Electromagnetic Compatibilty

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!

Sources:
[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 Database

This entry is a begin to collect different contribtion with possible practical value to EMC interesetd amateurs in Region 1.

The QRM-Estimator (download: here) is a small tool to calculate the field strength of a disturbace in a certain distance with respect to the measurement limits spelled out in ECC Recomendation 05(04). It can be used to estimate, if a disturbance from a wire line bould telecommunikation application causes an interferance at the amateurs receiving location, with respect to the limit. A version for your Andoid tablet or phone can be downloaded by using the google play store and seach for "QRMcalc", or can be downloaded here.

Another program called RxInterferanceLevel (download: here) estimates the signal level to be expected in your receiver near an disturbance source operating on the power line.

New standard for In-house PLC above 30 MHz

CENELEC Committee TC210 WG 11 has completed the standard for in-house PLC devices which operate above 30 MHz. The first standard in the family - the now in-force EN 50561-1 - covers the frequency range up to 30 MHz and was debated heavily amongst radio users. It does safeguard the broadcast, amateur and aeronautical frequencies, but spoils the rest of the spectrum for local use. The reason for that is the fairly high emission limit of 110 dBµV.

The now positive voted EN 50561-3 covers measurement setup and limits for frequencies above 30 MHz, while devices which also operate on the low band (which is the usual case) still need to comply with EN 50561-1 or show compliance via an alternative route. A fairly low emission limit value between 85 and 80 dBµV (depending on frequency) was set in EN 50561-3, and additionally the amateur bands (50 - 52 MHz and 70.0 - 70.5 MHz) were notched down to 55 dBµV. This coming standard will again help to stabilize the situation of PLC coexistence and at least to keep the amateur spectrum clean.