DSO question

On Thu, 20 Jan 2011 11:19:29 +0000, Mark Carver
wrote:

On 20/01/2011 10:58, Mark wrote:
On Thu, 20 Jan 2011 10:37:23 +0000, Mark Carver

Judging from the amount of nagging that has been going on for years I
would have thought that everyone who cares would have already done
something about it well before switchover ;-)

Apparently some people, despite months of nagging, don't do anything
until the event has happened, (and then complain !)

It also
reduces the workload on Arqiva with the amount of work they have to do
overnight, it's spread over two nights, 14 days apart.

Good point. I'm not sure how much work would be left to do for the
actual switchover. Won't it be a matter of just flicking a switch or
two?

No ! The old analogue transmitters are connected to the transmission
aerials with 6in feeders, that within the building is more akin to
plumbing. So to connect up the new high power DTT transmitters there's a
lot of mechanical work involved. Of course a lot is prep'ed before hand,
but even so there's an hour or two of frantic effort to switch the
feeders over.

You get some idea of what's involved from Stockland Hill's DSO photos

http://tx.mb21.co.uk/gallery/stockla.../dso/index.php

As far as relay stations are concerned, dual operation (analogue and
DTT) transposers are installed in the months leading up to DSO. On DSO
night it is more or less a flick of a switch at most of those, but of
course in some areas there are several dozen to visit overnight.

Thanks for the post. I don't quite understand why new aeriels are
required though.
--
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Mark Carver wrote:

As far as relay stations are concerned, dual operation (analogue and
DTT) transposers are installed in the months leading up to DSO. On DSO
night it is more or less a flick of a switch at most of those, but of
course in some areas there are several dozen to visit overnight.

On certain days this year I will need to visit 30 communal TV systems to
replace channel filters.

Bill

Mark Carver wrote:

Also, the existing high power analogue transmission aerials and feeders,
are unsuitable for 6 high power DTT muxes, so they've needed to be
replaced at just about all of the 50 main stations. In some cases
(Rowridge, Black Hill, Caldbeck) completely new masts have had to be
constructed.

Sutton C?

Bill

On 20/01/2011 14:29, Mark wrote:

Thanks for the post. I don't quite understand why new aeriels are
required though.

You can get some very high voltages produced with the sort of power
levels 6 x COFDM DTT muxes produce, far higher AIUI than 4 x analogue
transmissions, despite the peak power levels for analogue being higher
than the mean power for DTT, so new aerials are required.

Also some of the analogue aerial stacks are over 40 years old.

--
Mark
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On 20/01/2011 14:39, Bill Wright wrote:
Mark Carver wrote:

Also, the existing high power analogue transmission aerials and
feeders, are unsuitable for 6 high power DTT muxes, so they've needed
to be replaced at just about all of the 50 main stations. In some
cases (Rowridge, Black Hill, Caldbeck) completely new masts have had
to be constructed.

Sutton C?

No, just a temporary mast to maintain services while the permanent one
was significantly restyled. Same happened at Wenvoe.

--
Mark
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On 20/01/2011 13:57, Phil Cook wrote:
On Thu, 20 Jan 2011 11:19:29 +0000, Mark Carver wrote:

On 20/01/2011 10:58, Mark wrote:
On Thu, 20 Jan 2011 10:37:23 +0000, Mark Carver

Judging from the amount of nagging that has been going on for years I
would have thought that everyone who cares would have already done
something about it well before switchover ;-)

Apparently some people, despite months of nagging, don't do anything
until the event has happened, (and then complain !)

Some people live in areas without any terrestrial digital because it can't
be fitted in before switch over without compromising existing analogue
relays.

Of course what they need to do is figure out what type of receiver they
would like and then, before the rush and if they can, go and play with it
somewhere that they can get reception just to make sure it is what they
want.

I fully agree with your sentiments, don't get me wrong, I don't endorse
the way UK DSO has been organised. The matter of people with no DTT
reception until DSO has not been addressed properly, after 12 years 'the
authorities' are still paranoid about DTT causing interference to
analogue reception, to the extent where it's holding back benefits for
'the greater good'.

--
Mark
Please replace invalid and invalid with gmx and net to reply.

http://www.paras.org.uk/

Mark Carver wrote:
On 20/01/2011 14:39, Bill Wright wrote:
Mark Carver wrote:

Also, the existing high power analogue transmission aerials and
feeders, are unsuitable for 6 high power DTT muxes, so they've needed
to be replaced at just about all of the 50 main stations. In some
cases (Rowridge, Black Hill, Caldbeck) completely new masts have had
to be constructed.

Sutton C?

No, just a temporary mast to maintain services while the permanent one
was significantly restyled. Same happened at Wenvoe.

Oh, I didn't know that.

Bill

"Bill Wright" wrote in message
...
Mark wrote:

Judging from the amount of nagging that has been going on for years I
would have thought that everyone who cares would have already done
something about it well before switchover ;-)

I've been looking closely at the issue of the 'analogue' rump -- the
people who are still using analogue exclusively as DSO approaches -- in an
East Midlands town, and I'm actually struggling to find any candidates! I
think it's something like 1%, six months before DSO. However, if you ask
people, quite a few will say they need to get a digital box, yet it turns
out that they are using an IDTV. If the official figure of 93 - 97% is
based on asking people rather than actually looking at their TV equipment,
that's why it's wrong.

On a different job I recently had people telling me that they had Sky or
cable, yet it turned out that they had DTT. And one gentleman had a very
nice HDR but was unaware that he could record programmes on it.

And a local businessman recently paid me two bottles of decent wine to go
round and 'empty' his HD HDR.



I couldn't think of a single person using analogue, years before Mendip went
DSO.

Mark Carver wrote:

I fully agree with your sentiments, don't get me wrong, I don't endorse
the way UK DSO has been organised. The matter of people with no DTT
reception until DSO has not been addressed properly, after 12 years 'the
authorities' are still paranoid about DTT causing interference to
analogue reception, to the extent where it's holding back benefits for
'the greater good'.

Hxxxxxxxxn and Cxxxxxxxl.

Bill

Rick wrote:

I couldn't think of a single person using analogue, years before Mendip
went DSO.

I came across a bloke in a nice house with five of them living in it,
and they had analogue only, and the C5 was obliterated by the VCR RF
output. He was a total nutter though, and I think the kids were living
for the day when they could move out.

Bill