Open
Terminal and enter this command: lsusb

You should get around 10 lines of output, and hopefully you can recognize one of
them as the tuner. For example, my webcam shows up as:
Bus 003 Device 002: ID 0ac8:303b Z-Star Microelectronics Corp. ZC0303 Webcam

The most useful information is the ID, 0ac8:303b in the case of my webcam.
Google the ID along with the word USB, and you should find a web site which will
tell you more than you want to know about the device.

A different approach would be to Google: mobidtv DVB mythtv

Mythtv is the gold standard for TV reception under Linux. I found this comment:
"It's ok....after much struggling I worked out that it automatically hotplugs
when you put the firmware in /lib/firmware."