 years after the Directive came into force on technology 1st January 1992. It allows apparatus to continue to be governed by equipment the national arrangements in force in each member state, in the Generic EN50081 absence of European or approved national standards. Telecommuni- emissions cations Terminal Equipment (TTE) is subject to a separate Directive (91/263/EEC), but this does not prevent it also having to comply Mains BS5406 EN60555 with the EMC Directive, except that EMC requirements 'specific to disturbances (IEC555) TTE' must be tested and certified as part of the TTE type approval process. The EMC aspects of radio transmitters are subject to type approval as part of the EMC Directive. Table 23.6 Immunity standards ( - indicates that these 23.10.2 Standards standards are aligned) The European electrotechnical standards body is CENELEC (the Product British Notes European Organisation for Electrotechnical Standardisation) which sector CISPR has UK representation from the BSI (the British Standards Institu- Industrial BS6667 tion). The telecommunications standards body is ETSI (the Euro- process ESD & pean Telecommunications Standards Institute). Once CENELEC or measurement transient ETSI have produced and agreed a European EMC standard all the susceptibi CENELEC countries have to implement identical national stand- control ards, which will then be deemed to be "relevant standards' for the purpose of demonstrating compliance with the Directive. The self Radio & BS905-2 CISPR EN55020 RFI only certification route is the preferred method of demonstrating com- TV receivers pliance with the Directive, and this depends on the availability of Information EN55101 harmonized standards. technology ESD etc. equipment Generic EN50082 23.10.2.1 Emission standards immunity A number of product oriented standards already exist and can be applied to products where this is possible and reasonable. Since emission standards have evolved over a number of years there is a Open Area Test Site (OATS) to minimise reflections, with