Klaus Schmidinger wrote: > 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. Sorry, I can only receive 13E and 19.2E here. Thanks to Wolfgang I found some FTA radio stations on Hotbird 6. I did some tests using BBC WS English;BBC WS:11131:vC34:S13.0E:5630:0:457=eng:0:0:5003:318:3801:0 Test results: ALPS BSRU6 (old Nova-S) ok ALPS BSRU6 (FF rev. 2.1): ok Grundig 29504-451 (Activy budget GR) failed [1] ALPS BSRV2 (FF rev. 1.3) failed [2] [1] as expected, tuner supports 12..30 Msymbols/s only [2] tuner supports 1..45 Msymbols/s Imho there is a bug in the ves1x93 driver for low symbol rates. Unfortunately there is no information about 1893 register programming. Oliver -- -------------------------------------------------------- VDR Remote Plugin available at http://www.escape-edv.de/endriss/vdr/ --------------------------------------------------------
