1、 IEC 62087-5 Edition 1.0 2015-06 INTER NA TIONA L STA NDA R D Audio,video and related equipment Determination of pow er consumption Part 5:Set top box es(STB)IEC 62087-5:2015-06(en)c olourinsideCopyright International Electrotechnical Commission THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015
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11、L STA NDA R D A udio,video and related equipment Determination of pow er consumption Part 5:Set top box es(STB)INTER NA TIONAL ELECTROTECHNICAL COMMISSION ICS 33.160.10 ISBN 978-2-8322-2685-8 Registered t rademark of t he Int ernational Electrot echnical Commission W arning!Make sure that you obtain
12、ed this publication from an authorized distributor.c olourinsideCopyright International Electrotechnical Commission 2 IEC 62087-5:2015 IEC 2015 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references.6 3 Terms,definitions and abbreviations.6 3.1 Terms and definitions.6 3.2 Abbreviations.
13、8 4 Specification of operating modes and functions.8 4.1 General.8 4.2 Auto power down function.8 5 Measuring conditions for set top boxes(STBs).9 5.1 Overview of a set top box.9 5.2 Input signal.10 5.2.1 General.10 5.2.2 RF test signal.10 5.2.3 Broadband input signal.10 5.3 Input terminals.11 5.3.1
14、 Analogue terrestrial input terminal.11 5.3.2 Cable television input terminal.11 5.3.3 Digital terrestrial input terminal.11 5.3.4 Satellite input terminal.11 5.4 Measurement procedure.11 5.4.1 General measuring conditions.11 5.4.2 Stabilization.11 5.4.3 Environmental conditions.11 5.4.4 Setup.11 5.
15、4.5 Power measurements.12 Annex A(informative)General information on STB technology.15 A.1 General.15 A.2 Background on STB technology.15 A.3 Testing recording and time shift functions.16 Bibliography.18 Figure 1 Auto power down function.14 Figure A.1 Block diagram of the common functional parts of
16、an STB.15 Figure A.2 Time shift recording with single tuner.16 Figure A.3 Single tuner multifunction record and playback.16 Table 1 Operating modes and functions.9 Table 2 Matrix for multituner STBs.13 Copyright International Electrotechnical Commission IEC 62087-5:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ AUDIO,VIDEO AND RELATED EQUIPMENT DETERMINATION OF POWER CONSUMPTION Part 5:Set top boxes(STB)FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide orga
