SIST EN 303 447 V1.1.1:2017

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ERWVNHShort Range Devices (SRD) - Inductive loop systems for robotic mowers in the frequency range 0 Hz to 148,5 kHz - Harmonised standard covering the essential requirements of article 3.2 of Directive for 2014/53/EU33.060.01Radijske komunikacije na splošnoRadiocommunications in generalICS:Ta slovenski standard je istoveten z:ETSI EN 303 447 V1.1.1 (2017-09)SIST EN 303 447 V1.1.1:2017en01-november-2017SIST EN 303 447 V1.1.1:2017SLOVENSKI
STANDARD



SIST EN 303 447 V1.1.1:2017



ETSI EN 303 447 V1.1.1 (2017-09) Short Range Devices (SRD); Inductive loop systems for robotic mowers in the frequency range 0 Hz to 148,5 kHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU
HARMONISED EUROPEAN STANDARD SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 2
Reference DEN/ERM-TG28-541 Keywords harmonised standard, inductive, measurement, radio ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
Important notice The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2017. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSM® and the GSM logo are trademarks registered and owned by the GSM Association. SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 3 Contents Intellectual Property Rights . 5 Foreword . 5 Modal verbs terminology . 5 Introduction . 6 1 Scope . 7 2 References . 7 2.1 Normative references . 7 2.2 Informative references . 7 3 Definitions, symbols and abbreviations . 8 3.1 Definitions . 8 3.2 Symbols . 9 3.3 Abbreviations . 10 4 Technical requirements specifications . 10 4.1 Environmental conditions . 10 4.2 General . 10 4.2.1 Wanted performance criteria. 10 4.2.2 RMI functional mode . 10 4.2.2.1 General . 10 4.2.2.2 Operational Mode . 11 4.2.2.3 Safe Mode . 11 4.2.3 Presentation of equipment for testing purposes . 11 4.3 Transmitter conformance requirements . 11 4.3.1 Operating Frequency Range (OFR) . 11 4.3.1.1 Applicability. 11 4.3.1.2 Description . 11 4.3.1.3 Limits . 12 4.3.1.4 Conformance . 12 4.3.2 Transmitter H-field requirements . 12 4.3.2.1 Applicability. 12 4.3.2.2 Description . 12 4.3.2.3 Limits . 13 4.3.2.4 Conformance . 13 4.3.3 Transmitter spurious emissions . 13 4.3.3.1 Applicability. 13 4.3.3.2 Description . 13 4.3.3.3 Limits . 14 4.3.3.4 Conformance . 15 4.3.4 Transmitter out of band (OOB) emissions . 15 4.3.4.1 Applicability. 15 4.3.4.2 Description . 15 4.3.4.3 Limits . 15 4.3.4.4 Conformance . 15 4.4 Receiver Conformance requirements . 15 4.4.1 Introduction. 15 4.4.2 Receiver unwanted emissions . 16 4.4.3 Receiver blocking . 16 4.4.3.1 Applicability. 16 4.4.3.2 Description . 16 4.4.3.3 Limits . 16 4.4.3.4 Conformance . 16 5 Testing for compliance with technical requirements . 17 5.1 Environmental conditions for testing . 17 5.2 General conditions for testing . 17 SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 4 5.2.1 Product information . 17 5.3 Normal and extreme test conditions . 17 5.4 Artificial antenna . 17 5.5 Test sites and general arrangements for radiated measurements . 17 5.6 Measuring receiver . 18 5.7 Measurement uncertainty . 18 5.8 Interpretation of the measurement results . 18 6 Conformance methods of measurement for transmitters and receivers . 18 6.1 General . 18 6.2 Transmitter conformance methods . 19 6.2.1 OFR . 19 6.2.2 H-field . 19 6.2.3 Transmitter unwanted emissions (spurious and OOB emissions) . 20 6.3 Receiver conformance methods . 20 6.3.1 Receiver spurious emissions . 20 6.3.2 Receiver blocking . 20 Annex A (informative): Relationship between the present document and the essential requirements of Directive 2014/53/EU . 24 Annex B (normative): Test sites and procedures . 25 B.1 Set-up 1: Magnetic field measurements at a Test Garden . 25 B.2 Set-up 2: Carrier current measurements using an artificial antenna . 25 B.2.1 General . 25 B.2.2 Differential mode measurement . 26 B.2.3 Common mode measurement . 26 B.3 Radiated measurements using anechoic chamber or open area test site . 26 Annex C (normative): Artificial antenna for conducted measurements below 30 MHz . 27 Annex D (informative): Change history . 30 History . 31
SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 5 Intellectual Property Rights Essential patents 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. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. 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.6] 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.3]. 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.
National transposition dates Date of adoption of this EN: 14 August 2017 Date of latest announcement of this EN (doa): 30 November 2017 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 May 2018 Date of withdrawal of any conflicting National Standard (dow): 31 May 2019
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. SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 6 Introduction The present document covers Robotic Mowers with Inductive loop systems (RMI) using the frequency range below 148,5 kHz. An RMI system includes: • RMI docking station: charging stations for the robotic mower and the signal generator/antenna connecting point for the signals on the integral antenna and boundary wire. • Robotic Mower: receiving part inside the RMI. • Boundary Wire: user installed antenna. The present document is structured as follows: Clauses 1 through 3 provide a general description on the types of equipment covered by the present document and the definitions, symbols and abbreviations used. Clause 4 provides the technical requirements specifications, limits and conformance relative to transmitter and receiver. Clause 5 specifies the conditions for testing of the equipment and interpretation of the measurement results with the maximum measurement uncertainty values. Clause 6 specifies the required measurement methods. Annex A (informative) provides the relationship between the present document and the essential requirements of Directive 2014/53/EU [i.3]. Annex B (normative) provides necessary information on used test sites and procedures.
SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 7 1 Scope The present document specifies technical characteristics and methods of measurements for Robotic Mowers with Inductive loop systems (RMI) below 148,5 kHz. These radio equipment types are capable of operating in all or part of the frequency bands given in table 1. Table 1: Permitted range of operation Permitted range of operation Transmit 0 Hz to 148,5 kHz Receive 0 Hz to 148,5 kHz NOTE: It should be noted that the frequency range between 9 kHz and 148,5 kHz is EU wide harmonised for inductive Short Range Devices according to EC Decision 2013/752/EU [i.2].
The present document does not cover other devices using the frequency range below 148,5 kHz, e.g. ETSI EN 303 348 [i.9] (Inductive loop for hearing impaired in 0 kHz to 20 kHz), ETSI EN 303 454 [i.10] (metal sensors). The present document covers the essential requirements of article 3.2 of Directive 2014/53/EU [i.3] under the conditions identified in annex A. 2 References 2.1 Normative references References are specific, identified by date of publication and/or edition number or version number. Only the cited version applies. Referenced documents which are not found to be publicly available in the expected location might be found at https://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. [1] ETSI EN 300 330 (V2.1.1) (02-2017): "Short Range Devices (SRD); Radio equipment in the frequency range 9 kHz to 25 MHz and inductive loop systems in the frequency range 9 kHz to 30 MHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU". 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] CEPT/ERC/REC 70-03: "Relating to the use of Short Range Devices (SRD)". [i.2] EC Decision 2013/752/EU: "Commission implementing Decision of 11 December 2013 amending Decision 2006/771/EC on harmonisation of the radio spectrum for use by short-range devices and repealing Decision 2005/928/EC". SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 8 [i.3] 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.4] CEPT/ERC/REC 74-01: "Unwanted emissions in the spurious domain". [i.5] ETSI EG 203 336: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Guide for the selection of technical parameters for the production of Harmonised Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU". [i.6] 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. [i.7] EGMF Robotic Mowers Boundary Wire Standard RLM003-1.0/2014. [i.8] CENELEC EN 50636-2-107:2015: "Safety of household and similar appliances - Part 2-107: Particular requirements for robotic battery powered electrical lawnmowers". [i.9] ETSI EN 303 348: "Induction loop systems intended to assist the hearing impaired in the frequency range 10 Hz to 9 kHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU". [i.10] ETSI EN 303 454: "Short Range Devices (SRD); Metal and object detection sensors in the frequency range 1 kHz to 148,5 kHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU". [i.11] Directive 2006/42/EC or the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast). 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in ETSI EN 300 330 [1] and the following apply:
99 % OBW function: measurement function of a spectrum analyser antenna: factory defined loop(s) (e.g. integral antenna) and/or user defined loop(s) (e.g. boundary wire, guidance wire), which are used for the functional mode of the RMI NOTE: The inductive wire loops are installed dependent from the shape of the garden. A current is fed into these inductive loops to generate a magnetic field intended for guidance and/or communication with the robotic mower. boundary wire: inductive wire loop which will be defined/prepared by the user NOTE: It can be implemented as a single or multiple turn coil installed by the user in accordance with instruction from the manufacturer for the purpose of generating magnetic fields to determine the working area. factory defined loop: either integral antenna or inductive wire loop that may reach outside the docking station and needs to be completed by the user according to manufacturer specifications in size and shape guidance wire: electrical wire which is defined by manufacturer and prepared by the user integral antenna: single or multiple turn coil preinstalled inside the RMI docking station for the purpose of generating magnetic fields such as for guidance and or communication with the robotic mower SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 9 Occupied BandWidth (OBW): width of a frequency band such that, below the lower and above the upper frequency limits, the mean powers emitted are each equal to 0,5 % of the total mean power of a given emission NOTE: To clarify occupied bandwidth (OBW), see figure 1.
Figure 1: Occupied bandwidth (OBW) RMI docking station: charging stations for the robotic mower and the signal generator for the signals on the integral antenna and boundary wire NOTE: The RMI docking station can be seen as the signal generator/antenna connecting point. In addition it is the automatic battery charging facility located on or within the working area. robotic mower: mobile part of the RMI including cutting means. It is the receiving part inside the RMI Robotic Mower with Inductive loop system (RMI): system that include robotic mower, boundary wire, docking station with integral antenna, guiding wires, power supply user defined loop: single or multiple turn coil installed by the user in accordance with instruction from the manufacturer for the purpose of generating magnetic fields such as for guidance and/or communication with the robotic mower and/or to determine the working area 3.2 Symbols For the purposes of the present document, the symbols given in ETSI EN 300 330 [1] and the following apply: CA filtering capacitors of the artificial antenna fc centre frequency of the OFR fH highest frequency of the OFR fL lowest frequency of the OFR fSH higher frequency border between OOB and spurious domain fSL lower frequency border between OOB and spurious domain ICM Common mode current IDM Differential mode current LA inductive part of the artificial antenna RA low frequency resistive part of the artificial antenna RC common mode resistive part of the artificial antenna RD high frequency resistive part of the artificial antenna SIST EN 303 447 V1.1.1:2017



