Electromagnetic Compatibilty

IARU argues for protection from WPT spurious emissions

IARU was again represented at the meeting last week in Ankara, Turkey, where committee SE24 (Short Range Devices) met to undertake further work on the Work Item concerning Wireless Power Transmission. SE24 is considering both WPT for electric vehicles and also generic WPT applications.

IARU has made extensive input on the potential impact on radio communications from spurious emissions from WPT devices and much of this is captured in CEPT ECC Report 289, published earlier this year ( https://www.ecodocdb.dk/document/8214 ). At the Ankara meeting further input was made by IARU and other interested parties and there will be a meeting of SE24 dedicated to WPT issues in early July.

Also at Ankara IARU attended the SRD Maintenance Group meeting ( SRD/MG ) where it was noted that further work was needed in SE24 before spurious emission limits for WPT devices could be addressed in a regulatory sense.

IARU was represented in Ankara by Don Beattie, Region 1 President, who is leading the IARU work on WPT.

Noise Reporter v1.0

Who wishes to help sustainably stop the decay of the electromagnetic environment, must first consider how the level of electromagnetic interference in relation to the expected level is. This is relatively simple using NoiseReporter, which is based on ITU-R P.372-12 as a basis for intended radio reception.

Essential Requirements as laid out in the EU directive for the immunity of equipment [1] need a measurable reference. Among the ITU Member States for that purpose the ITU-R P.372-12 is known to quantify man made noise, which is to be expected in a given environment. [2]. In particular, the immunity tests in harmonized standards presume with their severities a given electromagnetic environment, which refer to the ITU-R P.372-12 as reference.

If you wish to qualify your environment, try NoiseReporter and download here.

Note: This is Version 1.0 and first publication. It is likely, that there are bugs in the software. If you find a bug, please report with detailed description to the author. Tnx!

[1] Quotation from EMC-Directive 2014/30/EU: "Equipment shall be so designed and manufactured, having regard to the state of the art, as to ensure that: ....(b) it has a level of immunity to the electromagnetic disturbance to be expected in its intended use which allows it to operate without unacceptable degradation of its intended use.

[2] Recommendation ITU-R P.372-12 (07/2015) Radio noise

Update of ICNIRPcalc - now Version 1.5

ICNIRPcalc is arround for a while. You can calculate the distance persons need to stay clear from a given antenna, so European exposure limits are not exceeded. The new Version has German, English, French and Swedish language capabilities now and the  antenna database was enlarged. Download here.

VDSL Interference - a guidance leaflet

The number of instances of interference from VDSL has increased over the last couple of years in the UK. To help amateurs to detect interference from VDSL the RSGB has drawn up a leaflet, the 15th in a series of EMC leaflets which the RSGB EMCC has produced.

The leaflet has been uploaded to this site by G4JKS in response to an action agreed at the first EMC Committee meeting at the Interim Meeting or Permanent Committees in Vienna on 16th to 17th April 2016. Click here to download the leaflet

EMC Committee - Terms of Reference

EMC Committee (C7) Terms of Reference

EMCC (C7) is a specialist technical body of IARU and deals with Electromagnetic Compatibility issues related specifically to the EU’s Electromagnetic Compatibility (EMC) and Radio Equipment Directives in CISPR, IEC, ICNIRP, CENELEC and ETSI and other Region 1 entities of a similar nature, with the following Terms of Reference and objectives.

The EMCC shall:

•              Monitor and research developments in relevant forums addressing EMC, which potentially impact the Amateur Service and Amateur-Satellite Service (the Amateur Services);

•              Advise the EC on the workings of such forums affecting any matter which might impact on the interests of the Amateur Services and process material and undertake actions delegated to it by the EC in respect of these forums;

•              Prepare submissions on EMC, detailing the views and concerns and objectives of the Amateur Services in relation to emerging technologies;

•              Wherever feasible, influence EMC related standards to the benefit of the Amateur Services;

•              Bring potential interference threats to the Amateur Services, from emerging technologies, to the attention of the SRLC and PRC, to influence relevant legislative changes and implementation, internationally and nationally; and

•              Work in close and regular contact with specialists in MS to assist in the development of IARU EMC strategy;

•              Provide advice on EMC concerns to IARU MS and coordinate actions in core areas in support of IARU Region 1 or IARU global EMC strategies.

•              Keep a watching brief on all issues relating to EMF as they affect the Amateur Services

The EMCC shall work with other permanent Committees (PRC, SRLC, C4 and C5) to identify potential threats to the Amateur Services and agree with the other relevant permanent bodies, strategies and measures to ensure that these threats are managed in an appropriate way.