bsen61108-4-20xxmaritimenavigationandradiocommunicationequipmentandsystems—global

bsen61108-4-20xxmaritimenavigationandradiocommunicationequipmentandsystems—global内容摘要：

................................................................................... 26 Analysing the RTCM data stream ................................................................................... 26 Caution .......................................................................................................................... 26 `,``,``,`,`,`,` Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELEC No reproduction or working permitted without license from IHS Not for Resale `,``,``,`,`,`,` Page 4 EN 61108−4:2020 Annex C (normative) Tests that are specific to integrated equipment that does not provide an output port for testing ............................................................................................... 29 General requirements ..................................................................................................... 29 Test of W ER display ....................................................................................................... 29 Comments to Clause 6, methods of testing ..................................................................... 29 Annex D (informative) Installation guidelines to counteract the effect of interference ........... 30 Introduction .................................................................................................................... 30 A ntennas ........................................................................................................................ 30 General installation requirements ................................................................................... 31 Noise/interference sources ............................................................................................. 33 Testing ........................................................................................................................... 33 Troubleshooting.............................................................................................................. 34 Annex E (informative) Implementation using a concurrent process ....................................... 35 Annex F (informative) Data interface guidance ..................................................................... 37 Annex ZA (normative) Normative references to international publications with their corresponding European publications .......................................................................................... ......... 38 B ibliography................................................................................................................. ......... 39 Figure – Generating atmospherics according to Feldman ................................................ 23 Figure – Test setup using a PC to program a waveform synthesizer .............................. 25 Figure – W ord error rate algorithm (first part) ................................................................. 27 Figure – W ord error rate algorithm (second part) ............................................................ 28 Figure – Station status update ........................................................................................ 35 Figure – Navigation process ........................................................................................... 36 Table 1 – Message types (M823/) .................................................................................. ..10 Table 2 – Protection ratios .................................................................................................. .. 11 Table – Parameters for different interference situations .................................................. 22 Table – Characteristic parameters of the simulated situations......................................... 25 Table – Troubleshooting conditions ................................................................................ 36 Copyright European Committee for Electrotechnical Standardization Provided by IHS under license with CENELEC No reproduction or working permitted without license from IHS Not for Resale Page 5 EN 61108−4:2020 MARITIME NAVIGATION AND RADIOCOMMUNICATION EQUIPMENT AND SYSTEMS – GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) – Part 4: Shipborne DGPS and DGLONASS maritime radio beacon receiver equipment – Performance requirements, methods of testing and required test results 1 Scope This part of IEC 61108 specifies the minimum operational and performance requirements, methods of testing and required test results conforming to performance standards not inferior to those adopted by the IMO in resolution (73). In addition, it takes account of IMO resolution (17) and is associated with IEC 60945. W hen a requirement of this standard is different from IEC 60945, the requirement in this standard shall take precedence. This standard may be satisfied by equipment integral with GNSS equipment. This standard is applicable to HSC. All text of this standard, whose wording is identical to that in IMO resolution (73) and ITUR is printed in italics and the resolution (abbreviated to – 114 and respectively ) and paragraph numbers are indicated in brackets . (114/ or ). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60945, Maritime navigation and radiomunication equipment and systems – General requirements – Methods of testing and required test results IEC 611621, Maritime navigation and radiomunication equipment and s。