SIST ETS 300 255 E1:2003

Satellite Earth Stations and Systems (SES); Land Mobile Earth Stations (LMESs) operating in the 11/12/14 GHz bands providing Low Bit Rate Data Communications (LBRDC)

Preparation of draft ETSs for mobile Earth Stations of Low Data Rate Systems operating in the Land Mobile Satellite Service (LMSS) and in the Radio Determination Satellite Service (RDSS). Ku-Band operation (i.e. Earth Stations transmitting in the 14 GHz frequency band)

Satelitske zemeljske postaje in sistemi (SES) – Kopenske mobilne zemeljske postaje (LMES), ki delujejo v pasovih 11/12/14 GHz, ki zagotavljajo podatkovne komunikacije z nizko bitno hitrostjo (LBRDC)

General Information

• Status: Published
• Publication Date: 30-Nov-2003
• Withdrawal Date: 30-Sep-2003
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Mandate: T-173
• Ref Project: ETSI ETS 300 255 ed.1 (1994-05) - Satellite Earth Stations and Systems (SES); Land Mobile Earth Stations (LMESs) operating in the 11/12/14 GHz bands providing Low Bit Rate Data Communications (LBRDC)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Satelitske zemeljske postaje in sistemi (SES) – Kopenske mobilne zemeljske postaje (LMES), ki delujejo v pasovih 11/12/14 GHz, ki zagotavljajo podatkovne komunikacije z nizko bitno hitrostjo (LBRDC)Satellite Earth Stations and Systems (SES); Land Mobile Earth Stations (LMESs) operating in the 11/12/14 GHz bands providing Low Bit Rate Data Communications (LBRDC)33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systemsICS:Ta slovenski standard je istoveten z:ETS 300 255 E3SIST ETS 300 255en01-VHSWHPEHU3SIST ETS 300 255SLOVENSKI
STANDARD



SIST ETS 300 255 E1:2003



EUROPEANETS 300 255TELECOMMUNICATIONMay 1994STANDARDSource: ETSI TC-SESReference: DE/SES-05002ICS:33.060.30Key words:LMES, LBRDCSatellite Earth Stations and Systems (SES);Land Mobile Earth Stations (LMESs)operating in the 11/12/14 GHz bandsproviding Low Bit Rate Data Communications (LBRDCs)ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail].: [phone] - Fax: [phone]Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1994. All rights reserved.SIST ETS 300 255 E1:2003



Page 2ETS 300 255: May 1994Whilst 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 Committee Support Dept." at the address shown on the title page.SIST ETS 300 255 E1:2003



Page 3ETS 300 255: May 1994ContentsForeword.51Scope.72Normative references.83Definitions and abbreviations.83.1Definitions.83.2Abbreviations.94Requirements.94.1Safety.94.1.1Mechanical construction.94.1.2Electrical safety, power voltages.94.1.3Radio frequency radiation protection.94.2Radio Frequency (RF).104.2.1Unwanted emissions outside the band 14,00 - 14,25 GHz.104.2.2Maximum unwanted emission within the 14,00 GHz to 14,25 GHz band.114.2.3Off-axis EIRP emissions density in the nominated bandwidth.124.2.4Electromagnetic immunity.144.3LMES Control and Monitoring Functions (CMF).144.3.1Monitoring functions.144.3.1.1Processor monitoring.144.3.1.2Transmit frequency sub-system.154.3.2Power on/reset.154.3.3Network control reception and authorisation.164.3.3.1Network control authorisation.164.3.3.2Network control reception.164.4Initial burst rate transmission.175Recommendations.175.1Electrical safety while loading and unloading hazardous fuels or gases.175.2Electromagnetic immunity - General immunity between 2 GHz and 3 GHz.175.3Compliance with RF specifications under conditions of shock and vibration.185.4Method of attachment to the vehicle of the Externally Mounted Equipment (EME).186Network Control Facilities (NCFs) for LMES networks.18Annex A (normative):Environmental and test conditions.19A.1Environmental conditions.19A.2Test conditions.19Annex B (normative):Out-of-band unwanted emissions above 960 MHz - test procedure.20B.1Introduction.20B.2Measuring apparatus.20B.3Equipment Under Test (EUT).20B.4Special Test Equipment (STE).20B.5Test set-up.21SIST ETS 300 255 E1:2003



