{"id":530,"date":"2016-09-08T21:15:45","date_gmt":"2016-09-08T13:15:45","guid":{"rendered":"http:\/\/www.qtbuxian.com\/?p=530"},"modified":"2020-08-06T16:13:09","modified_gmt":"2020-08-06T08:13:09","slug":"%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84","status":"publish","type":"post","link":"http:\/\/www.qtbuxian.com\/?p=530","title":{"rendered":"\u5e38\u5fb7\u4e07\u8fbe\u8fea\u5361\u4fac\u516d\u7c7b\u94dc\u7f06\u6d4b\u8bd5\u662f\u600e\u6837\u5b8c\u6210\u7684"},"content":{"rendered":"<p>\u6458\u8981\uff1a<strong>\u7eaf\u4e00<\/strong><strong>.<\/strong><strong>\u5343\u901a\u5f31\u7535\u65bd\u5de5\u961f<\/strong>\u5b8c\u6210\u5e38\u5fb7\u4e07\u8fbe\u8fea\u5361\u4fac\u516d\u7c7b\u94dc\u7f06\u6d4b\u8bd5\u9879\u76ee<\/p>\n<p>\u6587\/\u5343\u901a\u7f51\u7edc\u5de5\u4f5c\u5ba4(\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u5343\u901a\u7f51\u7edc)<\/p>\n<p>2016\u5e748\u670830\u65e5\u65e9\u4e0a6:30\uff0c\u5343\u901a\u7f51\u7edc\u6280\u672f\u5de5\u7a0b\u5e08\u7eaf\u4e00\u5e26\u7740FLUKE 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href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/img_20160830_122251\/\" rel=\"attachment wp-att-544\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-544 size-medium aligncenter\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/IMG_20160830_122251-225x300.jpg\" alt=\"IMG_20160830_122251\" width=\"225\" height=\"300\" srcset=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/IMG_20160830_122251-225x300.jpg 225w, http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/IMG_20160830_122251-768x1024.jpg 768w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/img_20160830_122223\/\" rel=\"attachment wp-att-542\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-542 size-medium aligncenter\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/IMG_20160830_122223-225x300.jpg\" alt=\"IMG_20160830_122223\" width=\"225\" height=\"300\" srcset=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/IMG_20160830_122223-225x300.jpg 225w, http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/IMG_20160830_122223-768x1024.jpg 768w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a><\/p>\n<p>\u4e00\u4e2a\u70b9\u7684\u94dc\u7f06\u6d4b\u8bd5\u62a5\u544a\uff0c\u5e76\u7b80\u8981\u89e3\u91ca\u4e0b\u8fd9\u4e9b\u6570\u636e\u3002<\/p>\n<p><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/ap01\/\" rel=\"attachment wp-att-538\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-538 