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GB/T 26686-2017: General specification for digital terrestrial television receiver
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General specification for digital terrestrial television receiver
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Basic data | Standard ID | GB/T 26686-2017 (GB/T26686-2017) | | Description (Translated English) | General specification for digital terrestrial television receiver | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | M74 | | Classification of International Standard | 33.160.25 | | Word Count Estimation | 62,623 | | Date of Issue | 2017-09-07 | | Date of Implementation | 2018-04-01 | | Older Standard (superseded by this standard) | GB/T 26686-2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic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 26686-2017: General specification for digital terrestrial television receiver---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.
General specification for digital terrestrial television receiver
ICS 33.160.25
M74
National Standards of People's Republic of China
Replace GB/T 26686-2011
General specification for terrestrial digital television receivers
Published on.2017-09-07
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and definitions, symbols, abbreviations 2
3.1 Terms and Definitions 2
3.2 Symbol 2
3.3 Abbreviations 2
4 General requirements 3
4.1 Normal use conditions 3
4.2 Graphic symbols for equipment 3
4.3 Appearance and structural requirements 3
4.4 Interface Requirements 3
5 Technical requirements 4
5.1 Overview 4
5.2 RF Demodulation and Channel Decoding Requirements 4
5.3 Demultiplexing requirements 10
5.4 Transport Stream Decoding Requirements 10
5.5 Audio and video characteristics requirements 13
5.6 Power Adaptability Requirements 16
5.7 Functional Requirements 16
5.8 Remote Control Performance and Remote Transmitter Requirements 19
5.9 Electromagnetic compatibility characteristics limit 19
5.10 Security Requirements 19
5.11 Reliability Requirements 19
5.12 Environmental Test Requirements 19
5.13 Unpacking Inspection Requirements 19
5.14 Process Assembly Inspection Requirements 19
6 Measurement method 20
6.1 Graphic symbols, appearance and structure of equipment, interface inspection method 20
6.2 RF Demodulation and Channel Decoding Measurement Method 20
6.3 Demultiplexing measurement method 20
6.4 Transport Stream Decoding Measurement Method 21
6.5 Audio and video characteristics measurement method 21
6.6 Power Adaptability Measurement Method 22
6.7 Function measurement method 23
6.8 Remote control performance and measurement methods for remote transmitters 23
6.9 Electromagnetic compatibility characteristics limit measurement method 24
6.10 Safety test method 24
6.11 Reliability Test Method 24
6.12 Environmental test methods 24
6.13 Unpacking inspection method 24
6.14 Process Assembly Inspection Method 24
7 Inspection rules 24
7.1 Type test 24
7.2 Settlement inspection 26
7.3 Routine inspection 28
8 Marking, packaging, transportation, storage 29
8.1 Mark 29
8.2 Packing 29
8.3 Transportation 30
8.4 Storage 30
Appendix A (Normative) Acceptable Errors 31
Appendix B (informative) Radio Frequency VHF and UHF Band Frequency Allocation Table 32
Appendix C (Normative) Multipath Channel Model 34
Appendix D (informative) Other multipath channel models 41
Appendix E (Normative) Remote Control Transmitter Function 46
Appendix F (normative appendix) Unpacking inspection content and non-conformity criteria 47
Appendix G (normative appendix) Process assembly inspection content and non-conformity criteria 50
Appendix H (Normative Appendix) Contents of normal temperature performance test and failure criteria 51
Appendix I (Normative Appendix) Environmental Test Contents and Disqualification Criteria 53
Reference 55
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 26686-2011 "General Specification for Terrestrial Digital Television Receiver", this standard is in line with GB/T 26686-2011
In addition to the editorial changes, the main technical changes are as follows.
