1、BSI Standards Publication Information technology Generic cabling systems for customer premises Part 9903: Matrix modelling of channels and links PD ISO/IEC TR 11801-9903:2015National foreword This Published Document is the UK implementation of ISO/IEC TR 11801-9903:2015. The UK participation in its
2、preparation was entrusted to Technical Committee TCT/7, Telecommunications - Installation requirements. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users ar
3、e responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 86944 0 ICS 35.200 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of
4、the Standards Policy and Strategy Committee on 30 November 2015. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD ISO/IEC TR 11801-9903:2015 ISO/IEC TR 11801-9903 Edition 1.0 2015-10 TECHNICAL REPORT Information technology Generic cabling systems for customer p
5、remises Part 9903: Matrix modelling of channels and links INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 35.200 ISBN 978-2-8322-2923-1 Warning! Make sure that you obtained this publication from an authorized distributor. colour inside PD ISO/IEC TR 11801-9903:2015 2 ISO/IEC TR 11801-9903:2015 ISO/IEC
6、 2015 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 8 2 Normative references 8 3 Terms, definitions and abbreviations . 8 3.1 Terms and definitions 8 3.2 Abbreviations 9 4 Matrix model 9 5 Matrix definition . 10 5.1 Quadriports . 10 5.2 Matrix port definition for a two pair system representative fo
7、r modelling purposes . 10 5.3 Operational scattering matrix 10 5.4 General naming convention. 11 5.5 S-Matrix 11 5.6 Passivity . 12 5.7 Operational reflexion loss matrix . 12 5.8 Transmission matrix (T-matrix) 13 5.9 S-matrix of cabling 13 6 Calculation with matrices using limit lines 13 7 Extractin
8、g limit lines 14 7.1 General . 14 7.2 Equations to extract the cabling limit lines 14 7.2.1 Operational attenuation . 14 7.2.2 Near end crosstalk . 15 7.2.3 Attenuation to far end crosstalk ratio . 15 7.2.4 Reflection 15 8 Component values to be used as input to the model 15 8.1 General . 15 8.2 Cab
9、le 16 8.2.1 General . 16 8.2.2 Wave attenuation . 16 8.2.3 Near end crosstalk . 16 8.2.4 Far end crosstalk . 16 8.2.5 Reflection 16 8.3 Connections 17 8.3.1 General . 17 8.3.2 As point source of disturbance . 17 8.3.3 As a transmission line 18 Annex A (informative) S to T and T to S-matrix conversio
10、n formulas 19 A.1 Overview. 19 A.2 Formulas. 19 Annex B (informative) Calculation examples 20 B.1 Overview. 20 B.2 Component assumptions for modelling purposes. 20 PD ISO/IEC TR 11801-9903:2015ISO/IEC TR 11801-9903:2015 3 ISO/IEC 2015 B.2.1 Cables . 20 B.2.2 Connections 21 B.3 Model results 21 B.3.1
11、 General . 21 B.3.2 Insertion loss . 21 B.3.3 NEXT . 22 B.3.4 ACR-F . 22 B.3.5 Return loss 22 Annex C (informative) Terms and definitions 23 C.1 Comparison of namings 23 C.2 General . 24 C.3 Background of terms and definitions . 24 C.3.1 Operational attenuation . 24 C.3.2 Operational transfer functi
12、on (T B ) 26 C.3.3 Image or wave transfer function (T) . 26 C.3.4 Insertion transfers function of a two-port (T BI ) . 26 C.3.5 Insertion transfer function (T BI ) measured with a NWA 26 C.3.6 Operational reflection loss transfer function (T ref= S ref ) of a junction 26 Bibliography 28 Figure 1 Lin
13、k configurations of ISO/IEC 11801:2002 6 Figure 2 Matrix definition of a 4 port 2 twisted pair system . 10 Figure 3 Operational scattering parameters example from port 2 . 11 Figure 4 All 4 ports operational scattering parameter definition 11 Figure 5 S-Matrix definition showing corresponding S para
14、meters . 11 Figure 6 Equal S parameters for real components 12 Figure 7 Final operational scattering matrix for real components 12 Figure 8 Definition of the operational reflection loss matrix with unitarity included (see C.3.6) 13 Figure 9 Transmission matrix concatenation showing an example of a 2
15、 connector permanent link 13 Figure 10 Graphical example of a NEXT-L calculation showing statistical results (red) and final calculation (blue) 14 Figure 11 100 m cable return loss without reflection at both ends 17 Figure 12 100 m cable return loss with a reflection of 0,03 at both ends (6 mismatch
16、, 23 dB return loss at 1 MHz) 17 Figure C.1 Defining the operational attenuation and the operational transfer functions of a two-port . 25 Figure C.2 Defining the reflection transfer functions and the return loss of a junction 27 Table B.1 Modelling assumptions for cable transmission parameters . 20
17、 Table B.2 Modelling assumptions for connection transmission parameters . 21 Table B.3 Insertion loss . 21 Table B.4 NEXT . 22 Table B.5 ACR-F 22 Table B.6 Return loss 22 Table C.1 Comparison of naming in ISO/IEC 11081:2002 and this technical report 23 PD ISO/IEC TR 11801-9903:2015 4 ISO/IEC TR 1180
