DVBSky T680C

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Revision as of 15:01, 4 December 2013 by MAREL (talk | contribs) (→‎Software: change to: Driver Installation; Remove older obsolete installation procedure.)
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DVB-C and DVB-T/T2 capable USB box by chinese company DVBSky.


Confirmed working with tvheadend and xbmc using custom media stack from DVBSky in Ubuntu 13.04 / 64bit.


  • USB 2.0 (Type B)
  • 12V Power Supply
  • Belling Lee Connector (Cable or Antenna)
  • CI-Slot


  • USB Vendor-ID / Product-ID: 0572:680c "Conexant Systems (Rockwell), Inc."
  • Identifies itself as Sit2 DVB-T2/C

Test case - Hardware - Reception - Comparison

Used as DVB-C device connected to german cable provider Kabel BW (Unitymedia). Replaced a Technotrend TT-connect CT-3650 CI (hardware breakdown, seemed to die of overheating or something). Software used: Ubuntu 13.04 (amd64), TVHeadend and XBMC. PC is an Atom D525-based Zotac Z-Box ID-34 (NVidia ION).

Good reception and quick channel switches. Works very well. Scanning for channels in tvheadend didn't find all the channels at first scan, due to bad reception, however after manually mapping them they worked flawlessly.

Compared to CT-3650 CI: The T680C doesn't heat up (just under hand-warm), even after hours receiving HD-TV channels (720p). It has in general better reception than the CT-3650 and is able to recive all channels. CT-3650 had frequently problems on the same line and some of the channels could not be used without frequent bit errors. From my point of view the DVBSky T680C works much better and more reliable than the Technotrend CT-3650 CI.

Compared to my GRUNDIG Television (40 VLE 8221 BL): Signal quality of channels looks much better on the GRUNDIG by value, however the channels work exactly the same. The T680C shows less good signal value for some channels but is better able to decode them afterwards / less or none image scatter compared to the Grundig Televisions build-in DVB-C.

Seems to be good hardware.

Not tested

  • Infrared remote (I use the remote from my TV via CEC-USB from Pulse8, so I don't need it)
  • DVB-T
  • CI-Slot

Driver Installation


$ dmesg | grep -i dvb
[   12.930074] usb 1-4: dvb_usb_v2: found a 'DVBSky T680CI' in warm state
[   12.930113] usb 1-4: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[   12.930123] DVB: registering new adapter (DVBSky T680CI)
[   12.930267] usbcore: registered new interface driver dvb_usb_dvbsky
[   13.008400] usb 1-4: DVB: registering adapter 0 frontend 0 (Sit2 DVB-T2/C)...
[   13.207713] Registered IR keymap rc-dvbsky
[   13.207799] input: DVBSky T680CI as /devices/pci0000:00/0000:00:12.2/usb1/1-4/rc/rc0/input11
[   13.207845] rc0: DVBSky T680CI as /devices/pci0000:00/0000:00:12.2/usb1/1-4/rc/rc0
[   13.207849] usb 1-4: dvb_usb_v2: schedule remote query interval to 300 msecs
[   13.207852] usb 1-4: dvb_usb_v2: 'DVBSky T680CI' successfully initialized and connected
[   19.444990] dvb_ca adapter 0: DVB CAM detected and initialised successfully
$ lsusb | grep -i Conexant
Bus 001 Device 003: ID 0572:680c Conexant Systems (Rockwell), Inc.