--- Terms and definitions, symbols, abbreviations add "symbols" (see 3.2);
--- RF demodulation and channel decoding requirements to increase "operating mode 8", "working mode 9" and "working mode 10" (see 5.2.3);
--- RF demodulation and channel decoding requirements to increase the "suppression of two-path long-echo ability" (see 5.2.16), "suppress three-path long-echo ability" (see
5.2.17), “Suppress channel disturbance capability 1 under fixed reception conditions” (see 5.2.18), “Suppress channel disturbance under fixed reception conditions”
Capability 2” (see 5.2.19), “Suppression of single-frequency interference capability” (see 5.2.20) and “Other multipath models” (see 5.2.21);
--- Video decoding basic requirements removed "Receiver response to comply with GB/T 17975.2-2000 or GB/T 20090.2-2006
The specified frame rate is required to decode the code stream of 25 Hz, 4.3 and 16.9 aspect ratios (see.2011 version 5.5.1.1.1);
Added "The receiver should respond to the code with the frame rate of 25Hz, 4.3 and 16.9 in accordance with GB/T 20090.16.
Streams are decoded and meet the requirements of SJ/T 11594.1-2016" and "Receivers can be specified for other mainstream video coding standards
The video stream is normally decoded" (see 5.5.1.1.1);
--- Audio decoding basic requirements removed "The receiver should have decoding conform to MPEG-1 layer II in GB/T 17975.3-2002 or
The function of the digital audio stream specified in GB/T 22726-2008 can be decoded to meet the requirements of ETSITS102366.
Requirements for the functionality of digital audio streams or other digital audio streams (see.2011 version 5.5.2.1); added "receiver response"
The digital audio stream specified in GB/T 22726 is decoded and complies with the requirements of SJ/T 11594.2-2016" and "received"
The machine can normally decode the audio stream specified by other mainstream audio coding standards" (see 5.5.2.1);
--- Removed "Conditional Reception and Digital Content Protection" (see 5.4.4 of the.2011 edition);
--- Deleted Table 20, Table 21 and Table 22 of the video display feature requirements (see 5.5.1.2.2 of the.2011 edition);
--- Removed the conditional access interface of Appendix C (informative) (see Appendix C of the.2011 edition);
--- Added Appendix B (informative) radio frequency TV VHF and UHF frequency allocation table (see Appendix B), Appendix C (Specification
Addendum) Multipath channel model (see Appendix C), Appendix D (informative) other multipath channel models (see Appendix D).
Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents.
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Audio, Video and Multimedia Systems and Equipment (SAC/TC242).
This standard is mainly drafted by. China Electronics Technology Standardization Research Institute, National Digital Audio Video and Multimedia Product Quality Supervision and Inspection
Xin, Shenzhen Digital TV National Engineering Laboratory Co., Ltd., TCL Group Co., Ltd., Sichuan Changhong Electric Co., Ltd.
Division, Qingdao Hisense Electric Co., Ltd., Qingdao Haier Electronics Co., Ltd., Shenzhen Skyworth-RGB Electronics Co., Ltd., BOE Technology
Group Co., Ltd., Nanjing Panda Electronics Co., Ltd., Tsinghua University, Gaotuo Xunda (Beijing) Technology Co., Ltd., Shanghai HD
Word Technology Industry Co., Ltd., Beijing Haier IC Design Co., Ltd., Beijing Zhongtian Lianke Technology Co., Ltd., Hangzhou Guoxin Technology Co., Ltd.
Co., Ltd., Shenzhen Lihe Microelectronics Co., Ltd., Guangzhou Guangsheng Digital Technology Co., Ltd., Shenzhen Core Technology Co., Ltd., En
Zhipu Semiconductor (Shanghai) Co., Ltd., Ruidikechuang Microelectronics (Beijing) Co., Ltd., Mailing (Shanghai) Microelectronics Co., Ltd., Guangzhou Vision
Electronic Technology Co., Ltd., Jiangsu Yinhe Electronics Co., Ltd., National Radio and Television Product Quality Supervision and Inspection Center, Industry and Letter
The Fifth Institute of Electronics of the Ministry of Information, Shanghai Digital TV National Engineering Research Center Co., Ltd., Beijing Digital TV Engineering Laboratory Co., Ltd.
