Path:
Home >
GB/T >
Page27 > GB/T 37656-2019
Home >
Standard_List >
GB/T >
Page27 > GB/T 37656-2019
US$1104.00 ยท In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email.
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 | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 37656-2019 | English | 1104 |
Add to Cart
|
5 days [Need to translate]
|
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 |
GB/T 37656-2019
|
Standard similar to GB/T 37656-2019
GB/T 37661 GB/T 18913 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 | 58,587 |
| 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)