Power-line Broadband

BBC Research and Development has just put a report "The Effect of power-line
telecommunications on broadcast reception - brief trial in Crieff" on its
website:

http://www.bbc.co.uk/rd/pubs/whp/whp067.html

Gives some details on the equipment and methods used for the 'Broadband over
power cables' system used by Scottish and Southern Electricity.

In article <bm0oks$h9u1u$(E-Mail Removed)>, Mark Carver
<(E-Mail Removed)> writes
>BBC Research and Development has just put a report "The Effect of power-line
>telecommunications on broadcast reception - brief trial in Crieff" on its
>website:
>
>http://www.bbc.co.uk/rd/pubs/whp/whp067.html
>
>Gives some details on the equipment and methods used for the 'Broadband over
>power cables' system used by Scottish and Southern Electricity.

It's also a disturbing read for anyone who has an interest in using the
LF and HF radio spectrum. The initial tests appear to show an
unacceptable level of interference to reception and I would imagine
that anyone living near to a high power HF transmitting station
could find their broadband link is unreliable.
--
Les

"Mark Carver" <(E-Mail Removed)> wrote in message
news:bm0oks$h9u1u$(E-Mail Removed)...
> BBC Research and Development has just put a report "The Effect of
power-line
> telecommunications on broadcast reception - brief trial in Crieff" on its
> website:
>
> http://www.bbc.co.uk/rd/pubs/whp/whp067.html
>
> Gives some details on the equipment and methods used for the 'Broadband
over
> power cables' system used by Scottish and Southern Electricity.

Disappointing, but its only its in early days yet. Southern electric had
some concerns over interference, and are trying to address these issues.
I think it would be fair to test at a different site aswell as Crieth, like
Winchester which is also in the trial, as the results may be a causitive
effect of something else. Unlikely, but if I were doing research I would
not rely on one sample

In article <bm1jd8$17m$(E-Mail Removed)>, Beck
<(E-Mail Removed)> writes
>
>"Mark Carver" <(E-Mail Removed)> wrote in message
>news:bm0oks$h9u1u$(E-Mail Removed)...
>> BBC Research and Development has just put a report "The Effect of
>power-line
>> telecommunications on broadcast reception - brief trial in Crieff" on its
>> website:
>>
>> http://www.bbc.co.uk/rd/pubs/whp/whp067.html
>>
>> Gives some details on the equipment and methods used for the 'Broadband
>over
>> power cables' system used by Scottish and Southern Electricity.
>
>Disappointing, but its only its in early days yet. Southern electric had
>some concerns over interference, and are trying to address these issues.
>I think it would be fair to test at a different site aswell as Crieth, like
>Winchester which is also in the trial, as the results may be a causitive
>effect of something else. Unlikely, but if I were doing research I would
>not rely on one sample
>
Unfortunately the interference problem won't easily go away, of the two
systems in use at Crieff Ascom produced heavy interference on spot
frequencies and Main.Net produced a high level of noise over a large
part of the HF spectrum. These conditions will be the same regardless
of location in the UK. Given the chance and the co-operation of
the electricity companies I'm sure the BBC and other users of the HF
spectrum would love to carry out more research in other areas.
Whether this would be in the interest of the PLT suppliers is another
matter.
--
Les

In article <zVBOD$No7Fh$(E-Mail Removed)>, Les Thompson
said......

> In article <bm1jd8$17m$(E-Mail Removed)>, Beck
> <(E-Mail Removed)> writes
> >
> >"Mark Carver" <(E-Mail Removed)> wrote in message
> >news:bm0oks$h9u1u$(E-Mail Removed)...
> >> BBC Research and Development has just put a report "The Effect of
> >power-line
> >> telecommunications on broadcast reception - brief trial in Crieff" on its
> >> website:
> >>
> >> http://www.bbc.co.uk/rd/pubs/whp/whp067.html
> >>
> >> Gives some details on the equipment and methods used for the 'Broadband
> >over
> >> power cables' system used by Scottish and Southern Electricity.
> >
> >Disappointing, but its only its in early days yet. Southern electric had
> >some concerns over interference, and are trying to address these issues.
> >I think it would be fair to test at a different site aswell as Crieth, like
> >Winchester which is also in the trial, as the results may be a causitive
> >effect of something else. Unlikely, but if I were doing research I would
> >not rely on one sample
> >
> Unfortunately the interference problem won't easily go away, of the two
> systems in use at Crieff Ascom produced heavy interference on spot
> frequencies and Main.Net produced a high level of noise over a large
> part of the HF spectrum. These conditions will be the same regardless
> of location in the UK. Given the chance and the co-operation of
> the electricity companies I'm sure the BBC and other users of the HF
> spectrum would love to carry out more research in other areas.
> Whether this would be in the interest of the PLT suppliers is another
> matter.
>
Interesting discussions on PLT interference on the 'Other Broadband
Technologies' forum on ADSLGuide.
Aussies aren't to happy with it either.
--
Mugwump

