That didnt help much, but ok. If you really need DAQ, Logic Analyzers and such, to make some rocket science of LD games (and most of them are in a quality range more worse than a very bad VHS copy), then its that. I wish you all good luck with your goal (and i truly mean it).
Well if you cant trust a Blackmagic Decklink card, while it is a de facto standard in every good post production house for capturing stuff, i still have hope that your approach with DAQs, Analyzers and what not, will create much better results.