18、1-9903:2015 ISO/IEC 2015 INFORMATION TECHNOLOGY GENERIC CABLING SYSTEMS FOR CUSTOMER PREMISES Part 9903: Matrix modelling of channels and links FOREWORD 1) ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for
19、 worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collabor
20、ate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. 2) The formal decisions or
21、 agreements of IEC and ISO on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees and ISO member bodies. 3) IEC, ISO and ISO/IEC publications hav
22、e the form of recommendations for international use and are accepted by IEC National Committees and ISO member bodies in that sense. While all reasonable efforts are made to ensure that the technical content of IEC, ISO and ISO/IEC publications is accurate, IEC or ISO cannot be held responsible for
23、the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees and ISO member bodies undertake to apply IEC, ISO and ISO/IEC publications transparently to the maximum extent possible in their national and regional
24、 publications. Any divergence between any ISO, IEC or ISO/IEC publication and the corresponding national or regional publication should be clearly indicated in the latter. 5) ISO and IEC do not provide any attestation of conformity. Independent certification bodies provide conformity assessment serv
25、ices and, in some areas, access to IEC marks of conformity. ISO or IEC are not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or ISO or its directors,
26、employees, servants or agents including individual experts and members of their technical committees and IEC National Committees or ISO member bodies for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
27、 expenses arising out of the publication of, use of, or reliance upon, this ISO/IEC publication or any other IEC, ISO or ISO/IEC publications. 8) Attention is drawn to the normative references cited in this publication. Use of the referenced publications is indispensable for the correct application
28、of this publication. 9) Attention is drawn to the possibility that some of the elements of this ISO/IEC publication may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare In
29、ternational Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. ISO/IEC TR 11801-9903, which is a technical repor
30、t, has been prepared by subcommittee 25: Interconnection of information technology equipment, of ISO/IEC joint technical committee 1: Information technology. The list of all currently available parts of the ISO/IEC 11801 series, under the general title Information technology Generic cabling for cust
31、omer premises, can be found on the IEC web site. This Technical Report has been approved by vote of the member bodies, and the voting results may be obtained from the address given on the second title page. PD ISO/IEC TR 11801-9903:2015ISO/IEC TR 11801-9903:2015 5 ISO/IEC 2015 This publication has b
32、een drafted in accordance with the ISO/IEC Directives, Part 2. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a
33、 colour printer. PD ISO/IEC TR 11801-9903:2015 6 ISO/IEC TR 11801-9903:2015 ISO/IEC 2015 INTRODUCTION The pass/fail limits for defined channel and permanent link cabling configurations have an implicit impact on the component limits for the cabling components used. The channel configurations are des
34、cribed in Clause 5, the link configurations in Clause 6 of ISO/IEC 11801:2002 with its amendments 1:2008 and 2:2010. The permanent link configurations, which represent the fixed portion of the cabling, have two possible topologies: A connection plus a segment of cable plus a connection (2 connector
35、topology). A connection plus a segment of cable plus a connection plus another segment of cable plus another connection (3 connector topology). a) Configuration PL1 PP C PP Tester C Tester C C Permanent link Backbone cabling IEC b) Configuration PL2 TO C PP Tester C Tester C C Permanent link Horizon
36、tal cabling IEC c) Configuration PL3 TO C PP Tester C Tester C C Permanent link Horizontal cabling C CP IEC d) Configuration CP1 CP C PP Tester C Tester C C CP link Horizontal cabling IEC PP = patch panel; C = connection; CP = consolidation point; TO = telecommunications outlet Figure 1 Link configu
37、rations of ISO/IEC 11801:2002 This Technical Report includes models and assumptions, which support pass/fail limits for the channel and permanent link test configurations in this standard. These are based on the performance requirements of cable and connecting hardware as specified in IEC standards.
