u6295\u5f71\u81f3\u201c\u4e8b\u4ef6\u4e2d\u5fc3\u201d\u3002\u6700\u7ec8\u7684\u635f\u8017\u5373\u4e3a\u4e24\u6761\u7406\u60f3\u76f4\u7ebf\u5728\u4e2d\u5fc3\u5904\u7684\u622a\u8ddd\u4e4b\u5dee\u3002 <strong>\u7b97\u6cd5\u4ef7\u503c\uff1a<\/strong> \u5b83\u5728\u6570\u5b66\u4e0a\u5f7b\u5e95\u6d88\u9664\u4e86\u7531\u786c\u4ef6AFE\u9971\u548c\u6062\u590d\u5f15\u8d77\u7684\u201c\u6b7b\u533a\u5c3e\u6548\u5e94\u201d\u3002\u5728\u5904\u7406\u6a21\u5f0f\u573a\u76f4\u5f84\u4e0d\u540c\u7684\u5149\u7ea4\u63a5\u5934\u65f6\uff0c\u5b83\u8fd8\u80fd\u51c6\u786e\u63ed\u793a\u7269\u7406\u4e0a\u5e76\u4e0d\u5b58\u5728\u7684\u201c\u589e\u76ca\u201d\uff08\u4f2a\u589e\u76ca\uff09\u73b0\u8c61\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u590d\u6742PON\u7f51\u7edc\u7684\u7279\u6b8a\u53c2\u6570\u8c03\u5ea6<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u65e0\u6e90\u5149\u7f51\u7edc\uff08PON\uff09\u4e2d\uff0c1:N\u5149\u5206\u8def\u5668\u4f1a\u4ea7\u751f10dB\u81f322dB\u4e4b\u95f4\u7684\u5927\u5e45\u9636\u8dc3\u5f0f\u8870\u51cf\uff0c\u5bfc\u81f4\u4f20\u7edf\u7684\u53c2\u6570\u903b\u8f91\u5b8c\u5168\u5931\u6548\u3002.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u91cd\u5efaEOF\u9608\u503c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6807\u51c6\u7684 3dB EOF \u4f1a\u5c06\u5206\u8def\u5668\u8bef\u5224\u4e3a\u5149\u7ea4\u65ad\u88c2\u3002PON \u6a21\u5f0f\u5fc5\u987b\u5c06 EOF \u5f3a\u5236\u63d0\u5347\u81f3 25dB \u6216\u66f4\u9ad8\uff0c\u6216\u8005\u5b8c\u5168\u7981\u7528\u8be5\u53c2\u6570\uff0c\u8f6c\u800c\u4f9d\u9760\u53cd\u5c04\u5cf0\u503c\u4e0b\u65b9\u7684\u7edd\u5bf9\u566a\u58f0\u5e95\u9650\u6765\u786e\u5b9a\u94fe\u8def\u7ec8\u70b9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u591a\u8109\u51b2\u62fc\u63a5\u7b97\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5355\u4e2a\u8109\u51b2\u5bbd\u5ea6\u65e0\u6cd5\u540c\u65f6\u6ee1\u8db3\u5206\u8def\u5668\u524d\u540e\u4e24\u7aef\u7684\u6d4b\u8bd5\u9700\u6c42\u3002\u9ad8\u7aef\u667a\u80fd\u56fa\u4ef6\u4f1a\u5728\u540e\u53f0\u81ea\u52a8\u8fdb\u884c\u8c03\u5ea6\uff1a <strong>\u8d85\u7a84\u8109\u51b2<\/strong> \u7528\u4e8e\u8fd1\u7aef\u7cbe\u7ec6\u5b9a\u4f4d\uff08\u6d4b\u91cf\u8fde\u63a5\u5668\uff09\uff1b <strong>\u4e2d\u7b49\u5f3a\u5ea6\u8109\u51b2<\/strong> \u7528\u4e8e\u6982\u8ff0\u5b8f\u89c2\u6b65\u9aa4\uff1b\u4ee5\u53ca <strong>\u8d85\u5bbd\u8109\u51b2<\/strong> \u5229\u7528\u5de8\u5927\u7684\u80fd\u91cf\u5f3a\u884c\u7a7f\u900f\u5206\u5149\u5668\u3002\u968f\u540e\uff0cDSP \u57fa\u4e8e\u4fe1\u566a\u6bd4\uff08SNR\uff09\u7684\u4ea4\u53c9\u70b9\u8fdb\u884c\u52a0\u6743\u6570\u636e\u878d\u5408\u548c\u62fc\u63a5\uff0c\u4ece\u800c\u751f\u6210\u4e00\u6761\u517c\u5177\u9ad8\u5206\u8fa8\u7387\u548c\u9ad8\u7a7f\u900f\u529b\u7684\u865a\u62df\u5149\u8ff9\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6781\u503c\u6c42\u5e73\u5747\u4e0e\u52a8\u6001VGA\u63a7\u5236<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fe1\u53f7\u7a7f\u8fc7\u5206\u8def\u5668\u540e\uff0c\u8fdc\u7aef\u4fe1\u53f7\u5f3a\u5ea6\u901a\u5e38\u4f1a\u964d\u81f3-60dBm\u4ee5\u4e0b\uff0c\u56e0\u6b64\u9700\u8981\u5c06\u5e73\u5747\u65f6\u95f4\u5ef6\u957f\u81f33\u81f35\u5206\u949f\u3002 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class=\"wp-block-heading\">\u7ed3\u6784\u5316\u6a21\u5757\u8bbe\u8ba1<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u6587\u4ef6\u7531\u4ee5\u4e0b\u90e8\u5206\u7d27\u51d1\u5730\u7ec4\u6210\uff1a\u6620\u5c04\u5757\uff08\u76ee\u5f55\u5bfb\u5740\uff09\u3001\u901a\u7528\u53c2\u6570\u3001\u56fa\u5b9a\u53c2\u6570\uff08\u5c06\u8109\u51b2\u5bbd\u5ea6\u3001IOR\u3001BSC \u7b49\u4fdd\u5b58\u4e3a\u91cd\u5efa\u57fa\u51c6\uff09\u3001\u6570\u636e\u70b9\uff08\u539f\u59cb\u6ce2\u5f62\u5e8f\u5217\uff09\u4ee5\u53ca\u5173\u952e\u4e8b\u4ef6\uff08\u7531\u56fa\u4ef6\u6807\u8bc6\u7684\u6700\u7ec8\u4e8b\u4ef6\u8868\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u91cf\u5316\u4e0e\u7f29\u653e\u56e0\u5b50<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u538b\u7f29\u6587\u4ef6\u5927\u5c0f\uff0c\u5927\u89c4\u6a21\u7684\u5149\u529f\u7387\u70b9\u6570\u7ec4\u4e0d\u4f7f\u7528\u6d6e\u70b9\u6570\u3002\u53d6\u800c\u4ee3\u4e4b\u7684\u662f\uff0c\u5b83\u4eec\u4f7f\u7528\u201c\u5b9a\u70b9\u6574\u6570 + \u7f29\u653e\u56e0\u5b50\u201d\uff08\u4f8b\u5982\uff0c12.345dB \u7ecf\u7f29\u653e\u540e\u5b58\u50a8\u4e3a\u6574\u6570 12345\uff09\u3002 \u5728\u9ad8\u52a8\u6001\u6d4b\u8bd5\u4e0b\uff0c\u9ad8\u7aef\u5149\u65f6\u57df\u53cd\u5c04\u4eea\uff08OTDR\uff09\u5fc5\u987b\u5728\u534f\u8bae\u5934\u4e2d\u52a8\u6001\u58f0\u660e\u5207\u6362\u81f332\u4f4d\u7f16\u7801\uff0c\u4ee5\u9632\u6b62\u6574\u6570\u6ea2\u51fa\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e13\u6709\u533a\u5757\uff08\u9690\u85cf\u6269\u5c55\u540d\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5236\u9020\u5546\u53ef\u4ee5\u79d8\u5bc6\u5730\u5c06\u81ea\u5b9a\u4e49\u4ee3\u7801\u5757\u6ce8\u5165\u6587\u4ef6\u4e2d\u3002 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\u5b9a\u5236\u670d\u52a1\uff08\u6db5\u76d6\u6838\u5fc3\u7b97\u6cd5\u3001\u786c\u4ef6\u67b6\u6784\u8bbe\u8ba1\u4ee5\u53ca\u9488\u5bf9\u7279\u6b8a\u5de5\u51b5\u7684\u6d4b\u8bd5\u89e3\u51b3\u65b9\u6848\uff09\u3002\u5982\u9700\u6280\u672f\u54a8\u8be2\u6216\u5b9a\u5236\u670d\u52a1\uff0c\u6b22\u8fce\u968f\u65f6 <a