[mythtv-users] BBC HD sat mux transport parameter change...

John Pilkington J.Pilk at tesco.net
Wed Sep 5 21:54:53 UTC 2012

On 05/09/12 22:28, Andy Sheen wrote:
> Hi all,
> Any one with any clues about this. It must be an easy answer for those
> in the know (at least for what I can do by messing in the database).
> Thanks
> Andy
> On 4 September 2012 23:26, Andy Sheen <sheen.andy at googlemail.com
> <mailto:sheen.andy at googlemail.com>> wrote:
>     Hi all,
>     So Auntie Beeb are going to be playing with their parameters for the BBC
>     HD/BBC One HD stream on the 27th September.
>     According to: http://www.bbc.co.uk/blogs/aboutthebbc/2012/09/blah.shtml
>     They will be changing the transponder from:
>     10,847MHz, Vertical, DVB-S2, QPSK, 23M, 8/9 FEC
>     to:
>     10,847MHz, Vertical, DVB-S2, 8PSK, 23M, 2/3 FEC
>     Given the ONLY changes are QPSK -> 8PSK and 8/9 -> 2/3 FEC, this seems
>     like a change I'm willing to do via playing with the database directly
>     (backup/yes, I know I could kill the system, here might be dragons, we
>     don't recommend it all noted ;)). So... FEC 8/9 -> 2/3 is easy enough to
>     do, but what do I do about the modulation field in dtv_multiplex? Change
>     qpsk to 8psk, leave it as qpsk, or something else?
>     Also, I assume that my cards/drivers/MythTV have support for 8PSK in
>     them - googling would lead me to believe they are supported. I'm running
>     a Tevii S480 and Hauppauge WinTV-HVR400 under Ubuntu 12.04LTS with
>     mythbackend version: fixes/0.25 [v0.25.1-49-g65913e7].
>     Is there any way to check this before the date? Should I just relax? I'm
>     paranoid about this as I work with embedded sat systems and I know
>     making assumptions about what tuners do and don't support in their
>     drivers is dangerous....
>     Thanks
>     Andy

I don't use satellite data and I don't want to run mythtvsetup at 
present, but aren't those parameters editable in the Transports editor 
of the Channel scanner?    You could check that out, but I doubt that 
you can test anything before the start date unless you have access to 
fancy test gear.

John P

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