Oliver Endriss wrote: > Klaus Schmidinger wrote: > >>Full featured DVB cards (Siemens/Technotrend AV7110 design) >>apparently have trouble with receiving channels at very low >>symbol rates. > > > Rev 1.6 cards (Grundig tuner) are known to have trouble with low symbol > rates. Never heard about problems with other revisions. > > >>An example is >> >> TVS Teleport Bonn;DMV:11535:vC34:S1.0W:5632:308+8190:256=eng,257=eng:0:2:1:65535:1:0 >> >>with a symbol rate of 5632 (that transponder isn't always on, though). >> >>My FF DVB card can't receive this channel, so I have to receive it >>with a budget card, which is able to handle this symbol rate. >> >>In order to automate this I tried getting the dvb_frontend_info >>and checked its symbol_rate_min, hoping that I could use this >>to find out whether a given device could receive a channel with >>a given symbol rate. >> >>Unfortunately both my FF card and my budget card report the same >>minimum symbol rate: >> >> name Alps BSRV2 >> type 0 >> frequency_min 950000 >> frequency_max 2150000 >> frequency_stepsize 250 >> frequency_tolerance 29500 >> symbol_rate_min 1000000 >> symbol_rate_max 45000000 >> symbol_rate_tolerance 0 >> notifier_delay 50 >> caps 0x000006AF >> >> name STV0299/TSA5059/SL1935 based >> type 0 >> frequency_min 950000 >> frequency_max 2150000 >> frequency_stepsize 125 >> frequency_tolerance 44000 >> symbol_rate_min 1000000 >> symbol_rate_max 45000000 >> symbol_rate_tolerance 500 >> notifier_delay 0 >> caps 0x400006AF >> >>So I'm afraid I can't use this to make that decision. >> >>Is there anything else I could use, or do I just have to >>check for the existence of a video and audio device (which >>indicates that there is an MPEG decoder) and in that case >>refuse to switch to a channel with a symbol rate of, say, >>less than 10000 (in VDR's channels.conf notation)? > > > Either symbol_rate_min is wrong for your FF card (Rev 1.3?) or the Yes, it's a Rev 1.3 FuSi card (sorry, I forgot to mention that). Note that I'm using the DVB driver on kernel 2.4. However, I didn't see anything in the dvb-kernel source that would indicate that something has been fixed in that area since the old driver. > driver is broken for low-symbol rates. > Anyway, we have to fix the driver. > > Is there any low-symbol-rate FTA channel on 19.2E or 13E? I didn't find one on either of these positions, but there is one on S28.5E: ManToVa Puntosat:12546:vC34:S28.5E:2893:512:513:0:0:1:0:0:0 I just tried tuning to this one with my FF card and got no picture or sound. With my budget card I can receive it. Klaus
