1、STANDARD ETS 300 255 May 1994 Source: ETSI TC-SES Reference: DE/SES-05002 UDC: 621.396.61 Key words: LMES, LBRDC Satellite Earth Stations and Systems (SES); Land Mobile Earth Stations (LMESs) operating in the I 1 II 2/14 GHz bands providing Low Bit Rate Data Communications (LBRDCs) ETSI European Tel
2、ecommunications Standards Institute ETSI Secretariat Postal address: 06921 Sophia Antipolis Cedex - FRANCE Office address: Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE Tel.: + 33 92 94 42 O0 - Fax: + 33 93 65 47 16 European Telecommunications Standards institute 1 994. All rights reserv
3、ed. No part may be reproduced except as authorised by written permission. The copyright and the foregoing restriction on reproduction extend to all media in which the information may be embodied. ETSI ETS*:300 255 94 3400855 0029514 90T ETSI ETS*300 255 94 3400855 0029535 84b H Page 2 ETS 300 255:19
4、94 . Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to “ETSI Editing and Standards Approval Dept.“ at the address shown on the title page. Page
5、3 ETS 300 255: 1994 Contents Foreword . 5 1 Scope . 7 2 Normative references 8 3 Definitions and abbreviations 8 3.1 Definitions . 8 3.2 Abbreviations 9 4 Reauirements . 9 4.1 4.2 4.3 4.4 Safety 9 4.1.1 Mechanical construction . 9 4.1.2 Electrical safety, power voltages . 9 4.1.3 Radio frequency rad
6、iation protection 9 Radio Frequency (RF) 10 In this subclause, whenever a change of limit between adjacent frequency bands occurs, the lower of the two limits shall apply at the transition frequency . 10 4.2.1 Unwanted emissions outside the band 14. O0 - 14. 25 GHz 10 4.2.2 Maximum unwanted emission
7、 within the 14, O0 GHz to 14, 25 GHz band 12 4.2.3 Off-axis EIRP emissions density in the nominated bandwidth . 12 4.2.4 Electromagnetic immunity . 14 LMES Control and Monitoring Functions (CMF) . 14 4.3.1 Monitoring functions 15 4.3.1.1 Processor monitoring 15 4.3.1.2 Transmit frequency sub-system
8、15 4.3.2 Power onheset . 16 4.3.3 Network control reception and authorisation . 16 4.3.3.1 Network control authorisation 16 4.3.3.2 Network control reception . 16 Initial burst rate transmission . 17 5 Recommendations . 17 Electrical safety while loading and unloading hazardous fuels or gases . 17 E
9、lectromagnetic immunity . General immunity between 2 GHz and 3 GHz 18 Compliance with RF specifications under conditions of shock and vibration 18 Method of attachment to the vehicle of the Externally Mounted Equipment (EME) . 18 5.1 5.2 5.3 5.4 6 Network Control Facilities (NCF) for LMES networks 1
10、9 Annex A (normative): Environmental and test conditions 20 A.l Environmental conditions . 20 A.2 Test conditions., . 20 Annex B (normative): Out-of-band unwanted emissions above 960 MHz . test procedure . 21 B . 1 Introduction . 21 8.2 Measuring apparatus . 21 ETSI ETSx300 255 94 3400855 0029537 bL
11、9 = Page 4 ETS 300 255: 1994 8.3 Equipment Under Test (EUT) . 21 B.4 Special Test Equipment (STE) 21 B.5 Test Set-up . 22 8.6 Measuring procedure 22 B.7 Alternative measuring procedure 22 Annex C (normative): In-band unwanted emissions. test procedure 24 C.l Introduction 24 C.2 Measuring apparatus 2
12、4 C.3 Equipment Under Test (EUT) . 24 C.4 Special Test Equipment (STE) 24 C.5 Test set-up . 24 C.6 Measuring procedure 25 C.7 Alternative measuring procedure 25 Annex D (normative): Off-axis EIRP density. test procedure 26 D . 1 Introduction 26 D.2 Measuring apparatus 26 D.3 Equipment Under Test (EU
13、T) . 26 0.4 Special Test Equipment (STE) 26 D.5 Test set-up . 26 D.6 Measuring procedure 26 Annex E (normative): Static rms antenna pointing accuracy 27 E . 1 introduction 27 E.2 Measuring apparatus 27 E.3 Equipment Under Test (EUT) . 27 E.4 Special Test Equipment (STE) 27 E.5 Test set-up . 27 E.6 M
14、easuring procedures 27 History . 29 ETSI ETS*300 255 7Y E 3Lt00855 0029518 555 E Page 5 ETS 300 255:1994 Foreword This European Telecommunication Standard (ETS) has been produced by the Satellite Earth Stations and Systems (CECI Technical Committee of the European Telecommunications Standards Instit
15、ute (ETSI). Every ETC prepared by ETSI is a voluntary standard. This ETS contains text concerning type approval of the equipment to which it relates. This text does not make this ETS mandatory in its status as a standard. However, this ETS can be referenced, wholly or in part, for mandatory applicat
16、ion by decisions of regulatory bodies. Page 6 ETS 300 255:1994 Blank page ETSI ETSJ300 255 94 = 3400855 0029520 103 LM ES; receive Page 7 ETS 300 255: 1994 10,70 - 11,70 GHz 12,50 - 12,75 GHz 1 Scope This European Telecommunication Standard (ETSI provides specifications for the standardisation of th
17、e characteristics of Land Mobile Earth Stations (LMESs) with both transmit and receive capabilities in order to ensure general safety and to limit interference to radio communications services. The LMESs operate as a part of a geostationary satellite network providing Low Bit Rate Data Communication
