SIST EN 303 213-6-1 V2.1.1:2016
(Main)The present document applies to X-band radar sensors intended for the surveillance of airport surface movement traffic
with the following characteristics:
• Operating in one or both of the following frequency ranges:
- 9 000 MHz to 9 200 MHz and 9 300 MHz to 9 500 MHz utilizing modulated or unmodulated pulses.
• Transmitter Peak Envelope Power up to 100 kW.
• The transceiver-antenna connection is using a hollow metallic rectangular waveguide.
• The antenna is rotating, waveguide-based and passive.
• At the transceiver output an RF-circulator is used.
NOTE 1: Since transceiver and antenna are hollow metallic rectangular waveguide based the frequency range for
measurements that needs to be addressed covers 6,56 GHz to 26 GHz. The lower limit of this frequency
range is obtained as cut-off frequency of the combination of WR112/R84 taper section and a WR90/R100
Waveguide IEC 60153-2 [i.3]. The upper limit corresponds to the upper limit stated in
ERC/Recommendation 74-01 [i.5].
NOTE 2: Since at the transceiver output an RF circulator is used, it is assumed that the transceiver characteristics
remain independent from the antenna.
NOTE 3: Aeronautical Surface Movement Radars covered by the present document are expected to use the bands
9 000 MHz to 9 200 MHz and/or 9 300 MHz to 9 500 MHz. According article 5 of the ITU Radio
Regulations [i.6] the band 9 000 MHz to 9 200 MHz is allocated to the Aeronautical Radionavigation
Service on a primary basis and the band 9 300 MHz to 9 500 MHz is allocated to the Radionavigation
Service on a primary basis.
The present document contains requirements to demonstrate that "... Radio equipment shall be so constructed that it
both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference" [i.1].
In addition to the present document, other ENs that specify technical requirements in respect of essential requirements
under other parts of article 3 of the Radio Equipment Directive 2014/53/EU [i.1] as well as essential requirements under
the SES Interoperability Regulation 552/2004 [i.9] and related implementing rules and/or essential requirements under
the EASA basic regulation 216/2008 [i.12] may apply to equipment within the scope of the present document.
Napredni sistem za vodenje in nadzor gibanja po zemlji (A-SMGCS) - 6. del: Harmonizirani standard, ki zajema bistvene zahteve člena 3.2 direktive 2014/53/EU za aktivno zaznavalo radarja za površinsko gibanje - 1. poddel: Zaznavala, ki delujejo v frekvenčnem pasu X (10,525 GHz), z impulznimi signali in oddajno močjo do 100 kW
Ta dokument velja za zaznavala radarja v frekvenčnem pasu X za nadzor prometa na letaliških površinah, ki ima naslednje značilnosti:
• Delovanje v enem ali obeh frekvenčnih območjih v nadaljevanju:
– od 9000 do 9200 MHz in od 9300 do 9500 MHz z uporabo moduliranih ali nemoduliranih pulzov.
• Oddajnik Peak Envelope Power do 100 kW.
• Antena oddajno-sprejemne naprave uporablja votel pravokoten kovinski valovod.
• Antena se pasivno vrti glede na valovod.
• Na izhodu oddajno-sprejemne naprave je uporabljena radiofrekvenčna obtočna črpalka.
OPOMBA 1: Ker sta oddajno-sprejemna naprava in antena votel kovinski pravokoten valovod, je frekvenčno območje za meritve od 6,56 do 26 GHz. Nižja spodnja vrednost tega frekvenčnega območja se dobi kot mejna frekvenca kombinacije zoženega dela obtočne črpalke WR112/R84 in valovoda WR90/R100, kot je določeno v standardu IEC 60153-2 [i.3]. Zgornja meja ustreza zgornji meji, navedeni v priporočilu ERC 74-01 [i.5].
OPOMBA 2: Ker je na izhodu oddajno-sprejemne naprave uporabljena radiofrekvenčna obtočna črpalka, se predvideva, da so značilnosti oddajno-sprejemne naprave neodvisne od antene.
OPOMBA 3: Za radarje za površinsko gibanje na letališču, ki so zajeti v tem dokumentu, se pričakuje uporaba pasov od 9000 do 9200 MHz in/ali od 9300 do 9 500 MHz. Glede na člen 5 Pravilnika o radiokomunikacijah Mednarodne telekomunikacijske zveze [i.6] je pas med 9000 in 9200 MHz namenjen zlasti aeronavtičnim radionavigacijskim službam, pas med 9300 in 9500 MHz pa je prvotno namenjen radionavigacijskim službam.
