Hello All, Maybe I have the answer: I also had problems with switches and LNBs which did not want to work properly. Behind 1 receiver it worked properly, but behind another 2 different DVB-S PCI cards, it just failed. I never suspected the LNB/Switch setup, because it worked behind another receiver. But, In the end it turned out that there was 1 LNB in my setup that caused all the trouble, that LNB refused to cooperate with the switches and other LNBs, when a DVB-S PCI card was used (both Technisat Skystar 1CI, and TT-S1500). Once switched to this LNB, the complete setup failed to work from that moment on. I could never switch back to 1 of the previous LNBs, but the last (buggy) LNB still worked if I switched back to it. So, my advice is to start with 1 LNB behind a switch, once it works, add another one, check if both LNBs still works, if so, add another LNB and so on. Maybe you end up, just like me, with 1 LNB that destroys the complete behavior. So, my 3 TT-S1500s are properly working here now with MythTv and DiseqC switches with 4 LNBs per card/switch. So, it _can_ work... Good luck! Kind Regards, Remy 2008/2/20, P. van Gaans <w3ird_n3rd@xxxxxxx>: > 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. > >>>>>>>> > >>>>>>>> _______________________________________________ > >>>>>>>> linux-dvb mailing list > >>>>>>>> linux-dvb@xxxxxxxxxxx > >>>>>>>> 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. > >>>>>> > >>>>>> _______________________________________________ > >>>>>> linux-dvb mailing list > >>>>>> linux-dvb@xxxxxxxxxxx > >>>>>> 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@xxxxxxxxxxx > >>>> 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. > >> > >> _______________________________________________ > >> linux-dvb mailing list > >> linux-dvb@xxxxxxxxxxx > >> 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. > > > _______________________________________________ > linux-dvb mailing list > linux-dvb@xxxxxxxxxxx > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb > _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
