AS/NZS CISPR 16.4.4:2012
Specification for radio disturbance and immunity measuring apparatus and methods - Part 4.4: Uncertainties, statistics and limit modelling - Statistics of complaints and a model for the calculation of limits for the protection of radio services
Makes a recommendation on how to deal with statistics of radio interference complaints. Describes the calculation of limits for disturbance field strength and voltage for the measurement on a test site based on models for the distribution of disturbances by radiated and conducted coupling, respectively. Identical to and reproduced from CISPR 16-4-4, Ed. 2.0 (2007).
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AS/NZS CISPR 16.4.4:2012 Specification for radio disturbance and immunity measuring apparatus and methods Uncertainties, statistics and limit modelling -- Statistics of complaints and a model for the calculation of limits for the protection of radio servi
CONTENTS
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Statistics of complaints and sources of interference
4.1 Introduction and history
4.2 Relationship between radio frequency interference and complaints
4.3 Towards the loss of a precious indicator: interference complaints
4.4 CISPR recommendations for collation of statistical data on interference complaints and classification of interference sources
4.5 Forms for statistics of interference complaints
5 A model for the calculation of limits
5.1 Introduction
5.2 Probability of interference
5.3 Circumstances of interferences
5.4 A mathematical basis for the calculation of CISPR limits
5.5 Application of the mathematical basis
5.6 Another suitable method for equipment in the frequency range 150€kHz to 1€GHz
5.7 Rational for determination of CISPR limits in the frequency range above 1€GHz
Annex€A Excerpt from CISPR Report No. 31 Values of mains decoupling factor in the range 0,1€MHz to 200€MHz
Bibliography
Figures
Figure€1a – Standard form for statistics on interference complaints recommended for radio services with analogue modulation and fixed or stationary radio reception
Figure€1b – Standard form for statistics on interference complaints recommended for radio services with analogue modulation and mobile or portable radio reception
Figure€1c – Standard form for statistics on interference complaints recommended for radio services with digital modulation and fixed or stationary radio reception
Figure€1d – Standard form for statistics on interference complaints recommended for radio services with digital modulation and mobile or portable radio reception
Figure 1 – Standard forms for statistics on interference complaints
Figure 2 – Model for remote coupling situation derived disturbance field strength eir at receiving distance r
Figure€3 – Model for close coupling situations
Figure€4 – Example of conversion factors – field strength / common-mode voltage (in dB) – at feed point, found in practice
Figure€5 – Example of conversion factors – field strength generated by differential-mode voltage – at feed point, found in practice
Figure€6 – Example of conversion factors – field strength generated by differential-mode voltage – outside buildings and electrical substations, found in practice
Figure€7 – Example of conversion factors – field strength generated by differential-mode voltage – inside buildings, found in practice
Figure A.1 – Mains decoupling coefficient as measured by various authors
Figure A.2 – Median and minimum values of mains decoupling factor for the range 0,1€MHz to 200€MHz
Figure A.3 – Typical distributions of deviations from median value of decoupling factor as indicated in Figure A.2
Figure A.4 – Measurement of the mains decoupling factor
Table 1 – Classification of sources of radio frequency interference and other causes of complaint
Table€2 – Guidance survey of RFI measuring methods
Table€3 – Tabulation of the method of determining limits for equipment in the frequency range 0,150€MHz to 960€MHz
Table 4 – Calculation of permissible limits for disturbances at about 1 800 MHz from existing CISPR limits in the frequency range of 900 MHz
Table€5 – List of radio services, typical parameters, and influence factors
Previous versions
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AS/NZS CISPR 16.4.4:2012 Specification for radio disturbance and immunity measuring apparatus and methods Uncertainties, statistics and limit modelling -- Statistics of complaints and a model for the calculation of limits for the protection of radio servi
CONTENTS
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Statistics of complaints and sources of interference
4.1 Introduction and history
4.2 Relationship between radio frequency interference and complaints
4.3 Towards the loss of a precious indicator: interference complaints
4.4 CISPR recommendations for collation of statistical data on interference complaints and classification of interference sources
4.5 Forms for statistics of interference complaints
5 A model for the calculation of limits
5.1 Introduction
5.2 Probability of interference
5.3 Circumstances of interferences
5.4 A mathematical basis for the calculation of CISPR limits
5.5 Application of the mathematical basis
5.6 Another suitable method for equipment in the frequency range 150€kHz to 1€GHz
5.7 Rational for determination of CISPR limits in the frequency range above 1€GHz
Annex€A Excerpt from CISPR Report No. 31 Values of mains decoupling factor in the range 0,1€MHz to 200€MHz
Bibliography
Figures
Figure€1a – Standard form for statistics on interference complaints recommended for radio services with analogue modulation and fixed or stationary radio reception
Figure€1b – Standard form for statistics on interference complaints recommended for radio services with analogue modulation and mobile or portable radio reception
Figure€1c – Standard form for statistics on interference complaints recommended for radio services with digital modulation and fixed or stationary radio reception
Figure€1d – Standard form for statistics on interference complaints recommended for radio services with digital modulation and mobile or portable radio reception
Figure 1 – Standard forms for statistics on interference complaints
Figure 2 – Model for remote coupling situation derived disturbance field strength eir at receiving distance r
Figure€3 – Model for close coupling situations
Figure€4 – Example of conversion factors – field strength / common-mode voltage (in dB) – at feed point, found in practice
Figure€5 – Example of conversion factors – field strength generated by differential-mode voltage – at feed point, found in practice
Figure€6 – Example of conversion factors – field strength generated by differential-mode voltage – outside buildings and electrical substations, found in practice
Figure€7 – Example of conversion factors – field strength generated by differential-mode voltage – inside buildings, found in practice
Figure A.1 – Mains decoupling coefficient as measured by various authors
Figure A.2 – Median and minimum values of mains decoupling factor for the range 0,1€MHz to 200€MHz
Figure A.3 – Typical distributions of deviations from median value of decoupling factor as indicated in Figure A.2
Figure A.4 – Measurement of the mains decoupling factor
Table 1 – Classification of sources of radio frequency interference and other causes of complaint
Table€2 – Guidance survey of RFI measuring methods
Table€3 – Tabulation of the method of determining limits for equipment in the frequency range 0,150€MHz to 960€MHz
Table 4 – Calculation of permissible limits for disturbances at about 1 800 MHz from existing CISPR limits in the frequency range of 900 MHz
Table€5 – List of radio services, typical parameters, and influence factors
Previous versions
AS/NZS CISPR 16.4.4:2012
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.