fluke DSX-5000中TCL與ELTCTL是什麼意思│₪₪☁↟？測試不過怎麼辦│₪₪☁↟？

深圳市連訊達電子技術開發有限公司網路部工程師為大家介紹FLUKE測速裝置中TCL與ELTCTL兩個引數的意思·₪╃·↟。(PS:這是DTX-1800裡面沒有的引數）

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▩✘：測量是透過向雙絞線注入差模訊號（DM）✘•╃↟，然後測量同一對雙絞線返回的共模訊號（CM）·₪╃·↟。CM訊號返回的越少✘•╃↟，TCL引數就會越好✘•╃↟，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·₪╃·↟。回波損耗測試是透過向雙絞線注入DM（差模訊號）然後測試返回的DM訊號✘•╃↟，然而TCL是測試CM訊號·₪╃·↟。

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▩✘：對於ANSI/TIA-568-C.2現場測試要求直到ANSI/TIA-1152標準·₪╃·↟。在那個時候✘•╃↟，TCL並不是一個現場測試的要求✘•╃↟，因為沒有現場測試裝置供應商可以執行TCL現場測試✘•╃↟，直到DSX-5000電纜認證分析儀的誕生·₪╃·↟。預計其他品牌測試裝置廠家最終也將提供TCL現場測量·₪╃·↟。現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▩✘：如果需要對於Cat5e✘•╃↟，Cat6✘•╃↟，Cat 6A測試TCL和ELTCTL引數✘•╃↟，你只需要再DSX-5000 的資料夾下面找到+TCL的字尾就可以了·₪╃·↟。

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）字尾的預示著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 僅僅提供通道測試的極限值✘•╃↟，如果選擇永久鏈路測試✘•╃↟，TCL和ELTCTL也會被執行✘•╃↟，但是不會有透過/失敗的標準·₪╃·↟。同樣你也會看到工業乙太網標準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的餘量✘•╃↟，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·₪╃·↟。