[linux-dvb] STB6100, STB0899 programming information?

thomas schorpp t.schorpp at gmx.de
Thu Aug 31 07:36:17 CEST 2006


Manu Abraham wrote:
> thomas schorpp wrote:
> 
>>Robert Schlabbach wrote:
>>
>>>From: "Manu Abraham" <abraham.manu at gmail.com>
>>>
>>>>Shortage of chips ? More than that, the Twinhan DVB-S2 card,
>>>>VP-1040 uses the Mantis PCI bridge, which is a new chipset as well.
>>>
>>>
>>>Not new to me ;)
>>
>>is Mantis a trademark or a manufacturer?
>>i want one but twinhan doesnt talk to me.
>>
> 
> 
> 
> Mantis is the name of a chip. It looks like a trademark. Mantis II and
> Mantis III are expected later. Never try to jump too fast into something
> that is too brand new (with any vendor, any product). Will get you into
> a lot of frustrations.

i have got used to it ;)
yes, right, and "the rev. 1.0 syndrome".

> 
> It will come out soon.
> 
> 
>>>>You can look at the STB0899 driver over here.
>>>>http://thadathil.net:8000/cgi-bin/hgwebdir.cgi/mp-stb0899
>>>
>>>
>>>Thank you very much! Now I have something work with :)))
>>
>>a *huge* thing, eheh
>>
>>
>>>
>>>>ST has been quite kind to provide help to put this driver together.
>>>>They did provide information that which was missing from the datasheets
>>>>as well, as they wanted to go for a very good driver.
>>
>>thats real nice, my excuses for bothering them.
> 
> 
> 
> ST wanted a business case to provide help. Twinhan promised them volumes
> over the next 5 years and asked them to provide help on the same due to
> the new delivery system.
> 

understandable.

> 
> 
>>>How well is your driver working in its current state? I have quite some
>>>issues with the TT DVB-S2 card using the Windows driver and software,
>>>such
>>>as sometimes it being completely unable to tune to most transponders -
>>>and
>>>I don't even know if this is only a driver bug or in fact a defective
>>>piece
>>>of hardware I got here... :(
>>
> 
> 
> As i heard, someone told me that DVB-S2 needs a better SNR like QAM256
> etc. No hands on experience there, just a word of mouth from somebody.
> 
> 
> 
>>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>>old noisy lnb, switchbox, cables? maybe some transponders need this new
>>circular polarisation too, i think older lnb's cant detect it.
>>and 8/BPSK should be as noise sensitive like 256qam on dvb-c.
>>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
> 
> 
> 
> Yep, sounds similar to what i heard.
> 
> 
> 
>>>>It requires some additional loops like checking for the Pilot symbols
>>>>(BC mode) etc Carrier Synchronization, Checking for Unique Words etc.
>>>>Hence it looks a bit complex.
>>>
>>>
>>>Glah... :(
>>
>>little disappointing, modern devices should be fully automatic and be
>>capable of blind signal aquisition. too much software-overhead here. st
>>got homework.
> 
> 
> 
> It is not the device needs more work or anything else, but it is the
> delivery system in fact. Any demod which tries to hide this will have to
> hide it in some form of a binary blob, ie, firmware. since it is part of
> the delivery system specification. I would always prefer, open source
> than a binary blob.

err, good point for oss, respectively. and so this device could be made future standard changes 
compatible by adapting Your layered driver software, ok. but expect future devices to get that way "closed", 
like the Intel CE 6210, http://www.intel.com/design/celect/demodulators/ce6210.htm , wich claimes to have 
a hardware based state machine without firmware need. the expectable dvb-s2 successor of http://www.intel.com/design/celect/demodulators/ce6313.htm could be that way, then, too.
large scale integration on chips advances always faster than software ;)

> 
> 
> Manu
> 
> 

y
tom



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