[mythtv-users] Missing channels from Astra 28.2E

Chris Dennis cgdennis at btinternet.com
Mon May 10 10:22:48 UTC 2010


Chris Dennis wrote:
> Another Sillyname wrote:
>> On 9 May 2010 18:48, Chris Dennis <cgdennis at btinternet.com> wrote:
>>> Hello MythTV people
>>>
>>> This is a problem which I've had for a year or more, but I haven't 
>>> had time
>>> until now to investigate it fully.
>>>
>>> Basically, my list of channels is incomplete, whether I use MythTV's
>>> scanning, or DVB-utils' 'scan' command.
>>>
>>> I'm using a Hauppauge Nova-S-Plus card, which shows up in lspci as:
>>>  00:08.2 Multimedia controller: Conexant Systems, Inc. CX23880/1/2/3
>>>   PCI Video and Audio Decoder [MPEG Port] (rev 05)
>>>
>>> The output of this command
>>>
>>>  scan -a 0 -x -1 -t 7 -U -o zap -l UNIVERSAL ./Astra-28.2E
>>>
>>> when ./Astra-28.2E contains this
>>>
>>>  S 10773000 H 22000000 5/6
>>>
>>> is this (heavily edited)
>>>
>>>  scanning ./Astra-28.2E
>>>  using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>>>  initial transponder 10773000 H 22000000 5
>>>  >>> tune to: 10773:h:0:22000
>>>  DVB-S IF freq is 1023000
>>>  0x0000 0x18af: pmt_pid 0x0000 BSkyB -- BBC THREE (not running)
>>>  0x0000 0x18bb: pmt_pid 0x0101 BSkyB -- BBC 1 NI (running)
>>>  0x0000 0x18bf: pmt_pid 0x010b BSkyB -- FIVE (running)
>>>  0x0000 0x189d: pmt_pid 0x0100 BSkyB -- BBC 1 London (running)
>>>  0x0000 0x189e: pmt_pid 0x0102 BSkyB -- BBC 2 England (running)
>>>  0x0000 0x18a2: pmt_pid 0x0104 BSkyB -- ETV (running)
>>>  0x0000 0x18a5: pmt_pid 0x0000 BSkyB -- BBC TES 2 (not running)
>>>  0x0000 0x18ab: pmt_pid 0x0103 BSkyB -- BBC TES 3 (running)
>>>  0x0000 0x18ac: pmt_pid 0x0000 BSkyB -- BBC FOUR (not running)
>>>  0x0000 0x18ad: pmt_pid 0x0106 BSkyB -- CBBC Channel (running)
>>>  0x0000 0x18ae: pmt_pid 0x0105 BSkyB -- CBeebies (running)
>>>  Network Name 'ASTRA'
>>>  ... [lots of lines snipped]
>>>  >>> tune to: 11953:h:0:27500 (tuning failed)
>>>  DVB-S IF freq is 1353500
>>>  WARNING: >>> tuning failed!!!
>>>  ... [lots more lines snipped]
>>>
>>> In other words, it finds some channels and not others.  Specifically, 
>>> the
>>> information on pages such as
>>>  http://www.lyngsat.com/astra2b.html
>>> and
>>>  http://www.digital-kaos.co.uk/forums/f39/bbc-1-2-missing-40088/
>>> suggests that BBC Radio 4 (and others) should be available on
>>> 11953:h:027500, but I've never been able to get it.
>>>
>>> I can get other radio stations, such as BBC R5L on 10802:h:0:22000.
>>>
>>> Has anyone else experienced this?
>>>
>>> Is it likely to be the fault of the tuner card, or the LNB, or the 
>>> direction
>>> the dish is pointing in?
>>>
>>> cheers
>>>
>>> Chris
>>> -- 
>>> Chris Dennis                                  cgdennis at btinternet.com
>>> Fordingbridge, Hampshire, UK
>>> _______________________________________________
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>
>> Try the following....
>>
>> 11817 freq V polarity 27500 symrate
>> 11953 freq H polarity 27500 symrate
>>
>> See what you get
> 
> I got this:
> 
> scanning ./AstraTest
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> initial transponder 11817000 V 27500000 2
> initial transponder 11953000 H 27500000 2
>  >>> tune to: 11817:v:0:27500
> DVB-S IF freq is 1217000
> WARNING: >>> tuning failed!!!
>  >>> tune to: 11817:v:0:27500 (tuning failed)
> DVB-S IF freq is 1217000
> WARNING: >>> tuning failed!!!
>  >>> tune to: 11953:h:0:27500
> DVB-S IF freq is 1353000
> WARNING: >>> tuning failed!!!
>  >>> tune to: 11953:h:0:27500 (tuning failed)
> DVB-S IF freq is 1353000
> WARNING: >>> tuning failed!!!
> ERROR: initial tuning failed
> dumping lists (0 services)
> Done.
> 

I've also tried manually entering the multiplex and channel details into 
the MythTV database, but the channel that should be Radio 4 just gets 
'No lock (l___)'.

Are there parameters to the cx88 modules that can be tuned to improve 
reception?  (I can see that there are many parameters to modules such as 
cx88xx, cx8800, cx8802, cx88_dvb etc., but I don't know which ones to tweak)

cheers

Chris

-- 
Chris Dennis                                  cgdennis at btinternet.com
Fordingbridge, Hampshire, UK


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