ISO/IEC TS 11801-9903:2021

ISO/IEC TS 11801-9903
Edition 1.0 2021-03
TECHNICAL
SPECIFICATION
colour
inside
Information technology – Generic cabling systems for customer premises –
Part 9903: Matrix modelling of channels and links

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ISO/IEC TS 11801-9903
Edition 1.0 2021-03
TECHNICAL
SPECIFICATION
colour
inside
Information technology – Generic cabling systems for customer premises –

Part 9903: Matrix modelling of channels and links

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-9498-7

– 2 – ISO/IEC TS 11801-9903:2021
 ISO/IEC 2021
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Symbols and abbreviated terms . 10
4 Matrix model . 11
5 Matrix definition . 11
5.1 General . 11
5.2 Quadriports . 11
5.3 Matrix port definition for a two-pair system representative for modelling
purposes . 11
5.4 Operational scattering matrix . 12
5.5 General naming convention. 12
5.6 S-matrix . 13
5.7 Passivity . 13
5.8 Operational reflection loss matrix . 14
5.9 Transmission matrix (T-matrix) . 14
5.10 S-matrix of cabling . 14
6 Calculation with matrices using limit lines . 15
7 Extracting limit lines . 15
8 General case using mixed-mode matrices. 16
8.1 General . 16
8.2 M-parameters . 16
9 Submatrix DD . 17
9.1 General . 17
9.2 Equations to extract the cabling limit lines . 17
9.2.1 General . 17
9.2.2 Operational attenuation . 17
9.2.3 Near-end crosstalk . 17
9.2.4 Attenuation to far-end crosstalk ratio . 17
9.2.5 Reflection (RL) . 18
10 Component values to be used as input to the model . 18
10.1 General . 18
10.2 Cable . 19
10.2.1 General . 19
10.2.2 Wave attenuation . 19
10.2.3 Near-end crosstalk . 19
10.2.4 Far-end crosstalk . 19
10.2.5 Reflection . 20
10.3 Connections . 21
10.3.1 General . 21
10.3.2 As a point source of disturbance . 21
10.3.3 As a transmission line . 21
11 Submatrices CC, CD and DC . 22

 ISO/IEC 2021
11.1 General . 22
11.2 Submatrix CD . 22
11.3 Submatrix DC . 22
11.4 Submatrix CC . 22
Annex A (informative) Matrix conversion formulas . 23
A.1 Overview. 23
A.2 Formulas. 23
A.2.1 Mixed-mode to T-matrix . 23
A.2.2 T-matrix to M-matrix . 23
A.2.3 Conversion matrices . 23
Annex B (normative) Channel and permanent link models for balanced cabling . 25
B.1 General . 25
B.2 Insertion loss . 25
B.2.1 Insertion loss of the channel configuration . 25
B.2.2 Insertion loss of the permanent link configurations . 26
B.2.3 Assumptions for insertion loss . 26
B.3 NEXT . 27
B.3.1 NEXT of the channel configuration . 27
B.3.2 NEXT of the permanent link configurations . 27
B.3.3 Assumptions for NEXT . 28
B.4 ACR-F . 31
B.4.1 ACR-F of the channel configuration . 31
B.4.2 ACR-F for the permanent link configurations . 31
B.4.3 Assumptions for ACR-F . 32
B.5 No Return loss . 32
B.5.1 Return loss of the channel and permanent link configurations . 32
B.5.2 Assumptions for the return loss circuit analysis method . 33
B.6 PS ANEXT link modelling . 36
B.6.1 General . 36
B.6.2 PS ANEXT between connectors . 36
B.6.3 PS ANEXT between cable segments . 36
B.6.4 Principles of link modelling . 36
B.7 PS AACR-F link modelling . 37
B.7.1 General . 37
B.7.2 PS AFEXT between connectors . 37
B.7.3 PS AACR-F between cable segments . 37
B.7.4 Principles of link modelling . 37
B.7.5 Impact of PS AACR-F in channels and links with substantially different
lengths . 38
B.8 Component assumptions for modelling purposes. 41
Annex C (informative) Terms and definitions . 43
C.1 Comparison of namings . 43
C.2 General . 44
C.3 Background of terms and definitions . 44
C.3.1 Operational attenuation . 44
C.3.2 Operational transfer function (T ) . 46
B
C.3.3 Image or wave transfer function (T) . 46
C.3.4 Insertion transfer function of a two-port (T ) . 46
BI
– 4 – ISO/IEC TS 11801-9903:2021
 ISO/IEC 2021
C.3.5 Insertion transfer function (T ) measured with a vector network
BI
analyser . 46
C.3.6 Operation
...