1、BSI Standards Publication BS ISO 9876:2015 Ships and marine technology Marine facsimile receivers for meteorological chartsBS ISO 9876:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 9876:2015. It supersedes BS EN ISO 9876:1999 which is withdrawn. The UK
2、 participation in its preparation was entrusted to Technical Committee EPL/80, Maritime navigation and radiocommunication equipment and systems. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the nec
3、essary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 85850 5 ICS 33.050.30; 47.020.70 Compliance with a British Standard cannot confer immunity from legal obligations. This B
4、ritish Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2015. Amendments/corrigenda issued since publication Date T e x t a f f e c t e dBS ISO 9876:2015 ISO 2015 Ships and marine technology Marine facsimile receivers for meteorological charts Nav
5、ires et technologie maritime Rcepteurs marins de transmissions par tlcopie des cartes mtorologiques INTERNATIONAL STANDARD ISO 9876 Third edition 2015-03-15 Reference number ISO 9876:2015(E)BS ISO 9876:2015ISO 9876:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015 All righ
6、ts reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from ei
7、ther ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO 9876:2015ISO 9876:2015(E) ISO 2015 All rights
8、reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Requirements 3 4.1 Construction 3 4.2 Performance standards for recording unit . 3 4.3 Performance standards for radio receiver 4 4.4 General requirement of the radio receiver and the recording
9、 unit . 4 5 Test methods and required test results 5 5.1 General test requirements 5 5.2 General conditions of measurement 5 5.3 Construction 5 5.4 Performance tests for recording unit 5 5.5 Performance tests for radio receiver . 6 5.6 Other tests . 7 6 Marking 8 7 Information 8 Bibliography 9BS ISO
10、 9876:2015ISO 9876:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested
11、 in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Comm
12、ission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents
13、should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible fo
14、r identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the
15、convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Fo
16、reword Supplementary information. The committee responsible for this document is ISO/TC 8, Ships and marine technology, Subcommittee SC 6, Navigation and ship operations. This third edition cancels and replaces the second edition (ISO 9876:1997), which has been technically revised.iv ISO 2015 All ri
17、ghts reservedBS ISO 9876:2015INTERNATIONAL ST ANDARD ISO 9876:2015(E) Ships and marine technology Marine facsimile receivers for meteorological charts 1 Scope This International Standard specifies the construction, performance, type testing, and inspection for a ship borne marine facsimile receiver
18、that receives meteorological charts transmitted by “Facsimile transmission of meteorological chart over radio circuits” stated in accordance with World Meteorological Organization (WMO) publication No. 386, Part III-5. This International Standard applies to ship borne radio facsimile receivers for t
19、he reception of meteorological charts and other graphical representation of meteorological conditions intended as an aid to navigation at sea. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. F
20、or 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 radiocommunication equipment and systems General requirements Methods of testing and required test results
21、 3 T erms a nd definiti ons For the purposes of this document, the following terms and definitions apply. 3.1 dead sector part of scanning line unavailable for picture signal transmissions the criteria of which are within 4,5 % 0,5 % of the length 3.2 facsimile process, or the result of the process,
22、 by which fixed graphic charts are scanned and the information is converted to electric signals which are used remotely to produce a copy of the chart in record form 3.3 F3C radio emissions designation from ITU Radio Regulations Appendix 1 for frequency modulation, single channel having analog infor
23、mation, facsimile ISO 2015 All rights reserved 1BS ISO 9876:2015ISO 9876:2015(E) 3.4 index of cooperation IOC value of the index of cooperation, M, is defined as follows: / whereL is the length of the scanning line, in centimetres;F is the density of the scanning line, in reciprocal centimetres. 3.5
24、 IOC selection signal signal for automatic IOC selection in the facsimile receiver which is accomplished by transmission of alternating black and white signals lasting for 5 s to 10 s with the following frequencies: 300 Hz for IOC 576; 675 Hz for IOC 288 (or IOC 576 with alternate line scanning). No
25、te 1 to entry: The envelopes of the signal are approximately rectangular. 3.6 meteorological chart chart portraying the state of the weather (such as weather conditions, wind force and direction, high or low atmospheric pressure, weather front and isobar) at a particular time over a wide area 3.7 ph
26、asing adjusting the phase of the independent synchronous power source so as to be able to receive the weather chart in its correct position 3.8 phasing signal signal for automatically phasing the facsimile receiver accomplished by a 30 s transmission of alternating black and white signals with the f
27、ollowing frequencies: 1 Hz for 60 lines per minute (60 r/min); 1,5 Hz for 90 lines per minute (90 r/min); 2 Hz for 120 lines per minutes (120 r/min). Note 1 to entry: This signal may also be used for automatic starting, automatic selection of scanning frequency, and automatic adjustment of recording
28、 levels. Note 2 to entry: The wave form of this signal is either symmetrical, i.e. black and white, each lasting half the scanning line, or symmetrical with the white lasting for 5 % and black for 95 % of the scanning line. 3.9 remote control signal control signal for operating the apparatus from a
29、distance Note 1 to entry: The remote control signals for operating the facsimile receiver for meteorological charts include the phasing signal, the IOC selection signal, and stop signal. 3.10 SND/N value of signal plus noise plus distortion to noise ratio2 ISO 2015 All rights reservedBS ISO 9876:201
