DocID025465 Rev 1

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AN4387

An overview of ETSI regulations

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An overview of ETSI regulations

The use of radio equipment in most European countries is regulated through the R&TTE

directive. The European Telecommunications Standard Institute (ETSI) is a standardization

body that issues the standards for testing and type approval of transmitters and receivers.

EN 300 328 covers the 2.4 GHz band and specifies in detail the requirements and test

methods to be used for license-free operated radio equipment under class 3a, equipment

using wideband modulation techniques (DSSS or FHSS).

The standard defines two categories of equipment based on modulation type:

 Frequency Hopping Spread Spectrum (FHSS)

 Other types of wide band modulation (e.g. DSSS, OFDM, etc.)

It also covers both adaptive and non-adaptive equipment.

Adaptive equipment uses an automatic mechanism which allows the equipment to adapt

automatically to its environment by identifying frequencies that are being used by other

equipment.

ETSI classifies Bluetooth LE as adaptive equipment using DSSS modulation.