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BSI PD ISO/IEC TR 11801-9903:2015

BSI PD ISO/IEC TR 11801-9903:2015

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Information technology. Generic cabling systems for customer premises – Matrix modelling of channels and links

Published By Publication Date Number of Pages
BSI 2015 32
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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 is 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 .

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
6 FOREWORD
8 INTRODUCTION
Figures
FigureĀ 1 ā€“ Link configurations of ISO/IECĀ 11801:2002
10 1 Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 Terms and definitions
11 3.2 Abbreviations
4 Matrix model
12 5 Matrix definition
5.1 Quadriports
5.2 Matrix port definition for a two pair system representative for modelling purposes
5.3 Operational scattering matrix
FigureĀ 2 ā€“ Matrix definition of a 4 port 2 twisted pair system
13 5.4 General naming convention
5.5 S-Matrix
FigureĀ 3 ā€“ Operational scattering parameters example from port 2
FigureĀ 4 ā€“ All 4 ports operational scattering parameter definition
FigureĀ 5 ā€“ S-Matrix definition showing corresponding S parameters
14 5.6 Passivity
5.7 Operational reflexion loss matrix
FigureĀ 6 ā€“ Equal S parameters for real components
FigureĀ 7 ā€“ Final operational scattering matrix for real components
15 5.8 Transmission matrix (T-matrix)
5.9 S-matrix of cabling
6 Calculation with matrices using limit lines
FigureĀ 8 ā€“ Definition of the operational reflection loss matrixwith unitarity included (see C.3.6)
FigureĀ 9 ā€“ Transmission matrix concatenation showingan example of a 2 connector permanent link
16 7 Extracting limit lines
7.1 General
7.2 Equations to extract the cabling limit lines
7.2.1 Operational attenuation
FigureĀ 10 ā€“ Graphical example of a NEXT-L calculation showing statistical results (red) and final calculation (blue)
17 7.2.2 Near end crosstalk
7.2.3 Attenuation to far end crosstalk ratio
7.2.4 Reflection
8 Component values to be used as input to the model
8.1 General
18 8.2 Cable
8.2.1 General
8.2.2 Wave attenuation
8.2.3 Near end crosstalk
8.2.4 Far end crosstalk
8.2.5 Reflection
19 8.3 Connections
8.3.1 General
8.3.2 As point source of disturbance
FigureĀ 11 ā€“ 100 m cable return loss without reflection at both ends
FigureĀ 12 ā€“ 100 m cable return loss with a reflection of 0,03 at both ends (6Ā ā„¦ mismatch, ~23 dB return loss at 1 MHz)
20 8.3.3 As a transmission line
21 Annex A (informative) S to T and T to S-matrix conversion formulas
A.1 Overview
A.2 Formulas
22 Annex B (informative) Calculation examples
B.1 Overview
B.2 Component assumptions for modelling purposes
B.2.1 Cables
Tables
TableĀ B.1 ā€“ Modelling assumptions for cable transmission parameters
23 B.2.2 Connections
B.3 Model results
B.3.1 General
B.3.2 Insertion loss
TableĀ B.2 ā€“ Modelling assumptions for connection transmission parameters
TableĀ B.3 ā€“ Insertion loss
24 B.3.3 NEXT
B.3.4 ACR-F
B.3.5 Return loss
TableĀ B.4 ā€“ NEXT
TableĀ B.5 ā€“ ACR-F
TableĀ B.6 ā€“ Return loss
25 Annex C (informative) Terms and definitions
C.1 Comparison of namings
TableĀ C.1 ā€“ Comparison of naming in ISO/IEC 11081:2002 and this technical report
26 C.2 General
C.3 Background of terms and definitions
C.3.1 Operational attenuation
27 FigureĀ C.1 ā€“ Defining the operational attenuation andthe operational transfer functions of a two-port
28 C.3.2 Operational transfer function (TB)
C.3.3 Image or wave transfer function (T)
C.3.4 Insertion transfers function of a two-port (TBI)
C.3.5 Insertion transfer function (TBI) measured with a NWA
C.3.6 Operational reflection loss transfer function (Tref = Sref) of a junction
29 FigureĀ C.2 ā€“ Defining the reflection transfer functions and the return loss of a junction
30 Bibliography

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BSI PD ISO/IEC TR 11801-9903:2015
$142.49