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                            當前位置:首頁 ? 公司動態 » fluke DSX-5000中TCL與ELTCTL是什么意思?測試不過怎么辦?

                            fluke DSX-5000中TCL與ELTCTL是什么意思?測試不過怎么辦?

                            文章出處:深圳市連訊達電子技術開發有限公司 人氣:-發表時間:2014-09-20 10:45:00

                            深圳市連訊達電子技術開發有限公司網絡部工程師為大家介紹FLUKE測速設備中TCL與ELTCTL兩個參數的意思。(PS:這是DTX-1800里面沒有的參數)


                            transverse conversion loss  TCL 橫向變換損耗

                            transverse conversion transfer loss  TCTL 橫變換轉移損耗

                            TCL (Transverse Conversion Loss) – DSX CableAnalyzer TCL is one of two balance measurements found in ANSI/TIA-568-C.2, ANSI/TIA-1005 and ISO/IEC 11801:2010. The other is ELTCTL.



                            The measurement is made by injecting a differential mode signal (DM) into a twisted pair, then measuring the common mode signal (CM) returned on that same twisted pair. The smaller the CM signal returned, the better the TCL measurement (balance).

                             

                            翻譯:測量是通過向雙絞線注入差模信號(DM),然后測量同一對雙絞線返回的共模信號(CM)。CM信號返回的越少,TCL參數就會越好,越平衡。



                            If it looks similar to a Return Loss measurement, you're right. Except a Return Loss measurement is made by injecting a DM signal into the pair and measuring the DM signal returned. Here we are measuring the CM signal returned which is TCL.


                            翻譯:如果你覺得它像是回波損耗的測試,那你就說對了?;夭〒p耗測試是通過向雙絞線注入DM(差模信號)然后測試返回的DM信號,然而TCL是測試CM信號。


                            Field test requirements for ANSI/TIA-568-C.2 are deferred to ANSI/TIA-1152. At this time, TCL is not a field test requirement because until the DSX CableAnalyzer came along, no field test equipment vendor could perform a TCL field test. It is anticipated that other test equipment vendors will eventually offer TCL field measurements too. Field testers are normally capable of DM measurements only – the DSX CableAnalyzer is capable of both DM and CM measurements, hence its ability to measure TCL and ELTCTL.


                            翻譯:對于ANSI/TIA-568-C.2現場測試要求直到ANSI/TIA-1152標準。在那個時候,TCL并不是一個現場測試的要求,因為沒有現場測試設備供應商可以執行TCL現場測試,直到DSX-5000電纜認證分析儀的誕生。預計其他品牌測試設備廠家最終也將提供TCL現場測量?,F場測試人員通常僅能DM測量 – 對DSX-5000電纜認證分析儀能夠既DM和CM的測量,因此其有測量TCL與ELTCTL的能力。


                            If you wish to add TCL and ELTCTL to your standard Category 5e, 6, 6A or Class D, E or EA test, select your test limit under the folder in DSX called Balance Measurements and look for your test limit with a suffix of (+TCL):


                            翻譯:如果需要對于Cat5e,Cat6,Cat 6A測試TCL和ELTCTL參數,你只需要再DSX-5000 的文件夾下面找到+TCL的后綴就可以了。


                            This will add ≈ 6.6 seconds to your AUTOTEST time.

                            TCL測試將增加6.6秒測試時間。


                            The suffix of (+TCL) indicates a standard ANSI/TIA or ISO/IEC test with the addition of TCL and ELTCTLmeasurements. ANSI/TIA-568-C.2 and ISO/IEC 11801:2010 only provide test limits for Channel measurements at this time. If you select a Perm. Link test limit, the TCL and ELTCTL measurements will be performed, but there will be no PASS/FAIL criteria applied. You will also see the Industrial Ethernet standards TIA 1005 with the different E1, E2 and E3 environmental TCL and ELTCTL limits.


                            翻譯:有(+TCL)后綴的預示著ANSI/TIA或者ISO/IEC測試有這個規格。 目前ANSI/TIA-568-C.2 and ISO/IEC 11801:2010 僅僅提供信道測試的極限值,如果選擇永久鏈路測試,TCL和ELTCTL也會被執行,但是不會有通過/失敗的標準。同樣你也會看到工業以太網標準TIA 1005 ,E1,E2,E3的標準的限制。


                            In the example below from a DSX-5000 CableAnalyzer, a Category 6A Channel was tested. With a margin of 5.4 dB (6 dB is a factor of 2), you can feel confident that this link will perform well, even in a noisy environment.



                            翻譯:從下面DSX-5000的例子中可以看到,Cat 6A通道測試有5.4db的余量,你就不用擔心了,因為這條鏈路表現非常好。即使在有噪音的環境下。


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