ETSI ETSI EN 303 447 V1.1.1 (2017-09) 10 3.3 Abbreviations For the purposes of the present document, the abbreviations given in ETSI EN 300 330 [1] and the following apply: CM Common Mode DM Differential Mode EGMF European Garden Machinery industry Federation OBW Operating BandWidth OFR Operating Frequency Range OOB Out Of Band RMI Robotic Mower with Inductive loop system 4 Technical requirements specifications 4.1 Environmental conditions The technical requirements of the present document apply under the environmental profile for operation of the equipment, which shall be declared by the manufacturer. The equipment shall comply with all the technical requirements of the present document which are identified as applicable in annex A at all times when operating within the boundary limits of the declared operational environmental profile. The conditions shall be used as descripted in clause 5.3. 4.2 General 4.2.1 Wanted performance criteria For the purpose of the receiver performance tests, the RMI shall produce an appropriate output under normal conditions as indicated below: • use as intended without degradation of performance; or • a degradation of the performance is indicated by the RMI as described in the manual. The manufacturer shall declare the performance criteria used. A robotic mower inside an RMI will only work if: • there will be a signal on the boundary wire; and • this signal is received by the robotic mower. If there is no reception of the boundary signal by the robotic mower, then the robotic mower has to switch into the safe mode (see clause 4.2.2.3). The robotic mower has to switch into this safe mode also if it is not able to receive the boundary signal based on the presence of other signals/interferer. When the robotic mower is operating, the robotic mower shall not be able to leave the working area, see clause 4.2.2.2. 4.2.2 RMI functional mode 4.2.2.1 General In this clause all general considerations for the testing of the inductive parts for the RMI in the frequency range from 0 Hz to
...

Final draft ETSI EN 303 447 V1.1.1 (2017-06)






HARMONISED EUROPEAN STANDARD
Short Range Devices (SRD);
Inductive loop systems for robotic mowers
in the frequency range 0 Hz to 148,5 kHz;
Harmonised Standard covering the essential requirements
of article 3.2 of Directive 2014/53/EU

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2 Final draft ETSI EN 303 447 V1.1.1 (2017-06)



Reference
DEN/ERM-TG28-541
Keywords
harmonised standard, inductive, measurement,
radio

ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2017.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M logo is protected for the benefit of its Members
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

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3 Final draft ETSI EN 303 447 V1.1.1 (2017-06)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definitions, symbols and abbreviations . 8
3.1 Definitions . 8
3.2 Symbols . 9
3.3 Abbreviations . 10
4 Technical requirements specifications . 10
4.1 Environmental conditions . 10
4.2 General . 10
4.2.1 Wanted performance criteria. 10
4.2.2 RMI functional mode . 10
4.2.2.1 General . 10
4.2.2.2 Operational Mode . 11
4.2.2.3 Safe Mode . 11
4.2.3 Presentation of equipment for testing purposes . 11
4.3 Transmitter conformance requirements . 11
4.3.1 Operating Frequency Range (OFR) . 11
4.3.1.1 Applicability. 11
4.3.1.2 Description . 11
4.3.1.3 Limits . 12
4.3.1.4 Conformance . 12
4.3.2 Transmitter H-field requirements . 12
4.3.2.1 Applicability. 12
4.3.2.2 Description . 12
4.3.2.3 Limits . 13
4.3.2.4 Conformance . 13
4.3.3 Transmitter spurious emis sions . 13
4.3.3.1 Applicability. 13
4.3.3.2 Description . 13
4.3.3.3 Limits . 14
4.3.3.4 Conformance . 15
4.3.4 Transmitter out of band (OOB) emissions . 15
4.3.4.1 Applicability. 15
4.3.4.2 Description . 15
4.3.4.3 Limits . 15
4.3.4.4 Conformance . 15
4.4 Receiver Conformance requirements . 15
4.4.1 Introduction. 15
4.4.2 Receiver unwanted emissions . 16
4.4.3 Receiver blocking . 16
4.4.3.1 Applicability. 16
4.4.3.2 Description . 16
4.4.3.3 Limits . 16
4.4.3.4 Conformance . 16
5 Testing for compliance with technical requirements . 17
5.1 Environmental conditions for testing . 17
5.2 General conditions for testing . 17
ETSI

