[linux-dvb] Smit CAM problems

Dan Lita dan.lita at sttcr.org
Thu Jun 12 19:53:38 CEST 2008

Dear Vladimir,

I took a closer look on the CI-CAM adapter from Technotrend.
There is a 3.3V voltage regulator (LM1117 DT 3.3V)

Similar, on the AD-SP400 it seems to be also a 3.3V voltage regulator (marked 1084-33PE). 
4046 board from Twinhan/Azurewave.

According to SMIT operation voltage for their modules is 4.5 to 5.5V

If in both cards the CAM takes power after these rectifiers 
you cannot have a guaranteed operation.


Vladimir Prudnikov wrote:
> Do you think SMiT will be interested in hunting for bugs in linux  
> drivers? These modules apparently work fine with any other hardware  
> (I'm sure professional ones do!)
> Regards,
> Vladimir
> On Jun 12, 2008, at 5:26 PM, Frederic CAND wrote:
>> Did you try to contact SMIT support ?
>> Vladimir Prudnikov a écrit :
>>> Didn't try Aston CAMs with mpeg4. But they do up to 12 channels of   
>>> mpeg2 perfectly well. With no problems at all. SMiTs that are for  
>>> 8  services can do only 3 to 4 for me.
>>> I think it's some kind of a driver bug because it begins working  
>>> after  reinitialisation. Doesn't get hot. I have tried to call  
>>> Aston as well  but with no success yet.
>>> Regards,
>>> Vladimir
>>> On Jun 12, 2008, at 2:56 PM, dan.lita at sttcr.org wrote:
>>>> Dear Vladimir,
>>>> I read your post on linux-dvb list. We have an Aston Viaccess   
>>>> Professional 2.15 CAM .
>>>> I read that you also use Aston CAMS.  My question is whether your   
>>>> Aston Viaccess cam can descramble H264  feeds or not?
>>>> We have tried on a PACE HDTV receiver and a Tandberg unit and it   
>>>> does not descramble the H264 video pid. (black screen)
>>>> This does not happen with Viaccess RED cam.
>>>> On older Common interface adapters from Technotrend, the one for  
>>>> TT  Premium DVB-S card, there was a jumper for 3V or 5V cam  
>>>> operation.
>>>> I assume the new CI adapter does not have such jumper. If it  
>>>> still  exist maybe it will be a good idea to switch from one  
>>>> voltage to the  other.
>>>> Another solution is to test whether it works or not for Irdeto to   
>>>> use an Alphacrypt Classic CAM which, at least in theory,  
>>>> according  to MASCOM, supports Irdeto.
>>>> The third thing is to notice whether the SMIT cam gets hot in   
>>>> operation. If it gets too hot maybe a fan similar to the one for   
>>>> graphics card must be put near the Common interface adapter.
>>>> BTW. Do you have any e-mail address from Aston? I have tried to   
>>>> contact  them but there is no e-mail address in their website.
>>>> Best regards,
>>>> Dan Lita
>>>> Vladimir Prudnikov wrote:
>>>>> Hello!
>>>>> I'm using SMIT cams to descramble channels on TT S-1500 and TT-   
>>>>> S2-3200. After some time of normal operation SMIT cams drop out   
>>>>> and  stop decrypting the stream. It needs to be removed from the  
>>>>> CI  slot  and reinserted to resume normal operation. Aston CAMs  
>>>>> have no  such  problems, but they don't support 0x652 Irdeto.
>>>>> I'm streaming with vlc. Tried many SMITs (Viaccess and Irdeto).   
>>>>> Same  problem everywhere.
>>>>> Regards,
>>>>> Vladimir
>>>>> _______________________________________________
>>>>> linux-dvb mailing list
>>>>> linux-dvb at linuxtv.org
>>>>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>> _______________________________________________
>>> linux-dvb mailing list
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>>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>> -- 
>> CAND Frederic
>> Product Manager
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