scope:

The present document covers the minimum characteristics considered necessary in order to make the best use of the available frequencies. It does not necessarily include all the characteristics that may be required by a user, nor does it necessarily represent the optimum performance achievable.

Cordless audio devices covered within the present document are considered, by definition, Short Range Devices (SRD), the power limits for different frequency bands can be found in the current version of CEPT/ERC/REC 70-03, annex 13 (or national regulations).

Stereo equipment can be designed for required channel bandwidths of 200 kHz or less, however consumer wideband (multi channel) audio equipment and stereo equipment using e.g. Zenith-GE pilot tone systems or digital modulation may need wider bandwidths as defined in the present document.

The present document applies to cordless audio consumer radio microphones, in ear monitoring equipment using either 300 kHz bandwidth analogue modulation or:

• 300 kHz, 600 kHz, 1 200 kHz digital FDMA modulation; and

• Band II LPD (low power devices) using up to 200 kHz bandwidth and analogue modulation.

The frequency bands for this equipment may differ from country to country as specified in their national regulations. All equipment is intended to be used with integral antennas.

Consumer audio equipment intended for audio and voice operating below 50 MHz and using narrow band modulation are considered and tested according to EN 300 220.

Electromagnetic Compatibility (EMC) requirements are covered by EN 301 489-9.

The types of equipment covered by the present document are as follows:

- cordless headphones;

- cordless loudspeakers;

- consumer radio microphones;

- in-ear monitoring;

- in-vehicle cordless;

- personal cordless;

- broadband multi channel audio systems;

- Band II LPD.

Annex A provides normative specifications concerning radiated measurements.

Annex B provides the test configuration for the measurement of necessary bandwidth.

Annex C provides informative parameters on the receiver part, which are intended to give guidance to manufacturers.

Annex D provides information on the derivation of radiated emissions limits for Band II LPD.

Annex E provides a justification for field strength limits for Band II LPD.

Annex F provides details of a typical test layout for Band II LPD.

Annex G contains the Bibliography.