From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from ayden.softclick-it.de ([217.160.202.102]:48473 "EHLO ayden.softclick-it.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752262AbZA0MIq (ORCPT ); Tue, 27 Jan 2009 07:08:46 -0500 Message-ID: <497EF972.6090207@to-st.de> Date: Tue, 27 Jan 2009 13:09:22 +0100 From: Tobias Stoeber Reply-To: tobi@to-st.de MIME-Version: 1.0 To: linux-media@vger.kernel.org CC: linux-dvb@linuxtv.org Subject: Re: [linux-dvb] Upcoming DVB-T channel changes for HH (Hamburg) References: <497A27F7.8020201@to-st.de> <19a3b7a80901261228v393f5fcbv7559b573c0ca1539@mail.gmail.com> <497EC855.7050301@to-st.de> <19a3b7a80901270237n761240bbn2627f782ddbffa29@mail.gmail.com> In-Reply-To: <19a3b7a80901270237n761240bbn2627f782ddbffa29@mail.gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org List-ID: Hi Christoph, Just had a look at your zip archive and the files. Christoph Pfister schrieb: > I've updated my de-files: > - fixed the url (inserted the wrong one by accident) > - fixed vhf channels (they were using 8mhz because my trigger was wrong) > - add the the "# CHxy: name of programs" information > - 563 MHz --> 562 MHz (their pdf seems to use a wrong frequency for channel 32) You are right. 562 MHz as nominal frequency is correct, because for DVB-T this is calculated 306 MHz + channel number x 8 MHz. VHF would be 142.5 MHz + channel number x 7 MHz. It's just a centre frequency used for tuning purposes. The DVB-T signal should (ideally) use a 8 MHz width space from 559.25 MHz to 567.25 MHz for Ch 32. > But I haven't looked at the new documents proposed in this thread yet. I didn't compare that either. Could also be difficult, because of different revision dates. Looking through your files in the zip archive, it rose some questions in my mind: a) is it really useful to have scan files by federal state (Bundesland)? Just let me explain with an example. I live in Sachsen-Anhalt on the north of the Harz Mountains area. To effectivly ("best") use DVB-T I do combine both transmitters in Sachsen-Anhalt (Mt. Brocken) and from Niedersachsen (Braunschweig). This is because some channels are only available from a specific transmitting site (private channels only from Braunschweig, RBB only from Brocken). The same applies to other regions in Sachsen-Anhalt (south east will have reception from Sachsen and Thüringen, north east from Berlin / Brandeburg etc.) I think, this situation will also apply to other federal states. => I personally would prefer to stay with or alternatively provide a region based file, so I could look up and combine the regions of interest. What do you think? b) Conflicting information In your "Sachsen-Anhalt" scanfile you list on Ch 24 the ARD multiplex with (Halle-Stadt): T 498000000 8MHz 2/3 NONE QAM64 8k 1/4 NONE # CH24: Das Erste, arte, Phoenix, EinsFestival which is for a large part of Sachsen-Anhalt useless (we can't receive that), as we actually receive on Ch 24 (from Braunschweig) T 498000000 8MHz 2/3 NONE QAM16 8k 1/4 NONE # CH24: RTL, RTL II, Super RTL, VOX => have a look at QAM, its QAM64 in your scanfile and QAM16 for Ch24 we actually receive. => Does it matter, e.g. would instead of the unreceivable Ch24 from Halle-Stadt the Braunschweig Ch24 be found? (I did not test this). c) You clearly missed out some information. I noticed for instance Ch 37 in Leipzig (Sachsen) which is the "Leipzig 1" multiplex Please have a look at the already posted link to SLM or my homepage: http://www.to-st.de/content/projects/dvb-t/dvbt-sender-leipzig.de.html On the other hand I doubt, that it would be a useful entry into a "Sachsen" scanfile because reception is limited to the area of the city of Lepzig. As I have no overview of regional "special projects" in other area, such omissions in the files may apply to other areas too. @Barry Just as a sidenote and for historical purposes I may point you to: http://www.ifn.ing.tu-bs.de/itg/docs/030403Braunschweig/ITG030403Hoehne_Frequenzplanung.pdf which gives an overview how in 2003 the concept for the north of Germany had been planned. This information is obsolete and has changed, but the document show a bit, how decisions evolved in consideration of federal state and "Medienanstalt" boundaries (e.g. Bremen) etc. Regards, Tobias