Re: Re : [linux-dvb] Technotrend Budget S2-3200 Digital artefacts on HDchannels

[Manu Abraham <abraham.manu@gmail.com>]

Manu wrote:
> Le 28.01.2009 07:03:00, n37 a écrit :
>> On Wed, Jan 28, 2009 at 1:02 AM, Manu Abraham 
>> <abraham.manu@gmail.com>
>> wrote:
>>> Alex Betis wrote:
>>>> On Tue, Jan 27, 2009 at 11:27 PM, Manu Abraham
>> <abraham.manu@gmail.com>wrote:
>>>>> Alex Betis wrote:
>>>>>> On Tue, Jan 27, 2009 at 10:14 PM, Manu Abraham
>> <abraham.manu@gmail.com
>>>>>> wrote:
>>>>>>
>>>>>>> Alex Betis wrote:
>>>>>>>>> It won't. All you will manage to do is burn your demodulator,
>> if you
>>>>>>> happen
>>>>>>>>> to
>>>>>>>>> be that lucky one, with that change. At least a few people
>> have burned
>>>>>>>>> demodulators by now, from what i do see.
>>>>>>>>>
>>>>>>>> What are the symptoms of burned demodulator? How can someone
>> know if
>>>>> its
>>>>>>>> still ok?
>>>>>>> The first time i saw it was that the DVB-S2 demod was returning
>> no
>>>>>>> carrier. After some time it was stating timing error for DVB-S
>> as
>>>>>>> well. Finally it all ended up with demodulator I2C ACK failure,
>> and
>>>>>>> eventually a frozen machine after a week (my test boxes run
>> throughout)
>>>>>>> Touching the demodulator, i happened to have almost a burned
>> finger.
>>>>>>> I wanted to know whether this was a single case. During the
>>>>>>> development phase, i did mention it to Julian about this, since
>> he
>>>>>>> was the very first person to test for the stb0899 driver. He
>>>>>>> jovially laughed about a burned demodulator and a finger, left
>> his
>>>>>>> machine on after i did some tests on it. Eventually he too had
>> the
>>>>>>> same results. Finally we changed cards.
>>>>>> What frequency did you use to burn it?
>>>>> It was a long time back, don't remember. It has nothing to do 
>> with
>>>>> the frequency of the transponder, but just the master clock. You
>> can
>>>>> run it to a maximum of 108Mhz overclocked, 99Mhz to be safe and
>>>>> sufficient.
>>>>>
>>>>>
>>>>>> I didn't see anyone here on the list that reported a hardware
>> failure so
>>>>>> far.
>>>>> May god help you. I didn't know that you knew more than the
>>>>> demodulator manufacturer !
>>>> Please speak for yourself, I never said I know more than a
>> manufacturer.
>>>> I wrote a fact.
>>>> Intel also rate their chips and everybody overclocks them to crazy
>> ratings.
>>>>
>>>>>
>>>>>> By the way, Igor returned the chip frequency for 27.5 channels 
>> to
>> 99MHz
>>>>> and
>>>>>> raised it a bit for higher SR channels, so there is no danger 
>> for
>>>>> majority
>>>>>> of the users.
>>>>> Ok, be happy with his change and keep quiet. 135Mhz is out of
>> bounds
>>>>> of the hardware specification. You are on your own. Raising the
>>>>> master clock, doesn't bring you any advantage.
>>>> Did someone overclock you as well?
>>>> Chill out!
>>>> It would be better if you'll be more productive instead of 
>> quieting
>> people
>>>> who try to help.
>>>>
>>>> Again, I'm commenting facts. As I saw from the reports the
>> overclock seems
>>>> to help with the problem.
>>>>
>>>>
>>>>> From your statement (and the patch), it is clearly evident that
>> you
>>>>> don't understand head or tail what you are stating or patched the
>>>>> code for:
>>>> So be so kind, and add comments to the code you write so everybody
>> could
>>>> find its head and tail when trying to fix bugs.
>>>> It is clearly evident that you don't really want that someone else
>> will
>>>> understand your code.
>>>>
>>>> Again, facts are that the patch help and make the device more
>> stable for
>>>> DVB-S channels.
>>>>
>>>>
>>>>
>>>> Oh well, I hate that I had to get so low with my message, but
>> that's that
>>>> happen when someone try to align with your expressions.
>>>> In case you didn't know, you're not alone in the universe, get 
>> used
>> to it.
>>> I should be the one who should be kicked for trying to help you.
>>>
>>> _______________________________________________
>>> linux-dvb users mailing list
>>> For V4L/DVB development, please use instead
>> linux-media@vger.kernel.org
>>> linux-dvb@linuxtv.org
>>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>>
>> I am writing just to share my experience with tt3200 drivers. The
>> following are just observations about the behavior of my card:
>>
>> 1. The card has never tuned reliably with the v4l-dvb s2api driver or
>> the multiproto driver. This concerns not just high rate dvb-s2
>> transponders but also some plain dvb-s transponders as well. And this
>> is not just random hiccups but consistent behavior. German Eurosport 
>> @
>> 19.2e is a prime example.
>> 2. When Igor first increased the high clock to 135MHz, there was a
>> marked improvement. All of the tuning issues were gone. However I am
>> using a rotor and the higher clock rate somehow broke rotor control.
>> 3. Next Igor backed down the high clock to 99MHz and introduced a
>> "very high clock" of 135MHz. Tuning went back to unreliable. Rotor
>> control was ok.
>> 4. I bought a hvr4000. And now all of my issues are gone.
> 
> I am thinking about it also :(

You are free to choose whatever hardware you want.

In your last post you wrote, you wanted some fixes to get going. Now
when there are fixes to test, you don't want to test .. ??


Regards,
Manu