GB/T 37656-2019 English PDF

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GB/T 37656-2019: Maritime navigation and radiocommunication equipment and systems - VHF radiotelephone equipment incorporating Class D Digital Selective Calling (DSC) - Methods of testing and required test results
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 37656-2019	1104	Add to Cart	5 days	Maritime navigation and radiocommunication equipment and systems - VHF radiotelephone equipment incorporating Class D Digital Selective Calling (DSC) - Methods of testing and required test results	Valid

Similar standards

GB/T 18913   GB/T 37661   

Basic data

Standard ID: GB/T 37656-2019 (GB/T37656-2019)
Description (Translated English): Maritime navigation and radiocommunication equipment and systems - VHF radiotelephone equipment incorporating Class D Digital Selective Calling (DSC) - Methods of testing and required test results
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: U66
Classification of International Standard: 47.020.70
Word Count Estimation: 58,519
Date of Issue: 2019-06-04
Date of Implementation: 2020-01-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37656-2019: Maritime navigation and radiocommunication equipment and systems - VHF radiotelephone equipment incorporating Class D Digital Selective Calling (DSC) - Methods of testing and required test results

---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.
Maritime navigation and radiocommunication equipment and systems--VHF radiotelephone equipment feeding Class "D" Digital Selective Calling (DSC)--Methods of testing and required test results ICS 47.020.70 U66 National Standards of People's Republic of China Maritime navigation and radio communication equipment and systems Class D Digital Selective Call (DSC) VHF radiotelephone Test method and required test results VHFradiotelephoneequipmentincorporatingClass "D" DigitalSelective (IEC 62238.2003, IDT) 2019-06-04 released 2020-01-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and definitions, abbreviations 2 3.1 Terms and Definitions 2 3.2 Abbreviations 2 4 General and operational requirements 3 4.1 General 3 4.2 Composition 3 4.3 Structure 3 4.4 Control unit and indicator 4 4.5 DSC call encoding and decoding device 4 4.6 DSC display 5 4.7 Handle talker and speaker 6 4.8 Security measures 6 4.9 Mark 6 4.10 Preheating 6 5 Technical requirements 6 5.1 Conversion time 6 5.2 Transmission category and modulation characteristics 6 5.3 DSC transmitting and receiving functions 7 5.4 Ship Identification - MMSI and MMSI Group 7 5.5 Input of position information 7 5.6 Incoming call alarm 8 5.7 Multi-value function 8 5.8 Internal Detection 9 6 General conditions of measurement 9 6.1 Test signal settings used at the receiver input 9 6.2 Squelch 9 6.3 Conventional Modulation Test 9 6.4 Simulation antenna 9 6.5 Test signal setting used at the transmitter input 10 6.6 Test Channel 10 6.7 Generation and inspection of digital selective calling signals 10 6.8 DSC standard test signal 10 6.9 Determination of the bit error rate of the receiving part of the output 10 6.10 Measurement uncertainty and measurement results description 10 6.11 Test conditions, power supply and ambient temperature 11 6.12 Normal test conditions 11 6.13 Limit test conditions 12 6.14 Test procedure at extreme temperature 12 7 Environmental Test 12 7.1 Overview 12 7.2 Step 12 7.3 Performance Check 12 7.4 Vibration test 13 7.5 Temperature test 13 8 transmitter 13 8.1 Frequency error 13 8.2 Carrier Power 13 8.3 frequency offset 14 8.4 Modulator sensitivity, including microphone 15 8.5 Audio Response 15 8.6 Transmitted audio harmonic distortion 16 8.7 Adjacent channel power 17 8.8 Conducted spurious emissions transmitted to the antenna 17 8.9 Transient frequency change of the transmitter 17 8.10 Residual Modulation of the Transmitter 20 8.11 Frequency difference (DSC signal) 20 8.12 DSC Modulation Index 21 8.13 DSC Modulation Rate 21 8.14 Generating Call Sequence Test 21 9 radiotelephone receiver 22 9.1 Harmonic Distortion and Rated Audio Output Power 22 9.2 Audio Response 22 9.3 Maximum available sensitivity 23 9.4 Same channel suppression 24 9.5 Adjacent channel selection rate 24 9.6 spurious response suppression 25 9.7 Intermodulation response 25 9.8 Blocking or desensitization 25 9.9 spurious emissions 26 9.10 Receiver residual noise level 26 9.11 Squelch operation 27 9.12 suppression lag 27 9.13 Multi-attribute feature 28 10 DSC decoder receiver 28 10.1 Maximum Available Sensitivity 28 10.2 Same channel suppression 29 10.3 Adjacent channel selection rate 29 10.4 Spurious response and anti-blocking 29 10.5 Intermodulation response 30 10.6 Dynamic Range 30 10.7 Spurious emission 31 10.8 Correct Decoding Verification of Different Types of DSC Calls 31 10.9 VTS and AIS Channel Management DSC Transmission Response 31 10.10 Synchronous Reception 32 11 Electromagnetic Compatibility 32 11.1 Conducted spurious emissions 32 11.2 Radiated spurious emissions 32 11.3 Electromagnetic environment immunity 32 Appendix A (Normative) DSC Call 33 Appendix B (Normative) Receiver Power Measurement Specification 34 Appendix C (informative) The main differences between this standard and existing regional standards 36 Appendix D (informative) Recommended standards for equipment operating in a strong electromagnetic environment 37 Appendix E (informative) Appendix to the ITU Radio Regulations Appendix S18.1998 39 Appendix F (informative) USVHF maritime radio channel and frequency 42 Appendix G (informative) Canadian maritime radio channel and frequency 45 Appendix NA (informative) China Radio Frequency Band Division 50

