IMHO, the only correct way to scan for channels is: - get an authoritative list of frequencies (I have compiled a list from various sources which is included below. 2 channels have been moved by 1MHz to line things up a bit better. I have included both the old and the new frequencies in my list). This will change 'from time to time' but probably not for another few years - scan each frequency for a signal. Use AUTO where possible. Rely on the hardware to scan the +/-125kHz. If the hardware does not support any of these then you must try each one in turn. If a signal is found, it is normally locked in < 1 second so doing a full scan it not a problem. scan/dvbscan is slow and takes ~4min but I have written my own which does a full scan in ~1min - any TS which is found can be read to get the transmitter info and perhaps info about other transmitters. Don't trust this data however because nothing is forcing it to be correct. If you can read the TS then you have the tune data already (this may well be contrary to 'The receiver should check the Transmission Parameter Signaling' but I don't exactly know what that statement means) The only thing you can't control is the polarity. This is a hardware issue because your antenna must be oriented in the correct way. Normally all channels in a region have the same polarity so this should not be a problem. Where possible, the digital channels are allocated in such a way that your existing analog antenna will work fine for digital. It is the ACMA which controls all of this. It can be hard to find but there is a lot of documentation available. Manually maintaining a list of transmitters would be almost impossible. Here is a list of ABC transmitters in VIC alone (46 digital transmitters). http://abc.net.au/reception/freq/vic.htm For a complete list view http://www.acma.gov.au/webwr/_assets/main/lib100059/broadcasttransmitterexcel.zip or http://www.acma.gov.au/WEB/STANDARD//pc=PC_9150 Note that these lists don't have any digital specific details. I don't think reporting the COFDM parameters is required. That probably does not clear anything up but perhaps it will help to define some new requirements. I hope to be release my dvb tools soon so perhaps a widespread survey could be done.... John. Peter D. wrote: > Hi, > > I'm taking some things on trust here, so feel free to tell me I am wrong. > > My main source is http://www.dba.org.au/index.asp?sectionID=120 > > It says, among other things; > > these parameters may be changed from time to time without warning, > > receivers need to comply with Standards Australia standards AS 4933 > and AS 4599, as well as DVB standards, that say a receiver needs to > identify and receive all COFDM modes, including hierarchical (see > below), and > > the receiver should check the Transmission Parameter Signaling (TPS) > > some broadcasters use centre frequency offsets > > I'm not sure how clever that means tuners sold in Australia should be or, > more importantly, actually are. > > In this post http://www.linuxtv.org/pipermail/linux-dvb/2007-May/018262.html > John offered a tuning file for Australia that was mostly full of "AUTO"s > with what looks like an entry for every frequency used in Australia. It > works for me with a Kworld/VStream Xpert card in Melbourne. > > I don't know how much the Australian "standards" vary from international > standards, but I believe that one or two channels have been moved by a > Mega Hertz and an extra channel (9A) added. Channel 12 might be non > standard > too, I don't know. > > Looking through the au-* tuning files and the www.dba.org.au site there are > some things that are still a mystery to me. > > There seem to be many more transmitters scattered around the country than > are mentioned in the au-* tuning files. > > The www.dba.org.au site only lists a single FEC for each group of channels, > while the tuning files have a fec_hi and a fec_lo. In many files that is > given as a fraction and a "NONE", sometimes as two fractions, usually the > same fraction - sometimes as different ones. > > Is the fec_low value used? Only valid sometimes? Should it be "AUTO", > "NONE", the same as fec_hi, or is it an independent variable? > > The big problem is that *most* of the channel 7 transmitters have changed > their guard interval. > > The changes that I am offering here seem to be improvements, but I can > only test Melbourne stuff. > > au-Perth and au-Melbourne have recently changed to have the new ch7 GI. > > The files attached are; > > A generic Australian file, au-auto, from John. > > au-Adelaide, new ch7 GI > au-Cairns, new ch7 GI > au-Canberra-Black-Mt, new Prime FEC and GI > au-Darwin, new Southern Cross FEC and GI, new ch9 FEC and GI > au-Melbourne-Upway, new ch7 GI > au-MidNorthCoast, lots of changes > au-SpencerGulf, new SBS FEC > au-Sydney_Kings_Cross, new ch7 GI > au-Townsville, new ch7 GI > > There are other au-*tuning files that I am not offering changes for. > > > > ------------------------------------------------------------------------ > > # Australia all dvb frequencies - maybe > # If this does not work try the city specific files > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > > T 48500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 59500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 66500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 88500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 97500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 104500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 140500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 177500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 184500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 191500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 198500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 205500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 211500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 212500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 218500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 219500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 226500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 523500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 529500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 536500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 543500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 550500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 557500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 564500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 571500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 578500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 585500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 592500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 599500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 606500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 613500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 620500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 627500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 634500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 641500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 648500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 