18、s (LBRDC) for land mobile applications. These LMESs generally have the following characteristics: - the LMESs could be either vehicle mounted or portable equipment; - the LMESs could consist of a number of modules including a keyboard interface to the user; - the LMESs operate in a 3O satellite spac
19、ing environment with linear polarisation; - the antenna of the LMES may be omnidirectional or directional with a means of tracking the satellite. Because the transmissions from the LMES to the satellite in the 14,OO - 14,25 GHz band fall under a secondary allocation, the transmissions should not cau
20、se harmful interference to primary services (e.g. Fixed Satellite Service (FSSI) and at the same time cannot claim protection from harmful interferences from those services. The main specifications are contained in three categories related to: - safety: to protect personnel, public and goods from un
21、safe operating conditions or equipment; unwanted emissions: to protect terrestrial and satellite radio services from harmful interference; - LMES control and monitoring: to specify a minimum set of Control and Monitoring Functions (CMF) that shall be implemented on each LMES in order to minimise the
22、 probability that they originate unwanted transmissions that may give rise to harmful interference to other systems. This ETS deals with two types of specification: al Essential normative requirements (indicated in Clause 41 Requirements are specified in order to protect other users of the frequency
23、 spectrum from unacceptable interference. In addition, requirements are specified for the purposes of general safety. b) Recommendations (indicated in Clause 5) Recommendations are specified relating to matters of general safety, minimisation of interference to other users of the radio spectrum and
24、for the provision of protection of the LMES against electromagnetic interference from other systems. All tests related to the requirements shall be performed and the results entered in the data sheets of the test report. The ability to comply with the recommendations shall also be noted in the data
25、sheets of the test report. All parameters and operational conditions declared by the manufacturer shall be entered in the test report. ETSI ETSr300 255 74 9 3400855 0029521 04T Page 8 ETS 300 255: 1994 2 Normative references This ETS incorporates, by dated or undated references, provisions from othe
26、r publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this ETS only when incorporated in it by amendment or revision. For
27、 undated references the latest edition of the publication referred to applies. I 1 IEC 21 5 (1 987): “Safety requirements for radio transmitting equipment“ 21 i31 i41 i51 i61 CISPR Publication No. 22 (1985): “Limits and methods of measurement of radio interference characteristics of information tech
28、nology equipment“. IEC 51 0-2-1 (1 978): “Methods of measurement for radio equipment used in satellite earth stations, Part 2: Measurement for sub-systems“ . ETS 300 282: “Satellite Earth Stations and Systems (SES); Network Control Facilities (NCFs) for Land Mobile Earth Stations (LMESs) operating i
29、n the 1,5/1,6 GHz and 11/12/14 GHz bands providing Low Bit Rate Data Communications (LBRDCsJ“. IEC 801 -3 (1 984): “Electromagnetic compatibility for industrial-process measurement and control equipment, Part 3: Radiated electromagnetic field requirements“. CISPR Publication No. 16 (1 987): “CISPR s
30、pecification for radio interference measuring apparatus and measurement methods“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of this ETC, the following definitions apply: Installable Equipment (IE), Internally Mounted Equipment (IME) and Externally Mounted Equipment (EME): an I
31、nstallable Equipment (IE) is an equipment which is intended to be installed in a vehicle. An IE may consist of one or several interconnected modules. The manufacturer should indicate which modules are intended to be Externally Mounted Equipment (EME); the remaining module(s) will then be defined as
32、Internally Mounted Equipment (IME). Where different specifications apply to IME and EME, this is noted in the text of this ETS. Portable Equipment (PE): a Portable Equipment (PE) is generally intended to be self-contained, free standing and portable. PE would normally consist of a single module, but
33、 may consist of several interconnected modules. In some cases different specifications will apply to PE and this is noted in the text of this ETS. Nominated bandwidth: the bandwidth of the LMES radio frequency transmission is nominated by the manufacturer. The nominated bandwidth should encompass al
34、l close-in spectral elements of the transmission which have a level greater than the specified spurious levels. The nominated bandwidth should be wide enough to take account of the transmit carrier frequency stability. The nominated bandwidth should be within the Ka transmit frequency band within wh
