[mythtv] Ticket #1049: DVBSignalMonitor needs to be able to monitor NIT/SDT

Yeasah Pell yeasah at schwide.com
Sat Jun 10 14:22:14 UTC 2006


Rudy Zijlstra wrote:

>Daniel Kristjansson wrote:
>
>  
>
>>On Wed, 2006-06-07 at 08:50 -0400, Mark Buechler wrote:
>> 
>>
>>    
>>
>>>It was actually the dst based Twinhan cards I had the most trouble
>>>with. In correction, the Genpix 8psk module behaves like the Nexus in
>>>that it works well with rotors and tuning.
>>>Once the new DiSEqC stuff goes in, within the new tuning process after
>>>the rotor is estimated to be at its desired location, and the tuing
>>>code retunes, I think we should retune every few seconds until a lock
>>>is gotten. Given how the dst based cards behave, if we don't retune
>>>several times then we're very highly dependant on rotor movement speed
>>>estimates. 
>>>   
>>>
>>>      
>>>
>>I can move the retune stuff to the signal monitor. This is much cleaner
>>than keeping the code in TVRec, and should allow us to only do the
>>retune when we don't have a lock on the proper multiplex.
>> 
>>
>> 
>>
>>    
>>
>Please do. last night i upgraded to current SVN (10180). I could no 
>longer tune my budget DVB-S card. Reverted this morning to 10131 and 
>tuning was OK. When going to 10132 i loose tuning on the card and can 
>only watch services on the already tuned TS.
>
>Cheers,
>
>Rudy
>
>  
>
Actually this is probably due to a bug in libs/libmythtv/dvbchannel.cpp 
that I fixed last night, which was unmasked recently by the 
intramultiplex changing support (which is great, thanks!)

The problem is that dvbchannel.cpp gives a band of +/-500000 when 
considering if the two frequencies are equal, but DVB-S frequencies are 
in kHz, so it should be 500 for DVB-S or DVB-S2 -- otherwise it has a 
band of 500MHz when comparing frequencies, so it doesn't do a lot of 
tuning requests. :-) I have a proper fix in my diseqc/dvb-s patch, but 
if you want to workaround quickly, just change that one line's value 
from 500000 to 500 for now.

I think there may be other areas where the kHz/Hz confusion comes in, 
I've definitely spotted places in the GUI anyway (when you're putting in 
the tuned scan parameters for example, as I recall the help text says 
Hz, but that's wrong for DVB-S)

/y


More information about the mythtv-dev mailing list