Ta dokument vsebuje zahteve, s katerimi se dokazuje, da »... je radijska oprema sestavljena tako, da učinkovito uporablja in tudi podpira učinkovito uporabo radijskega spektra, tako da ne pride do škodljivih motenj« [i.1].
Poleg tega dokumenta se lahko za opremo na področju uporabe tega dokumenta uporabljajo tudi drugi standardi EN, ki določajo tehnične zahteve v zvezi z bistvenimi zahtevami iz drugih delov člena 3 direktive o radijski opremi 2014/53/EU [i.1], ter tudi bistvene zahteve iz Uredbe o interoperabilnosti enotnega evropskega neba (ES) 552/2004 [i.9] in zadevna izvedbena pravila in/ali bistvene zahteve iz Uredbe EASA 216/2008 [i.12].
General Information
Standards Content (sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Advanced Surface Movement Guidance and Control System (A-SMGCS) - Part 6: Harmonised Standard covering the essential requirements of article 3.2 of the Directive 2014/53/EU for deployed surface movement radar sensors - Sub-part 1: X-band sensors using pulsed signals and transmitting power up to 100 kW49.090On-board equipment and instruments03.220.50Air transportICS:Ta slovenski standard je istoveten z:ETSI EN 303 213-6-1 V2.1.1 (2016-05)SIST EN 303 213-6-1 V2.1.1:2016en01-julij-2016SIST EN 303 213-6-1 V2.1.1:2016SLOVENSKI
STANDARDSIST EN 303 213-6-1 V2.1.1:2016
ETSI EN 303 213-6-1 V2.1.1 (2016-05) Advanced Surface Movement Guidance and Control System (A-SMGCS); Part 6: Harmonised Standard covering the essential requirements of article 3.2 of the Directive 2014/53/EU for deployed surface movement radar sensors; Sub-part 1: X-band sensors using pulsed signals and transmitting power up to 100 kW
HARMONISED EUROPEAN STANDARD SIST EN 303 213-6-1 V2.1.1:2016ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)2
Reference REN/ERM-JTFEA-20 Keywords aeronautical, ATM, interoperability, regulation ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)3 Contents Intellectual Property Rights ................................................................................................................................ 5 Foreword ............................................................................................................................................................. 5 Modal verbs terminology .................................................................................................................................... 6 Executive Summary ............................................................................................................................................ 6 1 Scope ........................................................................................................................................................ 7 2 References ................................................................................................................................................ 7 2.1 Normative references ......................................................................................................................................... 7 2.2 Informative references ........................................................................................................................................ 8 3 Definitions, symbols and abbreviations ................................................................................................... 8 3.1 Definitions .......................................................................................................................................................... 8 3.2 Symbols .............................................................................................................................................................. 9 3.3 Abbreviations ..................................................................................................................................................... 9 4 Technical requirements specifications ................................................................................................... 10 4.1 Environmental profile ....................................................................................................................................... 10 4.2 Conformance requirements .............................................................................................................................. 10 4.2.1 Transmitter requirements ............................................................................................................................ 10 4.2.1.1 Operating frequency .............................................................................................................................. 10 4.2.1.1.1 Definition......................................................................................................................................... 10 4.2.1.1.2 Limits .............................................................................................................................................. 10 4.2.1.1.3 Conformance ................................................................................................................................... 10 4.2.1.2 Transmitter power ................................................................................................................................. 10 4.2.1.2.1 Definition......................................................................................................................................... 10 4.2.1.2.2 Limits .............................................................................................................................................. 10 4.2.1.2.3 Conformance ................................................................................................................................... 10 4.2.1.3 Out-of-band emissions .......................................................................................................................... 11 4.2.1.3.1 Definition......................................................................................................................................... 11 4.2.1.3.2 Limits .............................................................................................................................................. 