Division, Beijing Taihe Zhiyuan Technology Co., Ltd., Shenzhen Haisi Semiconductor Co., Ltd., Jiangsu Province, electronic information product quality supervision and inspection research
Institute, Morningstar Software R&D (Shenzhen) Co., Ltd., Lejin Electronic Research and Development Center Co., Ltd., Tianjin Samsung Electronics Co., Ltd., Nanjing Sharp
Electronics Co., Ltd., Shandong Matsushita Electronic Information Co., Ltd., Shanghai Suoguang Imaging Co., Ltd., Lianfa Technology (Hefei) Co., Ltd., Samsung
Letter Technology Research Co., Ltd., Rohde & Schwarz (China) Technology Co., Ltd.
The main drafters of this standard. Hu Peng, Chen Renwei, Chang Lin, Han Qiufeng, Wan Dong, Wang Wei, Li Yining, Zhang Linjuan, Wu Wei, Li Wei, Sun Runyu,
Pan Changyong, Jia Wei, Liang Weiqiang, Qiang Hui, Yang Guang, Feng Xianghui, Chen Liheng, Xu Wei, Niu Xiaoru, Guo Xiancheng, Han Wenquan, Wang Hongxin, Zhang Jingping,
Zhong Zhiyang, Lu Guobing, Jia Kai, Cheng Yang, Zhu Xianliang, Yin Huiqing, Fang Haidong, Shi Yi, Wan Minyong, Han Wenfang, Lin Weifeng, Cao Yu, Yang Xing, Lu Gang,
Su Yukun, Liu Yi, Liu Ansheng, Hu Haining, Zhang Wei.
The previous versions of the standards replaced by this standard are.
---GB/T 26686-2011.
General specification for terrestrial digital television receivers
1 Scope
This standard specifies terrestrial digital television receivers that support the terrestrial digital television reception function of GB 20600-2006 (hereinafter referred to as
Function and performance requirements, measurement methods, inspection rules, marking, packaging, transportation, storage, etc.
This standard applies to 66cm (26in) or more terrestrial digital TV receivers, 66cm (26in) and below receivers are used for reference.
The main basis for product design, production, and inspection.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 191 packaging storage and transportation icon
GB/T 2828.1-2012.Sampling procedures for sampling by sampling - Part 1 . Batch-by-batch inspections by Retrieving Quality of Acceptance (AQL)
plan
GB/T 2829-2002 Periodic inspection count sampling procedures and tables (applicable to the inspection of process stability)
GB/T 5465.2 Graphical symbols for electrical equipment - Part 2. Graphical symbols
GB 8898 Safety requirements for audio, video and similar electronic equipment
GB/T 9383 Sound and television broadcast receivers and related equipment immunity limits and methods of measurement
GB/T 13000-2010 Information Technology General Multi-Bit Coded Character Set (UCS)
GB/T 13837 Limits and methods of measurement of radio disturbance characteristics for sound and television broadcast receivers and related equipment
Technical requirements and measurement methods for infrared remote control transmitters for GB/T 14960 television broadcast receivers
GB 17625.1 Electromagnetic compatibility limit harmonic current emission limit (device input current per phase ≤ 16A)
GB/T 17975.1 Information technology - Generic coding of moving pictures and associated audio information - Part 1
GB/T 20090.16 Advanced audio and video coding for information technology - Part 16. Radio and video
GB 20600-2006 Digital TV terrestrial broadcasting transmission system frame structure, channel coding and modulation
GB/T 22122-2008 Digital TV surround sound sound measurement method
GB/T 22726 multi-channel digital audio codec technical specification
GB 24850 flat panel TV energy efficiency limit value and energy efficiency rating
GB/T 26685-2017 Ground digital television receiver measurement method
GB/T 28160-2011 Digital TV Broadcasting Electronic Program Guide Specification
GB/T 28161-2011 Digital TV broadcasting service information specification
SJ/T 10514-1994 Technical requirements and measurement methods for infrared remote control parts of television broadcast receivers
SJ/T 10919-1996 Color TV broadcast receiver packaging
SJ/T 11324-2006 Digital TV receiving equipment terminology
SJ/T 11325 Digital TV receiving and display equipment reliability test method
SJ/T 11326 Digital TV receiving and display equipment environmental test method
SJ/T 11327-2006 Digital television receiver interface specification - Part 1. Radio
SJ/T 11329-2006 Digital television receiver interface specification - Part 3. Composite video signal interface
SJ/T 11330-2006 interface specification for digital television receivers - Part 4. s.