href=\"https:\/\/firstfibertech.com\/zh\/%e8%81%94%e7%b3%bb%e6%88%91%e4%bb%ac\/\" data-type=\"page\" data-id=\"54\">\u8054\u7cfb\u6211\u4eec<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"578\" src=\"https:\/\/firstfibertech.com\/wp-content\/uploads\/2026\/09\/FirstFiber-Technologies-OTDR-PCB.webp\" alt=\"FirstFiber Technologies OTDR \u5370\u5237\u7535\u8def\u677f\" class=\"wp-image-3953\" srcset=\"https:\/\/firstfibertech.com\/wp-content\/uploads\/2026\/09\/FirstFiber-Technologies-OTDR-PCB.webp 1000w, https:\/\/firstfibertech.com\/wp-content\/uploads\/2026\/09\/FirstFiber-Technologies-OTDR-PCB-300x173.webp 300w, https:\/\/firstfibertech.com\/wp-content\/uploads\/2026\/09\/FirstFiber-Technologies-OTDR-PCB-768x444.webp 768w, https:\/\/firstfibertech.com\/wp-content\/uploads\/2026\/09\/FirstFiber-Technologies-OTDR-PCB-18x10.webp 18w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>\u5149\u65f6\u57df\u53cd\u5c04\u4eea\uff08OTDR\uff09\u901a\u8fc7\u6ce8\u5165\u5149\u8109\u51b2\u5e76\u5206\u6790\u5176\u540e\u5411\u6563\u5c04\u548c\u53cd\u5c04\u4fe1\u53f7\uff0c\u7ed8\u5236\u51fa\u5149\u7ea4\u94fe\u8def\u7684\u7269\u7406\u201c\u62d3\u6251\u56fe\u201d\u3002 \u4e3a\u4e86\u83b7\u5f97\u51c6\u786e\u7684\u6d4b\u8bd5\u66f2\u7ebf\uff0c\u5fc5\u987b\u6839\u636e\u88ab\u6d4b\u94fe\u8def\u7684\u5b9e\u9645\u7269\u7406\u7279\u6027\u7cbe\u786e\u914d\u7f6e\u5404\u9879\u53c2\u6570\u3002\u8bbe\u7f6eOTDR\u53c2\u6570\u672c\u8d28\u4e0a\u662f\u4e00\u9879\u7269\u7406\u2026\u2026 <a title=\"\u6838\u5fc3OTDR\u53c2\u6570\u7684\u7269\u7406\u673a\u5236\u53ca\u5e95\u5c42\u7b97\u6cd5\u903b\u8f91\" class=\"read-more\" href=\"https:\/\/firstfibertech.com\/zh\/blog\/physical-mechanisms-and-underlying-algorithm-logic-of-core-otdr-parameters\/\" aria-label=\"\u9605\u8bfb Physical Mechanisms and Underlying Algorithm Logic of Core OTDR Parameters\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[98],"tags":[],"class_list":["post-3912","post","type-post","status-publish","format-standard","hentry","category-otdr-wiki"],"_links":{"self":[{"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/posts\/3912","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/comments?post=3912"}],"version-history":[{"count":3,"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/posts\/3912\/revisions"}],"predecessor-version":[{"id":3954,"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/posts\/3912\/revisions\/3954"}],"wp:attachment":[{"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/media?parent=3912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/categories?post=3912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/firstfibertech.com\/zh\/wp-json\/wp\/v2\/tags?post=3912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}