The present document covers the minimum characteristics considered necessary to effectively use the spectrum
allocated so as to avoid harmful interference. It does not necessarily include all the characteristics that may be required
by a user, nor does it necessarily represent the optimum performance achievable.
The present document applies to digital equipment operating on radio frequencies between 1 785 MHz and 1 800 MHz.
The present document does not preclude any digital FDMA modulation technique, provided that the modulation
spectrum lies within the standardized spectral mask.
Analogue FrequencyModulation (FM) is at present used for the majority of radio microphones and other similar
equipment and not within the scope of the present document.
The present document does not apply to radio microphones or in ear monitoring equipment employing Time Division
Multiple Access (TDMA), frequency hopping and spread spectrum or similar forms of modulation.
Electromagnetic compatibility (EMC) requirements are covered by EN 301 489-9 [4].
Power limits recommended in the present document have been chosen to allow maximum simultaneous reuse of
frequency allocations. National regulations on power output may apply up to the limits quoted below.
NOTE: For higher power equipment reference should be made to EN 300 454 [3] Wide band audio links.
Table 1
Equipment Effective radiated power (erp)
or conducted
Radio Microphones 50 mW
In ear monitoring 50 mW
The types of equipment covered by the present document are as follows:
- professional hand held radio microphones;
- professional body worn radio microphones;
- in ear monitoring systems.
The present document is intended to cover the provisions of article 3.2 of Directive 1999/5/EC (R&TTE Directive) [1]
article 3.2, which states that "¿radio equipment shall be so constructed that it effectively uses the spectrum allocated
to terrestrial/space radio communicatio (...abbreviated)