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 LETS 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 Generalized Tamed Frequency Modulation (GTFM), provided that the modulation spectrum lies within a standardized spectral mask.

This LETS 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 LETS 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 I-ETS 300454 wide band audio links, which is currently under preparation.