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

Driver and more

Manufacturer provides a proprietary binary-only driver for x86 architecture. There's a different version of the driver for DVB-T/T2 and DVB-C, so both cannot be used simultaneously.

There's also an open source driver being developed. The driver is ready, but not part of Linux kernel yet. The media_tree with the driver can be downloaded from Github. [1]


[   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

lspci -v

07:00.0 Multimedia video controller: Conexant Systems, Inc. CX23885 PCI Video and Audio Decoder (rev 04)
        Subsystem: Technotrend Systemtechnik GmbH TT-budget CT2-4500 CI
        Flags: bus master, fast devsel, latency 0, IRQ 47
        Memory at fbc00000 (64-bit, non-prefetchable) [size=2M]
        Capabilities: [40] Express Endpoint, MSI 00
        Capabilities: [80] Power Management version 2
        Capabilities: [90] Vital Product Data
        Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [200] Virtual Channel
        Kernel driver in use: cx23885