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4 Final draft ETSI EN 303 447 V1.1.1 (2017-06)
5.2.1 Product information . 17
5.3 Normal and extreme test conditions . 17
5.4 Artificial antenna . 17
5.5 Test sites and general arrangements for radiated measurements . 17
5.6 Measuring receiver . 18
5.7 Measurement uncertainty . 18
5.8 Interpretation of the measurement results . 18
6 Conformance methods of measurement for transmitters and receivers . 18
6.1 General . 18
6.2 Transmitter conformance methods . 19
6.2.1 OFR . 19
6.2.2 H-field . 19
6.2.3 Transmitter unwanted emissions (spurious and OOB emissions) . 20
6.3 Receiver conformance methods . 20
6.3.1 Receiver spurious emissions . 20
6.3.2 Receiver blocking . 20
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 24
Annex B (normative): Test sites and procedures . 25
B.1 Set-up 1: Magnetic field measurements at a Test Garden . 25
B.2 Set-up 2: Carrier current measurements using an artificial antenna . 25
B.2.1 General . 25
B.2.2 Differential mode measurement . 26
B.2.3 Common mode measurement . 26
B.3 Radiated measurements using anechoic chamber or open area test site . 26
Annex C (normative): Artificial antenna for conducted measurements below 30 MHz . 27
Annex D (informative): Change history . 30
History . 31


ETSI

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5 Final draft ETSI EN 303 447 V1.1.1 (2017-06)
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 final draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM), and is now submitted for the Vote phase of the
ETSI standards EN Approval Procedure.
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.6] 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.3].
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.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

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.
Introduction
The present document covers Robotic Mowers with Inductive loop systems (RMI) using the frequency range below
148,5 kHz. An RMI system includes:
• RMI docking station: charging stations for the robotic mower and the signal generator/antenna connecting
point for the signals on the integral antenna and boundary wire.
• Robotic Mower: receiving part inside the RMI.
• Boundary Wire: user installed antenna.
ETSI

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6 Final draft ETSI EN 303 447 V1.1.1 (2017-06)
The present document is structured as follows:
Clauses 1 through 3 provide a general description on the types of equipment covered by the present document and the
definitions, symbols and abbreviations used.
Clause 4 provides the technical requirements specifications, limits and conformance relative to transmitter and receiver.
Clause 5 specifies the conditions for testing of the equipment and interpretation of the measurement results with the
maximum measurement uncertainty values.
Clause 6 specifies the required measurement methods.
Annex A (informative) provides the relationship between the present document and the essential requirements of
Directive 2014/53/EU [i.3].
Annex B (normative) provides necessary information on used test sites and procedures.

ETSI

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7 Final draft ETSI EN 303 447 V1.1.1 (2017-06)
1 Scope
The present document specifies technical characteristics and methods of measurements for Robotic Mowers with
Inductive loop systems (RMI) below 148,5 kHz.
These radio equipment types are capable of operating in all or part of the frequency bands given in table 1.
Table 1: Permitted range of operation
Permitted range of operation
Transmit 0 Hz to 148,5 kHz
Receive 0 Hz to 148,5 kHz
NOTE: It should be noted that the frequency range between 9 kHz and
148,5 kHz is EU wide harmonised for inductive Short Range
Devices according to EC Decision 2013/752/EU [i.2].

