Soundblaster -> DSP-A2

Hi, I need to know more about the DD Digital RF signal and CD coaxial inputs on DSP-A2.

I have a PC with a Soundblaster card with digital out. It's some 25 meters from my DSP-A2 amplifier so I'm planning to use a TP-cable (classifed for 100MHz) to connect the digital out on the Soundblaster car to DSP-A2. But which input on DSP-A2 should I use?

(And what about the S-Video from my graphics card? I was planning to connect both audio an video to my DVD input but I can't since there are no DVD-coaxial. Should I therefore just connect S-Video directly to my TV?)

Hope you can help me on this, I'm a bit lost here.

Thanks!