Page 4ETS 300 255: May 1994B.6Measuring procedure.21B.7Alternative measuring procedure.21Annex C (normative):In-band unwanted emissions, test procedure.22C.1Introduction.22C.2Measuring apparatus.22C.3Equipment Under Test (EUT).22C.4Special Test Equipment (STE).22C.5Test set-up.22C.6Measuring procedure.23C.7Alternative measuring procedure.23Annex D (normative):Off-axis EIRP density, test procedure.24D.1Introduction.24D.2Measuring apparatus.24D.3Equipment Under Test (EUT).24D.4Special Test Equipment (STE).24D.5Test set-up.24D.6Measuring procedure.24Annex E (normative):Static rms antenna pointing accuracy.25E.1Introduction.25E.2Measuring apparatus.25E.3Equipment Under Test (EUT).25E.4Special Test Equipment (STE).25E.5Test set-up.25E.6Measuring procedures.25History.27SIST ETS 300 255 E1:2003



Page 5ETS 300 255: May 1994ForewordThis European Telecommunication Standard (ETS) has been produced by the Satellite Earth Stations andSystems (SES) Technical Committee of the European Telecommunications Standards Institute (ETSI).Every ETS prepared by ETSI is a voluntary standard. This ETS contains text concerning type approval ofthe 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 application by decisions ofregulatory bodies.SIST ETS 300 255 E1:2003



Page 6ETS 300 255: May 1994Blank pageSIST ETS 300 255 E1:2003



Page 7ETS 300 255: May 19941ScopeThis European Telecommunication Standard (ETS) provides specifications for the standardisation of thecharacteristics of Land Mobile Earth Stations (LMESs) with both transmit and receive capabilities in orderto 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 DataCommunications (LBRDC) for land mobile applications.The frequency bands under which the LMESs operate should be within the following bands:LMESs transmit14,00 - 14,25 GHzLMESs receive10,70 - 11,70 GHz12,50 - 12,75 GHzThese 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 3° satellite spacing environment with linear polarisation;-the antenna of the LMES may be omnidirectional or directional with a means of tracking thesatellite.Because the transmissions from the LMES to the satellite in the 14,00 - 14,25 GHz band fall under asecondary allocation, the transmissions should not cause harmful interference to primary services (e.g.Fixed Satellite Service (FSS)) and at the same time cannot claim protection from harmful interferencesfrom those services.The main specifications are contained in three categories related to:-safety: to protect personnel, public and goods from unsafe 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 probability that they originateunwanted transmissions that may give rise to harmful interference to other systems.This ETS deals with two types of specification:a)Essential normative requirements (indicated in Clause 4)Requirements are specified in order to protect other users of the frequency spectrum fromunacceptable interference. In addition, requirements are specified for the purposes of generalsafety.b)Recommendations (indicated in Clause 5)Recommendations are specified relating to matters of general safety, minimisation of interferenceto other users of the radio spectrum and for the provision of protection of the LMES againstelectromagnetic interference from other systems.All tests related to the requirements shall be performed and the results entered in the data sheets of thetest report. The ability to comply with the recommendations shall also be noted in the data sheets of thetest report. All parameters and operational conditions declared by the manufacturer shall be entered in thetest report.SIST ETS 300 255 E1:2003



Page 8ETS 300 255: May 19942Normative referencesThis ETS incorporates, by dated or undated references, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]IEC 215 (1987): "Safety requirements for radio transmitting equipment".[2]CISPR Publication No. 22 (1985): "Limits and methods of measurement of radiointerference characteristics of information technology equipment".[3]IEC 510-2-1 (1978): "Methods of measurement for radio equipment used insatellite earth stations, Part 2: Measurement for sub-systems".[4]ETS 300 282: "Satellite Earth Stations and Systems (SES); Network ControlFacilities (NCFs) for Land Mobile Earth Stations (LMESs) operating in the1,5/1,6 GHz and 11/12/14 GHz bands providing Low Bit Rate DataCommunications (LBRDCs)".[5]IEC 801-3 (1984): "Electromagnetic compatibility for industrial-processmeasurement and control equipment, Part 3: Radiated electromagnetic fieldrequirements".[6]CISPR Publication No. 16 (1987): "CISPR specification for radio interferencemeasuring apparatus and measurement methods".3Definitions and abbreviations3.1DefinitionsFor the purposes of this ETS, the following definitions apply:Installable Equipment (IE), Internally Mounted Equipment (IME) and Externally Mounted Equipment(EME): an Installable Equipment (IE) is an equipment which is intended to be installed in a vehicle. An IEmay consist of one or several interconnected modules. The manufacturer should indicate which modulesare intended to be Externally Mounted Equipment (EME); the remaining module(s) will then be defined asInternally Mounted Equipment (IME). Where different specifications apply to IME and EME, this is noted inthe text of this ETS.Portable Equipment (PE): a Portable Equipment (PE) is generally intended to be self-contained, freestanding and portable. PE would normally consist of a single module, but may consist of severalinterconnected modules. In some cases different specifications will apply to PE and this is noted in thetext of this ETS.Nominated bandwidth:
the bandwidth of the LMES radio frequency transmission is nominated by themanufacturer. The nominated bandwidth should encompass all close-in spectral elements of thetransmission which have a level greater than the specified spurious levels. The nominated bandwidthshould be wide enough to take account of the transmit carrier frequency stability. The nominatedbandwidth should be within the Ka transmit frequency band within which the LMES operates. The value ofthe 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 greater.SIST ETS 300 255 E1:2003



