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I have this sort of probs too...
I think these tv tuners require MUCH more signal than regular tvs... ie. I've hooked up the exact same cable (coaxial) to a tv tuner card and it doesn't even "detected" all the channels, these ones were considered "noise", however, on a regular tv, the image quality was near perfect...
A workaround is to use composite connectors... or even better S-Video... Those tv tuner cards should have this kind of inputs... |