This European Standard for EMC emission requirements applies to professional audio, video, audio-visual and entertainment lighting control apparatus as defined in 3.6 intended for use in the environments described in Clause 4. This includes the digital apparatus defined in 3.5 and sub-assemblies, see 6.3. Disturbances in the frequency range 0 Hz to 400 GHz are covered, but requirements are not set over the whole of that range. See Note 5. NOTE 1 – In Annex D, information is included on infra-red radiation in the wavelength range 0,7 µm to 1,6 µm. Fault conditions of source or victim apparatus are not taken into account. Apparatus as defined in 3.4, 3.5 and 3.6 may be operated with any source of power. NOTE 2 – Sources of power may include, for example: the public low-voltage supply; private supplies with similar characteristics; a d.c. source provided specifically for the apparatus; batteries internal to the apparatus; stand by generators. Some standards may not apply to private low-voltage supplies. NOTE 3 – In special cases, for instance when highly susceptible apparatus is being used in proximity, additional mitigation measures may have to be employed to reduce the electromagnetic emission further, below the specified levels. NOTE 4 – Professional-user receiving apparatus may be very sensitive to disturbance; see Annex D. This European Standard does not apply to - consumer apparatus, - apparatus specifically designed for security systems, and - apparatus designed to radiate electromagnetic energy for radio communications purposes. NOTE 5 – To ensure freedom from interference, manufacturers should consider the characteristics of other equipment likely to be in the same environment and thus determine whether limitation of emissions in additional frequency ranges is necessary. The objective of this standard is to define limits and methods of measurement for apparatus defined in the scope, in relation to continuous and transient, conducted and radiated disturbances. These requirements represent essential electromagnetic compatibility requirements.