Page 9ETS 300 255: May 19943.2AbbreviationsFor the purposes of this ETS, the following abbreviations apply:CMFControl and Monitoring FunctionEIRPEquivalent Isotropically Radiated PowerEMElectro-MagneticEMEExternally Mounted EquipmentEUTEquipment Under TestIEInstallable EquipmentIMEInternally Mounted EquipmentLBRDCLow Bit Rate Data CommunicationLMSSLand Mobile Satellite ServiceLMESLand Mobile Earth StationNCFNetwork Control FacilityPEPortable EquipmentRFRadio Frequencyrmsroot mean squareSTESpecial Test Equipment4Requirements4.1Safety4.1.1Mechanical constructionPurpose:Protection of operating personnel, the public and goods from insecure or unsafe structures.Specification:For Installable Equipment (IE) and Portable Equipment (PE) the mechanical design, construction andfinish of the equipment shall conform to IEC 215 [1], section 3, paragraph 9.1.Verification:Verification shall be demonstrated by documentary evidence and visual inspection.4.1.2Electrical safety, power voltagesPurpose:Protection of operating personnel and the public from electric shock.Specification:The electrical safety of the equipment shall be in accordance with paragraphs 13, 14, 15 and 16 andAppendix B of IEC 215 [1].Verification:Conformance shall be determined by documentary evidence and visual inspection.4.1.3Radio frequency radiation protectionPurpose:To indicate the distance from the LMES below which RF power densities in excess of 10 W/m2, whenaveraged over a 6 minute period, may be experienced.SIST ETS 300 255 E1:2003



Page 10ETS 300 255: May 1994Specification:The radiating part of the equipment (which includes the exterior of any radome or other antenna enclosurewhere fitted) shall be labelled with a warning notice which shall be clearly visible when the equipment is inits normal operating configuration. This notice shall indicate the closest distance to the radiating part withinwhich a person may approach the equipment without experiencing radio frequency power density levels inexcess of 10 W/m2, when under worst case conditions (e.g. maximum power, maximum on/off ratio)averaged over a 6 minute period. This notice shall also state that before approaching the radiating partwithin any distance closer than that indicated, the LMES equipment shall be switched off or otherwisedisabled so that it shall not transmit.Where the equipment is vehicle mounted, a warning notice giving the same information as that affixed tothe radiating part shall be provided for fixing in the vehicle near to and clearly visible from the normaloperating position of the Internally Mounted Equipment (IME). In addition, for vehicle mounted equipmentwhere the radiating part is mounted in a position where it is not normally visible to a person standing onthe ground next to the vehicle, further warning notices shall be provided with instructions that they beattached to the vehicle so as to be clearly visible to anyone attempting to climb on to the part of the vehiclewhere 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 RFpower density greater than 10 W/m2, when under worst case conditions (e.g. maximum power, maximumon/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 indicatedabove. Instead, the radiating part shall be clearly labelled with a warning that the LMES equipment shallbe switched off, or otherwise disabled, so that it shall not transmit before any work requiring the removalof the radome or antenna enclosure takes place. Where the equipment is vehicle mounted, a labelcontaining the same warning shall be provided, to be mounted in the vehicle near to, and clearly visiblefrom, 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 worstcase conditions (e.g. maximum power, maximum on/off ratio) averaged over a 6 minute period, shall beby documentary evidence. The manufacturer shall quantify the worst case conditions.Conformance with the labelling requirements of this subclause shall be demonstrated by visual inspectionof the radiating part and, if relevant, an examination of the notices provided by the manufacturer foraffixing to vehicles, and the instructions provided relating to the affixing of these notices.4.2Radio Frequency (RF)In this subclause, whenever a change of limit between adjacent frequency bands occurs, the lower of thetwo limits shall apply at the transition frequency.4.2.1Unwanted emissions outside the band 14,00 - 14,25 GHzPurpose:Protection of terrestrial and satellite services from emissions caused by LMESs outside the band 14,00 -14,25 GHz.Specification:The unwanted emissions from the LMES outside the band 14,00 GHz to 14,25 GHz, within which theLMES is designed to operate, shall be below the following limits:-for unwanted emissions below 960 MHz, the LMES shall meet the requirements of CISPRPublication No. 22 [2] for class B equipment, with carrier on as given in table 1.SIST ETS 300 255 E1:2003



