[mythtv-users] All BBC channels are gone
linux at thehobsons.co.uk
Wed Apr 4 09:51:59 UTC 2012
Thomas Boehm wrote:
>It looks like the digital switchover starts today. I might be a bit
>daft, but am I not using digital already?
The switchover goes in several stages - we went through it some time
ago, once again the North West (Winter Hill transmitter) lead where
others follow :-)
Up until yesterday you'll have been getting a limited number of
muxes, at low power, that will have been shoehorned into the spectrum
at frequencies chosen to minimise interference with existing analogue
The first step they do is to turn off BBC 2 on analogue to free up
it's frequency - and replace it with one digital mux. That's why you
need to rescan now to get all the channels back. I vaguely recall
that this mux carried the main analogue channels meaning that people
could switch to digital (ie drop analogue altogether and not have to
keep switching analogue-digital) without losing anything.
> * At around midnight, the analogue BBC Two service and
>the existing digital BBC services will be switched off at the
>Crystal Palace transmitter and its fifty four relays.
> * The remaining analogue services, BBC One, ITV and
>Channel 4 will continue to be available but may be subject to
> * The existing digital services broadcast from the main
>Crystal Palace transmitter will remain on-air but are subject to
>breaks in service.
> * Digital television services will be restored
>throughout the day.
After a couple of weeks (giving people time to sort themselves out on
digital) they will turn off the rest of the analogue and bring up all
the digital muxes on their permanent frequencies. You will need to
rescan again when this happens.
> * At around midnight, all analogue services will be
>switched off and will stop broadcasting permanently.
> * During the day, new high powered digital services are
>launched. Find out when your services will be available.
After that, you should be up and running with the permanent muxes.
For us, there then followed a seemingly never ending stream of minor
channel changes (mostly replacing content (eg Men & Motors) with yet
another shopping channel) - each requiring a rescan :-( Hopefully by
now all that is more or less settled, there'll just be minor changes
as channels come and go.
You might want to take a look at
edit the script to your own tastes, and you'll find it becomes much
easier to rescan and reset your channel lineup.
Also, be aware that if you can get signals from more than one
transmitter, you'll need to do a bit more work.
Delete all channels and delete all transports. Manually scan only one
frequency (you'll need to find the frequency of one main mux on your
preferred transmitter) - this should pick up the other transports
from that transmitter. Then "scan existing transports" to get all the
Manually delete transports from transmitters you don't want to use.
Then scan existing transports.
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