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GY/T 198-2003 (GYT 198-2003)

GY/T 198-2003_English: PDF (GYT198-2003)
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GY/T 198-2003English219 Add to Cart 3 days Specifications and methods of measurement on QAM modulator used in digital cable broadcasting system GY/T 198-2003 Valid GY/T 198-2003

BASIC DATA
Standard ID GY/T 198-2003 (GY/T198-2003)
Description (Translated English) Specifications and methods of measurement on QAM modulator used in digital cable broadcasting system
Sector / Industry Radio, Film & TV Industry Standard (Recommended)
Classification of Chinese Standard M61
Classification of International Standard 33.160
Word Count Estimation 7,780
Date of Issue 2003-12-19
Date of Implementation 2004-02-01
Drafting Organization State Administration of Radio, Film and Television Broadcasting measurement test center
Administrative Organization National Radio and Television Standardization Technical Committee
Summary This standard specifies the compliance GY/T 170-2001 and GY/T 106-1999 cable digital television broadcasting QAM modulator technical requirements and methods of measurement. For the same measurement uncertainty can ensure that any equivalent measurement method can also be used. Dispute should be based on this standard shall prevail. This standard applies to cable digital TV broadcasting QAM modulator development, production, use, and operation and maintenance.

GY/T 198-2003
Specifications and methods of measurement on QAM modulator used in digital cable broadcasting system
GY
Central Republic Radio, Film and Television
Cable Digital TV Broadcasting QAM Modulator
Technical requirements and measurement methods
Specifications and methods of measurement
on QAM modulator used in digital cable broadcasting system
Shi 2.2004-02-01 Real 003-12-19
China National Radio, Film and Television Administration issued standard cloth
Foreword
This standard specifies compliance with GY/T 170-2001 "Code for Cable Digital Television Broadcasting Channel Coding and Modulation" and GY/T 106-1999 "
Technical Specifications and Measurement Methods for Cable Digital TV Broadcasting QAM Modulators of Technical Specifications for Cable TV Broadcasting Systems. Technical requirements of this standard
Referenced the technical parameters of the cable digital TV broadcast QAM modulator at home and abroad, and fully considered the cable digital TV broadcast QAM modulator
Practical application requirements in cable digital television systems.
This standard is under the jurisdiction of the National Radio and Television Standardization Technical Committee.
This standard was drafted. State Administration of Radio, Film and Television Radio and Television Measurement and Testing Center, Zhejiang Radio and Television Technology Co., Ltd.,
Shenzhen Feitong Broadband Technology Co., Ltd., Shenzhen Dirui Computer Technology Co., Ltd.
The main drafters of this standard. Gong Bo, Yao Ruihong, Gao Bin, Yang Xufeng, Li Yang.
Cable Digital TV Broadcasting QAM Modulator
Technical requirements and measurement methods
1 Scope
This standard specifies the technical requirements and testing of QAM modulators for cable digital television broadcasting in compliance with GY/T 170-2001 and GY/T 106-1999.
This standard applies to the research and development, production, use, operation and maintenance of cable digital television broadcast QAM modulators.
2 Normative references
The clauses in the following documents have become the clauses of this standard after being referenced. For dated references, all subsequent
Neither amendments (excluding errata) or revised versions are applicable to this standard, however, parties who have reached an agreement under this standard are encouraged to study
Is the latest version of these files available? For undated references, the latest version applies to this standard.
GY/T 106-1999 Technical Specification for Cable Television Broadcasting System
GY/T 170-2001 Cable Digital TV Broadcasting Channel Coding and Modulation Specification
3 Terms, definitions and abbreviations
3.1 Terms and definitions
The following terms and definitions apply to this standard.
Modulation error ratio
The ratio of the sum of the squares of the nominal vector magnitude to the sum of the squares of the error vector magnitude, expressed in dB.
3.2 Acronyms
The following abbreviations apply to this standard.
ASI Asynchronous Serial Interface
PCR Program Clock Reference
QAM Quadrature Amplitude Modulation
SPI Synchronous Parallel Interface
TS Transport Stream
4 Technical requirements
The technical requirements of the cable digital TV broadcast QAM modulator are shown in Table 1.
Table 1 Technical requirements of cable digital TV broadcast QAM modulator
Remarks on technical indicators of project unit
Input signal frame structure, channel coding
Code and modulation
Should comply with GY/T 170-2001
Regulations
2 Required modulation methods-64-QAM and 256-QAM
3 Output symbol rate range Mbaud 3.6 ~ 6.952 adjustable
4 Input signal interface characteristics-
Should comply with GY/T 170-2001 Appendix A
Provisions
5 Working frequency MHz
Should be in the range of 110MHz ~ 862MHz
Conform to GY/T 106-1999 about frequency
Rate division
6 Carrier frequency deviation kHz ≤ 25
For agile frequency modulators, the highest channel in the operating band should be
Take measurements.
7 Tuning frequency step kHz ≤ 250 Fixed channel modulator is not specified.
8 Maximum output level dBm ≥ -8
For agile