[mythtv-users] BBC HD mux switching to DVBS2

[Robert Longbottom]

On 03/06/2011 15:18, Another Sillyname wrote:
> On 03/06/2011, Andre<mythtv-list at dinkum.org.uk>  wrote:
>>
>> On 3 Jun 2011, at 14:00, Another Sillyname wrote:
>>
>>> On 03/06/2011, Alasdair Macdonald<wewalkforonereason at gmail.com>  wrote:
>>>> Here's the blog item:
>>>>
>>>> http://www.bbc.co.uk/blogs/bbcinternet/2011/06/changes_to_bbc_hd_channels_on.html
>>>>
>>>> and the key technical data:
>>>>
>>>> Satellite: Astra 2D tp.50
>>>> Frequency: 10,847MHz (vertical polarity)
>>>> Modulation: DVB-S2, QPSK
>>>> Symbol Rate: 23.0
>>>> FEC: 8/9
>>>>
>>>>
>>>> On 3 June 2011 13:28, Andre<mythtv-list at dinkum.org.uk>  wrote:
>>>>>
>>>>> On 3 Jun 2011, at 13:25, Richard Morton wrote:
>>>>>
>>>>>> Are you saying this has happened already?
>>>>>
>>>>> Er no...
>>>>>
>>>>>>
>>>>>> The UK BBC mux used for BBC One HD, BBC HD and ITV HD is switching
>>>>>> modulation to DVBS2 on the 6th April.
>>>>>
>>>>> Oops, sorry, my mistake, should have just linked to a news blog
>>>>> somewhere!
>>>>>
>>>>> Try 6th June, this weekend.
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>>>>
>>> So is this a frequency change and a DVB-S2 change?
>>>
>>> The thread title inferred it was just a DVB-S2 change.
>>
>> No frequency change, there could be some subtle center frequency change
>> depending on what the muxes either side are carrying but nominally it's been
>> 10847Mhz for as long as I know of.
>>
>>> If it's a frequency change as well please ignore my previous posting.
>>
>> I'm concerned that the FEC is changing too, just changing the DVBS/DVBS2
>> property may not be enough, maybe changing the modulation will be enough to
>> be able to select the mux for solo retuning which does work fine.
>>
>> Odd that they are not switching to 8PSK, they are not really "making best
>> use of this scarce resource", I guess the rumours about some significantly
>> sold Sky HD or Freesat HD box not working with 8PSK must be true, maybe it's
>> the old Thompson Sky HD boxes that they are actively replacing right now.
>>
>>
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>>
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>>
> Sorry my error
>
> Looking at this page....
>
> http://www.bbc.co.uk/reception/info/sat_frequencies.shtml
>
> you can see why I read the frequency as 10788000, not a well designed
> information page IMHO, putting the frequencies first then a break,
> then what they refer to.
>
> In which case my previous command line should work if people replace
> 10788000 with 10847000.  I take your point re the FEC but I think
> mines set to auto IIRC, I'll check tonight and see if all the changes
> can be made from a command line to save people doing a rescan.

Yeah, not having to recan would be good, especially if I have to do a 
full rescan.  A single transponder is manageable.  I'm more than happy 
to have a bit of a hack around in mysql instead.  For auto fec do I just 
need to put "auto" in the fec column.  The only ones I've got at the 
minute are:

mysql> select distinct fec from dtv_multiplex;
+------+
| fec  |
+------+
| 5/6  |
| 2/3  |
+------+
2 rows in set (0.00 sec)

and the BBC HD transponder is using 5/6.

Based on Alasdair's link and the info he copied in above it looks like 
modulation, fec and symbol rate are changing from what I currently have 
in my db...

Cheers,
Robert.