12 4.2.1.3.3 Conformance ................................................................................................................................... 13 4.2.1.4 Spurious emissions ................................................................................................................................ 13 4.2.1.4.1 Definition......................................................................................................................................... 13 4.2.1.4.2 Limits .............................................................................................................................................. 14 4.2.1.4.3 Conformance ................................................................................................................................... 14 4.2.2 Receiver requirements ................................................................................................................................ 14 4.2.2.1 Receiver Selectivity .............................................................................................................................. 14 4.2.2.1.1 Limit ................................................................................................................................................ 14 4.2.2.1.2 Conformance ................................................................................................................................... 15 5 Testing for compliance with technical requirements .............................................................................. 15 5.0 General requirements ....................................................................................................................................... 15 5.1 Environmental conditions for testing ............................................................................................................... 15 5.1.1 Introduction................................................................................................................................................. 15 5.1.2 Standard operation mode for testing ........................................................................................................... 15 5.1.3 Normal temperature and humidity .............................................................................................................. 15 5.1.4 Normal test power supply ........................................................................................................................... 15 5.2 Interpretation of the measurements results ....................................................................................................... 15 5.3 Radio test suites ................................................................................................................................................ 16 5.3.1 Transmitter test specification ...................................................................................................................... 16 5.3.1.1 Operating frequency .............................................................................................................................. 16 5.3.1.2 Transmitter power ................................................................................................................................. 16 5.3.1.3 Out-of-Band-emissions ......................................................................................................................... 17 5.3.1.4 Spurious emissions ................................................................................................................................ 18 5.3.2 Receiver test specification .......................................................................................................................... 19 5.3.2.1 Receiver Selectivity .............................................................................................................................. 19 5.3.2.1.0 General ............................................................................................................................................ 19 5.3.2.1.1 Receiver Out-of-Band selectivity .................................................................................................... 19 SIST EN 303 213-6-1 V2.1.1:2016
ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)4 5.3.2.1.2 Receiver spurious response rejection............................................................................................... 20 Annex A (normative): Relationship between the present document and the essential requirements of Directive 2014/53/EU ......................................................... 21 Annex B (normative): Transmission power and unwanted emissions of radar systems with indirect methods ............................................................................................. 22 Annex C (informative): Bibliography ................................................................................................... 23 History .............................................................................................................................................................. 24
SIST EN 303 213-6-1 V2.1.1:2016ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https://ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM). The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.13] to provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC [i.1]. Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with the normative clauses of the present document given in table A.1 confers, within the limits of the scope of the present document, a presumption of conformity with the corresponding essential requirements of that Directive, and associated EFTA regulations. The present document is part 6, sub-part 1 of a multi-part deliverable covering Advanced Surface Movement Guidance and Control System (A-SMGCS), as identified below: Part 1: "Community Specification for application under the Single European Sky Interoperability Regulation EC 552/2004 for A-SMGCS Level 1 including external interfaces"; Part 2: "Community Specification for application under the Single European Sky Interoperability Regulation EC 552/2004 for A-SMGCS Level 2 including external interfaces"; Part 3: "Community Specification for application under the Single European Sky Interoperability Regulation EC 552/2004 for a deployed cooperative sensor including its interfaces"; Part 4: "Community Specification for application under the Single European Sky Interoperability Regulation EC 552/2004 for a deployed non-cooperative sensor including its interfaces "; Part 5: "Harmonised Standard covering the essential requirements of article 3.2 of the Directive 2014/53/EU for multilateration equipment"; Part 6: "Harmonised Standard covering the essential requirements of article 3.2 of the Directive 2014/53/EU for deployed surface movement radar sensors"; Sub-part 1: "X-band sensors using pulsed signals and transmitting power up to 100 kW". NOTE: SMR systems using FM-CW signals may be covered by future sub-parts of this multi-part deliverable.