Page 11ETS 300 255: May 1994Table 1Limits of radiated emission at a test distance of 10 m in a 120 kHz bandwidthFrequency (MHz)Quasi-peak Limits (dBµV/m)30 to 23030230 to 96037-the unwanted emissions EIRP above 960 MHz, in the measurement bandwidth and in all directionsshall not exceed the limits given in table 2.Table 2Frequency rangeCarrier OnCarrier OffMHzEIRP limit (dBpW)Measurementbandwidth (kHz)EIRP limit (dBpW)Measurementbandwidth (kHz)960 - 1 52549100481001 525 - 1 559491001731 559 - 3 40049100481003 400 - 10 700551004810010 700 - 21 200611005410021 200 - 40 0006710050100Verification:By measurement of unwanted emissions generated by an operating LMES.All RF tests in this subclause shall be carried out at ambient environmental conditions and for a nominalpower supply voltage.All tests with carrier on shall be undertaken with the transmitter operating at full power and with themaximum transmit burst rate where applicable.To enable the performance tests to be carried out, the use of Special Test Equipment (STE), madeavailable by the manufacturer or system provider, may be necessary. Since this test equipment will bespecific for the particular system, it is not possible to provide detailed specifications in this ETS. However,the following baseline is provided:-if the LMES requires to receive a modulated carrier from the satellite in order to transmit, thenspecial test arrangements are required to simulate the satellite signal, thus enabling the LMES totransmit allowing measurement of transmission parameters;-any characteristic of these special test arrangements which may have direct or indirect effects onthe parameters to be measured shall be clearly stated by the manufacturer.Test procedure:Below 960 MHz, the test procedures set out in CISPR Publication No. 22 [2], paragraphs 5, 6, 7, 8 and 10shall be used.Above 960 MHz, the full system shall be tested according to the test procedure given in Annex B.Where it is possible, two LMES transmit frequencies shall be used for this test; these shall be selected tobe as close as possible to the upper and lower limits of the transmit frequency band of the LMES,declared by the manufacturer to be intended for operational use of the LMES. The upper and lowerextremes of the tuning range stated by the manufacturer shall be entered in the test report.4.2.2Maximum unwanted emission within the 14,00 GHz to 14,25 GHz bandPurpose:Protection of the primary services operating in the above frequency band.SIST ETS 300 255 E1:2003



Page 12ETS 300 255: May 1994Specification:When the carrier is on, in the 14,00 - 14,25 GHz band and outside the nominated bandwidth, the EIRPspectral density of the unwanted emissions shall not exceed 4 - 10 log N dBW/100 kHz.N is the maximum number of LMESs which are expected to transmit simultaneously on the samefrequency. This number shall not be exceeded for more than 0,01 % of the time. The value of N and theoperational conditions of the system shall be declared by the manufacturer.When the carrier is off, the EIRP spectral density of the unwanted emissions in the 14,00 GHz to 14,25GHz band shall not exceed - 21 dBW/100 kHz.Verification:Conformance shall be determined by direct measurement.The conditions (environment, power, STE etc.) set out in the verification section of subclause 4.2.1 shallapply.Test procedure:The measurement shall be performed by either of the two following methods:a)in the first method, the full system shall be tested according to the test procedure presented inAnnex C;b)in the second method, the power of the unwanted emissions at the interface point between theantenna and the remaining EME shall be measured according to the alternative measurementmethod in Annex C. The antenna on-axis gain shall be measured according to the measurementmethods in IEC 510-2-1 [3]. The EIRP of the unwanted radiation shall be calculated from the abovetwo measurements.4.2.3Off-axis EIRP emissions density in the nominated bandwidthPurpose:Protection of other satellite systems which use the same frequency band.Specification:For directional antennas the maximum EIRP in any 40 kHz band from any LMES in any direction fdegrees from the antenna main beam axis shall not exceed the following limits within 3° of thegeostationary orbit:33 - 25 log (f + df) - 10log (K) dBW/ 40kHzfor2,5°£ f + df £
7,0°;
12 - 10log (K) dBW/ 40kHzfor7,0°< f + df £
9,2°;36 - 25 log (f + df) - 10log (K) dBW/ 40kHzfor9,2°< f + df £48,0°;
- 6
- 10log (K) dBW/ 40kHzfor
f + df >48,0°;where f is the angle, in degrees, between the main beam axis and the direction considered. The value of df is equal to either:a)the RMS antenna tracking accuracy; orb)twice the static RMS antenna pointing accuracy;whichever is the larger.SIST ETS 300 255 E1:2003