size-medium\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/ap01-238x300.jpg\" alt=\"ap01\" width=\"238\" height=\"300\" srcset=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/ap01-238x300.jpg 238w, http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/ap01.jpg 467w\" sizes=\"auto, (max-width: 238px) 100vw, 238px\" \/><\/a><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/attachment\/555555\/\" rel=\"attachment wp-att-534\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-534 size-full\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/555555.png\" alt=\"555555\" width=\"286\" height=\"121\" \/><\/a><\/p>\n<p>1.\u957f\u5ea6Length<\/p>\n<p>\u5404\u4e2a\u6d4b\u8bd5\u6a21\u578b\u6240\u89c4\u5b9a\u7684\u957f\u5ea6\u4e0d\u4e00\u6837\uff0c\u57fa\u672c\u4e0a\u9075\u5faa\u4e86\u4ee5\u592a\u7f51\u7684\u8bbf\u95ee\u673a\u5236CSMA\/CD(\u8f7d\u6ce2\u4fa6\u542c\u591a\u8def\u76d1\u6d4b\/\u78b0\u649e\u68c0\u6d4b)\uff0c\u4ee5\u4e0b\u4e3a\u5404\u4e2a\u6807\u51c6\u6240\u89c4\u5b9a\u957f\u5ea6\u7684\u60c5\u51b5\uff1aBasic Link\u57fa\u672c\u94fe\u8def\uff1a\u957f\u5ea6\u6781\u9650\u4e3a90\u7c73\uff0c\u5176\u4e2d\u5305\u62ec\u4e86\u4e24\u7aef\u7684\u6d4b\u8bd5\u8df3\u7ebf\u3002Permanent Link\u6c38\u4e45\u94fe\u8def\uff1a\u957f\u5ea6\u6781\u9650\u4e3a94\u7c73\uff0c\u5305\u62ec\u4e86\u4e24\u7aef\u7684\u6d4b\u8bd5\u8df3\u7ebf\u3002Channel Link\u901a\u9053\u94fe\u8def\uff1a\u957f\u5ea6\u6781\u9650\u4e3a100\u7c73\uff0c\u5305\u62ec\u4e86\u4e24\u7aef\u7684\u6d4b\u8bd5\u8df3\u7ebf\u3001\u94fe\u8def\u4e2d\u7684\u8f6c\u63a5\u548c\u4fe1\u606f\u6a21\u5757\u3002<strong>\u672c\u6761\u7ebf\u7f06\u957f\u5ea6\uff08\u4ee5\u7ebf\u5bf945\u4e3a\u51c6\uff09\u4e3a198ft,\u6ce8\u610f\uff0c\u7531\u4e8e\u6d4b\u8bd5\u65f6\u6ca1\u6709\u8bbe\u7f6e\u957f\u5ea6\u663e\u793a\u5355\u4f4d\u4e3a\u7c73\uff0c\u6240\u4ee5\u9ed8\u8ba4\u5355\u4f4d\u4e3a\u82f1\u5bf8\u3002<\/strong><\/p>\n<p>2.\u4f20\u8f93\u65f6\u5ef6Propagation Delay<\/p>\n<p>\u5373\u4fe1\u53f7\u5728\u6bcf\u5bf9\u94fe\u8def\u4e0a\u4f20\u8f93\u7684\u65f6\u95f4\uff0c\u7528ns\u8868\u793a\u3002\u4e00\u822c\u6781\u9650\u503c\u4e3a555ns\u3002\u5982\u679c\u4f20\u8f93\u65f6\u5ef6\u504f\u5927\uff0c\u4f1a\u9020\u6210\u5ef6\u8fdf\u78b0\u649e\u589e\u591a\u3002<strong>\u672c\u6761\u7ebf\u7f06\u768412\u7ebf\u5bf9\u7684\u4f20\u8f93\u65f6\u5ef6\u4e3a308ns.<\/strong><\/p>\n<p>3.