The present document does not cover other devices using the frequency range below 148,5 kHz, e.g. ETSI
EN 303 348 [i.9] (Inductive loop for hearing impaired in 0 kHz to 20 kHz), ETSI EN 303 454 [i.10] (metal sensors).
The present document covers the essential requirements of article 3.2 of Directive 2014/53/EU [i.3] under the
conditions identified in annex A.
2 References
2.1 Normative references
References are specific, identified by date of publication and/or edition number or version number. Only the cited
version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://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.
[1] ETSI EN 300 330 (V2.1.1) (02-2017): "Short Range Devices (SRD); Radio equipment in the
frequency range 9 kHz to 25 MHz and inductive loop systems in the frequency range 9 kHz to
30 MHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive
2014/53/EU".
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] CEPT/ERC/REC 70-03: "Relating to the use of Short Range Devices (SRD)".
[i.2] EC Decision 2013/752/EU: "Commission implementing Decision of 11 December 2013 amending
Decision 2006/771/EC on harmonisation of the radio spectrum for use by short-range devices and
repealing Decision 2005/928/EC".
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8 Final draft ETSI EN 303 447 V1.1.1 (2017-06)
[i.3] 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.4] CEPT/ERC/REC 74-01: "Unwanted emissions in the spurious domain".
[i.5] ETSI EG 203 336: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Guide for
the selection of technical parameters for the production of Harmonised Standards covering
article 3.1(b) and article 3.2 of Directive 2014/53/EU".
[i.6] 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.
[i.7] EGMF Robotic Mowers Boundary Wire Standard RLM003-1.0/2014.
[i.8] CENELEC EN 50636-2-107:2015: "Safety of household and similar appliances - Part 2-107:
Particular requirements for robotic battery powered electrical lawnmowers".
[i.9] ETSI EN 303 348: "Induction loop systems intended to assist the hearing impaired in the
frequency range 10 Hz to 9 kHz; Harmonised Standard covering the essential requirements of
article 3.2 of Directive 2014/53/EU".
[i.10] ETSI EN 303 454: "Short Range Devices (SRD); Metal and object detection sensors in the
frequency range 1 kHz to 148,5 kHz; Harmonised Standard covering the essential requirements of
article 3.2 of Directive 2014/53/EU".
[i.11] Directive 2006/42/EC or the European Parliament and of the Council of 17 May 2006 on
machinery, and amending Directive 95/16/EC (recast).
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in ETSI EN 300 330 [1] and the following
apply:
antenna: factory defined loop(s) (e.g. integral antenna) and/or user defined loop(s) (e.g. boundary wire, guidance wire),
which are used for the functional mode of the RMI
NOTE: The inductive wire loops are installed dependent from the shape of the garden. A current is fed into these
inductive loops to generate a magnetic field intended for guidance and/or communication with the robotic
mower.
boundary wire: inductive wire loop which will be defined/prepared by the user
NOTE: It can be implemented as a single or multiple turn coil installed by the user in accordance with instruction
from the manufacturer for the purpose of generating magnetic fields to determine the working area.
factory defined loop: either integral antenna or inductive wire loop that may reach outside the docking station and
needs to be completed by the user according to manufacturer specifications in size and shape
guidance wire: electrical wire which is defined by manufacturer and prepared by the user
integral antenna: single or multiple turn coil preinstalled inside the RMI docking station for the purpose of generating
magnetic fields such as for guidance and or communication with the robotic mower
Occupied bandwidth (OBW): width of a frequency band such that, below the lower and above the upper frequency
limits, the mean powers emitted are each equal to 0,5 % of the total mean power of a given emission
NOTE: To clarify occupied bandwidth (OBW), see figure 1.
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9 Final draft ETSI EN 303 447 V1.1.1 (2017-06)

Figure 1: Occupied bandwidth (OBW)
99 % OBW function: measurement function of a spectrum analyser
RMI docking station: charging stations for the robotic mower and the signal generator for the signals on the integral
antenna and boundary wire
NOTE: The RMI docking station can be seen as the signal generator/antenna connecting point. In addition it is
the automatic battery charging facility located on or within the working area.
robotic mower: mobile part of the RMI including cutting means. It is the receiving part inside the RMI
Robotic Mower with Inductive loop system (RMI): system that include robotic mower, boundary wire, docking
station with integral antenna, guiding wires, power supply
user defined loop: single or multiple turn coil installed by the user in accordance with instruction from the
manufacturer for the purpose of generating magnetic fields such as for guidance and/or communication with the robotic
mower and/or to determine the working area
3.2 Symbols
For the purposes of the present document, the symbols given in ETSI EN 300 330 [1] and the following apply:
C filtering capacitors of the artificial antenna
A
f centre frequency of the OFR
c
f highest frequency of the OFR
H
f lowest frequency of the OFR
L
f higher frequency border between OOB and spurious domain
SH
f lower frequency border between OOB and spurious domain
SL
I Common mode current
CM
I Differential mode current
DM
L inductive part of the artificial antenna
A
R low frequency resistive part of the artificial antenna
A
R common mode resistive part of the artificial antenna
C
high frequency resistive part of the artificial antenna
R
D
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10 Final draft ETSI EN 303 447 V1.1.1 (2017-06)
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI EN 300 330 [1] and the following apply:
CM Common Mode
DM Differential Mode
EGMF European Garden Machinery industry Federation
OBW Operating BandWidth
OFR Operating Frequency Range
OOB Out Of Band
RMI Robotic Mower with Inductive loop system
4 Technical requirements specifications
4.1 Environmental conditions
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be declared by the manufacturer. The equipment shall comply with all the technical
requirements of the present document which are identified as applicable in annex A at all times when operating within
the boundary limits of the declared operational environmental profile. The conditions shall be used as descripted in
clause 5.3.
4.2 General
4.2.1 Wanted performance criteria
For the purpose of the receiver performance tests, the RMI shall produce an appropriate output under normal conditions
as indicated below:
• use as intended without degradation of performance; or
• a degradation of the performance is indicated by the RMI as described in the manual.
The manufacturer shall declare the performance criteria used.
A robotic mower inside an RMI will only work if:
• there will be a signal on the boundary wire; and
• this signal is received by the robotic mower.
If there is no reception of the boundary signal by the robotic mower, then the robotic mower has to switch into the safe
mode (see clause 4.2.2.3). The robotic mower has to switch into this safe mode also if it is not able to receive the
boundary signal based on the presence of other signals/interferer.
When the robotic mower is operating, the robotic mower shall not be able to leave the working area, see clause 4.2.2.2.
4.2.2 RMI functional mode
4.2.2.1 General
In this clause all general considerations for the testing of the inductive parts for the RMI in the frequency range from
0 Hz to 148,5 Hz are given.
Typical functional modes being part of an RMI are explained in the following clauses.
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11 Final draft ETSI EN 303 447 V1.1.1 (2017-06)
An RMI can have diffe
...