National transposition dates Date of adoption of this EN: 20 May 2016 Date of latest announcement of this EN (doa): 31 August 2016 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
28 February 2017 Date of withdrawal of any conflicting National Standard (dow): 28 February 2018 SIST EN 303 213-6-1 V2.1.1:2016
ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)6 Modal verbs terminology In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). "must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation. Executive Summary The present document covers the essential requirements for efficient use of radio spectrum by surface movement radar sensors in the bands 9 000 MHz to 9 200 MHz and 9 300 MHz to 9 500 MHz using pulsed signals and a transmitting power up to 100 kW. The current version includes necessary changes due to adaption to the new Radio Equipment Directive 2014/53/EU [i.1]. SIST EN 303 213-6-1 V2.1.1:2016
ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)7 1 Scope The present document applies to X-band radar sensors intended for the surveillance of airport surface movement traffic with the following characteristics: • Operating in one or both of the following frequency ranges: - 9 000 MHz to 9 200 MHz and 9 300 MHz to 9 500 MHz utilizing modulated or unmodulated pulses. • Transmitter Peak Envelope Power up to 100 kW. • The transceiver-antenna connection is using a hollow metallic rectangular waveguide. • The antenna is rotating, waveguide-based and passive. • At the transceiver output an RF-circulator is used. NOTE 1: Since transceiver and antenna are hollow metallic rectangular waveguide based the frequency range for measurements that needs to be addressed covers 6,56 GHz to 26 GHz. The lower limit of this frequency range is obtained as cut-off frequency of the combination of WR112/R84 taper section and a WR90/R100 Waveguide IEC 60153-2 [i.3]. The upper limit corresponds to the upper limit stated in ERC/Recommendation 74-01 [i.5]. NOTE 2: Since at the transceiver output an RF circulator is used, it is assumed that the transceiver characteristics remain independent from the antenna. NOTE 3: Aeronautical Surface Movement Radars covered by the present document are expected to use the bands 9 000 MHz to 9 200 MHz and/or 9 300 MHz to 9 500 MHz. According article 5 of the ITU Radio Regulations [i.6] the band 9 000 MHz to 9 200 MHz is allocated to the Aeronautical Radionavigation Service on a primary basis and the band 9 300 MHz to 9 500 MHz is allocated to the Radionavigation Service on a primary basis. The present document contains requirements to demonstrate that "... Radio equipment shall be so constructed that it both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference" [i.1]. In addition to the present document, other ENs that specify technical requirements in respect of essential requirements under other parts of article 3 of the Radio Equipment Directive 2014/53/EU [i.1] as well as essential requirements under the SES Interoperability Regulation 552/2004 [i.9] and related implementing rules and/or essential requirements under the EASA basic regulation 216/2008 [i.12] may apply to equipment within the scope of the present document. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. Not applicable. SIST EN 303 213-6-1 V2.1.1:2016
ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)8 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC. [i.2] Merrill I. Skolnik: "Radar Handbook", 2nd Edition, McGraw Hill publications. [i.3] IEC 60153-2 (Edition 2.0, 1974): "Hollow metallic waveguides. Part 2: Relevant specifications for ordinary rectangular waveguides". [i.4] ECC/Recommendation (02)05 (2012): "Unwanted emissions". [i.5] ERC/Recommendation 74-01 (2011): "Unwanted emissions in the spurious domain". [i.6] ITU Radio Regulations (2012). [i.7] Recommendation ITU-R M.1177-4 (2011): "Techniques for measurement of unwanted emissions of radar systems". [i.8] Recommendation ITU-R SM.1541-5 (2013): "Unwanted emissions in the out-of-band domain". [i.9] EC Regulation No 552/2004 of the European Parliament and of the Council of 10 March 2004 on the interoperability of the European Air Traffic Management network (interoperability Regulation), OJ L 96, 31.03.2004, p. 26 as amended by Regulation (EC) No 1070/2009, OJ L 300, 14.11.2009, p. 34. [i.10] ETSI TR 100 028 (all parts) (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics". [i.11] ETSI TR 100 028-2 (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics; Part 2". [i.12] Regulation (EC) 216/2008 of the European Parliament and of the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC. [i.13] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request to the European Committee for Electrotechnical Standardisation and to the European Telecommunications Standards Institute as regards radio equipment in support of Directive 2014/53/EU of the European Parliament and of the Council. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: necessary bandwidth: width of the frequency band which is just sufficient to ensure the transmission of information at the rate and with the quality required under specified conditions for a given class of emission NOTE: This definition is taken from ITU Radio Regulations [i.6]. SIST EN 303 213-6-1 V2.1.1:2016
ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)9 occupied bandwidth: width of a frequency band such that, below the lower and above the upper frequency limits, the mean powers emitted are each equal to a specified percentage β/2 of the total mean power of a given emission NOTE 1: This definition is taken from ITU Radio Regulations [i.6]. NOTE 2: Unless otherwise specified in an ITU-R Recommendation for the appropriate class of emission, the value of β/2 should be taken as 0,5 %. peak envelope power: average power supplied to the antenna transmission line by a transmitter during one radio frequency cycle at the crest of the modulation envelope taken under normal operating conditions NOTE: This definition is taken from ITU Radio Regulations [i.6]. pulse duration: time between the 50 % amplitude (voltage) points pulse rise time: time taken for the leading edge of the pulse to increase from 10 % to 90 % of the maximum amplitude (voltage) 3.2 Symbols For the purposes of the present document, the following symbols apply: B-40 -40 dB bandwidth BC Chirp bandwidth BN Necessary bandwidth Bres 3 dB resolution bandwidth of transceiver dB/dec dB per decade dBpp dB with respect to peak power Dno spur Detectability Factor (function of PD & Pfa) k
Boltzmann's constant MDS Minimum Detectable Signal NFsys Noise Figure of the system PD Probability of detection
Pfa Probability of false alarm Pt Pulse power of transmission t Time tp Pulse duration
tr Pulse rise time T0Temperature in Kelvin TC Chirp length in seconds λ Wavelength 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: AC Alternating Current A-SMGCS Advanced Surface Movement Guidance and Control System EASA European Aviation Safety Agency FM Frequency Modulation FM-CW Frequency Modulated Continuous Wave LNA Low Noise Amplifier MDS Minimum Detectable Signal OoB Out-of-Band PEP Peak Envelope Power RF Radio Frequency SES Single European Sky SMR Surface Movement Radar SIST EN 303 213-6-1 V2.1.1:2016
ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)10 4 Technical requirements specifications 4.1 Environmental profile The technical requirements of the present document apply under the environmental profile for operation of the equipment, which shall be declared by the supplier, but as a minimum, shall be that specified in the test conditions contained in the present document. The equipment shall comply with all the technical requirements of the present document at all times when operating within the boundary limits of the declared operational environmental profile. 4.2 Conformance requirements 4.2.1 Transmitter requirements 4.2.1.1 Operating frequency 4.2.1.1.1 Definition The transmitter of a pulsed radar produces microwave pulses, which cause a broad frequency spectrum, depending on the pulse duration. In the present document the operating frequency is considered to be the frequency of the microwave emission during the transmitting pulse and is represented by the spectral line of highest amplitude. NOTE: It is only practicable to indicate an operating frequency for radars with unmodulated pulses. In this case a limit for the frequency tolerance is specified. For radars with modulated pulses such a limit is not applicable. In any case the occupied bandwidth is completely contained in the allocated frequency band(s). 4.2.1.1.2 Limits The frequency tolerance for SMR applying unmodulated pulses shall be ±30 MHz. For all radar types covered by the present documents the occupied bandwidth of the signal shall be contained completely within the frequency ranges 9 000 MHz to 9 200 MHz or 9 300 MHz to 9 500 MHz in all operating modes. 4.2.1.1.3 Conformance The conformance tests are specified in clause 5.3.1.1. 4.2.1.2 Transmitter power 4.2.1.2.1 Definition In the present document the transmitter power of a pulse radar is considered to be the peak value of the transmitter pulse power during the transmission pulse (PEP). If the transmitter power varies over the azimuth, the highest PEP over at least one rotation period has to be used. The transmitter power shall be referenced with respect to the output port of the radar transmitter. 4.2.1.2.2 Limits The transmitter power shall be as specified by the manufacturer with an accuracy of at least ±1 dB. The peak power value shall not exceed 100 kW (50 dBW). 4.2.1.2.3 Conformance The conformance tests are specified in clause 5.3.1.2. SIST EN 303 213-6-1 V2.1.1:2016
ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)11 4.2.1.3 Out-of-band emissions 4.2.1.3.1 Definition An important parameter of the Out-of-Band (OoB) emissions mask of the radar is the -40 dB bandwidth. Annex 8 of Recommendation ITU-R SM.1541-5 [i.8] specifies the -40 dB bandwidth specified for various types of waveforms (e.g. pulsed radar signals). With the following assumptions which apply to most airport surface movement radars these specifications can be further simplified: • the radar is operating in the bands 9 000 MHz to 9 200 MHz or 9 300 MHz to 9 500 MHz; • the pulse power is below 100 kW; • the pulse rise time tr is greater than 0,0094·t, where t is the pulse duration. With the aforementioned assumptions the -40 dB bandwidth (B-40) for primary non-FM pulse radars can be determined as follows: rttB×=−6.740 Where: t is the pulse duration. tr is the rise time in the case of a trapezoidal pulse. NOTE: For typical values of a pulse duration of t = 50 ns and a rise time of tr = 10 ns the formula above yields a -40 dB bandwidth value of 340 MHz. For radars with multiple pulse waveforms, the B-40 bandwidth should be calculated for each individual pulse type and the maximum B-40 bandwidth obtained shall be used to establish the shape of the emission mask. For radars with a highly asymmetrical spectrum, the B-40 dB bandwidth can be offset from the frequency of maximum emission level, but the necessary bandwidth, BN and preferably the overall occupied bandwidth should be contained completely within the allocated band as stipulated in section 4 of Annex 8 of Recommendation ITU-R SM.1541-5 [i.8]. The application of this rule is illustrated in figure 1. SIST EN 303 213-6-1 V2.1.1:2016
ETSI ETSI EN 303 213-6-1 V2.1.1 (2016-05)12Figure 1: Application of the offset-rule for the Out-of-Band emission limit mask The Out-of-Band emission limits and the spurious emission limits are defined based on the -40 dB bandwidth. 4.2.1.3.2 Limits NOTE 1: In a future version of the present document more strin
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