Hauppauge DEC2540-T USB
A DVB-T USB 1.1 device manufactured by TechnoTrend and resold by Hauppauge.
It is supported under Linux.
Overview/Features
The DEC2540-T is a digital receiver set-top box that it is equipped with an USB port, allowing it to be used either as a PC peripheral or as a standalone STB (i.e. used without a PC). It is similar to the DEC2000-T but comes equipped with a Conax(?) decrypt card slot. Decryption is not supported under GNU/Linux. The device is only sold in the Netherlands.
One can watch digital TV with this device using xine, or alternatively record the incoming stream via cat'ting /dev/dvb. The device's TV-Out can't be used for PC output.
The device can only deliver a partial/modified TS stream to userspace: due to the limited bus bandwidth provided by USB 1.1, of approximately 12Mbps, only selected PIDs can be transferred over USB to the host system. Consequently, some high bandwidth transponders won't work, and HDTV reception is not possible.
[ Q. Does it use a Texas Instruments DSP that remultiplexes the stream into a TechnoTrend-proprietary USB packet format and sends it as Isochronous USB Stream over the bus ? (as in the case of the Hauppauge WinTV-NOVA-T USB) ?? Sounds like it does. ]
Components Used
DEC-specific
- frontend ... TDA10045 demodulator ?
- has an onboard hardware video+audio decoder ... AV711x MPEG-2 Decoder ?
- usb interface (Texas Instruments ?)
Identification
USB device id: 0b48:1009
Making it work
Firmware
dvb-ttusb-dec-2540t.fw
If you have the kernel sources installed, or have installed the dvb-apps, use the following command: "get_dvb_firmware dec2540t"
Copy the file downloaded above into the /lib/firmware directory.
Drivers
The device's internal components are hidden behind the USB interface.
The following drivers are needed for this device:
- ttusbdecfe.ko - ttusb_dec.ko
Also See
- Hauppauge DEC2000-T USB, a similar model
External Links
- Hauppauge product page
- A users report