[linux-dvb] DiSEqC trouble with TT S-1500

P. van Gaans w3ird_n3rd at gmx.net
Wed Feb 20 12:21:11 CET 2008


On 02/20/2008 10:48 AM, Doru Marin wrote:
> P. van Gaans wrote:
>> On 02/18/2008 02:04 PM, Doru Marin wrote:
>>  
>>> P. van Gaans wrote:
>>>    
>>>> On 02/16/2008 01:20 AM, P. van Gaans wrote:
>>>>  
>>>>      
>>>>> On 02/13/2008 09:21 PM, P. van Gaans wrote:
>>>>>           
>>>>>> On 02/13/2008 03:01 PM, Doru Marin wrote:
>>>>>>               
>>>>>>> Hi,
>>>>>>>
>>>>>>> Can you explain how you select those 4 positions ? DiSEqC 
>>>>>>> commands or tone/voltage changes ?
>>>>>>> Also can you determine the input type of those positions (Hi/Low, 
>>>>>>> H/V, etc) ? A scenario to see when and why that happens, would be 
>>>>>>> more useful.
>>>>>>>
>>>>>>> P. van Gaans wrote:
>>>>>>>                   
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> I've got a Technotrend S-1500 (if it matters: I use it with 
>>>>>>>> Kaffeine 0.8.3). It works mostly fine, but there's a strange 
>>>>>>>> problem. With my Spaun 4/1 DiSEqC switch (they cost approx 25-40 
>>>>>>>> euro), I can only switch without trouble to position 1 and 2. If 
>>>>>>>> I tune directly to position 3 it won't lock.
>>>>>>>>
>>>>>>>> However, if I first tune to a channel on position 1 or 2 and try 
>>>>>>>> a channel on position 3 after that, it will work. Position 4 
>>>>>>>> however is completely unreachable.
>>>>>>>>
>>>>>>>> On a standalone receiver, there's no trouble with the same cable.
>>>>>>>>
>>>>>>>> Now Spaun is a really expensive and respected brand. So their 
>>>>>>>> switches possibly work in a different way, because a cheap 
>>>>>>>> Maximum 4/1 switch works perfectly with the S-1500. Position 1, 
>>>>>>>> 2, 3 and 4 all work perfectly. I also did some "dry testing" 
>>>>>>>> indoors and it looks like a 7 euro Satconn 4/1 switch would also 
>>>>>>>> work fine, but a 17 euro Axing SPU 41-02 probably won't.
>>>>>>>>
>>>>>>>> I'm guessing this could be solved in stv0299.c but I'm not much 
>>>>>>>> of an expert. I took a look at the code but I'm not really sure 
>>>>>>>> what to do.
>>>>>>>>
>>>>>>>> _______________________________________________
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>>>>>>>>                           
>>>>>> I select them with Kaffeine. Hi/low and H/V doesn't matter. I 
>>>>>> tried upgrading to Kaffeine 0.8.5 but that doesn't make a 
>>>>>> difference. The "scan" application has the same issues.
>>>>>>
>>>>>> _______________________________________________
>>>>>> linux-dvb mailing list
>>>>>> linux-dvb at linuxtv.org
>>>>>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>>>>>
>>>>>>                 
>>>>> Nobody any ideas? If not, does anybody have some idea what the 
>>>>> difference between position 1+2, pos 3 and pos 4 could be? I was 
>>>>> thinking 1 and 2 might be working because of toneburst, but I don't 
>>>>> think Kaffeine uses such a signal and that doesn't explain why pos 
>>>>> 3 works if first tuning to 1 or 2 and 4 doesn't work at all.
>>>>>
>>>>>             
>>>> I've figured out a bit more. If I tune directly to postion 3, I get pos
>>>> 1. Whenever I tune to pos 4, I get pos 2.
>>>>
>>>> I'll also ask people from Kaffeine as I'm not sure if the problem is 
>>>> in the application, driver or somewhere else.
>>>>
>>>> _______________________________________________
>>>> linux-dvb mailing list
>>>> linux-dvb at linuxtv.org
>>>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>>>         
>>> Hi,
>>>
>>> Strange scenario. You're not saying anything about input types and 
>>> the switch type. Are you sure that are properly connected ? How the 
>>> switch inputs are marked and from where you got the input signals ? 
>>> Please elaborate, if you want a proper answer.
>>> I suggest to play with 'scandvb' from dvb-apps package instead of 
>>> Kaffeine. Look into scanning results if the scanned channels match 
>>> with what you wished to have on those positions.
>>>
>>>     
>> Hi,
>>
>> What do you mean with input type?
>>
>> Anyway, this is my config:
>>
>> Visiosat Bisat G3C for 19.2/28.2/23.5 + Triax 54cm for Hotbird
>> 4 quad LNBs
>>
>> Spaun SAR 411F:
>> A = Astra 19.2
>> B = Astra 28.2/Eurobird1
>> C = Astra 23.5
>> D = Hotbird
>>
>> Maximum 4/1:
>> A = Astra 19.2
>> B = Astra 28.2/Eurobird1
>> C = Astra 23.5
>> D = Hotbird
>>
>> All works fine on a standalone so it is connected correctly.
>>
>> _______________________________________________
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>> linux-dvb at linuxtv.org
>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>   
> Hi,
> 
> Ok, If I understood you correctly, you're talking about only plain 
> DiSEqC switch, with no polarity/tone management. Polarity and tone 
> switching are done by LNB's.
> Recently, I found a branded switch, which was unable to decode a DiSEqC 
> commands while polarity was on horizontal (18V).
> Maybe is the same situation, maybe not. That's why I asked you to check 
> the polarity/tone settings of the channels while switching to a 
> different channel on a different satellite.
> 

That's right, no multiswitches or something like that. The last time I 
checked (a while ago), the Spaun was still completely working on my 
standalones. But as I figured out yesterday, something is wrong with 
that now. The standalones don't see D (Hotbird) anymore either. So I'm 
first going to fix that.

Trying to switch from Flaunt (V) to 4fun.tv (V) doesn't work either, so 
it's not the same problem I guess.



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