30、5ISO 9876:2015(E) 3.11 SND/ND value of signal plus noise plus distortion to noise plus distortion ratio 3.12 spurious responses ratio of the input level of an unwanted signal at the frequency of the spurious response to the input level of a wanted signal when the wanted and unwanted signals individu
31、ally produce the same SND/N or SND/ND ratio at the receiver output 3.13 stop signal transmission of 5 s of alternating black and white signals at 450 Hz, followed by 10 s of signal corresponding to continuous black Note 1 to entry: The envelopes of the 450 Hz signals are approximately rectangular. 4
32、 Requirements 4.1 Construction 4.1.1 The equipment shall comprise of a radio receiver and a recording unit. 4.1.2 The recording unit shall be constructed as to allow for the change of recording paper and either or both recording stylus during day and subdued artificial light. It should be possible t
33、o affect routine maintenance under the same conditions. 4.2 Performance standards for recording unit 4.2.1 Recording unit The equipment shall be capable of continuous recording while transmissions are being received. 4.2.2 Input signals The recording unit shall accept input signals from an external
34、receiver in the audio frequency range at an input level of at least 10 dBm to +10 dBm and shifts of 150 Hz and/or 400 Hz about a centre frequency of 1 900 Hz at an impedance of 600 . 4.2.3 Index of cooperation (IOC) Automatic or manual operation at an index of cooperation of 576 and 288 shall be pos
35、sible. 4.2.4 Scanning speeds The recording unit shall be capable of the automatic and manual selection of scanning speeds of 60, 90 and 120 scans per minute. 4.2.5 Automatic operation The recording unit shall automatically respond to control signals of 300 Hz and 675 Hz modulation of the carrier wav
36、e for start and index of cooperation selection shall be by detection of line synchronization and to 450 Hz modulation stop signal. ISO 2015 All rights reserved 3BS ISO 9876:2015ISO 9876:2015(E) 4.2.6 Synchronization of scanning and phasing The recording unit shall be capable of synchronization of it
37、s operation with the facsimile transmitter by: frequency accuracy of min; frequency stability of min. Phasing shall be automatic with a facility for manual adjustment. 4.2.7 Pitch of scanning trace The pitch of scanning traces shall be maintained within 25 % of its nominal value. 4.2.8 Recording siz
38、e and marking The minimum width of the recording shall be 180 mm. The recording material shall be marked in such a way as to indicate that the material remaining is not less than 1 m. 4.3 Performance standards for radio receiver 4.3.1 Receiving frequency The radio receiver shall have a range within
39、110 kHz to 27 MHz of at least 3 MHz to 24 MHz with the capability of receiving F3C transmissions. It should have up to six pre-set spot frequencies. Every selected frequency shall be displayed or easily identified by an appropriate method. 4.3.2 Frequency stability The frequency drift shall not exce
40、ed 50 Hz over the temperature range +15C to +35 C. 4.3.3 Sensitivity Input to the receiver shall be 3 V or less for 3 MHz and above, and 10 V or less for 110 kHz up to 3 MHz so that the recorder produces a readable picture. 4.3.4 Selectivity Frequency bandwidth shall be within 6,2 kHz measured at th
41、e 6 dB attenuation points, and within 10 kHz at the 66 dB attenuation points. 4.3.5 Intermediate frequency rejection Rejection of signals at the intermediate frequencies shall be greater than 60 dB. 4.3.6 Image frequency rejection The receiver shall have an image frequency rejection of not less than
42、 40 dB. 4.4 General requirement of the radio receiver and the recording unit The radio receiver and the recording unit shall be in accordance with IEC 60945, for bridge-mounted equipment protected from the weather.4 ISO 2015 All rights reservedBS ISO 9876:2015ISO 9876:2015(E) 5 Test methods and requ
43、ired test results 5.1 General test requirements Except where otherwise stated, electric power shall be supplied to the equipment only during the periods specified for electrical tests and performance tests. Except where otherwise stated, the supply voltage applied to the equipment during the tests s
44、hall be the nominal voltage and alternating current supplies shall be at nominal frequency. Any requirements in Clause 4 for which no test is specified in Clause 5 shall be checked by inspection of the equipment, its manufacturing drawings, or other relevant documents. 5.2 General conditions of meas
45、urement 5.2.1 Recording unit Recording unit testing shall be undertaken using a facsimile transmitter linked to the recorder under test. If the transmitter is of AM output, it shall be linked through an AM/FM converter. The transmitter shall be capable of operating in accordance with the requirement
46、s given in 4.2.2 to 4.2.5. The type testing authority has the option of evaluating overall performance of the equipment by receiving an actual facsimile transmission 5.2.2 Radio receiver The radio receiver shall be tested by reception of signals of F3C class of emission from a signal generator while
47、 linked to the recording unit. 5.3 Construction The requirements given in 4.1 shall be checked by visual inspection. 5.4 Performance tests for recording unit 5.4.1 Test method Select, in turn, the following combinations of IOC and scanning speed in scans per minute:288/60, 288/90, 288/120, 576/60, 5
48、76/90, and 576/120. For each test, switch on the transmitter. These tests cover the requirements given in 4.2.1 to 4.2.5. 5.4.2 Results required The recorder shall, in each test, select the appropriate IOC and scanning speed and shall produce a chart facsimile identical to that transmitted. 5.4.3 Sy
49、nchronization of scanning and phasing By visual inspection, check that each test chart received is complete and square with the edge of the recording material. During reception of a test chart, correct operation of the manual phase adjustment shall be checked. ISO 2015 All rights reserved 5BS ISO 9876:2015ISO 9876:2015(E) 5.4.4 Pitch of scanning trace By visual inspection of the test charts, it shall be checked that each line is of even density and is parallel to the line precedin