\u65f6\u5ef6\u504f\u79bbDelay Skew<\/p>\n<p>\u5373\u4fe1\u53f7\u5728\u7ebf\u5bf9\u4e0a\u4f20\u8f93\u65f6\u65f6\u5ef6\u6700\u5c0f\u548c\u6700\u5927\u7684\u5dee\u503c\uff0c\u7528ns\u8868\u793a\uff0c\u4e00\u822c\u8303\u56f4\u572850ns\u4ee5\u5185\u3002\u3002\u5728\u5343\u5146\u7f51\u4e2d\uff0c\u7531\u4e8e\u53ef\u80fd\u4f7f\u7528\u56db\u5bf9\u7ebf\u4f20\u8f93\uff0c\u4e14\u4e3a\u5168\u53cc\u5de5\uff0c\u90a3\u4e48\u5728\u6570\u636e\u53d1\u9001\u65f6\uff0c\u91c7\u7528\u4e86\u5206\u7ec4\u4f20\u8f93\uff0c\u5373\u5c06\u6570\u636e\u62c6\u5206\u6210\u82e5\u5e72\u4e2a\u6570\u636e\u5305\uff0c\u6309\u4e00\u5b9a\u987a\u5e8f\u5206\u914d\u5230\u56db\u5bf9\u7ebf\u4e0a\u8fdb\u884c\u4f20\u8f93\uff0c\u800c\u5728\u63a5\u6536\u65f6\uff0c\u53c8\u6309\u7167\u53cd\u5411\u987a\u5e8f\u5c06\u6570\u636e\u91cd\u65b0\u7ec4\u5408\uff0c\u5982\u679c\u5ef6\u65f6\u504f\u79bb\u8fc7\u5927\uff0c\u90a3\u4e48\u52bf\u5fc5\u9020\u6210\u4f20\u8f93\u5931\u8d25\u3002<strong>\u672c\u6761\u7ebf\u7f06\u7684\u65f6\u5ef6\u504f\u79bb\u4e3a17ns.<\/strong><\/p>\n<p>4.\u63d2\u5165\u635f\u8017\uff08IL\uff09<\/p>\n<p>\u63d2\u5165\u635f\u8017\u4e5f\u5c31\u662f\u4ee5\u524d\u7ebf\u7f06\u8ba4\u8bc1\u7684\u6982\u5ff5\u8870\u51cf\uff0c\u94fe\u8def\u4e2d\u4f20\u8f93\u6240\u9020\u6210\u7684\u4fe1\u53f7\u635f\u8017(\u4ee5\u5206\u8d1ddB\u8868\u793a)\u3002\u4e00\u822c\u9020\u6210\u8870\u51cf\u7684\u539f\u56e0\u4e3a\uff1a\u7535\u7f06\u6750\u6599\u7684\u7535\u6c14\u7279\u6027\u548c\u7ed3\u6784\u3001\u4e0d\u6070\u5f53\u7684\u7aef\u63a5\u3001\u963b\u6297\u4e0d\u5339\u914d\u5f62\u6210\u7684\u53cd\u5c04\u3002\u5982\u679c\u8870\u51cf\u8fc7\u5927\uff0c\u5b83\u4f1a\u9020\u6210\u4f7f\u7535\u7f06\u94fe\u8def\u4f20\u8f93\u6570\u636e\u4e0d\u53ef\u9760\u3002\u8870\u51cf\u968f\u7740\u6e29\u5ea6\u548c\u9891\u7387\u7684\u589e\u52a0\u800c\u589e\u52a0\u3002\u9ad8\u9891\u4fe1\u53f7\u6bd4\u4f4e\u9891\u4fe1\u53f7\u8870\u51cf\u5f97\u66f4\u4e25\u91cd\u3002<strong>\u672c\u6761\u7ebf\u7f0636\u7ebf\u5bf9\u63d2\u5165\u635f\u8017\u4e3a16.8db\u3002<\/strong><\/p>\n<p>\u4e0b\u9762\u7684\u53c2\u6570\u4e0d\u540c\u7684\u7684\u7ebf\u5bf9\u6709\u4e0d\u540c\u7684\u503c\uff0c\u800c\u4e14\u662f\u968f\u7740\u9891\u7387\u7684\u4e0d\u540c\u800c\u4e0d\u540c\uff0c\u8868\u683c\u91cc\u5217\u51fa\u4e86\u4e24\u7ec4\u6570\u636e\uff0c\u6570\u636e\u4ee5\u7ebf\u7f064\u5bf9\u53cc\u7ede\u7ebf\u6700\u5dee\u7684\u90a3\u4e00\u5bf9\u4e3a\u51c6\uff0c\u4e00\u7ec4\u6570\u636e\u662f\u6700\u5dee\u4f59\u91cf\u7684\u90a3\u4e2a\u503c\uff0c\u8868\u793a\u548c\u89c4\u5b9a\u7684\u6807\u51c6\u6700\u63a5\u8fd1\u7684\u90a3\u4e2a\u503c\uff0c\u53e6\u4e00\u7ec4\u6570\u636e\u662f\u6700\u5dee\u503c\uff0c\u8868\u793a\u8fd9\u4e2a\u53c2\u6570\u6700\u5dee\u7684\u90a3\u4e2a\u503c\u3002\u8868\u683c\u4e2d\u7684SR\u7684\u610f\u601d\u662f\u8fdc\u7aef\u3002<\/p>\n<p><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/next11111111\/\" rel=\"attachment wp-att-539\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-539 size-full aligncenter\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/Next11111111.png\" alt=\"Next11111111\" width=\"282\" height=\"117\" \/><\/a><\/p>\n<p>1.