https://www.linuxtv.org/wiki/api.php?action=feedcontributions&user=Spooch&feedformat=atomLinuxTVWiki - User contributions [en]2024-03-28T16:07:28ZUser contributionsMediaWiki 1.39.6https://www.linuxtv.org/wiki/index.php?title=TerraTec_Cinergy_DT_USB_XS_Diversity&diff=13321TerraTec Cinergy DT USB XS Diversity2008-02-03T17:36:45Z<p>Spooch: </p>
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<div>A [[DVB-T]] [[DVB-T USB Devices|USB device]] from [[TerraTec]].<br />
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subsystem ID: 005a:0ccd<br />
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features two tuners, and have two antennas. You'll have adapter0 and adapter1 in /dev/dvb, which you can use separately. <br />
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The "Diversity" option is a hardware based feature that allows for the device's two receivers to be configured in a combined use mode to achieve better reception on a single channel. The diversity feature of the DiBcom demodulators is currently not implemented in the Linux-DVB drivers, so only the dual tuner configuration is presently supported on such devices [http://www.linuxtv.org/pipermail/linux-dvb/2007-July/019419.html].<br />
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It seems that either this tuner stick does not have a very sensitive tuner, or the small antennas that come with it are simply insufficient for real-life use, unless one lives next door to a broadcast tower and has a direct line-of-sight to it. It is thus likely that an external antenna with a builtin amplifier is needed when this tuner is used.<br />
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==User experiences==<br />
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'''Date: 22.8. 2007'''<br />
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Distro: Ubuntu Feisty, AMD64<br />
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Kernel: 2.6.20-16-generic<br />
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The drivers shipping with Feisty are not recent enough, so installed the current v4l-dvb distribution ([http://linuxtv.org/hg/v4l-dvb/]. It can be downloaded through [http://linuxtv.org/hg/v4l-dvb Mercurial's web interface] (see 'bz2' & 'gz'). Otherwise, you'd have to install & use Mercurial to fetch the source.<br />
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Downloaded the new dvb-usb-dib0700-03-pre1.fw firmware from [http://www.wi-bw.tfh-wildau.de/~pboettch/home/linux-dvb-firmware/dvb-usb-dib0700-03-pre1.fw] & copied it to /lib/firmware (if that does not work, flash the stick with the latest firmware from Terratec on a Windows PC).<br />
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After these steps, the stick works - I was able to find channels & get TV out of them.<br />
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'''Update: 19.11. 2007'''<br />
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Tuners using the dvb-usb-dib0700 module may be unable to tune to a particular channel multiplex while receiving others just fine. This appears to be a fairly common problem that is caused by some sort of amplifier setting not getting used when it should; look for lines with "filter timeout" when running 'scan', if you are missing all channels of a particular multiplex.<br />
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In short, if experiencing this problem, try setting the following (in /etc/modprobe.d/options or /etc/modules.conf):<br />
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<nowiki><br />
dvb_usb_dib0700.force_lna_activation=1<br />
</owiki><br />
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After the module has been reloaded, you might be able to find and view the missing channels :-) You can check /sys/module/dvb_usb_dib0700/parameters/force_lna_activation on your system to make sure the parameter has been set.<br />
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Finally, this stick works just fine on 32-bit Ubuntu Gutsy as well.<br />
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----<br />
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<br />
(note: the following is likely dated by now)<br />
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openSUSE 10.2 (i586)<br />
Kernel 2.6.22.1-ccj51-default<br />
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Compiling the driver vv4.tgz from<br />
http://www.chez.com/treza/mt2266.htm<br />
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(on my system a netdevice.h was needed in /lib/modules/2.6.22.1-ccj51-default/build/include/linux)<br />
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Copying the firmware dvb-usb-dib0700-01.fw to /lib/firmware<br />
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Reboot, connect the stick, kaffeine, enjoy.<br />
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'''Update: 3.2.2008'''<br />
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Tuner works partially fine with Kernel 2.6.24-gentoo + xorg-server-1.4 + kaffeine 0.8.6 with xine-lib-1.1.10<br />
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The mt2266 modul is now included in the main kernel tree. Unfortunatly the Diversity Mode (two tuners running as one for better receive) doesnt work. Furthermore the Windows receiver has a mucher better receive quality :-(. I.e. in Windows Im getting all 23(24) channels, in Linux only 19(20).<br />
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== External links ==<br />
* [http://tven.terratec.net/modules.php?op=modload&name=News&file=article&sid=251 TerraTec product page]</div>Spooch