Page 13ETS 300 255: May 1994K is the power density ratio between the fully loaded system and a single LMES measured in a 40 kHzbandwidth.The value of K and the operational conditions of the system shall be declared by the manufacturer.These limits apply over the European land mass, and for the geostationary orbital arc declared by themanufacturer.For non-directional antennas, the maximum EIRP per 40 kHz in any direction shall not exceed:- 6 - 10 log (K) dBW/40 kHz;where K is as defined above.Verification:Conformance shall be calculated from:-measurement of maximum RF power entering the antenna feed;-measurement of transmit antenna gain pattern;-measurement of the static RMS antenna pointing accuracy and a consideration of the RMS antennatracking accuracy provided by the manufacturer.The conditions (environment, power, STE etc.) set out in the verification section of subclause 4.2.1 shallapply.Test procedure:The test procedure for the measurement of the RF power shall be in accordance with that specified inAnnex D.The antenna gain pattern in dB relative to an isotropic antenna shall be measured in a cut at an anglerelative to the horizontal plane corresponding to the worst operational case (in terms of off-axis EIRP) withregard to the relative position between the geostationary arc and the antenna beam. The manufacturershall demonstrate by documentary evidence the worst operational case (in terms of off-axis EIRP) withregard to the relative position between the geostationary arc and the antenna beam.The gain pattern shall be measured in accordance with IEC 510-2-1 [3], section 8.2.2 for threefrequencies; one frequency close to each end of the transmit frequency band which could be used by theLMES, and one frequency in the centre of this band. The gain profile to be used in the test procedure shallbe the maximum envelope of the three profiles measured.The static rms antenna pointing accuracy shall be determined according to the test procedure set out inAnnex E.For an IE, the manufacturer shall provide documentary evidence of the RMS antenna tracking accuracywithin which at least 99 % of LMESs maintain their pointing during normal vehicle manoeuvrescorresponding to the constraints described in Annex A, items a), b) and e).A knowledge of the measured RF power entering the antenna feed and the measured antenna gain profilewill allow the off-axis EIRP profile to be determined. This shall be compared to the limits set in thespecification of this subclause and if equal to or lower than these limits for all off axis angles, the LMESshall be in conformance with this subclause.SIST ETS 300 255 E1:2003



Page 14ETS 300 255: May 19944.2.4Electromagnetic immunityPurpose:To limit interference to radio communications services and to protect the LMES when the LMES issubjected to interfering electromagnetic fields up to 2 GHz caused by other equipment. Beyond 2 GHz, arecommendation is given in subclause 5.2 of this ETS.Specification:The LMES shall have an adequate level of intrinsic immunity to enable it to op
...

SLOVENSKI STANDARD
SIST ETS 300 255 E1:2003
01-december-2003
Satelitske zemeljske postaje in sistemi (SES) – Kopenske mobilne zemeljske
postaje (LMES), ki delujejo v pasovih 11/12/14 GHz, ki zagotavljajo podatkovne
komunikacije z nizko bitno hitrostjo (LBRDC)
Satellite Earth Stations and Systems (SES); Land Mobile Earth Stations (LMESs)
operating in the 11/12/14 GHz bands providing Low Bit Rate Data Communications
(LBRDC)
Ta slovenski standard je istoveten z: ETS 300 255 Edition 1
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
SIST ETS 300 255 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 255 E1:2003

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SIST ETS 300 255 E1:2003
EUROPEAN ETS 300 255
TELECOMMUNICATION May 1994
STANDARD
Source: ETSI TC-SES Reference: DE/SES-05002
ICS: 33.060.30
LMES, LBRDC
Key words:
Satellite Earth Stations and Systems (SES);
Land Mobile Earth Stations (LMESs)
operating in the 11/12/14 GHz bands
providing Low Bit Rate Data Communications (LBRDCs)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1994. All rights reserved.
New presentation - see History box

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SIST ETS 300 255 E1:2003
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ETS 300 255: May 1994
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 Committee Support Dept." at the address shown on the title page.

