From the interview:
“The report is incorrect in that implies that there has been an interference complaint about PLC – I think the slide is ambiguous and that the interference was with DSL or was being demonstrated as potential.”
Well slide 15 is titled “PLC measurements relative to ambient noise in Crieff, Scotland” it clearly shows three traces;
1) Mainnet
2) Ascom
3) Measured local background
The traces show massive amounts of interference.
The slide is not ambiguous it is totally clear – SSE is operating a system that pollutes the shortwave. Trevor Clarkson is a very accomplished Engineer and to “rubbish” his presentation this way is a total and utter disgrace.
“The full RA report is available on the web and the RA has also recently confirmed that despite the levels outlined in these reports no interference cases have arisen from the trials in Scotland.”
And what about the interference documented in the BBC report?
http://www.bbc.co.uk/rd/pubs/whp/whp067.html
Extracts from the BBC report;
The degree of interference to reception varied somewhat with location, between "annoying," and a level sufficient to make the broadcast completely unintelligible. The latter was certainly the case just beyond the nearby premises where a repeater was known to be situated (item 15) but some other locations were almost as bad, although the reason why these were worse than others was not always immediately apparent. Some correlation was noted with the underground run of the main distributor cable. Curiously the location near to the sub station was not the worst although badly affected.
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.
In conclusion, it is totally clear that PLC has a major interference problem that SSE is continuing to deny in the face of massive amounts of clear and overwhelming evidence.
The competent authorities should move to shut these systems down until SSE can prove beyond any doubt that they can operate PLC systems without generating interference.
“The report is incorrect in that implies that there has been an interference complaint about PLC – I think the slide is ambiguous and that the interference was with DSL or was being demonstrated as potential.”
Well slide 15 is titled “PLC measurements relative to ambient noise in Crieff, Scotland” it clearly shows three traces;
1) Mainnet
2) Ascom
3) Measured local background
The traces show massive amounts of interference.
The slide is not ambiguous it is totally clear – SSE is operating a system that pollutes the shortwave. Trevor Clarkson is a very accomplished Engineer and to “rubbish” his presentation this way is a total and utter disgrace.
“The full RA report is available on the web and the RA has also recently confirmed that despite the levels outlined in these reports no interference cases have arisen from the trials in Scotland.”
And what about the interference documented in the BBC report?
http://www.bbc.co.uk/rd/pubs/whp/whp067.html
Extracts from the BBC report;
The degree of interference to reception varied somewhat with location, between "annoying," and a level sufficient to make the broadcast completely unintelligible. The latter was certainly the case just beyond the nearby premises where a repeater was known to be situated (item 15) but some other locations were almost as bad, although the reason why these were worse than others was not always immediately apparent. Some correlation was noted with the underground run of the main distributor cable. Curiously the location near to the sub station was not the worst although badly affected.
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.
In conclusion, it is totally clear that PLC has a major interference problem that SSE is continuing to deny in the face of massive amounts of clear and overwhelming evidence.
The competent authorities should move to shut these systems down until SSE can prove beyond any doubt that they can operate PLC systems without generating interference.























