How to set output to SDI 576i?

I’m developing an application and I want to set the output in SDI 576i. I have two options: nVidia card (+3.000€) or use a conversor HDMI/SDI cheeper. If I use the second, can I have decressed the output quality? (distornion pex?). Any third option? (I like thirds options)

@dormitando said: I'm developing an application and I want to set the output in SDI 576i. I have two options: nVidia card (+3.000€) or use a conversor HDMI/SDI cheeper. If I use the second, can I have decressed the output quality? (distornion pex?). Any third option? (I like thirds options)
3rd option: Don't use SDI :-) If you use "professional" video equipment, you have to pay a "professional" amount of money. The 1st and 2nd options work too of course. Since both HDMI and SDI are both digital, I don't think there will be a quality degradation when converted from one to the other.

Thanks for the repply. We will use a conversor finally.