powerline radiation (EMI) (PLR)
The term Powerline Radiation stands for two interference radiations with different causes: On the one hand for the interference radiation generated by power lines, on the other hand for the interference radiation caused by Powerline Communication( PLC).
- Powerline Radiation(PLR) is spurious radiation caused by power lines. All power lines radiate electromagnetic fields. The spurious radiation depends on the configuration of the lines. It is more prevalent near transformer stations and substations, and is also caused by switching operations in utility grids, among other things. This PLR radiation can affect certain services such as powerline, since power line carriers (PLCs) use the power lines for transmission.
- The spurious radiation caused by power line transmission involves interference frequencies that are far above the harmonics of the power line frequency. Powerline transmission takes place in frequency ranges between 1.6 MHz and 30 MHz. However, this frequency range is also used by amateur radio. As a result, the interference radiation caused by Powerline, which occurs as broadband pulsed noise at a distance of up to approx. 500 m from the live line, can interfere with amateur radio. In the case of weak received signals, the signal-to-noise ratio may be so poor that it obscures the received signal. To avoid this, the electromagnetic radiation generated by PLC techniques should be reduced to a level that meets the requirements of the Electromagnetic Compatibility Act(EMCG). Since the AV2 standard uses the wider frequency range between 2 MHz and 68 MHz, powerline radiation is expected to tend to increase with Broadband Powerline. With the Gigle chip, which operates with frequencies up to 305 MHz, the FM range is then also affected.