1、 TIA STANDARD ANSI/TIA-568-B.2-9-2005Approved: September 14, 2005 Commercial Building Telecommunications Cabling Standard Part 2 - Balanced Twisted-Pair Cabling Components Addendum 9 Additional Category 6 Balance Requirements and Measurement Procedures TIA-568-B.2-9 (Addendum No.9 to TIA-568-B.2) Fe
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25、NS. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.2-9 i ADDITIONAL CATEGORY 6 BALANCE REQUIREMENTS AND MEASUREMENT PROCEDURES TABLE OF CONTENTS 1 INTRODUCTION.1 2 PU
26、RPOSE AND SCOPE.1 3 DEFINITIONS & ACRONYMS 1 3.1 Definitions . 1 3.2 Acronyms and abbreviations. 1 4 BALANCE1 4.1 Transverse conversion loss (TCL) 2 4.1.1 Cable TCL 2 4.1.2 Connecting hardware TCL. 3 4.2 Transverse conversion transfer loss (TCTL) 3 4.2.1 Cable equal level transverse conversion trans
27、fer loss (ELTCTL). 4 4.2.2 Connecting hardware TCTL. 5 Annex A Cable and connecting hardware balance measurement procedures (normative) 6 A.1 General .6 A.2 Cable balance measurements6 A.3 Connecting hardware balance measurements.6 A.4 TCL calibration and measurement .6 A.4.1 TCL calibration 6 A.4.2
28、 TCL measurement. 8 A.5 TCTL calibration and measurement .10 A.5.1 TCTL calibration . 10 A.5.2 TCTL measurement 11 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.2-9
29、ii LIST OF FIGURES Figure A.1 Coaxial lead through calibration . 6 Figure A.2 Back-to-back balun insertion loss measurement 7 Figure A.3 Output terminal connection.7 Figure A.4 Outer shield grounding position 8 Figure A.5 Network analyzer test setup for measuring TCL 9 Figure A.6 Network analyzer te
30、st setup for measuring TCTL 10 LIST OF TABLES Table 1 Category 6 cable TCL . 2 Table 2 Category 6 connecting hardware TCL 3 Table 3 Category 6 cable ELTCTL.4 Table 4 Category 6 cable ELTCTL.4 Table 5 Category 6 connecting hardware TCTL 5 Copyright Telecommunications Industry Association Provided by
31、IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.2-9 iii FOREWORD (This foreword is not part of the Standard) It is the intent that the material content related only to category 6 balance requirements and measurement procedures wi
32、ll be published as addendum 9 to ANSI/TIA/EIA-568-B.1. TIA standards documents are developed within the Technical Committees of the TIA and the standards coordinating committees of the TIA standards board. Members of the committees serve voluntarily and without commission. The companies that they re
33、present are not necessarily members of the TIA. The standards developed within the TIA represent a consensus of the broad expertise on the subject. This expertise comes from within the TIA as well as those outside of the TIA that have an expressed interest. The viewpoint expressed at the time that t
34、his standard was approved was from the contributors experience and the state of the art at that time. Users are encouraged to verify that they have the latest revision of the standard. This standard has been prepared by the TR-42.7 Subcommittee and approved by the Engineering Committee TR-42. There
35、is one annex in this Standard. Annex A is normative and considered a mandatory part of this Standard. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.2-9 1 1 INTRODUCT
36、ION This addendum provides updated specifications, and laboratory test procedures for category 6 balance requirements and measurements. 2 PURPOSE AND SCOPE The contents of this Standard supersede the category 6 balance guidelines in clause 7.6 and annex D of the TIA-568-B.2-1. 3 DEFINITIONS & ACRONY
37、MS 3.1 Definitions The generic definitions in this section have been formulated for use by the entire family of telecommunications infrastructure standards. As such, the definitions do not contain mandatory requirements of the Standard. Specific requirements are found in the normative sections of th
38、is Standard. transverse conversion transfer loss: A ratio, expressed in dB, of the measured common mode voltage on a pair relative to the differential mode voltage applied at the opposite end of the same pair, or on either end of another pair. equal level transverse conversion transfer loss: A calcu
39、lation, expressed in dB, of the difference between measured TCTL and the differential mode insertion loss of the disturbed pair. 3.2 Acronyms and abbreviations TCTL transverse conversion transfer loss ELTCTL equal level transverse conversion transfer loss 4 BALANCE Balance properties are related to
40、the emission and immunity characteristics of the cabling. Balance parameters are expressed in dB as the ratio of the signal measured at the device under test (DUT) output port relative to the signal entering the DUT input port. Copyright Telecommunications Industry Association Provided by IHS under
41、license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.2-9 2 4.1 Transverse conversion loss (TCL) TCL shall be measured for all cable and connecting hardware pairs in accordance with annex A. NOTE TCL and LCL parameters are reciprocal. LCL can be
42、 determined using a TCL measurement. 4.1.1 Cable TCL For all frequencies from 1 MHz to 250 MHz, category 6 cable TCL shall meet the values determined using equation (1). Calculations that result in TCL values greater than 40 dB shall revert to a requirement of 40 dB minimum. The values in table 1 ar
43、e provided for information only. NOTE - When achievable, a 50 dB measurement plateau is recommended. )100log(1030 fTCLcable dB (1) Table 1 Category 6 cable TCL Frequency (MHz) TCL (dB) 1.0 4.0 8.0 10.0 16.0 20.0 25.0 31.25 62.5 100.0 200.0 250.0 40.0 40.0 40.0 40.0 38.0 37.0 36.0 35.1 32.0 30.0 27.0
44、 26.0 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA-568-B.2-9 3 4.1.2 Connecting hardware TCL For all frequencies from 1 MHz to 250 MHz, category 6 connecting hardware TCL
45、 shall meet the values determined using equation (2). Calculations that result in TCL values greater than 40 dB shall revert to a requirement of 40 dB minimum. The values in table 2 are provided for information only. )100log(2028 fTCLconn dB (2) Table 2 Category 6 connecting hardware TCL Frequency (
46、MHz) TCL (dB) 1.0 4.0 8.0 10.0 16.0 20.0 25.0 31.25 62.5 100.0 200.0 250.0 40.0 40.0 40.0 40.0 40.0 40.0 40.0 38.1 32.1 28.0 22.0 20.0 4.2 Transverse conversion transfer loss (TCTL) TCTL shall be measured for all connecting hardware in accordance with annex A. TCTL shall be measured and ELTCTL shall
47、 be calculated for cables in accordance with annex A. TCTL and ELTCTL are specified for the opposite ends of the same pair. TCTL and ELTCTL between pairs are not specified. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networ
48、king permitted without license from IHS-,-,-TIA-568-B.2-9 4 4.2.1 Cable equal level transverse conversion transfer loss (ELTCTL) For all frequencies from 1 MHz to 250 MHz, cable TCTL shall be measured in accordance with annex A. ELTCTL shall be calculated in accordance with equation (3) and shall meet the values determined using the equations in table 3. The values in table 4 are provided for information only. DMcablecablecableILTCTLELTCTL_= (3) DMcableIL_shall be measured in accordance with clause C.1 of TIA-568-B.2. Table 3 Category 6 cable ELTCTL F