Draft ETSI EN 303 447 V1.1.0 (2016-12)






HARMONISED EUROPEAN STANDARD
Short Range Devices (SRD);
Inductive loop systems for robotic mowers
in the frequency range 0 Hz to 148,5 kHz;
Harmonised Standard covering the essential requirements
of article 3.2 of Directive 2014/53/EU

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2 Draft ETSI EN 303 447 V1.1.0 (2016-12)



Reference
DEN/ERM-TG28-541
Keywords
harmonised standard, inductive, measurement,
radio

ETSI
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ETSI

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3 Draft ETSI EN 303 447 V1.1.0 (2016-12)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
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 . 10
3.3 Abbreviations . 10
4 Technical requirements specifications . 11
4.1 Environmental conditions . 11
4.2 General . 11
4.2.1 Wanted performance criteria. 11
4.2.2 RMI functional mode . 11
4.2.2.1 General . 11
4.2.2.2 Operational Mode . 11
4.2.2.3 Safe Mode . 11
4.2.3 Presentation of equipment for testing purposes . 12
4.3 Transmitter conformance requirements . 12
4.3.1 Operating Frequency Range (OFR) . 12
4.3.1.1 Applicability. 12
4.3.1.2 Description . 12
4.3.1.3 Limits . 12
4.3.1.4 Conformance . 12
4.3.2 Transmitter H-field requirements . 13
4.3.2.1 Applicability. 13
4.3.2.2 Description . 13
4.3.2.3 Limits . 13
4.3.2.4 Conformance . 13
4.3.3 Transmitter unwanted emissions . 13
4.3.3.1 Applicability. 13
4.3.3.2 Description . 13
4.3.3.3 Limits . 14
4.3.3.4 Conformance . 14
4.4 Receiver Conformance requirements . 14
4.4.1 Introduction. 14
4.4.2 Receiver unwanted emissions . 15
4.4.3 Receiver blocking . 15
4.4.3.1 Applicability. 15
4.4.3.2 Description . 15
4.4.3.3 Limits . 15
4.4.3.4 Conformance . 16
5 Testing for compliance with technical requirements . 16
5.1 Environmental conditions for testing . 16
5.2 General conditions for testing . 16
5.2.1 Product information . 16
5.3 Normal and extreme test conditions . 16
5.4 Artificial antenna . 16
5.5 Test sites and general arrangements for radiated measurements . 16
5.6 Measuring receiver . 17
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4 Draft ETSI EN 303 447 V1.1.0 (2016-12)
5.7 Measurement uncertainty . 17
5.8 Interpretation of the measurement results . 17
6 Conformance methods of measurement for transmitters and receivers . 17
6.1 General . 17
6.2 Transmitter conformance methods . 18
6.2.1 OFR . 18
6.2.2 H-field . 18
6.2.3 Transmitter unwanted emissions . 19
6.3 Receiver conformance methods . 19
6.3.1 Receiver spurious emissions . 19
6.3.2 Receiver blocking . 19
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 21
Annex B (normative): Test sites and procedures . 22
B.1 Set-up 1: Magnetic field measurements at a Test Garden . 22
B.2 Set-up 2: Carrier current measurements using an artificial antenna . 22
B.2.1 General . 22
B.2.2 Differential mode measurement . 23
B.2.3 Common mode measurement . 23
B.3 Radiated measurements using anechoic chamber or open area test site . 23
Annex C (normative): Artificial antenna for conducted measurements below 30 MHz . 24
Annex D (informative): Change History . 26
History . 27


