[linux-dvb] Re: VES1820.c question

[Marko Kenttälä <marko.kenttala@teraflops.com>]

At 18:46 8.10.2002 +0300, Dennis Noordsij wrote:
>This is a question in response to Marko Kenttälä's patch for VES1820.c to
>allow QAM_128 tuning using a Siemens DVB-C card (QAM_128 is needed for
>Finnish channels).
>
>Specifically these lines (NEWSTRUCT branch by the way):
>
>246 QAM_SETTING QAM_Values[] = {
>247         {QAM_16 ,  16, 145, 164, 162, 145},
>248         {QAM_32 ,  32, 150, 120, 116, 150},
>249         {QAM_64 ,  64, 106,  70,  67, 106},
>250         {QAM_128, 128, 126,  54,  52, 126},
>251         {QAM_256, 256, 107,  38,  35, 107}
>252 };

Sorry I don't have an answer for your question, I just used the values in 
the datasheets and it started working :)

Last night I tried to get NEWSTRUCT driver to work with no luck. With 
"oldstruct" my Siemens DVB-C card QAM64 channels tuned with first try and 
QAM128 channels didn't tune on the first try but tuned in fe_zigzag() 
function before it even started zigzagging.

Now it seems NEWSTRUCT uses different method for tuning and it doesn't tune 
at all to QAM128 channels. I tried to change the order of register writes 
and added reset in some places but it didn't help. I'll have to do further 
debug of the differences between oldstruct and newstruct tuning and 
hopefully I'll find a solution. Are there any changes to firmware code in 
NEWSTRUCT?

Marko Kenttälä, Software Engineer
TERAFLOPS Ltd., Member of Elektrobit Group
Mobile: +358407501832, Fax: +35832619255
http://www.teraflops.com, http://www.elektrobit.com



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