I am having this same error with a brand new ATI TV Wonder 750 (TVW750U) by Diamond. I installed the drivers directly from the disc that came with it. It did find the device in MC and even scanned successfully for channels. Only when I attempt to play one channel does it give me this same error. Any solutions?
This device is capable of receiving ATSC, DVB-T, and ClearQAM channels.
The following are the three tuners MC sees.
ATI CQAM Digital Tuner
DVBT Digital Tuner
ATSC/QAM Digital Tuner
The first, apparently is for ClearQAM, the second one is for DVB-T, and the third one should be used for ATSC.
In MC, go to Drives & Devices > Television > TV Options... > Settings..., select "ATI CQAM Digital Tuner", and click Configure... button. On the resulting "Tuner Type" property page, choose QAM. Similarly, choose DVB-T for "DVBT Digital Tuner", and ATSC for "ATSC/QAM Digital Tuner". Now MC will not be confused and will not load the wrong tuner.