[mythtv-users] Missing channels from Astra 28.2E

Another Sillyname anothersname at googlemail.com
Mon May 10 14:34:30 UTC 2010


On 10 May 2010 11:22, Chris Dennis <cgdennis at btinternet.com> wrote:
> 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
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>

Have you tried plugging in and old $ky box to see if it gets reception
of the missing channels?  It'll at least let you know if it's a fault
with the dish/LNB/alignment.

Regards


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