35、ich the LMES operates. The value of the nominated bandwidth should be entered on the data sheet of the test report. Unwanted emissions: unwanted emissions are those falling outside the nominated bandwidth. Directional antenna: a directional antenna is defined as one with a transmit gain of 10 dBi or
36、 greater. ETSI ETS*300 255 94 = 3400855 0027522 TBb Page 9 ETS 300 255:1994 3.2 Abbreviations For the purposes of this ETS, the following abbreviations apply: CMF EIRP EM EME EUT IE IME LBRDC LMSS LMES NCF PE RF rms STE Control and Monitoring Function Equivalent Isotropically Radiated Power Electro-
37、Magnetic Externally Mounted Equipment Equipment Under Test Installable Equipment Internally Mounted Equipment Low Bit Rate Data Communication Land Mobile Satellite Service Land Mobile Earth Station Network Control Facility Portable Equipment Radio Frequency root mean square Special Test Equipment 4
38、Requirements 4.1 Safety 4.1 .I Mechanical construction Purpose: Protection of operating personnel, the public and goods from insecure or unsafe structures. Specification: For Installable Equipment IIE) and Portable Equipment (PE) the mechanical design, construction and finish of the equipment shall
39、conform to IEC 21 5 111, section 3, paragraph 9.1. Verification: Verification shall be demonstrated by documentary evidence and visual inspection. 4.1.2 Electrical safety, power voltages Purpose: Protection of operating personnel and the public from electric shock. Specification: The electrical safe
40、ty of the equipment shall be in accordance with paragraphs 13, 14, 15 and 16 and Appendix B of IEC 215 ll. Verification: Conformance shall be determined by documentary evidence and visual inspection. 4.1.3 Radio frequency radiation protection Purpose: To indicate the distance from the LMES below whi
41、ch RF power densities in excess of 10 W/m2, when averaged over a 6 minute period, may be experienced. ETSI ETSx300 255 94 3400855 0029523 912 Page 10 ETS 300 255: 1994 Specification: The radiating part of the equipment (which includes the exterior of any radome or other antenna enclosure where fitte
42、d) shall be labelled with a warning notice which shall be clearly visible when the equipment is in its normal operating configuration. This notice shall indicate the closest distance to the radiating part within which a person may approach the equipment without experiencing radio frequency power den
43、sity levels in excess of 10 W/m2, when under worst case conditions 1e.g. maximum power, maximum on/off ratio) averaged over a 6 minute period. This notice shall also state that before approaching the radiating part within any distance closer than that indicated, the LMES equipment shall be switched
44、off or otherwise disabled so that it shall not transmit. Where the equipment is vehicle mounted, a warning notice giving the same information as that affixed to the radiating part shall be provided for fixing in the vehicle near to and clearly visible from the normal operating position of the Intern
45、ally Mounted Equipment (IME). In addition, for vehicle mounted equipment where the radiating part is mounted in a position where it is not normally visible to a person standing on the ground next to the vehicle, further warning notices shall be provided with instructions that they be attached to the
46、 vehicle so as to be clearly visible to anyone attempting to climb on to the part of the vehicle where the radiating part of the equipment is mounted. In the case where the antenna is enclosed in a radome, or other antenna enclosure, and when no RF power density greater than 10 W/m2, when under wors
47、t case conditions (e.g. maximum power, maximum on/off ratio), averaged over a 6 minute period, is produced outside of this radome, or antenna enclosure, then it is not necessary to label the radiating part or provide labels for the vehicle in the manner indicated above. Instead, the radiating part s
48、hall be clearly labelled with a warning that the LMES equipment shall be switched off, or otherwise disabled, so that it shall not transmit before any work requiring the removal of the radome or antenna enclosure takes place. Where the equipment is vehicle mounted, a label containing the same warnin
49、g shall be provided, to be mounted in the vehicle near to, and clearly visible from, the normal operating position of the IME. Verification: Verification of the distance below which exist RF power densities in excess of 10 W/m2, when under worst case conditions ie.g. maximum power, maximum on/off ratio) averaged over a 6 minute period, shall be by documentary evidence. The manufacturer shall quantify the worst case conditions. Conformance with the labelling requirements of this subclause shall be demonstrated by visual inspection of the radiati
