CEI EN 50498

BILINGUAL

Scope and objective

This European Standard specifies limits and methods of
measurement for disturbance emissions and immunity characteristics
of aftermarket equipment (ESAs) which are referenced by Automotive
EMC Directive 2004/104/EC, Annex I, 3.2.9, and which are not
related to immunity-related functions of vehicles as defined in
Automotive EMC Directive 2004/104/EC, Annex I, 2.1.12.

Any equipment (or part of an ESA) which has a primary function
of radio transmission and/or reception according to the ITU Radio
Regulations are excluded from the scope of this publication.

This European Standard covers the frequency range 9 kHz to 400
GHz. To date, it specifies limits and methods of measurement for
conducted and radiated disturbances from ESAs in the frequency
range 30 MHz to 1 GHz and immunity requirements for conducted
transients. The assessment of an ESA needs to be performed only in
the frequency ranges where limits are defined.

The emission requirements have been selected so as to ensure
that disturbances generated by ESAs operating normally do not
exceed a level that could prevent the vehicle or apparatus external
to the vehicle from operating as intended. Fault conditions are not
taken into account. Not all disturbance phenomena have been
included for testing purposes in this standard but only those
considered as relevant for the equipment covered by this
standard.

As ESAs covered by this standard are not related to
immunity-related function, only the following electromagnetic
disturbance phenomena are evaluated:

– broadband and narrowband radiated electromagnetic
disturbances;

– conducted transient disturbances;

– conducted transient immunity.

Accessories that are not connected directly to the vehicle
harness, but only via a special interface are normally excluded
from vehicular EMC requirements.