Kudos to you sir, I got it working with TVheadend. Thank you very much.
I have a Hauppauge WinTV Nova-T USB 1.1 (you got the PCI version), but I couldn't find the drivers for it anywhere. Could you give me some hints as I'm relative new to LibreELEC. This box was working under Windows XP long time ago.
Hauppauge WinTV-NOVA-T USB - LinuxTVWiki
Thanks