The sad thing is that I am not convinced that everybody contributing to this
thread is being ironic.

Hay, perhaps all those ex Channel 5 re-tuners could be re-trained (?)



--
Graham.



%Profound_observation%

On Wed, 09 Feb 2005 21:33:47 +0000, Lurch
wrote:

On Wed, 09 Feb 2005 21:10:42 -0000, Arthur strung
together this:

Since it is planned to switch off analogue services and replace them
with
digital multiplexes ON THE SAME CHANNELS, I fail to see how this will
work.

Filters.

1. Read the words in upper case
2. Think again


How are you at designing filters? ;-)

Very good actually, I'm been doing it for years.
But I can't design a filter that will allow a relay to transmit an
analogue signal on the same frequency that it is receiving a digital one.
Can you?

Arthur

Thus spaketh JPG:
On Wed, 9 Feb 2005 16:35:46 -0000, "Ian Middleton"
wrote:

What we need to ease pain of analogue switch off is a box that takes
DTT signal in and produces 5 RF channels out at the same frequencies
the existing analogue channels were. This would be placed in the
loft (or where ever) to provide analogue channels rest of equipment.

That way all these people that have 10 TV's and 8 VCR's etc in their
homes and have no intention of switching to digital will be all
happy. They install box and carry on using their equipment as before
not noticing any change.

Oh, this box could be installed for free by those wanting all the DTT
frequency space or if it costs cost less than just using 5 DTT boxes.


They will, however, find Ceefax and Teletext has disappeared, the
picture may freeze from time to time, or dissolve into large coloured
blocks, and there will occasionally be a sound similar to a walrus
farting into a gerry can coming from their TV's loudspeakers.

JPG

And having to go up into the loft every so often resetting the system, because
it locked up.

On Wed, 9 Feb 2005 21:41:46 -0000, "Graham" wrote:

The sad thing is that I am not convinced that everybody contributing to this
thread is being ironic.

Hay, perhaps all those ex Channel 5 re-tuners could be re-trained (?)

I was also trying to work out where the irony stops and reality
begins.

Technically a box that would turn the signal into five separate
analogue signals is a box with five tuners in, and therefore would
cost around the same cost as five boxes, which would give you all the
benefits of digital.

Personally I think the government is trying to push it through too
fast, 2008 for the first switch off is too soon. The other issue that
could push all this back is economics, if the pound remains as strong
compared with China then cheap Chinese components and boxes will make
switchover less painful. If that situation changes though, it could
all become a lot more expensive and painful.

You are joking of course. Why don't we ask the broadcasters to transmit
black and white pictures for all those refusniks who yearn for the days of
405 line TV. Please!


"Ian Middleton" wrote in message
...
What we need to ease pain of analogue switch off is a box that takes DTT
signal in and produces 5 RF channels out at the same frequencies the
existing analogue channels were. This would be placed in the loft (or
where ever) to provide analogue channels rest of equipment.

That way all these people that have 10 TV's and 8 VCR's etc in their homes
and have no intention of switching to digital will be all happy. They
install box and carry on using their equipment as before not noticing any
change.

Oh, this box could be installed for free by those wanting all the DTT
frequency space or if it costs cost less than just using 5 DTT boxes.

"Arthur" wrote
| Lurch wrote:
| Since it is planned to switch off analogue services and replace
| them with digital multiplexes ON THE SAME CHANNELS, I
| fail to see how this will work.
| Filters.
| 1. Read the words in upper case
| 2. Think again
| How are you at designing filters? ;-)
| Very good actually, I'm been doing it for years.
| But I can't design a filter that will allow a relay to transmit an
| analogue signal on the same frequency that it is receiving a digital one.
| Can you?

But we are not talking about a relay transmitter. It's quite normal (cue
Bill) to use filters to block 'broadcast' signals at the input of a
distrbution system to release channels for use with in-house modulated
channels. Provided the screening etc is all right.

However I don't see why filters are needed anyway. (a) If the device is to
be used *only* with analogue tellies downstream, it doesn't need analogue
pass-through. (b) The analogue outputs don't have to be on the same channels
as the analogue broadcast channels currently use, and the muxes will in
future use. They can be shifted to any free channels and the tellies
re-tuned.

Such a device, however, would not only have to cope with the ordinary
picture, it would have to decode digital subtitles and re-encode as teletext
subtitles. Most multi-telly households will use digital already, it will be
the elderly with their wood-grain sets who will be unwilling to move to
digital, and they will demand subtitles. Distribution systems in old
peoples' homes could be a market, and will have to provide access to
subtitles under disability discrimination law. Therefore whilst there will
be a demand for multi-channel decoders it will not be at the consumer end of
the market.

Owain

Arthur wrote:
On Wed, 09 Feb 2005 21:33:47 +0000, Lurch
wrote:

On Wed, 09 Feb 2005 21:10:42 -0000, Arthur strung
together this:

Since it is planned to switch off analogue services and replace them
with
digital multiplexes ON THE SAME CHANNELS, I fail to see how this will
work.

Filters.

1. Read the words in upper case
2. Think again


How are you at designing filters? ;-)

Very good actually, I'm been doing it for years.
But I can't design a filter that will allow a relay to transmit an
analogue signal on the same frequency that it is receiving a digital one.
Can you?

Yep.
Box plugged into ariel, auto-tunes, produces 1,2,3,4,5 on 61,62,63,64,65
and optionally replicates muxes on 66,67,68,69,70 (for example), it does
not provide pass-through.
(it may be neater to guess the analog frequencies from the transmitter being
used, and a look-up table, to avoid retuning)

"Mick G" wrote
| You are joking of course. Why don't we ask the broadcasters to
| transmit black and white pictures for all those refusniks who
| yearn for the days of 405 line TV. Please!

Yes please, I'd swap the potter's wheel for most of BBC's daytime output any
time.

Owain

On Wed, 09 Feb 2005 23:27:24 +0000, Ed wrote:

Technically a box that would turn the signal into five separate
analogue signals is a box with five tuners in, and therefore would
cost around the same cost as five boxes, which would give you all the
benefits of digital.

The benefit of digital is having more channels. Your "solution" is the
worst of both worlds.
--
Andrew, contact via interpleb.blogspot.com
Help make Usenet a better place: English is read downwards,
please don't top post. Trim replies to quote only relevant text.
Check groups.google.com before asking an obvious question.

steve wrote:

On Wed, 09 Feb 2005 16:44:52 +0000, Nick wrote:

I suggested exactly the same thing on this group a while ago. I'm surprised
that such a box isn't available yet.

It has been suggested that a Mux could be started at much higher power
than now transmitting 1-5 (you could also add teletext).

Having decent coverage with one mux at high power is easier than six. You
could then turn of analogue and everyone(ish) would have DTT coverage for
these channels. This would then make such a box much more economical.

Also, what benefit would such a box give at the moment?

None, unfortunately, while analogue is still available. And the
broadcasters wouldn't like it. The BBC wouldn't like a system that only
allowed you to get BBC1 and BBC2, and ITV would like it even less.

So it's a good idea from the point of view of any consumer that didn't
want digital in the first place, but without any backers, it's a
non-starter.

--
Dave Farrance