EMC and EEMC

All new technologies must be examined to determine whether they are electromagnetically compatible with existing broadcasting services. For example, broadband cable equipment – a principal distribution method of television services in Germany – uses frequency ranges which are actually designated for other broadcasting services. The reception of broadcasting services can also be impaired by wireless broadband technologies (e.g. Ultra-WideBand) and by small VHF transmitters, which enable music stored in portable devices to be played via a vehicle's radio.

In short, we must always seek out compromises which not only guarantee sufficient protection for terrestrial broadcast signals, but also accommodate the sensible usage of new cable-based and wireless technologies. IRT therefore works to ensure that broadcasting services can be received via antenna without any interference. We also represent the interests of broadcasters and others on various standardisation committees.

Electromagnetic fields can be hazardous to human health. On the basis of biophysical exposure models, several scientific committees have defined permissible parameters for electromagnetic radiation, commonly referred to as base values and derived limit values. Of particular importance are the limit values concerning electric field strength and magnetic field strength as well as the power flux density of the external electromagnetic field. Limit values have been proposed by organisations such as the International Commission on Non-Ionising Radiation Protection (ICNIRP), the European Commission, the American standardisation organisation ANSI/IEEE, and the German Commission for Electrical, Electronic & Information Technologies of DIN and VDE (DKE). These parameters are updated on an ongoing basis to reflect the state of science and technology.

Public broadcasters operate amplitude-modulated transmitters – reaching several hundred kW in some cases – which create considerable electric and magnetic field strengths in the vicinity of transmitting antennas. IRT develops organisational and technical solutions so that these transmitters’ limit values for operational personnel and the general public are not exceeded. IRT also helps draft German and international standards, and closely cooperates with corresponding regulatory authorities (e.g. federal ministries, federal offices, professional associations).