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SIST ETS 300 255 E1:2003
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ETS 300 255: May 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 Requirements.9
4.1 Safety.9
4.1.1 Mechanical construction.9
4.1.2 Electrical safety, power voltages .9
4.1.3 Radio frequency radiation protection.9
4.2 Radio Frequency (RF) .10
4.2.1 Unwanted emissions outside the band 14,00 - 14,25 GHz .10
4.2.2 Maximum unwanted emission within the 14,00 GHz to 14,25 GHz band .11
4.2.3 Off-axis EIRP emissions density in the nominated bandwidth .12
4.2.4 Electromagnetic immunity .14
4.3 LMES Control and Monitoring Functions (CMF).14
4.3.1 Monitoring functions .14
4.3.1.1 Processor monitoring.14
4.3.1.2 Transmit frequency sub-system .15
4.3.2 Power on/reset .15
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
4.4 Initial burst rate transmission .17
5 Recommendations .17
5.1 Electrical safety while loading and unloading hazardous fuels or gases .17
5.2 Electromagnetic immunity - General immunity between 2 GHz and 3 GHz .17
5.3 Compliance with RF specifications under conditions of shock and vibration .18
5.4 Method of attachment to the vehicle of the Externally Mounted Equipment (EME).18
6 Network Control Facilities (NCFs) for LMES networks .18
Annex A (normative): Environmental and test conditions.19
A.1 Environmental conditions .19
A.2 Test conditions .19
Annex B (normative): Out-of-band unwanted emissions above 960 MHz - test procedure .20
B.1 Introduction.20
B.2 Measuring apparatus.20
B.3 Equipment Under Test (EUT).20
B.4 Special Test Equipment (STE).20
B.5 Test set-up .21

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ETS 300 255: May 1994
B.6 Measuring procedure. 21
B.7 Alternative measuring procedure. 21
Annex C (normative): In-band unwanted emissions, test procedure. 22
C.1 Introduction. 22
C.2 Measuring apparatus. 22
C.3 Equipment Under Test (EUT). 22
C.4 Special Test Equipment (STE) . 22
C.5 Test set-up. 22
C.6 Measuring procedure. 23
C.7 Alternative measuring procedure. 23
Annex D (normative): Off-axis EIRP density, test procedure. 24
D.1 Introduction. 24
D.2 Measuring apparatus. 24
D.3 Equipment Under Test (EUT). 24
D.4 Special Test Equipment (STE) . 24
D.5 Test set-up. 24
D.6 Measuring procedure. 24
Annex E (normative): Static rms antenna pointing accuracy. 25
E.1 Introduction. 25
E.2 Measuring apparatus. 25
E.3 Equipment Under Test (EUT). 25
E.4 Special Test Equipment (STE) . 25
E.5 Test set-up. 25
E.6 Measuring procedures. 25
History. 27

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SIST ETS 300 255 E1:2003
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ETS 300 255: May 1994
Foreword
This European Telecommunication Standard (ETS) has been produced by the Satellite Earth Stations and
Systems (SES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
Every ETS 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 application by decisions of
regulatory bodies.

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SIST ETS 300 255 E1:2003
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ETS 300 255: May 1994
Blank page

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SIST ETS 300 255 E1:2003
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ETS 300 255: May 1994
1 Scope
This European Telecommunication Standard (ETS) provides specifications for the standardisation of the
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
Communications (LBRDC) for land mobile applications.
The frequency bands under which the LMESs operate should be within the following bands:
LMESs transmit 14,00 - 14,25 GHz
LMESs receive 10,70 - 11,70 GHz
12,50 - 12,75 GHz
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 3° satellite spacing 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 14,00 - 14,25 GHz band fall under a
secondary allocation, the transmissions should not cause harmful interference to primary services (e.g.
Fixed Satellite Service (FSS)) 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 unsafe 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 probability that they originate
unwanted transmissions that may give rise to harmful interference to other systems.
This ETS deals with two types of specification:
a) Essential normative requirements (indicated in Clause 4)
Requirements are specified in order to protect other users of the frequency 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 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 sheets of the
test report. All parameters and operational conditions declared by the manufacturer shall be entered in the
test report.