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5 Draft ETSI EN 303 447 V1.1.0 (2016-12)
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 draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote
phase of the ETSI standards EN Approval Procedure.
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.6] 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.3].
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.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

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.
Introduction
The present document covers Robotic Mowers with inductive loop systems (RMI) using the frequency range below
148,5 kHz. An RMI system includes:
• RMI docking station: charging stations for the robotic mower and the signal generator/antenna connecting
point for the signals on the integral antenna and boundary wire.
• Robotic Mower: receiving part inside the RMI.
• Boundary Wire: user installed antenna.
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6 Draft ETSI EN 303 447 V1.1.0 (2016-12)
• Integral antenna: integral inductive antenna integrated inside the RMI docking station.
The present document is structured as follows:
Clauses 1 through 3 provide a general description on the types of equipment covered by the present document and the
definitions, symbols and abbreviations used.
Clause 4 provides the technical requirements specifications, limits and conformance relative to transmitter and receiver.
Clause 5 specifies the conditions for testing of the equipment and interpretation of the measurement results with the
maximum measurement uncertainty values.
Clause 6 specifies the required measurement methods.
Annex A (informative) provides the relationship between the present document and the essential requirements of
Directive 2014/53/EU [i.3].
Annex B (normative) provides necessary information on used test sites and procedures.

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7 Draft ETSI EN 303 447 V1.1.0 (2016-12)
1 Scope
The present document specifies technical characteristics and methods of measurements for Robotic Mowers with
inductive loop systems (RMI) below 148,5 kHz.
The present document covers all Robotic Mowers that use guidance Inductive loop wire systems (RMI) using the
frequency range below 148,5 kHz.
An RMI system includes:
• RMI docking station: charging stations for the robotic mower and the signal generator/antenna connecting
point for the signals on the integral antenna and boundary wire.
• Robotic Mower: receiving part inside the RMI.
• Boundary Wire: user installed antenna.
• Integral antenna: integral inductive antenna integrated inside the RMI docking station.
The present document does not cover other devices using the frequency range below 148,5 kHz, e.g. ETSI EN 303 348
(Inductive loop for hearing impaired in 0 kHz to 20 kHz) [i.9], ETSI EN 303 454 (metal sensors) [i.10].
These radio equipment types are capable of operating in all or part of the frequency bands given in table 1.
Table 1: Permitted range of operation
Permitted range of operation
Transmit 0 Hz to 148,5 kHz
Receive 0 Hz to 148,5 kHz
NOTE: It should be noted that the frequency range between 9 kHz and
148,5 kHz is EU wide harmonised for inductive Short Range
Devices according to EC Decision 2013/752/EU [i.2].

The present document covers the essential requirements of article 3.2 of Directive 2014/53/EU [i.3] under the
conditions identified in annex A.
2 References
2.1 Normative references
References are specific, identified by date of publication and/or edition number or version number. Only the cited
version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://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.
[1] ETSI EN 300 330 (V2.1.1) (11-2016): "Short Range Devices (SRD); Radio equipment in the
frequency range 9 kHz to 25 MHz and inductive loop systems in the frequency range 9 kHz to
30 MHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive
2014/53/EU".
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8 Draft ETSI EN 303 447 V1.1.0 (2016-12)
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] CEPT/ERC Recommendation 70-03: "Relating to the use of Short Range Devices (SRD)".
[i.2] EC Decision 2013/752/EU: "Commission implementing Decision of 11 December 2013 amending
Decision 2006/771/EC on harmonisation of the radio spectrum for use by short-range devices and
repealing Decision 2005/928/EC".
[i.3] 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.4] CEPT/ERC/REC 74-01: "Unwanted emissions in the spurious domain".
[i.5] ETSI EG 203 336: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Guide for
the selection of technical parameters for the production of Harmonised Standards covering
article 3.1(b) and article 3.2 of Directive 2014/53/EU".
[i.6] 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.
[i.7] EGMF Robotic Mowers Boundary Wire Standard RLM003-1.0/2014.
[i.8] CENELEC EN 50636-2-107:2015: "Safety of household and similar appliances - Part 2-107:
Particular requirements for robotic battery powered electrical lawnmowers".
[i.9] ETSI EN 303 348: "Induction loop systems intended to assist the hearing impaired in the
frequency range 10 Hz to 9 kHz; Harmonised Standard covering the essential requirements of
article 3.2 of Directive 2014/53/EU".
[i.10] ETSI EN 303 454: "Metal and object detection sensors in the frequency range 1 kHz to 148,5 kHz;
Harmonised standard covering the essential requirements of article 3.2 of the Directive
2014/53/EU".
[i.11] Directive 2006/42/EC or the European Parliament and of the Council of 17 May 2006 on
machinery, and amending Directive 95/16/EC (recast).
[i.12] ITU Radio Regulations.
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in ETSI EN 300 330 [1] and the following
apply:
antenna: all integral, user or factory defined antennas which are specified by manufacturer to run the functional mode
of the RMI
NOTE: See details in clause 4.2.2.
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9 Draft ETSI EN 303 447 V1.1.0 (2016-12)
boundary wire: inductive wire loop which will be defined/prepared by the user
NOTE: It can be implemented as a single or multiple turn coil installed by the user in accordance with instruction
from the manufacturer for the purpose of generating magnetic fields to determine the working area (see
figure 3).
guidance wire: electrical cable which is defined by manufacturer
NOTE: The wire is dependent from the shape of the garden including perimeter delimiter and all electrical
conductors external to the machine through which current is fed to generate a magnetic field intended for
guidance and/or communication with the machine.
integral antenna or factory defined loop: single or multiple turn coil preinstalled or specified by the manufacturer for
the purpose of generating magnetic fields such as for guidance and or communication with the machine
NOTE: The integral inductive antenna is integrated inside the RMI docking station.

