AS/NZS 3548:1995
Limits and methods of measurement of radio disturbance characteristics of information technology equipment
Specifies limits of electromagnetic emissions in the frequency range 9 kHz to 400 GHz from information technology equipment and provides methods for the measurement of those emissions. It is one of a series of Standards specifying limits and measurement techniques to control electromagnetic interference. This standard is identical to and reproduced from IEC/CISPR 22:1993.
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AS/NZS 3548:1995 LIMITS AND METHODS OF MEASUREMENT OF RADIO DISTURBANCE CHARACTERISTICS OF INFORMATION TECHNOLOGY EQUIPMENT
PREFACE
CONTENTS
INTRODUCTION
1 Scope and object
2 Normative references
3 Definitions
3.1 Information Technology Equipment (ITE)
3.2 equipment under test (EUT)
3.3 host unit
3.4 module
3.5 identical modules and ITE
4 Classification of ITE
4.1 Class B ITE
4.2 Class A ITE
5 Limits for conducted disturbance
5.1 Limits for conducted disturbance at mains ports
5.2 Limits for conducted disturbance at telecommunication ports
6 Limits for radiated disturbance
7 Limits for disturbance power
8 Interpretation of CISPR radio disturbance limit
8.1 Significance of a CISPR limit
8.2 Application of limits in ests for conformity of equipment in series production
9 General measurement conditions
9.1 EUT configuration
9.1.1 Determination of maximum emission configuration(s)
9.1.2 EUTconfiguration with ground-plane
9.2 Operation of the equipment under test (EUT)
9.2.1 Operation of visual display units
9.2.2 Operation of facsimile devices
9.2.3 Operation of telephone sets
10 Method of measurement of conducted disturbance at mains ports
10.1 Measuring receivers
10.2 Artificial Mains Network (AMN)
10.3 Ground-plane
10.4 Equipment set-up for conducted disturbance measurements
10.5 Recording of conducted disturbance measurements
11 Method of measurement of radiated disturbance
11.1 Measuring receivers
11.2 Antenna
11.2.1 Antenna-to-EUT distance
11.2.2 Antenna-to-ground distance
11.2.3 Antenna-to-EUT azimuth
11.2.4 Antenna-to-EUTpolarization
11.3 Measurement site for radiated disturbance measurements
11.3.1 General
11.3.2 Site attenuation measurements
11.3.3 Open-area test site
11.3.4 Conducting ground-plane
11.3.5 Alternative test sites
11.3.6 User installation testing
11.4 Equipment set up for radiated disturbance tests
11.5 Recording of radiated disturbance measurements
11.6 Measurement in the presence of high ambient signals
12 Measurement of disturbance power
Annex A - Site attenuation measurements of alternative test sites
A.1 Method of measurement of site attenuation
A.1.1 Vertical polarization
A.1.2 Horizontal polarization
A.2 References
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AS/NZS 3548:1995 LIMITS AND METHODS OF MEASUREMENT OF RADIO DISTURBANCE CHARACTERISTICS OF INFORMATION TECHNOLOGY EQUIPMENT
PREFACE
CONTENTS
INTRODUCTION
1 Scope and object
2 Normative references
3 Definitions
3.1 Information Technology Equipment (ITE)
3.2 equipment under test (EUT)
3.3 host unit
3.4 module
3.5 identical modules and ITE
4 Classification of ITE
4.1 Class B ITE
4.2 Class A ITE
5 Limits for conducted disturbance
5.1 Limits for conducted disturbance at mains ports
5.2 Limits for conducted disturbance at telecommunication ports
6 Limits for radiated disturbance
7 Limits for disturbance power
8 Interpretation of CISPR radio disturbance limit
8.1 Significance of a CISPR limit
8.2 Application of limits in ests for conformity of equipment in series production
9 General measurement conditions
9.1 EUT configuration
9.1.1 Determination of maximum emission configuration(s)
9.1.2 EUTconfiguration with ground-plane
9.2 Operation of the equipment under test (EUT)
9.2.1 Operation of visual display units
9.2.2 Operation of facsimile devices
9.2.3 Operation of telephone sets
10 Method of measurement of conducted disturbance at mains ports
10.1 Measuring receivers
10.2 Artificial Mains Network (AMN)
10.3 Ground-plane
10.4 Equipment set-up for conducted disturbance measurements
10.5 Recording of conducted disturbance measurements
11 Method of measurement of radiated disturbance
11.1 Measuring receivers
11.2 Antenna
11.2.1 Antenna-to-EUT distance
11.2.2 Antenna-to-ground distance
11.2.3 Antenna-to-EUT azimuth
11.2.4 Antenna-to-EUTpolarization
11.3 Measurement site for radiated disturbance measurements
11.3.1 General
11.3.2 Site attenuation measurements
11.3.3 Open-area test site
11.3.4 Conducting ground-plane
11.3.5 Alternative test sites
11.3.6 User installation testing
11.4 Equipment set up for radiated disturbance tests
11.5 Recording of radiated disturbance measurements
11.6 Measurement in the presence of high ambient signals
12 Measurement of disturbance power
Annex A - Site attenuation measurements of alternative test sites
A.1 Method of measurement of site attenuation
A.1.1 Vertical polarization
A.1.2 Horizontal polarization
A.2 References
Previous versions
AS/NZS 3548:1995
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.