Re: scan/scan-s2 doesn't tune, but dvbtune does?
On Fri, 18 Dec 2009, Michael Akey wrote: I can't get the scan/scan-s2 utilities to lock any transponders (DVB-S). My test satellite is AMC1 103W, the Pentagon Channel tp. This is probably some simple user error on my part, but I can't figure it out. I have a Corotor II with polarity changed via serial command to an external IRD. C/Ku is switched by 22KHz tone, voltage is always 18V. Ku is with tone off, C with tone on. Speaking of which, is there a way to manually set the tone from the arguments on the scan utilities? I think it's a tone issue, but then again, why does attempting to scan something on both bands C and Ku (tone on, and tone off respectively) not work? I figured if it's a tone issue that only one band would work. I tried setting the FEC and even the delivery system (S1 rather than S) and it makes no difference. I could try the DVB-S2 NBC mux on that satellite too.. but I'm not sure why that would make a difference. If you folks have any other ideas, let me know. Thanks for your responses so far! Hi Mike, I overlooked your description of your Corotor and IRD earlier, and now, with poor connectivity, I can't really look up the details and match them with my experiences. I have a switch that is activated by the 22kHz signal and which used to be used for old analogue setups to select between two positions. I'm not sure if there is a discrete component like this in your setup, but if there is, is it possible for you to bypass it and get directly to the C- or Ku-band LNB? Or am I failing to do research to show me this is not possible... In any case, I'd do what I can to get directly to the LNB. Also, your mention of polarity switching is, well, alien to me. I suspect the card is expecting to use 13V or 18V to get vertical or horizontal polarisation; for circular polarisation I wouldn't know what handedness corresponds to what switching. Anyway, the 18V you say is constant, would be supplied by the horizontal polarisation. If you're able to get that 22kHz switch out of the way, and scan the Ku-band LNB directly, you ought to be able to see the same results with giving the directly-used frequency values, or subtracting 1 000 000kHz to convert your 10750MHz to the 9750MHz expected by the low-band Universal LNB local oscillator frequency -- the latter normally not generating the 22kHz signal. I don't know if this will help at all, or if it's possible, and I apologise for my ignorance about your specific dish(es?). barry bouwsma -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: scan/scan-s2 doesn't tune, but dvbtune does?
Steven Toth wrote: On Tue, Dec 15, 2009 at 4:53 AM, Lou Otway louis.ot...@tripleplay-services.com wrote: Michael Akey wrote: I can't get the scan/scan-s2 utilities to lock any transponders (DVB-S). My test satellite is AMC1 103W, the Pentagon Channel tp. This is probably some simple user error on my part, but I can't figure it out. I have a Corotor II with polarity changed via serial command to an external IRD. C/Ku is switched by 22KHz tone, voltage is always 18V. Ku is with tone off, C with tone on. Speaking of which, is there a way to manually set the tone from the arguments on the scan utilities? Here's what I've tried and the results: $ ./scan-s2 -a 0 -v -o zap -l 10750 INIT API major 5, minor 0 scanning INIT using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' initial transponder DVB-S 1210 H 2000 AUTO AUTO AUTO initial transponder DVB-S2 1210 H 2000 AUTO AUTO AUTO -- Using DVB-S tune to: 12100:h:0:2 DVB-S IF freq is 135 tuning status == 0x03 tuning status == 0x01 tuning status == 0x03 tuning status == 0x01 tuning status == 0x03 tuning status == 0x00 tuning status == 0x01 tuning status == 0x03 tuning status == 0x00 tuning status == 0x00 WARNING: tuning failed!!! tune to: 12100:h:0:2 (tuning failed) DVB-S IF freq is 135 tuning status == 0x03 tuning status == 0x01 tuning status == 0x00 tuning status == 0x00 ...snip... Same thing happens if I use just 'scan' and not 'scan-s2.' If I use dvbtune, it works though.. $ dvbtune -f 135 -p H -s 2 -c 0 -tone 0 -m Using DVB card Conexant CX24116/CX24118 tuning DVB-S to L-Band:0, Pol:H Srate=2000, 22kHz=off polling Getting frontend event FE_STATUS: polling Getting frontend event FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC Bit error rate: 0 Signal strength: 51648 SNR: 26215 FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC Signal=51648, Verror=0, SNR=26215dB, BlockErrors=0, (S|L|C|V|SY|) Signal=51776, Verror=0, SNR=26624dB, BlockErrors=0, (S|L|C|V|SY|) The tuning file 'INIT' contains only the following line: S 1210 H 2000 AUTO I'm using v4l-dvb drivers from the main repo as of about a week ago. I am running kernel 2.6.32 on Debian testing. Any help is appreciated ..and hopefully it's just a simple flub on my part! --Mike Try using a non-auto FEC and rolloff. Some devices won't accept auto for these parameters. Michael, The silicon in question doesn't do automatic FEC detection. Be sure to specify which FEC you need for the sat. If in doubt, walk through them all manually. Pilot auto detect is done in s/w was was added a long time ago. - Steve Steve et al, It would appear that it does in fact do auto FEC since I don't specify it with dvbtune and it works just fine (with both my Prof 7300 and 7301.) I think it's a tone issue, but then again, why does attempting to scan something on both bands C and Ku (tone on, and tone off respectively) not work? I figured if it's a tone issue that only one band would work. I tried setting the FEC and even the delivery system (S1 rather than S) and it makes no difference. I could try the DVB-S2 NBC mux on that satellite too.. but I'm not sure why that would make a difference. If you folks have any other ideas, let me know. Thanks for your responses so far! --Mike -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: scan/scan-s2 doesn't tune, but dvbtune does?
