TerraTec Cinergy DT USB XS Diversity

From LinuxTVWiki
Revision as of 09:54, 19 November 2007 by Petrias (talk | contribs) (added tuner sensitivity note, added module param info & Gutsy ok note)
Jump to navigation Jump to search

A DVB-T USB device from TerraTec.

subsystem ID: 005a:0ccd

features two tuners, and have two antennas. You'll have adapter0 and adapter1 in /dev/dvb, which you can use separately.

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 [1].

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.

User experiences

Date: 22.8. 2007

Distro: Ubuntu Feisty, AMD64

Kernel: 2.6.20-16-generic

The drivers shipping with Feisty are not recent enough, so installed the current v4l-dvb distribution ([2]. It can be downloaded through Mercurial's web interface (see 'bz2' & 'gz'). Otherwise, you'd have to install & use Mercurial to fetch the source.

Downloaded the new dvb-usb-dib0700-03-pre1.fw firmware from [3] & copied it to /lib/firmware (if that does not work, flash the stick with the latest firmware from Terratec on a Windows PC).

After these steps, the stick works - I was able to find channels & get TV out of them.

Update: 19.11. 2007

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. In short, if experiencing this problem, try setting the following (in /etc/modprobe.d/options or /etc/modules.conf):


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.

Finally, this stick works just fine on 32-bit Ubuntu Gutsy as well.

(note: the following is likely dated by now)

openSUSE 10.2 (i586) Kernel

Compiling the driver vv4.tgz from http://www.chez.com/treza/mt2266.htm

(on my system a netdevice.h was needed in /lib/modules/

Copying the firmware dvb-usb-dib0700-01.fw to /lib/firmware

Reboot, connect the stick, kaffeine, enjoy.

External links