JV
James Vertigan
Founding member
I wonder if they'll produce a 3D version of it if 3D TV sales pick up - now that would be scary if she suddenly leapt out of the TV at you!
JV
Yes - viewing figures are down!
James Vertigan
Founding member
So, for those who tune in every year, how does this test compare to the last? Has DSO had a marked effect?
Yes - viewing figures are down!
JV
James Vertigan
Founding member
It's BBC Two time!
Hehe - I've taken this opportunity to go back to the good old days of "the test card and some music" I've got the sound from Pages from Ceefax on BBC Two digital on my Sky box coming through my home cinema speakers and the picture from BBC Two analogue on the TV. They go quite well together!
Hehe - I've taken this opportunity to go back to the good old days of "the test card and some music" I've got the sound from Pages from Ceefax on BBC Two digital on my Sky box coming through my home cinema speakers and the picture from BBC Two analogue on the TV. They go quite well together!
Last edited by James Vertigan on 18 July 2010 4:27am - 2 times in total
JO
How things looked from Pontop Pike:
http://www.youtube.com/watch?v=m-iW5fy55Tk (BBC One)
http://www.youtube.com/watch?v=NC9AkYL5LH8 (BBC Two)
http://www.youtube.com/watch?v=m-iW5fy55Tk (BBC One)
http://www.youtube.com/watch?v=NC9AkYL5LH8 (BBC Two)
LL
This'll sound daft to some readers, but why do these tests only apply to analogue? How come digital doesn't need such treatment?
IS
The BBC analogue transmission chain has a back up system whereby if the feed to a transmitter is lost it receives it off-air from another one down the country (towards London) and rebroadcasts it.
These annual tests are to make sure this system is working. Rather than do it on an individual basis, they test them all at the same time by simulating the loss of the feed to the whole country - the worst case scenario. They do this literally by pulling out a couple of plugs at TV Centre which then removes BBC1/2 from every transmitter in the country except Crystal Palace. This sends them all into rebroadcast mode, each relaying the TX next to it right down to CP.
This system only applies to analogue though. Although I'm sure it would be possible the new digital network has a more modern back up
This'll sound daft to some readers, but why do these tests only apply to analogue? How come digital doesn't need such treatment?
The BBC analogue transmission chain has a back up system whereby if the feed to a transmitter is lost it receives it off-air from another one down the country (towards London) and rebroadcasts it.
These annual tests are to make sure this system is working. Rather than do it on an individual basis, they test them all at the same time by simulating the loss of the feed to the whole country - the worst case scenario. They do this literally by pulling out a couple of plugs at TV Centre which then removes BBC1/2 from every transmitter in the country except Crystal Palace. This sends them all into rebroadcast mode, each relaying the TX next to it right down to CP.
This system only applies to analogue though. Although I'm sure it would be possible the new digital network has a more modern back up
