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GB/T 26681-2011: Technical requirements and methods of measurement for standard testing transmitter of digital terrestrial television
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GB/T 26681-2011: Technical requirements and methods of measurement for standard testing transmitter of digital terrestrial television

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Technical requirements and methods of measurement for standard testing transmitter of digital terrestrial television ICS 17.220 L85 National Standards of People's Republic of China Terrestrial digital TV standard test transmitter Technical requirements and methods of measurement Issued on. 2011-06-16 2011-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions, abbreviations 1 3.1 Terms and definitions 3.2 Abbreviations 2 4 2 Technical Requirements 4.1 General Requirements 2 4.2 Performance Requirements 3 5 Test Method 4 5.1 Test Conditions 4 5.2 measuring device 5 5.3 Working Mode 5 5.4 Frequency adjustment step 6 Center frequency stability of 5.5 6 5.6 center frequency accuracy 6 5.7 harmonic oscillator and clutter 7 5.8 oscillator phase noise 7 5.9 Shoulder 8 5.10 band spectrum unevenness 8 5.11 9 modulation error rate Stability of output power 10 5.12 5.13 output power accuracy 10 5.14 output load impedance voltage standing wave ratio 10 Appendix A (normative) terrestrial digital television broadcasting system maximum net rate 12 Appendix B (normative) Table of Frequency Allocations 13 TV channels

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This standard by the National Standardization Technical Committee Electronic Measuring Instruments (SAC/TC242) centralized. This standard drafting units. China Electronics Standardization Institute, Shenzhen match West Information Technology Co. (Electronic Information Products Standard Quasi National Engineering Laboratory), Shanghai Jiaotong University, Tsinghua University, the national digital audio, video and multimedia products for Quality Supervision and Inspection Center, four Chuan Chuanjia Electronics Co., Ltd., Jiangsu Luyang Electronic Instrument Group Co., Ltd. of Japan Chi measurement, Rohde & Schwarz China Limited Division, Agilent Technologies, Inc., Beijing Legend Technology Co., Ltd., China. The main drafters of this standard. Hu Peng, Chenren Wei, Dai Yang, Pan Changyong, Li Li, Jiao Yang, Tian Jianbo, Qian Yu, room Haidong. Terrestrial digital TV standard test transmitter Technical requirements and methods of measurement

1 Scope

This standard specifies the line with GB 20600-2006 standard for terrestrial digital TV test transmitter (hereinafter referred to as the test transmitter) skills Surgery and methods of measurement. This standard applies to GB 20600-2006 standard for terrestrial digital TV test transmitter, NA terrestrial digital TV broadcasting transmitter.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 11313.2-2007 RF connectors - Part 2. RF coaxial connectors 9.52 specification (IEC 61169-2. 2001, IDT) GB/T 11313.4-2007 RF connectors - Part 4. inner diameter of outer conductor 16mm (0.63in), characteristic impedance 50Ω, threaded connection RF coaxial connectors (7-16) (IEC 60169-4. 1975, NEQ) GB/T 17975.1-2000 Information technology - Generic coding of moving pictures and associated audio information - Part 1. System (ISO / IEC 13818-1.2007, MOD) GB 20600-2006 digital television terrestrial broadcasting system frame structure, channel coding and modulation GB/T 26682-2011 standard terrestrial digital TV test receiver technical requirements and methods of measurement SJ/T 11324-2006 digital television receivers term SJ/T 11328-2006 digital television receiving equipment interface specification - Part 2. Transport Stream Interface 3 Terms and definitions, abbreviations 3.1 Terms and Definitions SJ/T 11324-2006 define the following terms and definitions apply to this document. 3.1.1 Shoulder shoulderattenuation From the center frequency of a predetermined value of the average power band frequencies relative to the amount of change in center frequency, in decibels (dB). 3.1.2 Mode operationmode In line with GB 20600-2006 predetermined combination of different parameters, including the number of carriers, forward error correction code rate, symbol constellation mapping mode, frame Head and symbol interleaving mode options. 3.1.3 Modulation error rate modulationerrorratio Modulated signal ideal symbol vector magnitude squared and squared symbol error vector magnitude and the ratio in decibels (dB). ...