1 Scope
This standard specifies the measuring conditions, electric property measurement items and measurement methods of digital terrestrial set-top box (hereinafter referred to as set-top box or SB) 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 set-top boxes 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 3659-1983 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 Information Technology - Generic Coding of Moving Picture and Associated Audio Information - Part 2: Video (ITU-TH, 262: 1995, IDT)
GB/T 17975.3 Information Technology - Generic Coding of Moving Picture and Associated Audio Information - Part 3: Audio (ISO/IEC 13818-3:1998, IDT)
GB 20600-2006 Framing Structure, Channel Coding and Modulation for Digital Television Terrestrial Broadcasting System
GB/T 22122-2008 Methods of Measurement of Surround Audio for Digital TV
GB/T 26685-2011 Methods of Measurement for Digital Terrestrial Television Set-top box
GB/T 26270-2010 Standard Test Signals for Digital Television Receiving Equipment
SJ/T 11324-2006 Terminology of Digital Television Receiving Equipment
3 Terms, Definitions and Acronyms
3.1 Term and Definition
For the purpose of this Standard, the following terms and definitions and the ones in SJ/T 11324-2006 apply.
3.1.1
Acceptable error free
Error code events that are not corrected within the specified time are less than a certain threshold during the signal reception process
Contents
1 Scope
2 Normative References
3 Terms, Definitions and Acronyms
3.1 Term and Definition
3.2 Abbreviation
4 Basic Requirements on Measurement
4.1 General
4.2 Test Signal
4.3 Measurement System and Instrument
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 Transport Stream Decoding Characteristics
5.4 Requirements on Baseband Video Output Performance
5.5 Audio Output Characteristic
5.6 Requirements on Functions
5.7 Requirements on Power Adaptability
5.8 Power Consumption
5.9 Standby Power Consumption
Appendix A (Normative) Multipath Channel Model
Appendix B (Normative) Acceptable Error Free
