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

P. van Gaans w3ird_n3rd at gmx.net
Sat Feb 16 01:20:27 CET 2008


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.
>>>
>>> _______________________________________________
>>> linux-dvb mailing list
>>> linux-dvb at linuxtv.org
>>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>>   
> 
> 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.
> 
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> 

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.



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