\u8fd1\u7aef\u4e32\u97f3\uff08NEXT \uff09<\/p>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td>\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7531\u4e8e\u6bcf\u5bf9\u53cc\u7ede\u7ebf\u4e0a\u90fd\u6709\u7535\u6d41\u6d41\u8fc7\uff0c\u6709\u7535\u6d41\u5c31\u4f1a\u5728\u7ebf\u7f06\u9644\u8fd1\u9020\u6210\u78c1\u573a\uff0c\u4e3a\u4e86\u5c3d\u91cf\u62b5\u6d88\u7ebf\u4e0e\u7ebf\u4e4b\u95f4\u7684\u78c1\u573a\u5e72\u6270\uff0c\u5305\u62ec\u4e86\u62b5\u6d88\u8fd1\u573a\u4e0e\u8fdc\u573a\u7684\u5f71\u54cd\uff0c\u8fbe\u5230\u5e73\u8861\u7684\u76ee\u7684\uff0c\u6240\u4ee5\u628a\u540c\u4e00\u7ebf\u5bf9\u8fdb\u884c\u53cc\u7ede,\u4f46\u662f\u5728\u505a\u6c34\u6676\u5934\u65f6\u5fc5\u987b\u628a\u53cc\u7ede\u62c6\u5f00\uff0c\u8fd9\u6837\u5c31\u4f1a\u9020\u62101\u30012\u7ebf\u5bf9\u7684\u4e00\u90e8\u5206\u4fe1\u53f7\u6cc4\u6f0f\u51fa\u6765\uff0c\u88ab3\u30016\u7ebf\u5bf9\u6240\u63a5\u53d7\u5230\uff0c\u6cc4\u6f0f\u4e0b\u6765\u7684\u4fe1\u53f7\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u4e32\u97f3\u6216\u4e32\u6270\uff0c\u56e0\u4e3a\u53d1\u751f\u5728\u4fe1\u53f7\u53d1\u9001\u7684\u8fd1\u7aef\uff0c\u6240\u4ee5\u53eb\u505a\u8fd1\u7aef\u4e32\u6270\uff0c\u82f1\u6587\u53eb\u505aNear End Cross Talk(NEXT)\u3002<strong>\u672c\u6761\u7ebf\u7f06\u6700\u5dee\u4f59\u91cf\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a10.0db,\u8fdc\u7aef\u4e3a11.8db,\u6700\u5dee\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a10.3db,\u8fdc\u7aef\u4e3a13.7db.<\/strong><\/p>\n<p><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/attachment\/1111\/\" rel=\"attachment wp-att-531\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-531 size-medium\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/1111-300x95.jpg\" alt=\"1111\" width=\"300\" height=\"95\" srcset=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/1111-300x95.jpg 300w, http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/1111.jpg 448w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>2.