scope:

This I-ETS 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.

This I-ETS applies to equipment with modulation systems operating on radio frequencies between 25 MHz and 3 GHz. Although analogue Frequency Modulation (FM) is at present used for the majority of wireless microphones, this specification does not preclude any other constant carrier modulation technique, e.g. Gaussian Filtered Minimum Shift Keying (GMSK) or Generalised Tamed Frequency Modulation (GTFM), provided that the modulation spectrum lies within a standardized spectral mask.

This I-ETS does not apply to wireless microphones employing Time Division Multiple Access (TDMA), frequency hopping and spread spectrum or similar forms of modulation.

EMC requirements are covered by draft prETS 300 445.

Additional standards or specifications may be required for equipment intended to interface to the Public Switched Telephone Network (PSTN). This facility may be submitted to regulatory conditions.

This I-ETS may be used by accredited test laboratories for type testing of the equipment. The performance of the equipment submitted for type testing should be representative of the performance of the corresponding production models.

This I-ETS contains instructions for the presentation of equipment for type testing purposes.

Power limits recommended in this I-ETS have been chosen to allow maximum simultaneous reusage of frequency allocations. National regulations on power output may apply up to the limits quoted below.

NOTE: If higher power limits are required reference should be made to draft prl-ETS 300 454 Wide band audio links, which is currently under preparation.

The types of equipment covered by this I-ETS are as follows:

- professional hand held radio microphones;

- professional body worn radio microphones;

- consumer radio microphones;

- tour guide systems;

- aids for the handicapped.

The classes of equipment given in this I-ETS are as follows:

- class 1 equipment would normally be considered as a category requiring an operator licence;

- class 2 equipment would be considered in some countries as not requiring an operator licence.