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2 Normative references
This ETS incorporates, by dated or undated references, provisions from other 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 undated references the latest
edition of the publication referred to applies.
[1] IEC 215 (1987): "Safety requirements for radio transmitting equipment".
[2] CISPR Publication No. 22 (1985): "Limits and methods of measurement of radio
interference characteristics of information technology equipment".
[3] IEC 510-2-1 (1978): "Methods of measurement for radio equipment used in
satellite earth stations, Part 2: Measurement for sub-systems".
[4] ETS 300 282: "Satellite Earth Stations and Systems (SES); Network Control
Facilities (NCFs) for Land Mobile Earth Stations (LMESs) operating in the
1,5/1,6 GHz and 11/12/14 GHz bands providing Low Bit Rate Data
Communications (LBRDCs)".
[5] IEC 801-3 (1984): "Electromagnetic compatibility for industrial-process
measurement and control equipment, Part 3: Radiated electromagnetic field
requirements".
[6] CISPR Publication No. 16 (1987): "CISPR specification for radio interference
measuring apparatus and measurement methods".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
Installable Equipment (IE), Internally Mounted Equipment (IME) and Externally Mounted Equipment
(EME): an Installable 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
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 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 all 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 which 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 greater.

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3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
CMF Control and Monitoring Function
EIRP Equivalent Isotropically Radiated Power
EM Electro-Magnetic
EME Externally Mounted Equipment
EUT Equipment Under Test
IE Installable Equipment
IME Internally Mounted Equipment
LBRDC Low Bit Rate Data Communication
LMSS Land Mobile Satellite Service
LMES Land Mobile Earth Station
NCF Network Control Facility
PE Portable Equipment
RF Radio Frequency
rms root mean square
STE Special Test Equipment
4 Requirements
4.1 Safety
4.1.1 Mechanical construction
Purpose:
Protection of operating personnel, the public and goods from insecure or unsafe structures.
Specification:
For Installable Equipment (IE) and Portable Equipment (PE) the mechanical design, construction and
finish of the equipment shall conform to IEC 215 [1], 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 safety of the equipment shall be in accordance with paragraphs 13, 14, 15 and 16 and
Appendix B of IEC 215 [1].
Verification:
Conformance shall be determined by documentary evidence and visual inspection.
4.1.3 Radio frequency radiation protection
Purpose:
2
To indicate the distance from the LMES below which RF power densities in excess of 10 W/m , when
averaged over a 6 minute period, may be experienced.

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Specification:
The radiating part of the equipment (which includes the exterior of any radome or other antenna enclosure
where fitted) 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 density levels in
2
excess of 10 W/m , when under worst case conditions (e.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 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 Internally 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 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
2
power density greater than 10 W/m , when under worst 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 shall 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 warning shall be provided, to be mounted in the vehicle near to, and clearly visible
from, the normal operating position of the IME.
Verification:
2
Verification of the distance below which exist RF power densities in excess of 10 W/m , when under worst
case conditions (e.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 radiating part and, if relevant, an examination of the notices provided by the manufacturer for
affixing to vehicles, and the instructions provided relating to the affixing of these notices.
4.2 Radio Frequency (RF)
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.
4.2.1 Unwanted emissions outside the band 14,00 - 14,25 GHz
Purpose:
Protection of terrestrial and satellite services from emissions caused by LMESs outside the band 14,00 -
14,25 GHz.
Specification:
The unwanted emissions from the LMES outside the band 14,00 GHz to 14,25 GHz, within which the
LMES is designed to operate, shall be below the following limits:
- for unwanted emissions below 960 MHz, the LMES shall meet the requirements of CISPR
Publication No. 22 [2] for class B equipment, with carrier on as given in table 1.

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Table 1
Limits of radiated emission at a test distance of 10 m in a 120 kHz bandwidth
Frequency (MHz) Quasi-peak Limits (dBμV/m)
30 to 230 30
230 to 960 37
- the unwanted emissions EIRP above 960 MHz, in the measurement bandwidth and in all directions
shall not exceed the limits given in table 2.
Table 2
Frequency range Carrier On Carrier Off
MHz EIRP limit (dBpW) Measurement EIRP limit (dBpW) Measurement
bandwidth (kHz) bandwidth (kHz)
960 - 1 525 49 100 48 100
1 525 - 1 559 49 100 17 3
1 559 - 3 400 49 100 48 100
3 400 - 10 700 55 100 48 100
10 700 - 21 200 61 100 54 100
21 200 - 40 000 67 100 50 100
Verification:
By measurement of unwanted emissions generated by an operating LMES.
All RF tests in this subclause shall be carried out at ambient environmental conditions and for a nominal
power supply voltage.
All tests with carrier on shall be undertaken with the transmitter operating at full power and with the
maximum transmit burst rate where applicable.
To enable the performance tests to be carried out, the use of Special Test Equipment (STE), made
available by the manufacturer or system provider, may be necessary. Since this test equipment will be
specific for the particular system, it is not possible to provide detailed specifications in this ETS. However,
the following baseline is provided:
- if the LMES requires to receive a modulated carrier from the satellite in order to transmit, then
special test arrangements are required to simulate the satellite signal, thus enabling the LMES to
transmit allowing measurement of transmission parameters;
- any characteristic of these special test arrangements which may have direct or indirect effects on
the parameters to be measured shall be clearly stated by the manufacturer.
Test procedure:
Below 960 MHz, the test procedures set out in CISPR Publication No. 22 [2], paragraphs 5, 6, 7, 8 and 10
shall be used.
Above 960 MHz, the full system shall be tested according to the test procedure given in Annex B.
Where it is possible, two LMES transmit frequencies shall be used for this test; these shall be selected to
be as close as possible to the upper and lower limits of the transmit frequency band of the LMES,
declared by the manufacturer to be intended for operational use of the LMES. The upper and lower
extremes of the tuning range stated by the manufacturer shall be entered in the test report.
4.2.2 Maximum unwanted emission within the 14,00 GHz to 14,25 GHz band
Purpose:
Protection of the primary services operating in the above frequency band.

