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 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? Oliver -- -------------------------------------------------------- VDR Remote Plugin available at http://www.escape-edv.de/endriss/vdr/ --------------------------------------------------------
