> Is there something different between the PCI and the USB parts? One > seems to tune to SBS (well mostly) and the other doesn't. I'm lost.... I installed a DVICO dual digital over the weekend and came across a few problems as well. But it is now working for me perfectly. First I describe the setup that I got to work: I am using OpenSuSE 10.1, kernel 2.6.16.21-0.13-default in an old i386 P3. The hg tree I installed according to http://www.linuxtv.org/wiki/index.php/How_to_install_DVB was from 9/9/06 : hg clone http://linuxtv.org/hg/v4l-dvb It compiled and installed without problems. I tested Chris's test tree as well and it gave some errors - so I did not bother). The scan file for Brisbane does need the +166667Hz offset. This is my scan file: # cat /usr/share/dvb/scan/dvb-t/au-Brisbane # Australia / Brisbane (Mt Coot-tha transmitters) # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy # ABC T 226500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE # Seven T 177500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE # Nine T 191791667 7MHz 3/4 NONE QAM64 8k 1/16 NONE # Ten T 219500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE # SBS T 585791667 7MHz 2/3 NONE QAM64 8k 1/8 NONE I actually used most of the time kaffeine for testing as it gives me a instant look at the picture and I can see visual artefacts direct. So I made these changes also to ~/.kde/share/apps/kaffeine/dvb-t/au-Brisbane I then generated a channels.conf file: dvbscan -a /dev/dvb/adapter2 /usr/share/dvb/scan/dvb-t/au-Brisbane > ~/.tzap/channels.conf I then edited this file and only included the channels I want (no HD at the moment...) and used it in mythtv instead of a scan to define the channels: ABC TV Brisbane:226500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:512:650:577 ABC2:226500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_3_4:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:2307:2308:578 7 Digital:177500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_2_3:FEC_2_3:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_8:HIERARCHY_NONE:1025:1026:1344 Nine Digital:191791667:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:513:660:1025 TEN Digital:219500000:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_3_4:FEC_1_2:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_16:HIERARCHY_NONE:512:650:1601 SBS DIGITAL 1:585791667:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_8:HIERARCHY_NONE:161:81:817 SBS DIGITAL 2:585791667:INVERSION_AUTO:BANDWIDTH_7_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_8:HIERARCHY_NONE:162:83:818 So this is the setup if everything works ;-) The workaround to add the offset is annoying (especially if you have other hardware at the same time that does not need this offset). But it works for me... But along the way I had a few problems: I was running a Mythtv setup with a single external USB tuner DVICO FusionHDTV DVB-T (MT352+Thomson7579) (0fe9:db11) on a Laptop for a while and everything worked as expected (with the original v4l-dvb that comes with SuSE 10.1). Then I started the installation of the Dual digital in a PC and nothing worked. SBS and Nine did not scan most of the time (sometimes Nine worked) and most other programs had a lot of visible errors and dropouts. I started to think about antenna problems (we are 40km south of MtCootha and don't have completely direct line of sight). I then connected the antenna direct to the external USB tuner and got a perfect picture on the Laptop. The same external USB tuner (and without changing anything on the antenna connection) had visible dropouts and locking problems when I connected it to the PC. So I figured that my antenna signal was marginal and the PC introduced enough noise (probably through the power supply) to push the signal over the digital edge. I then added a masthead amplifier and a splitter and suddenly everything started to work. I used a GME Kingray MHW34G (a F or FS would be probably better, but his is what I found in a nearby shop on short notice [it actually came packaged from Clipsal as 3105 MH34W)]- be sure to get the wideband version - VHF and UHF. There is also a 24 db version that might be enough). I have now a SNR above 90% on all channels (most of them are 98%). And then it was easy to figure out that I needed the +166667Hz offset for Nine and SBS. The tuning problems Damien describe look very similar to what I saw when I had a low signal - there was also a difference how the USB and the PCI tuner worked and it was never repeatable. The reason why SBS behaves so different from the others might be because SBS is the only channel in Brisbane that is on UHV. Everything else is on VHF. So your antenna setup could make a difference. If you have other devices somewhere connected to the antenna - disconnect them and see if it makes a difference. I have also seen that the PC hardware (power supply?) can make a difference. Now with a boosted signal that is strong enough the problem is not visible and the reception is perfect on the PC as well - but that might be also a source of a problem. For the antenna problem I found the DTV forum very helpful. http://www.dtvforum.info/ Go to the "Geographical Viewers Forum" and select your region. For Brisbane that would be DTV Forum Australia > Geographical Viewers Forums > Queensland > Brisbane Viewers Forum and select the "Get the best reception" topic. It is obviously best to get a good antenna installer. They have testing equipment that can give you BER and they can then tune the antenna setup to reduce the BER and get the right signal strenght on each outlet (if they can't give you a BER rate then look for a different installer...). I was really only guessing and wanted a fix fast. I was lucky and it made a huge difference (but I have not seen it in heavy rain yet :-) The only remaining problem in my setup is the IR receiver on the external USB box [DVICO FusionHDTV DVB-T (MT352+Thomson7579) (0fe9:db11)]. The IR receiver in the Dual digital works fine. With the latest hg tree it actually generates the input device and lircd seems happy enough, but I can't get any output on irw. Has anyone made this work? Gerald _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
