GB/T 28438.1-2012Objective assessment and measurement methods for coverage of digital terrestrial television broadcasting signals - Part 1: Outdoor fixed reception (English PDF)
地面数字电视广播信号覆盖质量客观评估和测量方法 第1部分：室外固定接收
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
June 29, 2012
Implementation date
October 1, 2012
Scope
GB/T 28438.1-2012 is the English-translated version of 地面数字电视广播信号覆盖质量客观评估和测量方法 第1部分：室外固定接收.
GB/T 28438.1-2012 is the Chinese standard "Objective assessment and measurement methods for coverage of digital terrestrial television broadcasting signals - Part 1: Outdoor fixed reception".
Its scope clause reads: This section GB/T 28438 regulations in line with GB 20600-2006 terrestrial digital television broadcasting system fixed outdoor reception signal Objective assessment and measurement of the quality of coverage for any equivalent measure to ensure that the same method of measurement uncertainty can also be used.
When the dispute, this section shall prevail. This section applies to digital terrestrial television broadcasting outdoor fixed reception. Its clauses include terms and definitions.
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Document preview — GB/T 28438.1-2012
National Standard of the People's Republic of China
- ICS
- 33.160
- Classification
- M 60
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Quality assessment requirements
- 5 Measurement
- 6 to simplify the evaluation and measurement methods
- Appendix A (informative) Antenna measurement calibration coefficients (reference antenna method)
1 Scope
This section GB/T 28438 regulations in line with GB 20600-2006 terrestrial digital television broadcasting system fixed outdoor reception signal
Objective assessment and measurement of the quality of coverage for any equivalent measure to ensure that the same method of measurement uncertainty can also be used.
When the dispute, this section shall prevail.
This section applies to digital terrestrial television broadcasting outdoor fixed reception.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 14109-1993 TV, FM radio field strength measurement
GB 20600-2006 digital terrestrial television broadcasting transmission system frame structure, channel coding and modulation
GB/T 26252-2010 VHF/UHF band terrestrial digital TV broadcasting frequency planning criteria
GB/T 26666-2011 digital terrestrial television broadcasting transmission systems Implementation Guide
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Cliff Effect
Digital TV reception from success to failure quickly hopping phenomenon.
3.2 Signal margin
The successful reception of the position to meet the conditions of the minimum signal level difference between the signal level of a measuring position.
3.3 Time probability
In the continuous measurement of a defined time period, any of the measurement locations on a signal strength reaches or exceeds a given time value with respect to the measurement
Percentage between.
3.4 Location probability
(Typically 100m × 100m) a position within a specific measuring different measurement region, a strong signal field energy reaches or exceeds a given value
Location percentage.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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