1 Scope
This standard specifies the technical requirements and measurement methods for VHF and UHF frequency band digital terrestrial television broadcasting exciters as specified in GB 20600-2006. Any equivalent method ensuring the same measurement uncertainty may also be adopted. In case of any dispute, this standard shall prevail.
This standard is applicable to the design, production, use, operation and maintenance of VHF and UHF frequency band digital terrestrial television broadcasting exciters.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB 20600-2006 Framing Structure, Channel Coding, and Modulation for Digital Television Terrestrial Broadcasting System (DTMB)
GB/T 14433-1993 Technical Specifications for Coverage Networks of Color TV Broadcasting
GY/T 229.1-2008 Technical Specifications and Methods of Measurement for Digital Terrestrial Television Broadcasting Single Frequency Network Adapter
3 Terms, Definitions, Abbreviations and Symbols
3.1 Term and Definitions
For the purposes of this standard, the following terms and definitions apply.
3.1.1 Frequency Synthesis
The frequency signal for accuracy and stability equivalent to the reference frequency and obtained through adding, subtracting, multiplying and dividing the reference frequency.
3.1.2 Effective Bandwidth
The difference between high-end and low-end frequencies corresponding to 3dB signal center frequency amplitude reduction.
Foreword I
1 Scope
2 Normative References
3 Terms, Definitions, Abbreviations and Symbols
3.1 Term and Definitions
3.2 Abbreviations
3.3 Symbols
4 Technical Requirements
4.1 General
4.2 General Requirements
4.3 Functional Requirements
4.4 Performance Requirements
5 Measurement Methods
5.1 Operating Mode
5.2 Operating Frequency
5.3 Frequency Accuracy
5.4 Frequency Stability
5.5 Output Power
5.6 Output Power Stability
5.7 RF Effective Bandwidth
5.8 Roll-off Factor
5.9 Signal Shoulder Attenuation
5.10 Inband Spectrum Ripple
5.11 Adjacent Channel Inband Unwanted Emission Power
5.12 Adjacent Channel out of Band Unwanted Emission Power
5.13 Phase Noise
5.14 Peak Average Power Ratio
5.15 Modulation Error Ratio
5.16 SFN Delay Adjustment Scope
Appendix A (Informative Appendix) Operating Parameters of Digital Terrestrial Television Broadcasting System
