TechnoTrend TT-TVStick CT2-4400

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A combined DVB-C, DVB-T and DVB-T2 USB 2.0 device from TechnoTrend. There are two different versions of the tuner. Version 1 is supported since kernel 3.17. Version 2 is supported since kernel 3.19.

DVBSky T330 appears to be the same device with different USB ID. A clone of this one is also marketed as HMP-Combo. Edision OptiCombo is also a clone of the T330.


Components Used

The following components are used on a board that's marked 2013.12 ver 1.0b

  • USB interface: Cypress CY7C68013A-56LTXC
  • Demodulator: Silicon Labs Si2168-A30
  • Tuner: Silicon Labs Si2158-20

There's also a second version of the tuner CT2-4400v2 that has the components listed below.

  • USB interface: Cypress CY7C68013A-56LTXC
  • Demodulator: Silicon Labs Si2168-B40
  • Tuner: Silicon Labs Si2158-20

Driver support

Drivers are included in kernel 3.17 (for version 1) and 3.19 (for version 2). They can be built with media_build for older kernels.


Bus 002 Device 004: ID 0b48:3014 TechnoTrend TT-TVStick CT2-4400


[599278.838646] dvb-usb: found a 'TechnoTrend TVStick CT2-4400' in warm state.
[599278.838673] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[599278.838880] DVB: registering new adapter (TechnoTrend TVStick CT2-4400)
[599279.047712] i2c i2c-0: Added multiplexed i2c bus 1
[599279.047715] si2168 0-0064: si2168: Silicon Labs Si2168 successfully attached
[599279.050536] si2157 1-0060: si2157: Silicon Labs Si2157/Si2158 successfully attached
[599279.050544] usb 2-1.5: DVB: registering adapter 0 frontend 0 (Silicon Labs Si2168)...
[599976.030577] Registered IR keymap rc-tt-1500
[599976.030652] input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/rc/rc0/input37
[599976.030744] rc0: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/rc/rc0
[599976.030746] dvb-usb: schedule remote query interval to 150 msecs.
[599279.050901] dvb-usb: TechnoTrend TVStick CT2-4400 successfully initialized and connected.
[599279.050916] usbcore: registered new interface driver dvb_usb_cxusb
[599358.318273] si2168 0-0064: si2168: found a 'Silicon Labs Si2168' in cold state
[599358.318327] si2168 0-0064: si2168: downloading firmware from file 'dvb-demod-si2168-a30-01.fw'
[599361.758473] si2168 0-0064: si2168: found a 'Silicon Labs Si2168' in warm state
[599361.769721] si2157 1-0060: si2157: found a 'Silicon Labs Si2157/Si2158' in cold state
[599361.769760] si2157 1-0060: si2157: downloading firmware from file 'dvb-tuner-si2158-a20-01.fw'


Firmware for both the demodulator and tuner are necessary. OpenELEC dvb-firmware collection includes firmwares for this device too. Note that when downloading the firmware files from the OpenELEC firmware collection it's necessary to click the name of the firmware file first and then the "raw" button to download the actual binary!

  • dvb-demod-si2168-a30-01.fw
  • dvb-tuner-si2158-a20-01.fw

Place the 2 firmware files in /lib/firmware.


If you have the second version of the device, you will need a different firmware for the demodulator. The correct file for the demodulator firmware is dvb-demod-si2168-b40-1.fw and can be downloaded from the OpenELEC dvb-firmware collection.

IR Remote Control

The supplied remote control is supported by the driver.

Known issues

External Links