1、BRITISH STANDARD BSEN 61110:1992 IEC1110:1992 System Omega and differential Omega receivers for ships Operational and performance requirements Methods of testing and required test results The European Standard EN61110:1992 has the status of a BritishStandardBSEN61110:1992 This BritishStandard, havin
2、g been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe authority of the Standards Board and comesintoeffect on 15December1992 BSI 04-2000 The following BSI references relate to the work on this standard: Committee referenceEEL/30 Draft for c
3、omment90/32849DC ISBN 0 580 21483 4 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Italy Belgium Luxembourg Denmark Net
4、herlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland UnitedKingdom Amendments issued since publication Amd. No. Date CommentsBSEN61110:1992 BSI 04-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN61
5、110 3 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross references Inside back coverBSEN61110:1992 ii BSI 04-2000 National foreword This BritishStandard has been prepared under the direction of the Electronic Equipment Standards Policy Com
6、mittee and is the English language version of EN61110:1992 System Omega and differential Omega receivers for ships Operational and performance requirements Methods of testing and required test results, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identica
7、l with IEC1110:1992 published by the International Electrotechnical Commission (IEC). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of it
8、self confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to12, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated
9、. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61110 September1992 UDC 621.396.962:656.61.052:620.1:621.317 Descriptors: Ship, navigational instruments, Omega and differential Omega receiver, performance requirements, op
10、erational requirements, methods of testing, required test results English version System Omega and differential Omega receivers for ships Operational and performance requirements Methods of testing and required test results (IEC1110:1992) Rcepteurs des systmes Omga et Omga diffrentiel pour navires E
11、xigences oprationelles et de fonctionement Mthodes dessai et rsultats exigibles (CEI1110:1992) Omega und Differential-Omega-Empfnger- System fr Schiffe Betriebstechnische und Leistungsanforderungen Prfverfahren und geforderte Prfergebnisse (IEC1110:1992) This European Standard was approved by CENELE
12、C on1992-03-24. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards
13、may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified
14、to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Uni
15、tedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1992 Copyright reserved to CENELEC members Ref. No. EN61110:1992EEN611
16、10:1992 BSI 04-2000 2 Foreword The text of document80(CO)23, as prepared by IECTechnical Committee N80: Navigational instruments, was submitted to the IEC CENELEC parallel vote in May1991. The reference document was approved by CENELEC as EN61110 on14March1992. The following dates were fixed: For pr
17、oducts which have complied with the relevant national standard before1993-08-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until1998-08-01. Annexes designated “normative” are part of the body of the standard. In this standard
18、, Annex ZA is normative. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Minimum performance standards 3 3.1 Object 3 3.2 Omega and differential Omega systems 3 3.3 Receiver types 3 3.4 General 4 3.5 Receiving conditions of the radio signals 4 3.6 Processing 5 3.7 Position information
19、display 5 3.8 Automatic reception systems 7 3.9 Warning 7 3.10 Ancillary equipment 8 4 Methods of testing and required test results 8 4.1 General 8 4.2 General requirements 8 4.3 Radiosignals receiving and processing tests 8 4.4 Position information display 10 4.5 Automatic reception systems 10 4.6
20、Warning 10 4.7 Ancillary equipment 10 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 11 latest date of publication ofan identical national standard (dop)1993-08-01 latest date of withdrawal ofconflicting nationa
21、l standards (dow)1993-08-01EN61110:1992 BSI 04-2000 3 1 Scope This International Standard specifies the minimum performance standards and methods of testing of shipborne receivers for the Omega system and the differential Omega system, associated with IEC945. 2 Normative references The following IEC
22、 normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this International S
23、tandard are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC945:1988, Marine navigational equipment. General requirements. Methods of tes
24、ting and required test results. IMOResolutionA.425(XI), Performance standards for differential Omega correction transmitting stations. IMOResolutionA.479(XII), Performance standards for shipborne receivers for use with differential Omega. The clause numbering of ResolutionA.479(XII) is indicated in
25、parentheses in the following clause3. Identical sentences or parts of sentences are in italics. 3 Minimum performance standards 3.1 Object (1.1) This International Standard defines the minimum characteristics of the Omega system and differential Omega system receivers intended for navigational purpo
26、se on ships with maximum speeds not exceeding35knots. 3.2 Omega and differential Omega systems The Omega system is a hyperbolic radionavigation system with worldwide coverage, comprising eight base stations, with c.w. transmission on10,20kHz,11,05kHz,11,33kHz and13,06kHz according to predetermined s
27、equences. The differential Omega system is based on the transmission by adapted stations of corrections indicating the differences between the phase values actually given by the Omega system and the theoretical values corresponding to the geographic coordinates of the station and to the theoretical
28、value of the propagation speed. Those correcting stations are transmitting phase modulated signals in the bands allocated by the ITU Radio Regulations to radiobeacons(190kHzto435kHz). 3.3 Receiver types This standard concerns all Omega and differential Omega receiver types manufactured for marine na
29、vigational use, among which can be identified: a) Omega receivers: 1) monofrequency receivers(10,2kHz only); 2) multifrequency receivers with ambiguity elimination: with manual or automatic processing; with display of lines of position (LOPs) and/or geographical coordinates (latitude-longitude). Ome
