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BSI PD ISO/IEC TS 11801-9903:2021

BSI PD ISO/IEC TS 11801-9903:2021

$198.66

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

Published By Publication Date Number of Pages
BSI 2021 52
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This part of ISO/IEC 11801, which is a Technical Specification, establishes a matrix-model for formulating limits for mixed-mode parameters within and between two pairs of balanced cabling. This is for the purpose of supporting new, improved balanced cabling channel and link specifications.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
7 FOREWORD
9 INTRODUCTION
Figures
Figure 1 – Link configurations of ISO/IEC 11801-1
11 1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
12 3.2 Symbols and abbreviated terms
13 4 Matrix model
5 Matrix definition
5.1 General
5.2 Quadriports
5.3 Matrix port definition for a two-pair system representative for modelling purposes
14 5.4 Operational scattering matrix
5.5 General naming convention
Figure 2 – Matrix definition of a 4-port two twisted pair system
Figure 3 – Operational scattering parameters example from port 2
Tables
Table 1 – All four ports operational scattering parameter definition
15 5.6 S-matrix
5.7 Passivity
Table 2 – Equal S-parameters for real components
16 5.8 Operational reflection loss matrix
5.9 Transmission matrix (T-matrix)
5.10 S-matrix of cabling
Figure 4 – Transmission matrix concatenation showingan example of a 2-connector permanent link
17 6 Calculation with matrices using limit lines
7 Extracting limit lines
18 8 General case using mixed-mode matrices
8.1 General
8.2 M-parameters
Figure 5 – Graphical example of a NEXT calculation showing statistical results (red) and final calculation (blue)
Figure 6 – One pair M-matrix showing the submatrices
19 9 Submatrix DD
9.1 General
9.2 Equations to extract the cabling limit lines
9.2.1 General
9.2.2 Operational attenuation
9.2.3 Near-end crosstalk
9.2.4 Attenuation to far-end crosstalk ratio
20 9.2.5 Reflection (RL)
10 Component values to be used as input to the model
10.1 General
21 10.2 Cable
10.2.1 General
10.2.2 Wave attenuation
10.2.3 Near-end crosstalk
10.2.4 Far-end crosstalk
22 10.2.5 Reflection
Figure 7 – 100 m cable return loss without reflection at both ends
23 10.3 Connections
10.3.1 General
10.3.2 As a point source of disturbance
10.3.3 As a transmission line
Figure 8 – 100 m cable return loss with a reflection of 0,03 at both ends(6 Ω mismatch, ~23 dB return loss at 1 MHz)
24 11 Submatrices CC, CD and DC
11.1 General
11.2 Submatrix CD
11.3 Submatrix DC
11.4 Submatrix CC
25 Annex A (informative)Matrix conversion formulas
A.1 Overview
A.2 Formulas
A.2.1 Mixed-mode to T-matrix
A.2.2 T-matrix to M-matrix
A.2.3 Conversion matrices
26 Figure A.1 – X matrices
27 Annex B (normative)Channel and permanent link models for balanced cabling
B.1 General
B.2 Insertion loss
B.2.1 Insertion loss of the channel configuration
28 B.2.2 Insertion loss of the permanent link configurations
B.2.3 Assumptions for insertion loss
Table B.1 – Insertion loss deviation
29 B.3 NEXT
B.3.1 NEXT of the channel configuration
B.3.2 NEXT of the permanent link configurations
30 B.3.3 Assumptions for NEXT
Figure B.1 – Example of computation of NEXT with higher precision
33 B.4 ACR-F
B.4.1 ACR-F of the channel configuration
B.4.2 ACR-F for the permanent link configurations
34 B.4.3 Assumptions for ACR-F
B.5 No Return loss
B.5.1 Return loss of the channel and permanent link configurations
35 B.5.2 Assumptions for the return loss circuit analysis method
38 B.6 PS ANEXT link modelling
B.6.1 General
B.6.2 PS ANEXT between connectors
B.6.3 PS ANEXT between cable segments
B.6.4 Principles of link modelling
39 B.7 PS AACR-F link modelling
B.7.1 General
B.7.2 PS AFEXT between connectors
B.7.3 PS AACR-F between cable segments
B.7.4 Principles of link modelling
40 B.7.5 Impact of PS AACR-F in channels and links with substantially different lengths
Figure B.2 – Example of increased impact of PS AFEXT
43 B.8 Component assumptions for modelling purposes
Table B.2 – Modelling assumptions for cable transmission parameters
Table B.3 – Model input assumptions used in the statistical calculation (Class EA)
44 Table B.4 – Model input assumptions used in the statistical calculation (Class FA)
45 Annex C (informative)Terms and definitions
C.1 Comparison of namings
Table C.1 – Comparison of naming in ISO/IEC 11801-1 and ISO/IEC TS 11801-9903
46 C.2 General
C.3 Background of terms and definitions
C.3.1 Operational attenuation
47 Figure C.1 – Defining the operational attenuation andthe operational transfer functions of a two-port
48 C.3.2 Operational transfer function (TB)
C.3.3 Image or wave transfer function (T)
C.3.4 Insertion transfer function of a two-port (TBI)
C.3.5 Insertion transfer function (TBI) measured with a vector network analyser
C.3.6 Operational reflection loss transfer function (Tref = Sref) of a junction
49 Figure C.2 – Defining the reflection transfer functionsand the return loss of a junction
50 Bibliography

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