This part of IEC 60728 applies to the radiation characteristics and immunity to electromagnetic disturbance of cable networks for television signals, sound signals and interactive services and covers the frequency range 0,15 MHz to 3,0 GHz. This standard specifies EMC performance requirements and lays down the methods of measurement. Cable networks beyond the network outlets (e.g. receiver leads, in simplest terms) which begin at the network outlet and at the subscriber's terminal equipment shall comply with these recommendations provided that no other specific provisions apply. To minimise the risk of interference to other radio services caused by possible radiation from a cable network and to limit the possible penetration of external signals which may interfere with the operation of a network, it is necessary not only to use equipment which satisfies the requirement of IEC 60728-2 regarding limits of radiation and of immunity to external fields, but, also, to ensure the integrity of all cable connections on each item of active or passive cable network equipment. Cable networks employing coaxial cables can be a source of interference to a wide range of services that utilise the radio frequency spectrum. These include not only emergency services, safety of life, broadcasting, aeronautical and radio navigation services but also land mobile, amateur and cellular radio services. As existing and planned radio services need to be protected, radiation limits specified for cabled networks should be complied with. Additional protection for certain services may be required by national regulations.