On Fri, Dec 18, 2009 at 2:23 PM, Michael Akey ak...@onid.orst.edu wrote: Steven Toth wrote: On Tue, Dec 15, 2009 at 4:53 AM, Lou Otway louis.ot...@tripleplay-services.com wrote: Michael Akey wrote: I can't get the scan/scan-s2 utilities to lock any transponders (DVB-S). My test satellite is AMC1 103W, the Pentagon Channel tp. This is probably some simple user error on my part, but I can't figure it out. I have a Corotor II with polarity changed via serial command to an external IRD. C/Ku is switched by 22KHz tone, voltage is always 18V. Ku is with tone off, C with tone on. Speaking of which, is there a way to manually set the tone from the arguments on the scan utilities? Here's what I've tried and the results: $ ./scan-s2 -a 0 -v -o zap -l 10750 INIT API major 5, minor 0 scanning INIT using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' initial transponder DVB-S 1210 H 2000 AUTO AUTO AUTO initial transponder DVB-S2 1210 H 2000 AUTO AUTO AUTO -- Using DVB-S tune to: 12100:h:0:2 DVB-S IF freq is 135 tuning status == 0x03 tuning status == 0x01 tuning status == 0x03 tuning status == 0x01 tuning status == 0x03 tuning status == 0x00 tuning status == 0x01 tuning status == 0x03 tuning status == 0x00 tuning status == 0x00 WARNING: tuning failed!!! tune to: 12100:h:0:2 (tuning failed) DVB-S IF freq is 135 tuning status == 0x03 tuning status == 0x01 tuning status == 0x00 tuning status == 0x00 ...snip... Same thing happens if I use just 'scan' and not 'scan-s2.' If I use dvbtune, it works though.. $ dvbtune -f 135 -p H -s 2 -c 0 -tone 0 -m Using DVB card Conexant CX24116/CX24118 tuning DVB-S to L-Band:0, Pol:H Srate=2000, 22kHz=off polling Getting frontend event FE_STATUS: polling Getting frontend event FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC Bit error rate: 0 Signal strength: 51648 SNR: 26215 FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC Signal=51648, Verror=0, SNR=26215dB, BlockErrors=0, (S|L|C|V|SY|) Signal=51776, Verror=0, SNR=26624dB, BlockErrors=0, (S|L|C|V|SY|) The tuning file 'INIT' contains only the following line: S 1210 H 2000 AUTO I'm using v4l-dvb drivers from the main repo as of about a week ago. I am running kernel 2.6.32 on Debian testing. Any help is appreciated ..and hopefully it's just a simple flub on my part! --Mike Try using a non-auto FEC and rolloff. Some devices won't accept auto for these parameters. Michael, The silicon in question doesn't do automatic FEC detection. Be sure to specify which FEC you need for the sat. If in doubt, walk through them all manually. Pilot auto detect is done in s/w was was added a long time ago. - Steve Steve et al, It would appear that it does in fact do auto FEC since I don't specify it with dvbtune and it works just fine (with both my Prof 7300 and 7301.) I think it's a tone issue, but then again, why does attempting to scan something on both bands C and Ku (tone on, and tone off respectively) not work? I figured if it's a tone issue that only one band would work. I tried setting the FEC and even the delivery system (S1 rather than S) and it makes no difference. I could try the DVB-S2 NBC mux on that satellite too.. but I'm not sure why that would make a difference. If you folks have any other ideas, let me know. Thanks for your responses so far! It doesn't do auto FEC in S2 mode, only S mode. -- Steven Toth - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: scan/scan-s2 doesn't tune, but dvbtune does?
