Electromagnetic Compatibility: Sources and levels of disturbances in the telecommunications environment

The electromagnetic environment in which telecommunications equipment has to operate may vary from favourable to very hostile, partly by reason of ambient conditions and partly because a considerable range and volume of disturbance is generated by the equipment itself. This Paper provides an overall review of the environment in both Administration and customer occupied buildings. It examines the controls and regulations currently existing and under discussion and studies the effects of hostile conditions upon the equipment. Some real-life cases will be described to demonstrate the points made and give engineers who may be unfamiliar with the subject an insight into its practicalities. Finally, the work of the IEC International Special Committee on Radio Interference (CISPR) and that of the Conference of European Posts and Telecommunications (CEPT) in the field of Electromagnetic Compatibility as it applies to telecommunications will be reviewed.