\u8fd1\u7aef\u4e32\u97f3\u529f\u7387\u548c\uff08PS\u00a0 NEXT\uff09<\/p>\n<p>\u8fd1\u7aef\u4e32\u97f3\u662f\u4e00\u5bf9\u53d1\u9001\u4fe1\u53f7\u7684\u7ebf\u5bf9\u5bf9\u88ab\u6d4b\u7ebf\u5bf9\u5728\u8fd1\u7aef\u7684\u4e32\u6270\uff0c\u5b9e\u9645\u4e0a\uff0c\u57284\u5bf9\u53cc\u7ede\u7ebf\u7535\u7f06\u4e2d\uff0c\u5f53\u5176\u4ed63\u4e2a\u7ebf\u5bf9\u90fd\u53d1\u9001\u4fe1\u53f7\u65f6\u4e5f\u4f1a\u5bf9\u88ab\u6d4b\u7ebf\u5bf9\u4ea7\u751f\u4e32\u6270\u3002\u56e0\u6b64\u57284\u5bf9\u7535\u7f06\u4e2d\uff0c3\u4e2a\u53d1\u9001\u4fe1\u53f7\u7684\u7ebf\u5bf9\u5411\u53e6\u4e00\u76f8\u90bb\u63a5\u6536\u7ebf\u5bf9\u4ea7\u751f\u7684\u603b\u4e32\u6270\u5c31\u79f0\u4e3a\u8fd1\u7aef\u4e32\u97f3\u529f\u7387\u548c\uff08Power Sum NEXT\uff0cPS NEXT\uff09\uff0c\u5b83\u53ef\u79f0\u4e3a\u7efc\u5408\u8fd1\u7aef\u4e32\u6270\u3002<strong>\u672c\u6761\u7ebf\u7f06\u6700\u5dee\u4f59\u91cf\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a10.0db,\u8fdc\u7aef\u4e3a13.7db,\u6700\u5dee\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a10.1db,\u8fdc\u7aef\u4e3a16.5db.<\/strong><\/p>\n<p><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/attachment\/2222\/\" rel=\"attachment wp-att-532\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-532 size-medium\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/2222-300x159.jpg\" alt=\"2222\" width=\"300\" height=\"159\" srcset=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/2222-300x159.jpg 300w, http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/2222-500x266.jpg 500w, http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/2222.jpg 553w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/acr-n\/\" rel=\"attachment wp-att-537\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-537 size-full\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/ACR-N.png\" alt=\"ACR-N\" width=\"283\" height=\"117\" \/><\/a><\/p>\n<p>1.\u8870\u51cf\u4e32\u6270\u6bd4\uff08ACR-N\u6216ACR\uff09<\/p>\n<p>\u901a\u4fe1\u94fe\u8def\u5728\u4fe1\u53f7\u4f20\u8f93\u65f6\uff0c\u4fe1\u53f7\u8870\u51cf\u548c\u4e32\u6270\u90fd\u4f1a\u5b58\u5728\uff0c\u4e32\u6270\u53cd\u6620\u51fa\u7535\u7f06\u7cfb\u7edf\u5185\u7684\u566a\u58f0\u6c34\u5e73\uff0c\u8870\u51cf\u53cd\u6620\u7ebf\u5bf9\u672c\u8eab\u7684\u5b9e\u9645\u4f20\u8f93\u80fd\u91cf\u603b\u7684\u5e0c\u671b\u5f53\u7136\u662f\u63a5\u6536\u5230\u7684\u4fe1\u53f7\u80fd\u91cf\u5c3d\u91cf\u5927\uff08\u5373\u7535\u7f06\u7684\u8870\u51cf\u503c\u8981\u5c0f\uff09\uff0c\u8026\u5408\u8fc7\u6765\u7684\u4e32\u97f3\u5c3d\u91cf\u5c0f\u3002\u6211\u4eec\u7528\u5b83\u4eec\u7684\u6bd4\u503c\u6765\u76f8\u5bf9\u8861\u91cf\u6536\u5230\u4fe1\u53f7\u7684\u8d28\u91cf\uff0c\u8fd9\u79cd\u6bd4\u503c\u5c31\u53eb\u4fe1\u566a\u6bd4\u3002\u5b83\u53ef\u4ee5\u53cd\u6620\u51fa\u7535\u7f06\u94fe\u8def\u7684\u5b9e\u9645\u4f20\u8f93\u8d28\u91cf\uff0c\u901a\u8fc7\u8ba1\u7b97\u6211\u4eec\u53d1\u73b0\uff0c\u4fe1\u566a\u6bd4\u5c31\u662f\u8870\