Reply-to address is ignored.
Reply to 'usenetmail{at}discworld{dot}org{dot}uk

On Wed, 8 Oct 2003 20:28:19 +0100, Mugwump <(E-Mail Removed)> wrote:

[snip]

>>
>Interesting discussions on PLT interference on the 'Other Broadband
>Technologies' forum on ADSLGuide.
>Aussies aren't to happy with it either.

Indeed:

http://www.telecomtv.com/newComms.php?cd_id=3018

--
RM

On Wed, 08 Oct 2003 21:00:24 +0100, Rick Marks <(E-Mail Removed)> wrote:

>On Wed, 8 Oct 2003 20:28:19 +0100, Mugwump <(E-Mail Removed)> wrote:
>
>[snip]
>
>>>
>>Interesting discussions on PLT interference on the 'Other Broadband
>>Technologies' forum on ADSLGuide.
>>Aussies aren't to happy with it either.
>
>Indeed:
>
>http://www.telecomtv.com/newComms.php?cd_id=3018
>

And Singapore has seen the light too. On the business case (or rather,
the lack of....)

http://www.telecomtv.com/newComms.php?cd_id=2730

(last para)

--
RM

The Radiocommunications Agency is also concerned about PLC/PLT
interference issues and has published a full report on the Crieff
system here;

http://www.radio.gov.uk/topics/resea...c/edcrie_2.pdf

The PLC "Del Boy" has this chant "No interference reports" raise the
issue of interference, he chants. This is the root of the problem, we
all know (including the PLC/PLT Del Boys) that PLC/PLT transmits
rubbish all over the bands but few people have formally lodged
complaints.

The PLC/PLT systems are located in Winchester (by the jail),
Stonehaven,
Crieff and Campbeltown.
Some information here;
http://www.southern-electric.co.uk/broadband/intro.asp
http://www.hydro.co.uk/broadband/intro.asp
The SSE web site is very circumspect on the location of their systems
(I wonder why?).

For information on what to listen for when in a PLC/PLT area visit;
http://www.qsl.net/rsgb_emc/pltsounds.html

If you experience interference and would like to make a complaint
visit here;

http://www.radio.gov.uk/topics/broad...adio/index.htm

Ensure that your complaint is detailed in writing and you get an
acknowledgement from the RA that they have received your complaint and
ask what action they will take and when.


Les Thompson <(E-Mail Removed)> wrote in message news:<zVBOD$No7Fh$(E-Mail Removed)>...
> In article <bm1jd8$17m$(E-Mail Removed)>, Beck
> <(E-Mail Removed)> writes
> >
> >"Mark Carver" <(E-Mail Removed)> wrote in message
> >news:bm0oks$h9u1u$(E-Mail Removed)...
> >> BBC Research and Development has just put a report "The Effect of
> power-line
> >> telecommunications on broadcast reception - brief trial in Crieff" on its
> >> website:
> >>
> >> http://www.bbc.co.uk/rd/pubs/whp/whp067.html
> >>
> >> Gives some details on the equipment and methods used for the 'Broadband
> over
> >> power cables' system used by Scottish and Southern Electricity.
> >
> >Disappointing, but its only its in early days yet. Southern electric had
> >some concerns over interference, and are trying to address these issues.
> >I think it would be fair to test at a different site aswell as Crieth, like
> >Winchester which is also in the trial, as the results may be a causitive
> >effect of something else. Unlikely, but if I were doing research I would
> >not rely on one sample
> >
> Unfortunately the interference problem won't easily go away, of the two
> systems in use at Crieff Ascom produced heavy interference on spot
> frequencies and Main.Net produced a high level of noise over a large
> part of the HF spectrum. These conditions will be the same regardless
> of location in the UK. Given the chance and the co-operation of
> the electricity companies I'm sure the BBC and other users of the HF
> spectrum would love to carry out more research in other areas.
> Whether this would be in the interest of the PLT suppliers is another
> matter.