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Specification:
When the carrier is on, in the 14,00 - 14,25 GHz band and outside the nominated bandwidth, the EIRP
spectral density of the unwanted emissions shall not exceed 4 - 10 log N dBW/100 kHz.
N is the maximum number of LMESs which are expected to transmit simultaneously on the same
frequency. This number shall not be exceeded for more than 0,01 % of the time. The value of N and the
operational conditions of the system shall be declared by the manufacturer.
When the carrier is off, the EIRP spectral density of the unwanted emissions in the 14,00 GHz to 14,25
GHz band shall not exceed - 21 dBW/100 kHz.
Verification:
Conformance shall be determined by direct measurement.
The conditions (environment, power, STE etc.) set out in the verification section of subclause 4.2.1 shall
apply.
Test procedure:
The measurement shall be performed by either of the two following methods:
a) in the first method, the full system shall be tested according to the test procedure presented in
Annex C;
b) in the second method, the power of the unwanted emissions at the interface point between the
antenna and the remaining EME shall be measured according to the alternative measurement
method in Annex C. The antenna on-axis gain shall be measured according to the measurement
methods in IEC 510-2-1 [3]. The EIRP of the unwanted radiation shall be calculated from the above
two measurements.
4.2.3 Off-axis EIRP emissions density in the nominated bandwidth
Purpose:
Protection of other satellite systems which use the same frequency band.
Specification:
For directional antennas the maximum EIRP in any 40 kHz band from any LMES in any direction φ
degrees from the antenna main beam axis shall not exceed the following limits within 3° of the
geostationary orbit:
33 - 25 log (φ + δφ) - 10 log (K) dBW/ 40kHz for 2,5° ≤ φ + δφ ≤ 7,0°;
            12 - 10 log (K) dBW/ 40kHz for 7,0° < φ + δφ ≤ 9,2°;
36 - 25 log (φ + δφ) - 10 log (K) dBW/ 40kHz for 9,2° < φ + δφ ≤ 48,0°;
            - 6 - 10 log (K) dBW/ 40kHz for  φ + δφ > 48,0°;
where φ is the angle, in degrees, between the main beam axis and the direction considered. The value of
δφ is equal to either:
a) the RMS antenna tracking accuracy; or
b) twice the static RMS antenna pointing accuracy;
whichever is the larger.

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K is the power density ratio between the fully loaded system and a single LMES measured in a 40 kHz
bandwidth.
The value of K and the operational conditions of the system shall be declared by the manufacturer.
These limits apply over the European land mass, and for the geostationary orbital arc declared by the
manufacturer.
For non-directional antennas, the maximum EIRP per 40 kHz in any direction shall not exceed:
- 6 - 10 log (K) dBW/40 kHz;
where K is as defined above.
Verification:
Conformance shall be calculated from:
- measurement of maximum RF power entering the antenna feed;
- measurement of transmit antenna gain pattern;
- measurement of the static RMS antenna pointing accuracy and a consideration of the RMS antenna
tracking accuracy provided by the manufacturer.
The conditions (environment, power, STE etc.) set out in the verification section of subclause 4.2.1 shall
apply.
Test procedure:
The test procedure for the measurement of the RF power shall be in accordance with that specified in
Annex D.
The antenna gain pattern in dB relative to an isotropic antenna shall be measured in a cut at an angle
relative to the horizontal plane corresponding to the worst operational case (in terms of off-axis EIRP) with
regard to the relative position between the geostationary arc and the antenna beam. The manufacturer
shall demonstrate by documentary evidence the worst operational case (in terms of off-axis EIRP) with
regard to the relativ
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