TechnoTrend TT-budget CT2-4500 CI

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A DVB-T/DVB-T2 or DVB-C PCIe card from TechnoTrend with integrated CI Slot. The card seems to be a OEM version of DVBSky T980C.


  • CI-Slot
  • Belling Lee Connector (Cable or Antenna)
  • PCIe x1
  • Low power

Technical Details

Original Version

Version 2.0

  • PCIe Bridge : Conexant PCIe A/V Decoder CX23885-15Z
  • DVB-T2/C demodulator : Si2168-B40
  • DVB-T2/C tuner : Si2157-A30
  • CI chip: CICORE 1.0 (same as CIMaX SP2HF)
  • PCI ID 13c2:3013

Driver and more

There's an open source driver that's included in kernel 3.19. The same driver works for both version 1.0 and 2.0. It can be built for older kernels using the media_build. Firmware is required for Si2168 demod and Si2158 tuner. See the details from the DVBSky T980C page.

Note! The CI handling is broken in the driver for kernels 4.0-4.5. This is fixed in the current media_tree and in kernels starting from 4.6.

The open source driver uses DVBv5, it can switch between DVBT, DVBT2 and DVBC/ANNEX_A

Use dvb-fe-tool to switch between them.

dvb-fe-tool -d dvbc/annex_a


lspci -vvvnn

06:00.0 Multimedia video controller [0400]: Conexant Systems, Inc. CX23885 PCI Video and Audio Decoder [14f1:8852] (rev 04)
        Subsystem: Technotrend Systemtechnik GmbH TT-budget CT2-4500 CI [13c2:3013]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Kernel driver in use: cx23885


[   20.249360] cx23885 driver version 0.0.4 loaded
[   20.249472] CORE cx23885[0]: subsystem: 13c2:3013, board: Technotrend TT-budget CT2-4500 CI [card=48,autodetected]
[   20.599261] cx25840 4-0044: cx23885 A/V decoder found @ 0x88 (cx23885[0])
[   21.441703] cx25840 4-0044: loaded v4l-cx23885-avcore-01.fw firmware (16382 bytes)
[   21.456930] cx23885_dvb_register() allocating 1 frontend(s)
[   21.456933] cx23885[0]: cx23885 based dvb card
[   21.458081] i2c i2c-3: Added multiplexed i2c bus 5
[   21.458088] si2168 3-0064: Silicon Labs Si2168 successfully attached
[   21.460274] si2157 5-0060: Silicon Labs Si2157/Si2158 successfully attached
[   21.460280] DVB: registering new adapter (cx23885[0])
[   21.460284] cx23885 0000:07:00.0: DVB: registering adapter 1 frontend 0 (Silicon Labs Si2168)...
[   21.512295] sp2 2-0040: CIMaX SP2 successfully attached
[   21.538835] Technotrend TT-budget CT2-4500 CI MAC address: bc:ea:2b:45:01:cb
[   21.538839] cx23885_dev_checkrevision() Hardware revision = 0xa5
[   21.538843] cx23885[0]/0: found at 0000:07:00.0, rev: 4, irq: 47, latency: 0, mmio: 0xfbc00000

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