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Evolution of RF Exposure Standards in Europe

Learn about the shift in RF exposure standards in Europe, from individual equipment testing to total workplace EMF exposure focus. Explore the challenges and solutions presented by ETSI.

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Evolution of RF Exposure Standards in Europe

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  1. GSC10_grsc3(05)37 Agenda Item: 5.2 RF Exposure & Measurement uncertainties Presented by ETSI STF 259 Alan Dearlove Team Leader

  2. RF Exposure • Within Europe there has been an evolution in the EU Directives: • From: an individual piece of equipment tested in a controlled environment • Responsibility for conformance lays with the manufacturer Gsc10_grsc3(05)37

  3. RF Exposure • To : Physical Agents Directive (part 18) 2004/04/EC • the total EMF exposure within a work place both from the equipment under the control of the employer within that workplace and EMF contributions outside that workplace (ie transmitters on adjacent buildings) • Responsibility now lays with the employer • An interesting evolution from the normal equipment Standardization perspective! Gsc10_grsc3(05)37

  4. RF Exposure • Considerable debate took place within the joint working groups between ETSI TC Safety and CENELEC TC 106X, • The outcome is a top level document (still under development ) that is focused upon the needs of the employer and whom may well be non-technical. Gsc10_grsc3(05)37

  5. RF Exposure • the draft document lays out : • Tables of equipment types which do not be need to be considered as they are below the “safe” level of 20mW • Tables of equipment types that need to be considered as they are probably over the 20mW limit • Suggestions for the employer to obtain the relevant information • References relevant harmonised standards and other useful information Gsc10_grsc3(05)37

  6. RF Exposure • The total EMF exposure approach is reasonable but provides challenges for those preparing standards to meet the Directive. • ETSI TC Safety would be interested in receiving information for any other members of GRSC who have experience with this approach to EMF exposure • Please contact Brian Copsey brian.copsey@ETSI.org Gsc10_grsc3(05)37

  7. Measurement Uncertainties • ETSI STF 259 was requested to look at measurement uncertainties and test methods for EMF site testing • Broadband isotropic probes and discreet antenna methods were evaluated by ETSI TG 27 – Radio Engineering • Assistance was sought from the UK National Physical Laboratory (NPL) on calibration and measurement uncertainties • Measurements were carried out on simulated transmitters and a radio site using both techniques • Recommendations are made in EG 202 373 currently under approval Gsc10_grsc3(05)37

  8. EMF Measurement Uncertainties • Target MU for site testing: • ± =<30 % • Broadband probes: • ± <30% • Antenna method: • > ± 10dB Gsc10_grsc3(05)37

  9. EMC Measurement Uncertainties • EMC radiated measurements test limits extended to 6 GHz by CISPR in CISPR 22 • CISPR Test Methods extended to 18 GHz • New Site Calibration methods in CISPR 16 under preparation • Radiated test method measurement uncertainty maintained at under ± 6dB • EMC for new technologies e.g. UWB devices not yet defined but under investigation by ETSI STF 259 Gsc10_grsc3(05)37

  10. Radio testing Measurement Uncertainty • Constant amplitude modulation schemes completed in EG 202 290 and under approval • New test methods required for wideband non-constant modulation schemes are under consideration to include: • CDMA • TDMA • OFDM • P-UWB, DS UWB, MC-UWB • Mi Mo • …….others Gsc10_grsc3(05)37

  11. Future • Sufficient information is now available for circulation to commence regional discussions • Task Group on Test Methods and Measurement Uncertainties in GRSC can now commence their work • A report will be produced for next GRSC meeting • Support is required for validation of test methods • Investment is being made by ETSI and ETSI members to provide test facilities • Participation of other test facilities in other regions are requested. Gsc10_grsc3(05)37

  12. Documents and Contacts • Draft ETSI EG 202 373 Report on Site EMF testing • Draft ETSI EG 202 290 Test Methods and Measurement Uncertainties for constant amplitude modulation schemes • ETSI TR 102 215 Measurement Uncertainties above 1 GHz • ETSI TS 102 321 Normalised Site Attenuation to 40 GHz • Contact alan.dearlove@etsi.org Gsc10_grsc3(05)37

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