# Commission Regulation (EC) No 631/2009 of 22 July 2009 laying down detailed rules for the implementation of Annex I to Regulation (EC) No 78/2009 of the European Parliament and of the Council on the type-approval of motor vehicles with regard to the protection of pedestrians and other vulnerable road users, amending Directive 2007/46/EC and repealing Directives 2003/102/EC and 2005/66/EC, Division 2.5: System requirements

Extent: E+W+S+N.I.

The data system shall have a resolution of 12 bits (± 0,05 %) or more and an accuracy of 2 LSB (± 0,1 %). Anti-aliasing filters shall be of order 4 or higher and the relevant data range fmax shall be 0 Hz to 30 Hz.
For fourth order filters the pass-band frequency fo (from 0 Hz to frequency fo) shall be greater than 2,37 × fmax if phase errors are subsequently adjusted in digital data processing, and greater than 5 × fmax otherwise. For fourth order filters the data sampling frequency fs shall be greater than 13,4 × fo.

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Source: https://www.legislation.gov.uk/eur/2009/631/annex/part/III/division/appendix+ii/division/2/division/2.5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-631/annex/part-III/division-appendix+ii/division-2/division-2.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.