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BSI PD CLC/TS 50083-3-3:2014

BSI PD CLC/TS 50083-3-3:2014

$102.76

Cable networks for television signals, sound signals and interactive services – Active wideband equipment for cable networks. Methods of measurement of the maximum operating output level in the return path

Published By Publication Date Number of Pages
BSI 2014 20
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This Technical Specification is applicable to the method of nonlinearity measurement for active cable network equipment which carry a digital channel load in the return path. The digital channel load is represented by standard DVB-C signals. The method of measurement of the maximum operating output level takes account of a full channel load in the return path frequency range although different applications of return path amplifiers with partial channel load or single channel load are also in practical use. The maximum operating output level for applications with reduced channel loads could be derived from the result with a full channel load by applying a given calculation formula.

The method considers the specific signal form and behaviour of digitally modulated signals and can be applied in the return path frequency range (5 MHz to 65 MHz) as well as in the extended return path frequency range (5 MHz to 85 MHz) according to EN 60728-10.

PDF Catalog

PDF Pages PDF Title
5 Foreword
6 Introduction
7 1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
8 Figure 1 − Interrelation between different MER contributions
9 3.2 Symbols
10 3.3 Abbreviations
4 Method of measurement of the maximum operating output level in the return path
4.1 General
4.1.1 Channel load and modulation format
4.1.2 Return path frequency ranges
4.1.3 Applied limit values
11 4.2 Measurement parameters for full channel load (N = 6 or N = 8)
Table 1 ‒ Measurement parameters for full channel load
4.3 Equipment required
12 4.4 Connection of the equipment
Figure 2 – BER/MER measurement test configuration
4.5 Measurement procedure
13 4.6 Presentation of the measurement results
4.7 Maximum operating output level for reduced channel loads
14 Annex A (normative) Null packet and PRBS definitions
A.1 Null packet definition
15 Table A.1 – Null-transport-stream packet definition
A.2 PRBS definition
16 Annex B (informative) Calculation formula for the maximum operating output level for reduced channel loads
B.1 General
B.2 Measurement results as basis for calculation formula for reduced channel loads
Figure B.1 − Results of measurements with full, partial and single channel load
17 B.3 Calculation formula for median value
Table B.1 − Calculated median values
B.4 Calculation formula for worst-case value
Table B.2 − Calculated worst-case values
18 Bibliography

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BSI PD CLC/TS 50083-3-3:2014
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