On Mon, 14 Dec 2009, Michael Akey wrote: I can't get the scan/scan-s2 utilities to lock any transponders (DVB-S). My test satellite is AMC1 103W, the Pentagon Channel tp. This is probably some simple user error on my part, but I can't figure it out. I have a Corotor II with polarity changed via serial command to an external IRD. C/Ku is switched by 22KHz tone, voltage is always 18V. Ku is with tone off, C with tone on. I'm afraid that I have a european background into which your use does not fit my expectations. What I expect is that the voltage will be determined by what sort of polarisation you are trying to receive (your fixed 18V would correspond to horizontally polarised transponders) whilst the 22kHz tone would be used to select within the Ku band between the low and high band (switchover between a universal LNB's 9750 and 10 600 MHz IF at actual frequency near 11 700 MHz). Variants thereupon may depend on older installations, and while C band does exist, I've never personally bothered to use it or play with LNBs and such to learn those details. With this background, I'll attempt to interpret what I see below. $ ./scan-s2 -a 0 -v -o zap -l 10750 INIT initial transponder DVB-S 1210 H 2000 AUTO AUTO AUTO initial transponder DVB-S2 1210 H 2000 AUTO AUTO AUTO -- Using DVB-S tune to: 12100:h:0:2 DVB-S IF freq is 135 This frequency would normally be tuned with 22kHz tone on, with a traditional Universal LNB. I can't be arsed to look up the particular bird on which your transponder lies to get its particulars (frequency 12100h, SR 2 I will take from your parameters), but if this utility is selecting the 22kHz switching signal based on the frequency, it may assume that 12100 needs this tone, in spite of your specifying the LO intermediate frequency, which apparently you use to select between Ku band and when active, C band. If I use dvbtune, it works though.. $ dvbtune -f 135 -p H -s 2 -c 0 -tone 0 -m tuning DVB-S to L-Band:0, Pol:H Srate=2000, 22kHz=off Here you're tuning directly to the IF frequency which the above utility determines from your specified LO value and desired tuning frequency. I'd look at the source code for the above utilities which fail to see if it's deciding 22kHz tone based on the tuned frequencies. If so, and there aren't options to work around this as you can with directly specifying the IF to `dvbtune' as above, then it may work to massage the input values you feed to `scan' not to be the actual frequencies. The tuning file 'INIT' contains only the following line: S 1210 H 2000 AUTO If this corresponds to 1 350 000 kHz IF, and you faked that your LNB had an IF of 9750 MHz, the corresponding ``tuning frequency'' would be 11 100 MHz, or 1110 H in the above line. Horizontal polarisation corresponds to your 18V nicely. Otherwise it's a particular configuration which would be alien to me with my limited hands-on experience. Note that what you get back from parsing the NIT tables when tuning the above transponder at the hacked value would need to be again adjusted similarly. But I don't know what the frequencies and bands are that are used by this bird, nor do I know what sort of consumer equipment is used outside the part of the world where I learned my knowledge of the trade. Anyway, that's how I interpret your results. I'd be happy if someone with more intimate knowledge of those utilities, their options, and other setups, could give you a one-line cure for your woes -- otherwise I hope I've provided a bit of background to help you better understand what may be going on. -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: scan/scan-s2 doesn't tune, but dvbtune does?
Michael Akey wrote: I can't get the scan/scan-s2 utilities to lock any transponders (DVB-S). My test satellite is AMC1 103W, the Pentagon Channel tp. This is probably some simple user error on my part, but I can't figure it out. I have a Corotor II with polarity changed via serial command to an external IRD. C/Ku is switched by 22KHz tone, voltage is always 18V. Ku is with tone off, C with tone on. Speaking of which, is there a way to manually set the tone from the arguments on the scan utilities? Here's what I've tried and the results: $ ./scan-s2 -a 0 -v -o zap -l 10750 INIT API major 5, minor 0 scanning INIT using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' initial transponder DVB-S 1210 H 2000 AUTO AUTO AUTO initial transponder DVB-S2 1210 H 2000 AUTO AUTO AUTO -- Using DVB-S tune to: 12100:h:0:2 DVB-S IF freq is 135 tuning status == 0x03 tuning status == 0x01 tuning status == 0x03 tuning status == 0x01 tuning status == 0x03 tuning status == 0x00 tuning status == 0x01 tuning status == 0x03 tuning status == 0x00 tuning status == 0x00 WARNING: tuning failed!!! tune to: 12100:h:0:2 (tuning failed) DVB-S IF freq is 135 tuning status == 0x03 tuning status == 0x01 tuning status == 0x00 tuning status == 0x00 ...snip... Same thing happens if I use just 'scan' and not 'scan-s2.' If I use dvbtune, it works though.. $ dvbtune -f 135 -p H -s 2 -c 0 -tone 0 -m Using DVB card Conexant CX24116/CX24118 tuning DVB-S to L-Band:0, Pol:H Srate=2000, 22kHz=off polling Getting frontend event FE_STATUS: polling Getting frontend event FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC Bit error rate: 0 Signal strength: 51648 SNR: 26215 FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI FE_HAS_SYNC Signal=51648, Verror=0, SNR=26215dB, BlockErrors=0, (S|L|C|V|SY|) Signal=51776, Verror=0, SNR=26624dB, BlockErrors=0, (S|L|C|V|SY|) The tuning file 'INIT' contains only the following line: S 1210 H 2000 AUTO I'm using v4l-dvb drivers from the main repo as of about a week ago. I am running kernel 2.6.32 on Debian testing. Any help is appreciated ..and hopefully it's just a simple flub on my part! --Mike Try using a non-auto FEC and rolloff. Some devices won't accept auto for these parameters. Cheers, Lou -- To unsubscribe from this list: send the line unsubscribe linux-media in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
