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                                                                                                                                                                                                              文章詳情

                                                                                                                                                                                                              為啥短跳線DSX8000測試正常,DSX5000檢測無長度顯示

                                                                                                                                                                                                              日期:2022-07-25 12:43
                                                                                                                                                                                                              瀏覽次數:0
                                                                                                                                                                                                              摘要:據客戶反饋,他們生產的跳線,可以過DSX-8000線纜認證測試儀,但是無法過DSX-5000線纜測試儀?這到底是何種原因導致的呢? 實測圖見下: 從上圖我們可以看出,各個參數都有,唯獨沒有長度顯示。 同一條線使用DTX-1800測試或者DSX-8000都可以顯示其長度。 這是為什么呢? 因為沒有官方案例,只能依靠個人經驗來判定,估計是因為環路電阻不平衡或者偏大導致。怎樣才能改善其環路電阻的大小呢?水晶頭和線纜的阻抗匹配度不好,是其*有可能的原因。 接下來重新打水晶頭。果不其然看一下的測試 ...
                                                                                                                                                                                                              據客戶反饋,他們生產的跳線,可以過DSX-8000線纜認證測試儀,但是無法過DSX-5000線纜測試儀?這到底是何種原因導致的呢?

                                                                                                                                                                                                              實測圖見下:
                                                                                                                                                                                                              從上圖我們可以看出,各個參數都有,唯獨沒有長度顯示。

                                                                                                                                                                                                              同一條線使用DTX-1800測試或者DSX-8000都可以顯示其長度。

                                                                                                                                                                                                              這是為什么呢?
                                                                                                                                                                                                              因為沒有官方案例,只能依靠個人經驗來判定,估計是因為環路電阻不平衡或者偏大導致。怎樣才能改善其環路電阻的大小呢?水晶頭和線纜的阻抗匹配度不好,是其*有可能的原因。

                                                                                                                                                                                                              接下來重新打水晶頭。果不其然看一下的測試
                                                                                                                                                                                                              結論:水晶頭和線纜的阻抗匹配不平衡導致。兩者的采樣點估計也不一樣。
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