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard uses the translation method equivalent to IEC 62238.2003 "Marine navigation and radio communication equipment and systems D-level digital selection Sexual Call (DSC) Very High Frequency (VHF) Radiotelephone Test Method and Required Test Results. This standard has made the following editorial changes. --- The sequence of Figure 3 and Figure 4 quoted in the English standard is incorrect and has been adjusted; --- Added the informative Appendix NA "China Radio Frequency Band Division". This standard is proposed and managed by the National Marine Electrical and Electronic Equipment Standardization Technical Committee (SAC/TC531). This standard was drafted. China Shipbuilding Industry Comprehensive Technology and Economic Research Institute, Guangzhou Zhonghai Telecom Co., Ltd., Dalian Haida Ship Navigation National Engineering Research Center Co., Ltd. The main drafters of this standard. Wang Huizhen, Li Xinzhou, Yan Wenqi, Zhao Chenning, Sun Meng, Li Di, Cao Hanen, Fu Zhen, Chen Zhongming. Maritime navigation and radio communication equipment and systems Class D Digital Selective Call (DSC) VHF radiotelephone Test method and required test results

1 Scope

This standard specifies general communication for shipboard fixed equipment using Class D digital selective calling (DSC) Very High Frequency (VHF) radiotelephones. Basic requirements. These requirements contain and incorporate the relevant provisions of the ITU Radio Regulations and Recommendation ITU-RM.493-10 defining Class D equipment. Relevant guidelines detailed in resolutions IMOMSC/Circ.803, MSC/Circ.862 and MSC.131(75). This standard also specifies the technical characteristics, test methods and test results of the equipment and system. Appendix D describes the recommended standards for working equipment in a strong electromagnetic environment.

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. IEC 60945 maritime navigation and radiocommunication equipment and systems generally require test methods and test results (Maritimenavigationandradiocommunicationequipmentandsystems-Generalrequirements-Meth- Odsoftestingandrequiredtestrusults) Maritime navigation and radiocommunication equipment and systems - Digital interface - Part 1. Single and multi-speakers (Maritimenavigationandradiocommunicationequipmentandsystems-Digitalinterfaces-Part 1. Singletalkerandmultiplelisteners) IMOMSC.131(75).2002 SOLAS ships on the sea maintain continuous monitoring on VHF channel 16 and in non-SOLAS Installation of VHF digital selective calling equipment on board (MaintenanceofacontinuouslisteningwatchonVHFchannel 16bySOLASshipswhilstatseaandinstalationofVHFDSCfacilitiesonnon-SOLASships) IMOMSC/Circ.803 Non-SOLAS ships participate in the Global Maritime Distress and Safety System [Participationofnon-SOLAS shipsintheGlobalMaritimeDistressandSafetySystem(GMDSS)] IMOMSC/Circ.862 Some requirements for GMDSS equipment performance standards (Clarificationsofcertainrequirementsin IMOperformancestandardsforGMDSSequipment) ITU Radio Regulations Appendix S18.1998, Transmission Frequency Table for the 156 MHz to 174 MHz Band of the Maritime Mobile Service Station (Tableoftransmittingfrequenciesintheband156-174MHzforstationsinthemaritimemobile Service) Recommendation ITU-R.493-10 Digital selective calling system for use in the maritime mobile service (Digitalselective-calingsys- Temforuseinthemaritimemobileservice) Optional extension of the ITU-RM.821-1.1997 Recommendation for digital selective calling systems for the maritime mobile service (Optional Expansionofthedigitalselective-calingsystemforuseinthemaritimemobileservice) ......

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