655500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 662500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 669500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 676500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 683500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 690500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 697500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 704500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 711500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 718500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 725500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 732500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 739500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 746500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 753500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 760500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 767500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 774500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 781500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 788500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 795500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 802500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 809500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > T 816500000 7MHz AUTO AUTO AUTO AUTO AUTO AUTO > > ------------------------------------------------------------------------ > > # Australia / Adelaide / Mt Lofty > # 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 > T 177500000 7MHz 2/3 NONE QAM64 8k 1/16 NONE > # Nine > T 191625000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Ten > T 219500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # SBS > T 564500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > > ------------------------------------------------------------------------ > > # Australia / Cairns (Mt Bellenden-Ker transmitters) > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > # ABC VHF 8 > T 191500000 7MHz 3/4 3/4 QAM64 8k 1/16 NONE > # SEVEN VHF 11 > # T 219500000 7MHz 2/3 2/3 QAM64 8k 1/8 NONE > T 219500000 7MHz 2/3 2/3 QAM64 8k 1/16 NONE > # WIN VHF 12 > T 226500000 7MHz 3/4 3/4 QAM64 8k 1/16 NONE > # TEN VHF 6 (Expected Start Date Dec 2006) > T 177500000 7MHz 3/4 1/2 QAM64 8k 1/16 NONE > # SBS UHF 29 > T 536500000 7MHz 2/3 2/3 QAM64 8k 1/8 NONE > > ------------------------------------------------------------------------ > > # Australia / Canberra / Black Mt > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > # ABC > T 205500000 7MHz 3/4 3/4 QAM64 8k 1/16 NONE > # Prime > # T 226500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 226500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # WIN > T 219500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Ten > T 177500000 7MHz 3/4 1/2 QAM64 8k 1/16 NONE > # SBS > T 543500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > > ------------------------------------------------------------------------ > > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > # ABC (UHF 30) > T 543625000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Nine (UHF 31) > # T 550500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 550500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # SBS (UHF 29) > T 536625000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > # Southern Cross (UHF 32) > # T 557625000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 557625000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > > ------------------------------------------------------------------------ > > # Australia / Melbourne (Upwey Repeater) > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > # ABC > T 662500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Seven > # T 620500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 620500000 7MHz 2/3 NONE QAM64 8k 1/16 NONE > # Nine > T 641500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Ten > T 711500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # SBS > T 683500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > > ------------------------------------------------------------------------ > > # Australia ABC Mid North Coast > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > # ABC middle brother > # T 184625000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 184625000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Prime Middle Brother > # T 198500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 198500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # NBN Middle Brother > # T 226500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 226500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Ten Middle Brother > # T 641500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 641500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # SBS middle brother > T 205500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > # ABC Moombil > # T 585500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 585500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Prime Moombil > # T 543500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 543500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # NBN Moombil > # 564500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 564500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Ten Moombil > # T 599500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 599500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # SBS Moombil > T 606500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > > ------------------------------------------------------------------------ > > # Australia / South Australia / Pt Pirie (THE BLUFF) > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > # ABC > T 599500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Southern Cross > T 641500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # SBS > # T 620500000 7MHz 3/4 NONE QAM64 8k 1/8 NONE > T 620500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > > ------------------------------------------------------------------------ > > # Australia / Sydney / Kings Cross and North Head > # > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > # > # ABC UHF30 > T 543500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Seven UHF48 > # T 669500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 669500000 7MHz 2/3 NONE QAM64 8k 1/16 NONE > # Nine UHF33 > T 564500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Ten UHF45 > T 648500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # SBS UHF34 > T 571500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > > ------------------------------------------------------------------------ > > # Australia / Brisbane (Mt Coot-tha transmitters) > # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy > # SBS > T 592500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > # ABC > T 550500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Seven > # T 599500000 7MHz 2/3 NONE QAM64 8k 1/8 NONE > T 599500000 7MHz 2/3 NONE QAM64 8k 1/16 NONE > # Nine > T 620500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > # Ten > T 585500000 7MHz 3/4 NONE QAM64 8k 1/16 NONE > _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
