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 M Hz 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 Modulated Shift Keying ( G M SK) or Generalised Tamed Frequency Management ( GTFM ) , provided that the modulation spectrum lies within a standardised 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.

This I-ETS does not cover radiated emissions below 2 5 M Hz . It is anticipated that methods of measurements and minimum standards for such emissions will be covered by specifications supporting Council Directive 89/336/EEC.

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

This I-ETS may be used b y 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 re-usage of frequency allocations. National regulations on power output may apply up to the limits quoted below.