u51cf\u4e32\u97f3\u6bd4\u3002\u8870\u51cf\u4e32\u97f3\u6bd4\uff08ACR\uff0cACR-N\uff0c\u4e5f\u53ef\u4ee5\u8bd1\u4e3a\u8870\u51cf\u4e32\u6270\u6bd4\uff09\u5b9a\u4e49\u4e3a\u88ab\u6d4b\u7ebf\u5bf9\u53d7\u76f8\u90bb\u53d1\u9001\u7ebf\u5bf9\u4e32\u6270\u7684\u8fd1\u7aef\u4e32\u97f3\u4e0e\u672c\u7ebf\u5bf9\u4e0a\u4f20\u8f93\u7684\u6709\u7528\u4fe1\u53f7\u7684\u6bd4\u503c\uff0c\u7528\u5bf9\u6570\u6765\u8868\u793a\u8fd9\u79cd\u6bd4\u503c\uff08\u9664\u6cd5\uff09\u5c31\u662f\u505a\u51cf\u6cd5\uff08\u5355\u4f4d\u4e3adB\uff09\uff0c\u5373<\/p>\n<p>ACR=NEXT\uff0dA\u00a0\u00a0\u00a0 (NEXT\u4e3a\u8fd1\u7aef\u4e32\u7ed5\uff0cA\u4e3a\u8870\u51cf\uff0c\u5373\u63d2\u5165\u635f\u8017)<\/p>\n<p>\u4e00\u5bf9\u7ebf\u5bf9\u611f\u5e94\u5230\u7684\u6cc4\u6f0f\u7684\u4fe1\u53f7(NEXT)\u4e0e\u9884\u671f\u63a5\u53d7\u7684\u6b63\u5e38\u7684\u7ecf\u8fc7\u8870\u51cf\u7684\u4fe1\u53f7(Attenuation)\u7684\u6bd4\u8f83\uff0c\u6700\u540e\u7684\u503c\u5e94\u8be5\u662f\u8d8a\u5927\u8d8a\u597d\u3002\u4f8b\u5982\u6709\u4e00\u4f4d\u8bb2\u5e08\u5728\u6559\u5e08\u7684\u524d\u9762\u8bb2\u8bfe\u3002\u8bb2\u5e08\u7684\u76ee\u6807\u662f\u8981\u5b66\u5458\u80fd\u591f\u542c\u6e05\u695a\u4ed6\u7684\u53d1\u8a00\u3002\u8bb2\u5e08\u7684\u97f3\u91cf\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u56e0\u7d20\uff0c\u4f46\u662f\u66f4\u91cd\u8981\u7684\u662f\u8bb2\u5e08\u7684\u97f3\u91cf\u548c\u80cc\u666f\u566a\u58f0\u95f4\u7684\u5dee\u522b\u3002\u5982\u679c\u8bb2\u5e08\u5b9e\u5728\u5b89\u9759\u7684\u56fe\u4e66\u9986\u4e2d\u53d1\u8a00\uff0c\u5373\u4f7f\u662f\u4f4e\u58f0\u7ec6\u8bed\u4e5f\u80fd\u542c\u5230\u3002\u60f3\u8c61\u4e00\u4e0b\uff0c\u5982\u679c\u540c\u4e00\u4e2a\u8bb2\u5e08\u4ee5\u540c\u6837\u7684\u97f3\u91cf\u5728\u70ed\u95f9\u7684\u8db3\u7403\u573a\u5185\u53d1\u8a00\u4f1a\u662f\u600e\u6837\u7684\u60c5\u51b5\u3002\u8bb2\u5e08\u5c06\u4e0d\u5f97\u4e0d\u63d0\u9ad8\u4ed6\u7684\u97f3\u91cf\uff0c\u8fd9\u6837\u4ed6\u7684\u58f0\u97f3\uff08\u6240\u9700\u4fe1\u53f7\uff09\u4e0e\u4eba\u7fa4\u7684\u6b22\u547c\u58f0\uff08\u80cc\u666f\u566a\u58f0\uff09\u7684\u5dee\u522b\u624d\u80fd\u5927\u5230\u88ab\u542c\u89c1\u3002<strong>\u672c\u6761\u7ebf\u7f06\u6700\u5dee\u4f59\u91cf\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a11.9db,\u8fdc\u7aef\u4e3a13.9db,\u6700\u5dee\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a26.7db,\u8fdc\u7aef\u4e3a32.0db.<\/strong><\/p>\n<p>2.