This standard specifies the energy efficiency limits, energy-saving evaluation values, power testing methods, and inspection rules for general-purpose digital television receivers (also known as set-top boxes, hereinafter referred to as receivers). This standard applies to receivers that operate normally on a 220 V, 50 Hz power grid, including wired receivers, ground receivers, and satellite receivers. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 2829-2002 Sampling Procedures and Tables for Periodic Inspection by Attributes (Applicable to the Inspection of Process Stability) GB/T 14857 Specification for Coding Parameters of Digital Television in Studios GB/T 17700 Satellite Digital Television Broadcasting Channel Coding and Modulation Standards GB/T 17975.1 Information Technology - General Coding of Moving Images and Associated Sound Information - Part 1: System GB/T 17975.2 Information Technology - General Coding of Moving Images and Associated Sound Signals - Part 2: Video GB/T 17975.3 General Coding of Information Technology, Moving Images and Associated Sound Signals - Part 3: Audio GB/T 20600 Digital Television Ground Signal Frame Structure, Channel Encoding and Modulation of Broadcasting Transmission System GB 20943 Single Channel Output AC DC and AC AC External Power Supply Energy Efficiency Limits and Energy Conservation Evaluation Values GD/JN 01 Advanced Broadcasting System Satellite Transmission System Frame Structure, Channel Encoding and Modulation; Safety mode GY/T 155 Video parameter values for high-definition television program production and exchange GY/T 170 Cable digital television broadcasting channel coding and modulation specifications IEC 62087; Methods of measurement for the power consumption of audio, video, and related equipment in 2008
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China