Standardization - to prepare standards and technical reports - in the field of electromagnetic compatibility (EMC), with particular emphasis on general application and use by product committees. (Horizontal function). The scope covers the following aspects of EMC: - Immunity and related items, over the whole frequency range: basic and generic standards, - emission in the low frequency range (f <= 9 kHz, e.g. harmonics and voltage fluctuations): basic, generic and product (family) standards, - emission in the high frequency range (f > 9 kHz): disturbances not covered by CISPR 10 (1992), in co-ordination with CISPR (e.g. mains signalling). Product immunity standards are not included. However, at the request of product committees, TC 77 may also prepare such standards under the co-ordination of ACEC. Horizontal Safety Function: Electromagnetic compatibility in so far as safety aspects are involved.