BBC R&D

Abstract

A brief site visit to Crieff is reported; it took place, at the invitation of Scottish and Southern Electricity, to examine some Power Line Telecommunications (PLT) installations (used to connect domestic and commercial premises to the internet). Two competing systems are described, examples of which were seen, and the scope for interference to HF broadcasting assessed. The circumstances of the trial limited the scale of scientific experimentation, nevertheless some clear conclusions are drawn. Both systems caused interference to HF reception, although one system appeared to have made some attempts to limit this. Some suggestions are made how co-existence between PLT and home radio reception might be investigated; such investigation would be essential before any wide-scale implementation of PLT. Audio recordings demonstrating the interference are available on the BBC R&D web site.