I don't know that these devices came with a "manual" of any sort. All I've ever found was the in-box marketing materials that showed the various Vidicraft devices of the same generation.
Honestly, there's no need for a "manual" of any kind. The controls are straight-forward. It has a pair of sharpening knobs, and a pair of de-noise knobs (to counteract noise introduced by the detail enhancement process).
These were made for broadcasters, people that understand what terms like "core" and "VNX" meant. (VNX was a proprietary term explained on the side of the box, if I remember correctly.) There wasn't any kind of de-jargon document for laymen included, which is what folks typically seek.
What is it that you have a question about? I'll be glad to explain it for you.