30、ga receivers can be provided with: an input allowing the manual introduction of corrections or current known position; an input allowing the introduction of corrections from the differential Omega system, manually or automatically; one or several outputs allowing the operation of associated plotters
31、 or integrated navigation systems. b) Differential Omega receivers, providing corrections for: 1) monofrequency receivers(10,2kHz); 2) multifrequency receivers: with manual or automatic processing; with display of lines of position (LOPs) and/or of geographical coordinates (latitude-longitude). Diff
32、erential Omega receivers can be provided with outputs allowing the automatic input of the corrections into an Omega receiver. c) Combined Omega/differential Omega receivers: 1) monofrequency receivers(10,2kHz); 2) multifrequency receivers: with manual or automatic processing; with display of lines o
33、f position (LOPs) and/or of geographical coordinates (latitude-longitude). Combined Omega/differential Omega receivers can be provided with: one or two inputs allowing the manual insertion of corrections or current known position;EN61110:1992 4 BSI 04-2000 one or several outputs allowing the operati
34、on of associated plotters or integrated navigation systems. 3.4 General 3.4.1 General requirements Omega and differential Omega receivers shall comply with the requirements of IEC945. Additions to that standard are given in3.4.2, 3.4.3 and3.4.4 below. 3.4.2 Power supply 3.4.2.1 The receiver shall be
35、 able to be supplied at least by one of the usual sources on board ships, for example: (2.6.1) Alternating current: 100-110-115-120-220-230 V ( 15 %), 50Hz or60Hz; Direct current: 12-24-32V( 15 %). The receivers shall comply with6.1.1 of IEC945, with respect to voltage and frequency tolerances. Thes
36、e tolerances shall apply to those sources declared by the manufacturer to be applicable to the receiver under test. 3.4.2.2 (2.6.2) The receiver shall be fitted with a built-in emergency supply capable of being automatically substituted with no break to the normal supply described in3.4.2.1 above. T
37、his emergency supply shall be capable of supplying the equipment during at least10min. 3.4.3 Starting-up The equipment shall be able to operate and to comply with this standard within30min after switching on. 3.4.4 Safety 3.4.4.1 Precautions shall be taken to ensure that no damage can result from an
38、 accidental short-circuit or grounding of the antenna input or any of the inputs or outputs for a duration of5min. 3.4.4.2 Precautions shall be taken to avoid as far as possible damage to receivers from transient overvoltages on the antenna or receiver inputs, e.g. those resulting from other equipme
39、nt or from lightning. 3.4.4.3 Precautions shall be taken to ensure that isolation exists between the power supply input and receiver ground and that inadvertent reversal of polarity of the power supply causes no damage to the equipment. 3.4.4.4 Precautions shall be taken to ensure that no damage can
40、 result when an unmodulated30V r.m.s. test signal is applied for15min to the antenna input terminal of the receiver at any of the Omega and/or differential Omega frequencies. 3.4.5 Antenna 3.4.5.1 (2.1.2) The antenna for the reception of Omega signals shall be capable of receiving these from any dir
41、ection in the horizontal plane at all times. 3.4.5.2 (3.1.4) The antenna for the reception of differential Omega corrections shall provide satisfactory reception of correction signals from any direction of the horizontal plane at all times. 3.4.5.3 (3.1.4) The antenna for the reception of differenti
42、al Omega corrections may be combined with the antenna described in3.4.5.1 and shall provide satisfactory reception of correction signals in the conditions described in 3.4.5.2. 3.4.5.4 When any active or passive antenna forms a part of Omega and/or differential Omega receiving system, the radiofrequ
43、ency (r.f.) input terminals of this device shall be taken as the r.f. input(s) of the receivers. 3.5 Receiving conditions of the radio signals 3.5.1 Omega system reception 3.5.1.1 Signals to be received Frequency of the signals: 10,2kHz and additionally11,05kHz,11,33kHz,13,06kHz, as applicable. Sign
44、al level: 54V/m to100mV/m(14dB/14V/m to100dB/14V/m). Differential signal level: 86dB. Signal-to-noise ratio: 25dB in a1kHz band centred on the specified Omega frequency at the receiver input. 3.5.1.2 Accuracy and stability of the frequency tuning The tuning error shall not exceed 0,01Hz on the vario
45、us considered frequencies. During any15min period after the start-up period defined in3.4.3, the tuning drift rate shall be reduced to less than 0,001Hz. 3.5.1.3 Interference protection The receiver shall be capable of operating properly in the presence of other signals transmitted on frequencies ne
46、ighbouring the specified Omega frequencies, which have a field strength not exceeding: a) 6dB below the field strength of the wanted signal at50Hz above and below the specified Omega frequency; b) 0dB to the field strength of the wanted signal at200Hz above and below the specified Omega frequency;EN
47、61110:1992 BSI 04-2000 5 c) 40dB above the field strength of the wanted signal, at500Hz above and below the specified Omega frequency. These requirements shall be complied with whatever the Omega signal field strength may be, between54V/m and100mV/m. 3.5.2 Differential Omega system reception 3.5.2.1
48、 Signals to be received Frequency range: 190kHz to435kHz. (3.1.1) Correction signals at least for the basic frequency of10,2kHz and additionally for one or more of the other Omega frequencies, as applicable. (3.1.3) Signal-to-noise ratio: correction receivers shall operate satisfactorily when the el
49、ectric field received from the transmitting station is10V/m or greater, day and night in the conditions for atmospheric noise as defined by the CCIR for the band285kHz to415kHz. 3.5.2.2 Reception modes (3.1.2) Receivers shall be able to receive corrections transmitted in accordance with the performance standards for differential Omega correction transmitting systems ResolutionA.425(XI) and shall indicate the Omega transmissions for which differential corrections are available. Correction signals may b
