time delays on dab vs analogue
 

In article , Bill Wright
wrote:

"Dave Plowman (News)" wrote in message
...
In article , Bill Wright
wrote:

"Dave Plowman (News)" wrote in message
...
In article , comp.john
wrote:
When the time signal arrives, which is the accurate one. DAB or
analogue?

Rather obviously the earliest one - as you can delay something, but
not make it happen before it does, as it were. If you could, you've
just invented time travel.

No, clever clogs, that's ********. The BBC could play the pips early
so as to make them more-or-less right for DAB. In theory . . .

And go across the end of the preceding prog? Or to avoid this you'd
need a long gap between live progs. And of course the pips are usually
in between live spots.

Not a theory you've thought through, Bill. ;-)

I have, I have! I reckon it would not be beyond the wit of the BBC to
play the preceding programme early as well. All they need to do is alter
the clocks at Broadcasting House so they are a few seconds in front of
the rest of us.

and that was considerd at one point in the 90s.

--
From KT24

Using a RISC OS computer running v5.11

time delays on dab vs analogue
 

In message , Bill Wright
writes

"charles" wrote in message
. ..
In article ,
Max Demian wrote:
"Norman Wells" wrote in message
...
Max Demian wrote:
Sounds rather digital to me, if it matters.

Does anyone know how the analogue clocks adjust when the clocks go back?
Do they buzz backwards, or just stop for an hour?

As a young child in hospital I watched the ward clock adjust itself at a
rapid rate. I can't remember why it did this, but years later I learnt that
all the clocks in the hosputal were controlled and powered by electrical
pulses, and could all be adjusted together.

A lot of factories had clocks like this. I don't know if they could
actually work as 'normal' clocks. The benefits of this technology would
be that there would be no arguments about clocking on and off times, and
also that there was no point in the workers nicking them.
--
Ian

time delays on dab vs analogue
 

In message , Bill Wright
writes

"Dave Plowman (News)" wrote in message
...
In article ,
Bill Wright wrote:

"Dave Plowman (News)" wrote in message
...
In article ,
comp.john wrote:
When the time signal arrives, which is the accurate one. DAB or
analogue?

Rather obviously the earliest one - as you can delay something, but not
make it happen before it does, as it were. If you could, you've just
invented time travel.

No, clever clogs, that's ********. The BBC could play the pips early so
as to make them more-or-less right for DAB. In theory . . .

And go across the end of the preceding prog? Or to avoid this you'd need a
long gap between live progs. And of course the pips are usually in between
live spots.

Not a theory you've thought through, Bill. ;-)

I have, I have! I reckon it would not be beyond the wit of the BBC to play
the preceding programme early as well. All they need to do is alter the
clocks at Broadcasting House so they are a few seconds in front of the rest
of us.

I don't really have satellite TV (apart from an old analogue Grundig),
but I'm sure that Sky used to appear to be 'dead on time'. To compensate
for the travel time, I assumed that they set their clocks about one
second fast.
--
Ian

time delays on dab vs analogue
 

In message , Mark Carver
writes
charles wrote:
In article ,
Mark Carver wrote:
Woody wrote:

Indeed I suspect they may actually do that as there is
distribution delays on the FM system as well.

Remind me again, what does the 'I' in NICAM stand for ?
but the N stands for "Near"

Yes, well, Near enough :-)

"N" was probably a better choice than "A" ("almost")!

I did conduct an experiment once when Holme Moss became receivable in
Hampshire during a lift. I tuned one radio to Rowridge, the other to
Holme Moss. I could not hear any time delay.

I remember once hearing some MW pips from a Spanish station. They were
about 30 seconds late. Maybe it's just the 'mañana attitude' they have
about this sort of thing.
--
Ian

time delays on dab vs analogue
 

In message , Bill Wright
writes

"Max Demian" wrote in message
...
"Bill Wright" wrote in message
...

"Dave Plowman (News)" wrote in message
...
In article ,
comp.john wrote:
When the time signal arrives, which is the accurate one. DAB or
analogue?

Rather obviously the earliest one - as you can delay something, but not
make it happen before it does, as it were. If you could, you've just
invented time travel.

No, clever clogs, that's ********. The BBC could play the pips early so
as to make them more-or-less right for DAB. In theory . . .

How can they play them before they are sent from Herstmonceux?

Easy. Record the ones sent for the previous hour and play them back.

