GB/T 34995-2017 English PDF

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GB/T 34995-2017: Technical requirements and measurement methods of receiving equipment for time service in single frequency network
Status: Valid

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Basic data

Standard ID: GB/T 34995-2017 (GB/T34995-2017)
Description (Translated English): Technical requirements and measurement methods of receiving equipment for time service in single frequency network
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: M74
Classification of International Standard: 33.160
Word Count Estimation: 16,136
Date of Issue: 2017-11-01
Date of Implementation: 2018-02-01
Regulation (derived from): National Standard Announcement 2017 No. 29
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 34995-2017: Technical requirements and measurement methods of receiving equipment for time service in single frequency network

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical requirements and measurement methods of receiving equipments for time service in single frequency network ICS 33.160 M74 National Standards of People's Republic of China Single frequency network timing receiving equipment technical requirements and measurement methods Posted.2017-11-01 2018-02-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms, definitions and abbreviations 1 3.1 Terms and definitions 1 3.2 Abbreviations 2 4 System Overview 2 5 technical requirements 4 5.1 General Requirements 4 5.2 Functional Requirements 4 5.3 Performance Indicators 5 6 Measurement equipment requirements and measurement methods 6 6.1 Measurement equipment requirements 6 6.2 Measurement Methods 6 Appendix A (Normative) Single-frequency network timing reception device status monitoring signal physical interface and communication protocol 11 Reference 13

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents. This standard is proposed by the State Administration of Press, Publication and Broadcasting. This standard by the National Radio and Television Television Standardization Technical Committee (SAC/TC239) centralized. This standard was drafted by the State Press and Publication Administration of Radio and Television Planning Institute, Aerospace Science and Industry Group, two homes two hundred and three, national news Publishing Bureau of Radio, Radio and Television Authority, Guangxi Zhuang Autonomous Region Press and Publication Bureau, Guangxi Radio and Television Technology Center, Beijing Broadcasting Day Technology Co., Ltd., Shanghai Jiaotong University, Beijing Wu Yan Li Technology Co., Ltd.. The main drafters of this standard. Liu Jun, Cao Zhi, Feng Jingfeng, Dai Ming, Li Guosong, Wang Liang, Yang Xi, Liu Dan, Zhang Rongjian, Zhang Xuming, Li Nan, Zhao Min, Lübailing, Huang Jigang, Liang Yongzhong, Huang Zhiheng, Chang Jiang, Gao Yang, Fan Gang, He Dazhi, Yang Yaguang. Single frequency network timing receiving equipment technical requirements and measurement methods

1 Scope

This standard specifies the GB 20600-2006 terrestrial digital television broadcasting single-frequency network timing receiving equipment, technical requirements and measurement method. Any equivalent measurement method that ensures the same measurement accuracy can also be used. In case of dispute, this standard shall prevail. This standard applies to terrestrial digital television broadcasting single-frequency network timing receiving device (referred to as the receiving device) development, production, acceptance, so that Use, operation and maintenance.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. Digital television terrestrial broadcasting transmission system frame structure, channel coding and modulation 3 Terms, definitions and abbreviations 3.1 Terms and definitions The following terms and definitions apply to this document. 3.1.1 Timing timeservice Pass the standard time in a certain way. 3.1.2 Single Frequency Network singlefrequencynetwork; SFN Digital television coverage network composed of a plurality of transmitters located in different places and in a synchronized state, each transmitter in the network is in phase Same frequency, the same program is transmitted at the same time in order to achieve a reliable coverage of a specific service area. 3.1.3 Frequency tame frequencydiscipline The process of locking the local oscillator frequency to standard frequency. 3.1.4 Frequencyaccuracy The maximum range of frequency deviation, indicating the actual value of the frequency of its relative value of the nominal deviation. 3.1.5 Frequency stability frequencystability After the frequency source preheats for a certain period of time, its frequency reaches a certain actual value, and can maintain this value within a certain time interval The ability to use Allen's standard deviation to characterize. 3.1.6 Timing Accuracy timingaccuracy Receiving device output timing 1pps signal deviation from the standard 1pps signal. Note .1pps refers to the timing receiver device outputs one second pulse per second. ......

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