\u8870\u51cf\u4e32\u97f3\u6bd4\u529f\u7387\u548c\uff08PS ACR-N\uff09\u6216ACR \u529f\u7387\u548c(PS ACR)<\/p>\n<p>\u5e03\u7ebf\u7cfb\u7edf\u6c38\u4e45\u94fe\u8def\u6216CP\u94fe\u8def\u6bcf\u4e00\u7ebf\u5bf9\u548c\u5e03\u7ebf\u4e24\u7aef\u7684PS ACR \u503c\u53ef\u7528\u4ee5\u4e0b\u8ba1\u7b97\u516c\u5f0f\u8fdb\u884c\u8ba1\u7b97\uff0c\u5e76\u53ef\u53c2\u8003\u9891\u7387\u7684PS ACR \u5efa\u8bae\u503c\u3002<\/p>\n<p>\u7ebf\u5bf9k \u7684PS ACR \u503c\u8ba1\u7b97\u516c\u5f0f\uff1a<\/p>\n<p>PS ACR<sub>k<\/sub>=PS NEXT<sub>k<\/sub>\u2014Il<sub>k\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/sub><\/p>\n<p>\u5f0f\u4e2d\u00a0\u00a0\u00a0\u00a0 k\u2014\u2014\u7ebf\u5bf9\u53f7\uff1b<\/p>\n<p>PS NEXT<sub>k<\/sub>\u2014\u2014\u7ebf\u5bf9k \u7684\u8fd1\u7aef\u4e32\u97f3\u529f\u7387\u548c\uff1b\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0IL<sub>k<\/sub>\u2014\u2014\u7ebf\u5bf9k \u7684\u63d2\u5165\u635f\u8017\u3002<\/p>\n<p><strong>\u672c\u6761\u7ebf\u7f06\u6700\u5dee\u4f59\u91cf\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a11.9db,\u8fdc\u7aef\u4e3a15.7db,\u6700\u5dee\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a30.1db,\u8fdc\u7aef\u4e3a33.1db.<\/strong><\/p>\n<p><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/acr-ffffff\/\" rel=\"attachment wp-att-536\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-536 size-full\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/acr-FFFFFf.png\" alt=\"acr-FFFFFf\" width=\"279\" height=\"118\" \/><\/a><\/p>\n<p>1.\u7b49\u7535\u5e73\u8fdc\u7aef\u4e32\u97f3\uff08ELFEXT\u6216ACR-F\uff09<\/p>\n<p>\u4e0e\u8fd1\u7aef\u4e32\u97f3\u5b9a\u4e49\u76f8\u7c7b\u4f3c\uff0c\u8fdc\u7aef\u4e32\u97f3\uff08FEXT\uff09\u662f\u4fe1\u53f7\u4ece\u8fd1\u7aef\u53d1\u51fa\uff0c\u800c\u5728\u94fe\u8def\u7684\u53e6\u4e00\u6d4b\uff08\u8fdc\u7aef\uff09\uff0c\u53d1\u9001\u4fe1\u53f7\u7684\u7ebf\u5bf9\u5411\u5176\u540c\u4fa7\u5176\u4ed6\u76f8\u90bb\uff08\u63a5\u6536\uff09\u7ebf\u5bf9\u901a\u8fc7\u7535\u78c1\u611f\u5e94\u8026\u5408\u800c\u6210\u7684\u4e32\u6270\u3002\u56e0\u4e3a\u4fe1\u53f7\u7684\u5f3a\u5ea6\u4e0e\u5b83\u6240\u4ea7\u751f\u7684\u4e32\u6270\u53ca\u4fe1\u53f7\u7684\u8870\u51cf\u6709\u5173\uff0c\u6240\u4ee5\u7535\u7f06\u957f\u5ea6\u5bf9\u6d4b\u91cf\u5230\u7684\u8fdc\u7aef\u4e32\u97f3\u635f\u8017\u5f71\u5411\u5f88\u5927\uff0c\u8fdc\u7aef\u4e32\u97f3\u5e76\u4e0d\u662f\u4e00\u79cd\u5f88\u6709\u6548\u7684\u6d4b\u8bd5\u6307\u6807\uff0c\u5728\u6d4b\u91cf\u4e2d\uff0c\u7528\u7b49\u7535\u5e73\u8fdc\u7aef\u4e32\u97f3\u503c\u7684\u6d4b\u91cf\u4ee3\u66ff\u8fdc\u7aef\u4e32\u97f3\u503c\u7684\u6d4b\u91cf\u3002<\/p>\n<p>ELFEXT\u7684\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n<p>ELFEXT=FEXT\uff0dA\uff08A\u4e3a\u88ab\u5e72\u6270\u7ebf\u5bf9\u7684\u8870\u51cf\u503c\uff0c\u73b0\u7528\u63d2\u5165\u635f\u8017IL\u8868\u793a\uff09<\/p>\n<p><strong>\u672c\u6761\u7ebf\u7f06\u6700\u5dee\u4f59\u91cf\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a17.7db,\u8fdc\u7aef\u4e3a17.2db,\u6700\u5dee\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a18.0db,\u8fdc\u7aef\u4e3a17.5db.