SJ/T 11331-2006 Digital television receiver interface specification - Part 5. Analog audio signal interface
SJ/T 11332-2006 interface specification for digital television receivers - Part 6. RGB analog primary video signal interface
SJ/T 11333-2006 Digital television receiver interface specification - Part 7. YPBPR analog component video signal interface
SJ/T 11594.1-2016 Digital TV receiving terminal audio and video decoding technical requirements and measurement methods - Part 1. Video
(AVS)
SJ/T 11594.2-2016 Digital television receiver terminal audio and video decoding technical requirements and measurement methods - Part 2. Audio
(DRA)
3 Terms and definitions, symbols, abbreviations
3.1 Terms and definitions
The following terms and definitions as defined by SJ/T 11324-2006 apply to this document.
3.1.1
Acceptable error acceptablefreefree
The error event that was not corrected within the specified time during signal reception is less than a certain threshold.
3.2 symbol
The following symbols apply to this document.
tD, MAX. This standard specifies the 0dB maximum echo delay that the receiver should be able to withstand.
3.3 Abbreviations
The following abbreviations apply to this document.
AEF---acceptable error (AcceptableErrorFree);
C/N---carrier-Noiseatio;
EIT---Event Information Table (EventInformationTable);
EITp/f---current/follow-up event table (EITpresent/folowing);
EPG---Electronic Program Guide (Electronic Program Guide);
ES---Elementary Stream (ElementaryStream);
FS---Full Scale (FulScale);
HDTV---High Definition TV (High Definition TV);
ID---Identification;
LFE---Low Frequency Enhancement Channel (LowFrequencyEnhancement);
NIT---Network InformationTable;
PAT---Program Association Table (ProgramAssociationTable);
PCM---Pulse Code Modulation;
PCR---Program Clock Reference (ProgramClockReference);
PES---Packetized Elementary Stream (Packetized Elementary Stream);
PID---Packet Identifier;
PMT---Program Map Table (ProgramMapTable);
PSI---Program Specific Information (ProgramSpecificInformation);
PTS---display time stamp (PresentationTimeStamp);
QAM---Quadrature Amplitude Modulation;
RF---Radio Frequency (RadioFrequency);
SDT---Service DescriptionTable (ServiceDescriptionTable);
SDTV---Standard Definition Television (Standard Definition Television);
SI---Service Information (ServiceInformation);
STC---System Clock (SystemTimeClock);
TDT---Time and DateTable (TimeandDateTable);
TOT---Time Offset Table (TimeOffsetTable);
UHF---UltraHigh Frequency (UltraHighFrequency);
UTC---Universe TimeCo-ordinated;
VHF---Very High Frequency (VeryHighFrequency);
Y/C---Luminance/Chrominance.
4 General requirements
4.1 Normal use conditions
The normal use conditions should meet the following requirements.
Ambient temperature. 5 ° C ~ 35 ° C;
Relative humidity. 25%~80%;
Atmospheric pressure. 86kPa~106kPa;
Power supply. 220V 10%-20%, 50×(1±2%) Hz.
4.2 Graphic symbols for equipment
Graphic symbols shall comply with the relevant provisions of GB/T 5465.2.
Graphic symbols not defined in GB/T 5465.2, as specified by the product standard.
4.3 Appearance and structural requirements
The appearance of the receiver should be neat and tidy. There should be no defects such as uneven marks, scratches, cracks, burrs, mildew spots on the surface. The surface coating should not be foamed or cracked.
Fall off and so on.
Metal parts should not be corroded and other mechanical damage, and the infusion should not overflow.
The operation of switches, buttons and knobs should be flexible and reliable, and the parts should be tightened without looseness. The machine should have sufficient mechanical stability.
The characters and graphic symbols of the function shall be correct, clear, correct and firm, and the instructions shall be correct.
4.4 Interface Requirements
The interface requirements are shown in Table 1.