Is Terry Wogan still 'Crashing the Pips' like he used to?
--
Ian

time delays on dab vs analogue
 

In article ,
Ian Jackson wrote:
In message , Mark Carver
writes
charles wrote:
In article ,
Mark Carver wrote:
Woody wrote:

Indeed I suspect they may actually do that as there is
distribution delays on the FM system as well.

Remind me again, what does the 'I' in NICAM stand for ?
but the N stands for "Near"

Yes, well, Near enough :-)

"N" was probably a better choice than "A" ("almost")!

I did conduct an experiment once when Holme Moss became receivable in
Hampshire during a lift. I tuned one radio to Rowridge, the other to
Holme Moss. I could not hear any time delay.

I remember once hearing some MW pips from a Spanish station. They were
about 30 seconds late. Maybe it's just the 'mañana attitude' they have
about this sort of thing.

it was interesting to have the London "Speaking Clock" aka TIM on one
handset and the Inverness one on another - one to each ear. This was in
the days of GPO landlines.

--
From KT24

Using a RISC OS computer running v5.11

time delays on dab vs analogue
 

In message , charles
writes
In article ,
Ian Jackson wrote:
In message , Mark Carver
writes
charles wrote:
In article ,
Mark Carver wrote:
Woody wrote:

Indeed I suspect they may actually do that as there is
distribution delays on the FM system as well.

Remind me again, what does the 'I' in NICAM stand for ?
but the N stands for "Near"

Yes, well, Near enough :-)

"N" was probably a better choice than "A" ("almost")!

I did conduct an experiment once when Holme Moss became receivable in
Hampshire during a lift. I tuned one radio to Rowridge, the other to
Holme Moss. I could not hear any time delay.

I remember once hearing some MW pips from a Spanish station. They were
about 30 seconds late. Maybe it's just the 'mañana attitude' they have
about this sort of thing.

it was interesting to have the London "Speaking Clock" aka TIM on one
handset and the Inverness one on another - one to each ear. This was in
the days of GPO landlines.

Interesting - but what were the results of this experiment? How great
was the time difference?
--
Ian

time delays on dab vs analogue
 

In article ,
Bill Wright wrote:
And go across the end of the preceding prog? Or to avoid this you'd
need a long gap between live progs. And of course the pips are usually
in between live spots.

Not a theory you've thought through, Bill. ;-)

I have, I have! I reckon it would not be beyond the wit of the BBC to
play the preceding programme early as well. All they need to do is
alter the clocks at Broadcasting House so they are a few seconds in
front of the rest of us.

Given I assume you're talking about a national service like R2 or R4, what
about those listening on FM? If everything was recorded it would be just
possible - but so much on those is live.

--
*What was the best thing before sliced bread? *

Dave Plowman London SW
To e-mail, change noise into sound.

time delays on dab vs analogue
 

That is interesting, so it seems that some programs are sent via different
routes, which begs the question, how do they get them in sync when they do a
changeover from one mode to the other in the network?

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"Dave Plowman (News)" wrote in message
...
In article ,
Brian Gaff wrote:
I'd say that yes, it is all wrong. However, worse is to come. Sometimes
when i use my scanner, i can pick up bbc radio talkback for interviews
etc, this is quite often some three seconds ahead of the output from my
fm tuner, so the time signals on the distribution networks are hardly
that accurate either.

They certainly are on analogue R4 - as close as I can tell on a radio
controlled clock.

--
*I can see your point, but I still think you're full of ****.

Dave Plowman London SW
To e-mail, change noise into sound.

time delays on dab vs analogue
 

In article ,
Dave Plowman (News) wrote:
In article ,
Bill Wright wrote:
And go across the end of the preceding prog? Or to avoid this you'd
need a long gap between live progs. And of course the pips are usually
in between live spots.

Not a theory you've thought through, Bill. ;-)

I have, I have! I reckon it would not be beyond the wit of the BBC to
play the preceding programme early as well. All they need to do is
alter the clocks at Broadcasting House so they are a few seconds in
front of the rest of us.

Given I assume you're talking about a national service like R2 or R4, what
about those listening on FM?

A delay line in the output ?


If everything was recorded it would be just possible - but so much on
those is live.

The only time that would show as a problem is when a live clock is actually
broadcast. - Big Ben - on the hour?

--
From KT24

Using a RISC OS computer running v5.11