1、 TIA-1152-A (Revision of TIA-1152) November 2016Requirements for Field Test Instruments and Measurements for Balanced Twisted-Pair Cabling ANSI/TIA-1152-A-2016 APPROVED: NOVEMBER 10, 2016 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating
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23、 NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. ANSI/TIA-1152-Aiii Requirements for Field Test Instruments and Measurements for Balanced Twisted-Pair Cabling TABLE OF CONTENTS 1 SCOPE . 1 2 NORMATIVE REFERENCES . 1 3 DEFINITIONS, ABBREVIATIONS AND ACRONYMS, UNITS OF MEASURE 1 3.1 General 1 3.2 De
24、finitions 1 3.3 Acronyms and abbreviations . 2 3.4 Units of measure . 2 3.5 Variables 2 4 TEST INSTRUMENTS 3 4.1 General 3 4.2 Data reporting requirements 3 Parameters to be reported . 3 4.2.14.2.1.1 Measurement of resistance parameters of cabling 3 Wire Map 4 4.2.2Length 5 4.2.34.2.3.1 Physical len
25、gth vs. electrical length 5 4.2.3.2 NVP calibration . 5 Pass/fail results 5 4.2.4Detailed results 6 4.2.5Summary results 6 4.2.64.3 Field measurement procedures. 10 Consistency checks for field testers 10 4.3.1Administration 11 4.3.2Test equipment connectors and cords . 11 4.3.34.4 Field tester meas
26、urement accuracy requirements 11 General 11 4.4.1Nominal accuracy 11 4.4.2Length, propagation delay, and delay skew performance parameters 15 4.4.3Performance parameters for Level IIe field testers 16 4.4.4Performance parameters for Level III field testers . 18 4.4.5Performance parameters for Level
27、IIIe field testers . 19 4.4.6Performance parameters for Level 2G field testers . 21 4.4.7Performance parameters for measurement of cabling for resistance parameters 24 4.4.84.5 Procedures for determining field tester parameters 25 General 25 4.5.1Output signal balance (OSB) . 25 4.5.2Common mode rej
28、ection (CMR) 26 4.5.3Residual NEXT loss . 26 4.5.4Dynamic accuracy 27 4.5.5Source/load return loss 28 4.5.6Random noise floor 28 4.5.7Residual FEXT loss . 28 4.5.8Directivity 29 4.5.9Reflection Tracking 29 4.5.10Source match . 30 4.5.11Return loss of remote termination 31 4.5.12Constant error term o
29、f the length measurement function 31 4.5.13Error constant proportional to length of the length measurement function 31 4.5.14Constant error term of the propagation delay measurement function . 31 4.5.15ANSI/TIA-1152-A iv Error constant of the proportional to propagation delay measurement function 4.
30、5.16proportional to the propagation delay 31 Constant error term of the delay skew measurement function 31 4.5.17Constant error term of dc loop resistance for measurement of cabling for resistance 4.5.18parameters 31 Error term proportional to the dc loop resistance for measurement of cabling for 4.
31、5.19resistance parameters . 32 Constant error term of resistance unbalance for measurement of cabling for 4.5.20resistance unbalance . 32 Error term proportional to the dc loop resistance for measurement of cabling for 4.5.21resistance unbalance . 32 4.6 Measurement error models . 33 General 33 4.6.