Figure 1: RMI docking station with examples of integral antenna loops
operating frequency range: width of a frequency band such that, below the lower and above the upper frequency
limits, the mean powers emitted are each equal to 0,5 % of the total mean power of a given emission
power envelope: power supplied to the antenna by a transmitter during one radio frequency cycle at the crest of the
modulation envelope taken under normal operating conditions
NOTE: As RR 1.157 [i.12].

Figure 2: Operating Frequency Range
99 % OBW function: measurement function of a spectrum analyser
RMI docking station: charging stations for the robotic mower and the signal generator for the signals on the integral
antenna and boundary wire
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10 Draft ETSI EN 303 447 V1.1.0 (2016-12)
NOTE: The RMI docking station can be seen as the signal generator/antenna connecting point. In addition it is
the automatic battery charging facility located on or within the working area.
robotic mower: receiving part inside the RMI
Robotic Mower with Inductive loop system (RMI): system that include robot mower, boundary wire, docking station
with integral antenna, guiding wires, power supply (solar panels, windmills,230 V 50Hz (/110V60Hz) mains connected,
batteries)
user defined loop: single or multiple turn coil installed by the user in accordance with instruction from the
manufacturer for the purpose of generating magnetic fields such as for guidance and/or communication with the
machine and/or determine the working area

Figure 3: Example of an RMI system including an RMI docking station (grey box)
and possible boundary wires (dotted and dashed lines)
3.2 Symbols
For the purposes of the present document, the symbols given in ETSI EN 300 330 [1] and the following apply:
f centre frequency of the OFR
c
f highest frequency of the OFR
H
f lowest frequency of the OFR
L
ICM Common mode current
I Differential mode current
DM
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI EN 300 330 [1] and the following apply:
CM Common Mode
DM Differential Mode
EGMF European Garden Machinery industry Federation
OBW Operating BandWidth
OFR Operating Frequency Range
RMI Robotic Mower with Inductive loop system
RR Radio Regulations
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11 Draft ETSI EN 303 447 V1.1.0 (2016-12)
4 Technical requirements specifications
4.1 Environmental conditions
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be declared by the manufacturer. The equipment shall comply with all the technical
requirements of the present document which are identified as applicable in annex A at all times when operating within
the boundary limits of the declared operational environmental profile. The conditions shall be used as descripted in
clause 5.3.
4.2 General
4.2.1 Wanted performance criteria
A mower inside an RMI will only work if:
• there will be a signal on the boundary wire; and
• this signal could be received by the mower.
If there will be no reception of the boundary signal at the mower, then the mower has to switch into the safe mode (see
clause 4.2.2.3). The mower has to switch into this safe mode also if it is not able to receive the boundary signal based on
the presence of other signals/interferer.
4.2.2 RMI functional mode
4.2.2.1 General
In this clause all general considerations for the testing of the inductive parts for the RMI in the frequency range from
0 Hz to 148,5 Hz are given.
Typical functional mode being part of an RMI are explained in the following clauses.
An RMI could have different user defined loops and factory defined loops, see figures 1 and 3. The requirements test
shall be performed for each loop separately.
If additional mode/antenna/user defined loops are implemented by the manufacturer, then this mode shall be declared
for the preparation of the tests.
The test set-up of the different modes shall be performed as described in clause 6.1 and annex B.
4.2.2.2 Operational Mode
Operational mode is the working mode of the RMI. During this mode the mowers is cutting the grass inside the working
area and shall not be possible for the machine to cross the boundary by a distance of one full length of the machine, see
CENELEC EN 50636-2-107:2015 [i.8], clause 22.104.2.
The generated signal will be transmitted on the declared user defined loops and integral
...