Table 1
Serial number interface type requires interface technical requirements
1 RF input must be in accordance with the requirements of SJ/T 11327-2006
2 RF loop output can be selected according to the requirements of SJ/T 11327-2006
Composite video signal input can be selected according to the requirements of SJ/T 11329-2006
Y/C input can be selected according to the requirements of SJ/T 11330-2006
Table 1 (continued)
Serial number interface type requires interface technical requirements
Y, PB, PR input can be selected according to the requirements of SJ/T 11333-2006
R, G, B input can be selected according to the requirements of SJ/T 11332-2006
4 Audio input/output (two channels) Optional according to the requirements of SJ/T 11331-2006
5 small D-shaped 15-pin VGA input can be selected according to the requirements of SJ/T 11332-2006
6 digital video interface optional to be determined
7 digital audio interface optional to be determined
5 Technical requirements
5.1 Overview
The block diagram of the terrestrial digital TV receiver is shown in Figure 1.
The terrestrial digital television receiver completes the conversion from the radio frequency signal input to the terminal audio signal output and the video signal display. Input RF
The signal is demodulated and channel decoded, and the output transport stream is sent to the demultiplexing module for demultiplexing, and the service information/program specific letter is simultaneously output.
Information (SI/PSI), electronic program guide (EPG) and other information, and the output basic stream is sent to the audio and video decoding module, and the decoded audio is sent to the speaker.
Output, the video signal is formatted and sent to the display.
figure 1
5.2 RF Demodulation and Channel Decoding Requirements
5.2.1 Overview
The performance and functional requirements specified in this clause refer to the requirements in the case of acceptable error (AEF). See the regulations on AEF
Appendix A.
5.2.2 Frequency
5.2.2.1 Frequency range
The receiver shall be capable of receiving RF signals on all channels in the local VHF and UHF bands, VHF and
See Table B for the frequency allocation table for the UHF band.
5.2.2.2 Signal bandwidth
Each channel has a bandwidth of 8MHz.
5.2.2.3 Frequency capture range
The receiver should be able to receive RF signals with a frequency offset of no more than ±150 kHz.
5.2.3 Working mode
The receiver shall support all operating modes specified in GB 20600-2006.
The performance parameters of this standard are specified according to the working mode in Table 2.
Table 2
Working mode carrier number
Forward error correction
Code rate
Symbol constellation
Mapping
Frame header mode
Frame head phase
Variety
Symbol interleaving
Option
Double pilot
insert
Net rate
Mbit/s
1 C=3780 0.4 16QAM PN945 Change 720 - 9.626
2 C=1 0.8 4QAM PN595 - 720 Do not insert 10.396
3 C=3780 0.6 16QAM PN945 Change 720 - 14.438
4 C=1 0.8 16QAM PN595 - 720 does not insert 20.791
5 C=3780 0.8 16QAM PN420 Change 720 - 21.658
6 C=3780 0.6 64QAM PN420 Change 720 - 24.365
7 C=1 0.8 32QAM PN595 - 720 does not insert 25.989
8 C=3780 0.8 16QAM PN945 Change 720 - 19.251
9 C=3780 0.6 64QAM PN945 Change 720 - 21.658
10 C=3780 0.8 64QAM PN420 Change 720 - 32.486
5.2.4 Program Search and Tuning
5.2.4.1 Basic requirements
The receiver should be able to support both automatic search and manual search for two program search methods. The receiver should be able to display the reception quality.
5.2.4.2 Automatic search
The receiver should have a full channel program automatic search function. After the search is completed, the receiver should save the searched program information as a program.
List and arrange in a certain order (eg frequency or other). After searching for a new channel, you can empty the original channel list and press the new search
Go to the program to develop a channel list.
The receiver should have a search progress indication during the search process.
5.2.4.3 Manual search
The receiver should have a manual search function that allows the user to search for the program by manually entering the channel number or frequency. If the festival is found
The item already exists in the program list and the user can be prompted to replace it.
5.2.4.4 Receive quality display
The receiver should be able to display the reception status including the selected program reception information. This information should include the center frequency and signal indications.
Wherein the signal indication can be based on signal strength or signal quality.
5.2.4.5 Modulation parameter change
If the transmitter only changes the modulation parameters (the transmission frequency and the transmission stream are unchanged), the receiver should be able to automatically detect the modulation mode change and
Automatically switch to the normal working mode within 5s for normal reception.
