GB/T 26685-2011 in English

《GB/T 26685-2011地面数字电视接收机测量方法》由TC242（全国音频、视频及多媒体系统与设备标准化技术委员会）归口，主管部门为工业和信息化部（电子）。

1 Scope
This standard specifies the performance measurement items, measurement conditions and measurement method of digital terrestrial television receiver (hereinafter referred to as receiver) that supports digital terrestrial television reception function specified in GB 20600-2006.
This standard is applicable to standard definition (SD) and high definition (HD) digital terrestrial television receivers that support digital terrestrial television reception function specified in GB 20600-2006.
2 Normative References
The following documents are essential for the application of this Standard. For the dated normative references, only the dated editions are applicable to this document. For the undated references, the latest editions of the normative documents (including all the amendments) are applicable to this document.
GB/T 3174 Characteristics of PAL-D Television Broadcasting System
GB 3659 Methods of Measurement of Television Video Channel
GB/T 17975.1 Information Technology - Generic Coding of Moving Picture and Associated Audio Information - Part 1: System (GB/T 17975.1-2010, ISO/IEC 13818-1:2007, MOD)
GB/T 17975.2-2000 Information Technology - Generic Coding of Moving Picture and Associated Audio Information - Part 2: Video (ITU-TH, 262: 1995, IDT)
GB/T 17975.3-2002 Information Technology - Generic Coding of Moving Picture and Associated Audio Information - Part 3: Audio (ISO/IEC 13818-3:1998, IDT)
GB/T 20090.2-2006 Information Technology - Advanced Coding of Audio and Video - Part 2: Video
GB 20600-2006 Framing Structure, Channel Coding and Modulation for Digital Television Terrestrial Broadcasting System
GB/T 22726-2008 Specification for Multichannel Digital Audio Coding Technology
GB/T 26270-2010 Standard Test Signals for Digital Television Receiving Equipment
SJ/T 11157-1998 Methods of Measurement on Receivers for Television Broadcast Transmissions - Part 2: Electrical Measurements on Audio Channels Methods in General and Those for Monophonic Channels
SJ/T 11180-1998 Basic Methods of Measurement of Digital Audio Characteristics of Audio and Audiovisual Equipment
SJ/T 11324-2006 Terminology of Digital Television Receiving Equipment
SJ/T 11345-2006 Methods of Measurement for Digital Television Cathode Ray Tube Displays
SJ/T 11348-2006 Methods of Measurement for Digital Television Flat Panel Displays
3 Terms, Definitions and Acronyms
3.1 Term and Definition

Contents
1 Scope
2 Normative References
3 Terms, Definitions and Acronyms
3.1 Term and Definition
3.2 Acronyms
4 Basic Requirements on Measurement
4.1 General Description
4.2 Test Signal
4.4 Standard Measuring Conditions
5 Measurement Items and Method
5.1 System Chart
5.2 Requirements on RF Demodulation and Channel Decoding
5.3 Requirements on Demultiplexing
5.4 Requirements on Transport Stream Decoding
5.5 Requirements on Video Characteristics
5.6 Requirements on Audio Characteristic
5.7 Requirements on Power Adaptability
5.8 Whole-set Power Consumption
5.9 Standby power consumption
5.10 Requirements on Functions
Appendix A (Normative) Multipath Channel Model
Appendix B (Normative) Acceptable Error Free