32、1Error model for the insertion loss measurement function 33 4.6.2Error model for the NEXT loss measurement function 33 4.6.3Error model for the PSNEXT loss measurement function . 34 4.6.4Error model for the ACRF measurement function . 34 4.6.5Error model for the PSACRF measurement function 36 4.6.6E
33、rror model for the return loss measurement function 37 4.6.7Error model for the propagation delay measurement function 37 4.6.8Error model for the delay skew measurement function . 38 4.6.9Error model for the length measurement function . 38 4.6.10Error model for dc loop resistance . 38 4.6.11Error
34、model for resistance unbalance 38 4.6.124.7 Alien crosstalk measurement requirements and procedures 38 General 38 4.7.1Frequency range 38 4.7.2Test parameters . 38 4.7.3Test configurations . 39 4.7.4Test equipment for measuring alien crosstalk in installed cabling. 39 4.7.5Channel alien crosstalk te
35、sting 39 4.7.6Permanent link testing . 39 4.7.7Alien crosstalk measurement floor . 39 4.7.8Measurement floor of the test instrument for the channel test configuration . 40 4.7.9Measurement floor of the test instrument with permanent link adapter test cords 40 4.7.10Alien crosstalk measurements . 41
36、4.7.114.7.11.1 Measuring ANEXT loss in the channel configuration . 41 4.7.11.2 Measuring AFEXT loss in the channel configuration 41 4.7.11.3 Measurement of permanent link alien crosstalk . 42 Processing measurement data 42 4.7.124.7.12.1 Computing PSANEXT loss and PSAACRF 42 4.7.12.1.1 Computing cat
37、egory 6A PSANEXT loss and PSAACRF 42 4.7.12.1.2 Computing category 8 PSANEXT loss and PSAACRF 42 4.7.12.2 Category 6A significance condition testing . 43 4.7.12.3 Applying measurement floor correction to category 6A alien crosstalk 43 4.8 Comparison measurement procedures . 44 General 44 4.8.1Resist
38、ance Unbalance pair-to-pair (Optional)Test setup and apparatus required for 4.8.2comparison measurements . 44 General requirements 44 4.8.34.8.3.1 Test adapters 44 4.8.3.1.1 General . 44 4.8.3.1.2 Special patch cords. 45 4.8.3.2 Comparison methods 46 4.8.3.2.1 Comparison method using worst case perf
39、ormance margin 46 4.8.3.2.2 Comparison method using full frequency responses 46 ANSI/TIA-1152-Av Annex A (informative) - Typical measurement accuracy of reference laboratory measurement systems . 48 Annex B (informative) Derivation of Level 2G Source Match and Reflection Tracking terms . 52 Annex C
40、(informative) - Guidance for the applicability of resistance and resistance unbalance measurements 55 Annex D (informative) - Bibliography 56 ANSI/TIA-1152-A vi LIST OF FIGURES Figure 1 Correct Pairing, T568-A termination 4 Figure 2 Incorrect Pairing 5 Figure 3 - Example of NVP calibration .5 Figure
41、 4 - Block diagram to measuring output signal balance 25 Figure 5 - Block diagram to measuring common mode rejection 26 Figure 6 - Block diagram for measuring residual NEXT loss . 27 Figure 7 - Block diagram for measuring dynamic accuracy 27 Figure 8 - Block diagram of measurement of residual FEXT l
42、oss . 29 Figure 9 - Block diagram of alternate measurement of residual FEXT loss 29 Figure 10 - Schematic diagram for testing the measurement floor of the channel test configuration40 Figure 11 - Schematic diagram for testing the measurement floor of the permanent link test configuration . 41 Figure
43、 12 - Schematic diagram to measure channel ANEXT loss 41 Figure 13 - Schematic diagram to measure channel AFEXT loss 42 Figure 14 - Special patch cord for the baseline and channel test comparison 45 Figure 15 - Special patch cord for permanent link test comparison 45 Figure 16 - Example of observed
44、Level IIIe accuracy . 47 LIST OF TABLES Table 1 - Field tester summary reporting requirements .6 Table 2 Additional Field tester summary reporting requirements for measurement of cabling for resistance parameters .9 Table 3 Limits to be used for calculating accuracy . 12 Table 4 - Level IIe Nominal
45、measurement accuracies at category 5e pass/fail limits . 12 Table 5 - Level III nominal measurement accuracies at category 6 pass/fail limits 13 Table 6 - Level IIIe nominal measurement accuracies at category 6A pass/fail limits 13 Table 7 - Level 2G nominal measurement accuracies at category 8 pass
46、/fail limits 14 Table 8 - Accuracies for resistance measurements for measurement of cabling for resistance parameters . 15 Table 9 - Field tester requirements including accuracy for length, propagation delay, and delay skew, applicable to all levels 15 Table 10 - Minimum requirements for measurement
47、 accuracy of Level IIe field testers . 16 Table 11 - Explanation of notes in table 10 . 17 Table 12 - Minimum requirements for measurement accuracy of Level III field testers 18 Table 13 - Explanation of notes in table 12 . 19 Table 14 - Level IIIe field tester accuracy performance 20 Table 15 - Exp
48、lanation of notes in table 14 . 21 Table 16 - Level 2G field tester accuracy performance. 22 Table 17 - Explanation of notes in Table 16 23 Field testers capable of measuring resistance parameters shall comply with Table 18. 24 Table 18 - Performance parameters for measurement of cabling for resista
49、nce parameters . 24 Table A.1 - Typical laboratory equipment accuracy performance parameters 48 Table A.2 - Measurement performance parameters at key frequencies . 49 Table A.3 - Absolute reference load return loss 50 Table A.4 - Predicted measurement worst case accuracy using laboratory equipment at category 6A channel limits 50 Table A.5 - Predicted measurement worst case accuracy using laboratory equipment at category 8 channel limits . 51 Table C.1 dc Loop Resistance . 55 Table C.2 dc Resistance Unbalance 55 Table C.3 dc Resistance unbalance between pairs 55 ANSI/TIA-1
