I have Techcom TV Tuner card (SSD-TV-811). Its a USB TV Tuner.
I have connected the USB cable at the USB port of TV tuner and computer.
There is a line out port on TV tuner which i have connected to the port where my speakers were connected (I have disconnected the speakers).
Now i when scan for channels using WinDVR then no channel gets detected. I have selected the source as "TV" and Standard as "PAL_B" in the settings of WinDVR.