I had access to one of them in the 90s when I was working in a TV repair shop, and I remember being impressed at what it could do, I sort of remember it having a full screen raster, but I'm not 100% sure, it's been a while since I have seen one.
https://www.radiomuseum.org/images/r...77b_897561.jpg
random pic found when searching.
But yeah, good idea, hook it up to a good TV, see what you get! :P