The simple way to check for the existing TV engine is to open the capturecarddefinitions and look for an entry for that card.
I had a quick look now and couldn't find it though.
If you use the TV engine 3 then it will auto detect any tv card that Windows can see (ie, with BDA drivers).
If you want a cheap card, the compro t300 or t200 are a good buy and are detected by MP. |