38、 This Technical Report provides reasonable assurance that a channel created by adding compliant patch cords to a previously certified permanent link will meet the applicable channel performance limits. PD ISO/IEC TR 11801-9903:2015ISO/IEC TR 11801-9903:2015 7 ISO/IEC 2015 Over the years the frequenc
39、ies of the classes increased, but the theory for calculating the limits stayed the same. Especially the higher order effects had to be considered and at the end only by doing a Monte Carlo calculation, assuming that not all components would be at the limit at the same time, allowed to prove complian
40、ce. The model uses 2 pairs for all calculations. The limits are equal for pairs or pair combinations but in reality measured values could be different. If results are required that need more pairs to be considered, then this calculation can be done based on the results from multiple 2 pair calculati
41、ons with appropriate inputs (worst case). An example of such a calculation is the power sum and average limit lines for 4 pairs. Symmetry and additional contributions that result from unbalanced signals and differential-to- common and common-to-differential mode coupling are not included in this Tec
42、hnical Report but can be added easily in a next step by increasing the matrix size. For details on the naming of transmission parameters, see definitions and Clause C.1. PD ISO/IEC TR 11801-9903:2015 8 ISO/IEC TR 11801-9903:2015 ISO/IEC 2015 INFORMATION TECHNOLOGY GENERIC CABLING SYSTEMS FOR CUSTOME
43、R PREMISES Part 9903: Matrix modelling of channels and links 1 Scope This part of ISO/IEC 11801 establishes a matrix-model for formulating limits for differential mode parameters for return loss, insertion loss, and near and far end crosstalk, within and between two pairs of balanced cabling. This i
44、s for the purpose of supporting new, improved balanced cabling channel and link specifications, which are expected to be included in the next edition of ISO/IEC 11801 1 . 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispen
45、sable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 11801:2002, Information technology Generic cabling for customer premises Amendment 1:2008 Amendment 2:201
46、0 23 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 11801 and the following apply. 3.1.1 attenuation general term to indicate diminishing of signal strength Note 1 to entry: Details need to be added to indi
47、cate the exact usage. 3.1.2 connection two mated connectors EXAMPLE: Jack and plug. 3.1.3 image attenuation wave attenuation attenuation when a two-port is terminated by its input and output characteristic impedances with no reflections at input and output Note 1 to entry: The wave attenuation of ca
48、bles is length scalable. _ 1A new edition of ISO/IEC 11801 is under consideration and is planned as ISO/IEC 11801-1 (first edition). 2A consolidated version of this publication exists, comprising ISO/IEC 11801:2002, ISO/IEC 11801:2002/AMD 1:2008 and ISO/IEC 11801:2002/AMD 2:2010. PD ISO/IEC TR 11801
49、-9903:2015ISO/IEC TR 11801-9903:2015 9 ISO/IEC 2015 3.1.4 insertion loss attenuation or loss caused by a two-port inserted into a system 3.1.5 insertion loss deviation deviation of loss (attenuation) with regard to the wave attenuation due to mismatches (not only at the ends) 3.1.6 operational attenuation ratio of the square root of the maximum available (complex) power wave from the generator and the square root of the (complex) power consumed (taken) by the