<\/strong><\/p>\n<p><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/attachment\/9999\/\" rel=\"attachment wp-att-533\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-533 size-medium\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/9999-300x164.png\" alt=\"9999\" width=\"300\" height=\"164\" srcset=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/9999-300x164.png 300w, http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/9999-500x274.png 500w, http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/9999.png 745w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>2.\u7b49\u7535\u5e73\u8fdc\u7aef\u4e32\u97f3\u529f\u7387\u548c\uff08PSELFEXT\u6216PS ACR-F\uff09<\/p>\n<p>\u7b49\u7535\u5e73\u8fdc\u7aef\u4e32\u97f3\u529f\u7387\u548c\uff08PSELFEXT\u6216PS ACR-F\uff0c\u4e5f\u53ef\u4ee5\u8bd1\u4e3a\u7efc\u5408\u7b49\u6548\u8fdc\u7aef\u4e32\u6270\uff09\u662f\u51e0\u4e2a\u540c\u65f6\u4f20\u8f93\u4fe1\u53f7\u7684\u7ebf\u5bf9\u5728\u63a5\u6536\u7ebf\u5bf9\u5f62\u6210\u7684ELFEXT\u603b\u548c\uff0c\u662f\u76f8\u5bf9\u4e8e\u8870\u51cf\u7684FEXT(FEXT-attenuation)\uff0c\u7b49\u7535\u5e73\u8fdc\u7aef\u4e32\u97f3\u529f\u7387\u548c\u662f\u4e00\u4e2a\u8ba1\u7b97\u53c2\u6570\uff0c\u5bf94\u5bf9UTP\u800c\u8a00\uff0c\u5b83\u662f\u5176\u4ed63\u5bf9\u8fdc\u7aef\u4e32\u97f3\u5bf9\u7b2c4\u5bf9\u7ebf\u5bf9\u7684\u8054\u5408\u5e72\u6270\uff0c\u67098\u79cd\u5e72\u6270\u7ec4\u5408\u3002<\/p>\n<p><strong>\u672c\u6761\u7ebf\u7f06\u6700\u5dee\u4f59\u91cf\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a19.2db,\u8fdc\u7aef\u4e3a18.6db,\u6700\u5dee\u503c\u7684\u4e00\u7ec4\u6570\u636e\u8fd1\u7aef\u4e3a19.4db,\u8fdc\u7aef\u4e3a20.2db.<\/strong><\/p>\n<p><a href=\"http:\/\/www.qtbuxian.com\/%e5%b8%b8%e5%be%b7%e4%b8%87%e8%be%be%e8%bf%aa%e5%8d%a1%e4%be%ac%e5%85%ad%e7%b1%bb%e9%93%9c%e7%bc%86%e6%b5%8b%e8%af%95%e6%98%af%e6%80%8e%e6%a0%b7%e5%ae%8c%e6%88%90%e7%9a%84\/rl\/\" rel=\"attachment wp-att-540\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-540 size-full\" src=\"http:\/\/www.qtbuxian.com\/wp-content\/uploads\/2016\/09\/RL.png\" alt=\"RL\" width=\"280\" height=\"70\" \/><\/a><\/p>\n<p>1.\u56de\u6ce2\u635f\u8017Return Loss<\/p>\n<p>\u56de\u6ce2\u635f\u8017\uff08Return 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