The use of the EN 55011 is widespread. The standard is titled Industrial, scientific and medical equipment – Radio-frequency disturbance characteristics – Limits and methods of measurement. It is a harmonized standard for the 2014/30/EU Directive on Electromagnetic Compatibility. It recently was updated with the addition of an Amendment 1 for the 2016 Edition. This update replaces the previous 2016 Edition. The changes to the document were generated by changes in the source standard. Since it is an adoption of the CISPR 11, the new EN 55011 now includes the CISPR 11 Amendment 1.
The standard is part of the harmonized standards series for the EMC Directive, 2014/30/EU. However, the new edition is not on the list yet. This means that it has not been officially adopted in the Official Journal.
I note that this approval may be pending due to issues with the Annex ZZ. The Annex references the clauses of the previous (now withdrawn) EMC Directive 2004/108/EC. However, the CENELEC information on the document states that while the previous 2016 Edition related to both Directives, the new 2016 Edition with the 2017 Amendment is for the 2014/30/EU only. I suspect this may have resulted in some cases of the various editions having different status levels in different nations. I note that at the present time, the BS EN 55011 2016 Edition is considered withdrawn without replacement. However, the new BS EN 55011 2016 + Amendment 1 2017 is current.
If you use this standard, please note that several national deviations are presented in the cover sheet material. Some frequency ranges are different in Germany and in the United Kingdom.
You may also be interested in the changes from the previous 2016 Edition. Updates have to do with the the fully-anechoic room (FAR) for measurements of the disturbance field strength. (A FAR is a shielded enclosure where the internal surfaces are lined with RF energy-absorbing material.) The new FAR requirements are for disturbance field strength in the range of 30 MHz to 1 GHz. This FAR can be used if validated according to CISPR 16-1-4.
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