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14th June 2012, 16:42 | #21 | Link | ||
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Join Date: Apr 2004
Location: Europe, Czech Republic, Brno
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Yes, but the sound ones are more disturbing, if occurs.
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Vista64 Premium SP2 / C2D E4700 2.6GHz/ 6GB RAM/ Intel GMA 3100 / DTV Leadtek DONGLE GOLD USB2 / focused to DVB-T MPEG2 PS capture -> ProjectX -> M2V/MP2 -> MeGUI/AVS -> MP4[AVC/AAC] |
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15th June 2012, 16:14 | #22 | Link | ||
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Switching large electric power without proper decoupling create spikes which have high energy and very high bandwidth. This can be compared at some point to EMP. Quote:
My advice - instead of building common antenna installation, use home antenna, passive, no amplifier. And also seems that You should be able to raise this problem to government authority responsible for quality of the RF spectrum - it is forbidden to corrupt RF signal - they should help you - this is mandatory for them - usually there special agency in telecommunication ministry - they searching for illegal transmitters but also they search for sources of such spikes. |
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16th June 2012, 13:25 | #23 | Link | ||
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Join Date: Apr 2004
Location: Europe, Czech Republic, Brno
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E.g. using digital video output from videocard, to monitor picture is fine. But during temporal period I used integrated intel graphics with analog output. At that time monitor picture was very eye-disturbing, if my microwave oven was working. Quote:
without direct visibility and with reflection from other buildings will not be satisfactory. I used initially a simple dipole, coming with my receiver, but strength and quality was very poor. Than I bought room active antenna, strength and quality better, but still not excellent. The common source was much better. All that struggles are not worthy for me to solve. Either I can take the signal as it is, either I fix it and I already know how. Thanks all for the support.
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Vista64 Premium SP2 / C2D E4700 2.6GHz/ 6GB RAM/ Intel GMA 3100 / DTV Leadtek DONGLE GOLD USB2 / focused to DVB-T MPEG2 PS capture -> ProjectX -> M2V/MP2 -> MeGUI/AVS -> MP4[AVC/AAC] |
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16th June 2012, 20:46 | #24 | Link |
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Location: Berlin, Germany
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Just at the end of this discussion I'd like to add my two cents...
DVB-T receptionwise I think I am in a similar situation as Poutnik. I live on the first floor of an older 6-story building in the middle of Berlin, Germany. Basically good signal coverage, but my low location plus being surrounded by other high buildings make the reception a little problematic. I uploaded a small sample of a typical audio glitch which neither ProjectX nor PVAStrumento can correct: http://www.sendspace.com/file/xqzzkk So far I have not found an automatic way to correct such glitches, the best I could get was using Sonic Foundry plugins (Vinyl Restoration and Click & Crackle Removal). But it is much easier to remove those spikes manually in a WAVE editor. Still I'd like to share some tips how I improved my DVB-T captures considerably. The cost to put an antenna on my roof was prohibitive, so I did a lot of testing different antennas and some different tuners. First of all I strongly disagree with Pandy when he discards active antennas. In all my tests active antennas delivered a higher quality signal compared to passive ones. The real breakthrough for me was to use a diversity tuner. That's two separate tuners in one case which can be used in a way that one of the tuners corrects the signal of the other one. One tuner uses a directional antenna (Technisat Digitenne), the other one a simple omnidirectional antenna. Both antennas are spaced apart by about 2 meters. Another problem for me was my slow computer. I don't know if this applies to you, but for a slower machine you should observe some things: Capture in renderless mode. DVBViewer and DVBDream are my favorite capture programs. Also set priority to High and use a large recording buffer (Older versions of DVBViewer support this setting). During capture disable your Internet connection and terminate all background software which could compromise I/O (like resident virus scanners). Cheers manolito |
18th June 2012, 08:41 | #25 | Link |
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Location: Germany
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Yes, diversity antennas are excellent for location with a lot of interferences (like your flat). However, one could try and fail to find a better position for the antenna (my antenna had such a strange position until I renounced at all at DVB-T).
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18th June 2012, 12:47 | #26 | Link | ||
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Not sure how you performed you tests but i know how antenna works and there is no magic - high gain passive antenna is ALWAYS better than low gain antenna with amplifier (there is no sens in amplifying noise and add noise from amplifier itself). Quote:
COFDM with correct Guard Interval values can gain from many paths of signal. http://en.wikipedia.org/wiki/Orthogo...l_interference |
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Tags |
audio, errors, fix, spikes, transmittion |
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