AS/NZS 3548:1995

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