5.2.5 RF Port
5.2.5.1 RF input port
The receiver shall have at least one RF input that meets the technical requirements of the VHF/UHF band RF input interface in SJ/T 11327-2006.
In port. The port connector impedance is 75Ω and the reflection loss should be greater than or equal to 5dB.
5.2.5.2 RF Loop Output Port
As an option, the receiver can have a VHF/UHF band RF loop output interface technology in accordance with SJ/T 11327-2006.
Required RF loop output port. The port connector impedance is 75Ω.
The RF signal output of the RF loop should be between -1dB and 3dB. Signal loop output should be received with the receiver
Nothing.
5.2.6 Carrier-to-Noise Ratio (C/N) Threshold
The receiver C/N threshold requirements are shown in Table 3.
table 3
Working mode 1 2 3 4 5 6 7 8 9 10
Gaussian channel (C/N)/dB ≤8.0 ≤6.0 ≤10.7 ≤12.6 ≤13.2 ≤15.7 ≤15.8 ≤13.4 ≤15.9 ≤18.9
Rice channel (C/N)/dB ≤8.7 ≤6.5 ≤11.2 ≤13.3 ≤14.0 ≤16.6 ≤16.6 ≤14.3 ≤16.6 ≤19.8
Rayleigh channel (C/N)/dB ≤10.0 ≤8.4 ≤13.4 ≤16.6 ≤18.0 ≤18.8 ≤20.8 ≤18.3 ≤18.8 ≤24.5
See the C.1 for the Rayleigh channel model and C.2 for the Rice channel model.
5.2.7 Minimum received signal power
The minimum received signal power requirements of the receiver in the receivable frequency range are shown in Table 4.
Table 4
Working mode 1 2 3 4 5 6 7 8 9 10
Minimum received signal power /dBm ≤-90 ≤-91 ≤-87 ≤-85 ≤-84 ≤-82 ≤-82 ≤-84 ≤-82 ≤-79
5.2.8 Maximum received signal power
The receiver should work normally when receiving a radio frequency signal of not less than -10dBm.
5.2.9 Suppress analog TV adjacent channel interference capability
Specifies the power of the digital terrestrial television signal to be received and the analog television signal power from the adjacent channel in the case of acceptable error reception.
The ratio is C/I. See Table 5 for the receiver's ability to suppress adjacent-channel (N±1) analog TV signal interference.
table 5
Working mode 1 2 3 4 5 6 7 8 9 10
(C/I)/dB ≤-46 ≤-44 ≤-45 ≤-41 ≤-42 ≤-41 ≤-40 ≤-42 ≤-41 -
5.2.10 Suppress analog TV co-channel interference capability
Specifies the power of the digital terrestrial television signal to be received and the analog TV signal power from the same channel in the case of acceptable error reception.
The ratio is C/I. See Table 6 for the suppression capability of the receiver for interference with the same frequency analog TV signal.
Table 6
Working mode 1 2 3 4 5 6 7 8 9 10
(C/I)/dB ≤-14 ≤-14 ≤-10 ≤-5 ≤-3 ≤-4 ≤0 ≤-3 ≤-4 -
5.2.11 Suppressing the ability of digital TV adjacent frequency interference
Specifies to receive terrestrial digital television signal power and terrestrial digital television signals from adjacent channels in the case of acceptable error reception
The power ratio is C/I. See Table 7 for the receiver's ability to suppress adjacent-channel (N±1) digital television signals.
Table 7
Working mode 1 2 3 4 5 6 7 8 9 10
(C/I)/dB ≤-40 ≤-41 ≤-38 ≤-36 ≤-36 ≤-35 ≤-34 ≤-36 ≤-35 -
5.2.12 Suppressing the ability of digital TV to co-channel interference
It is stipulated that the ground digital TV signal power and the terrestrial digital TV signal from the same channel should be received under the condition of acceptable error reception.
The power ratio is C/I. The suppression capability of the receiver for interference with the same frequency digital television signal is shown in Table 8.
Table 8
Working mode 1 2 3 4 5 6 7 8 9 10
(C/I)/dB ≤8.5 ≤7.0 ≤11.0 ≤13.5 ≤13.5 ≤16...
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