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

Andy Sheen sheen.andy at googlemail.com
Wed Sep 5 21:28:58 UTC 2012

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).



On 4 September 2012 23:26, Andy Sheen <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
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