Testing HP821634 A Video Interface

[johnquirke1000]

Hi, years ago, I bought a HP821634A video interface from the USA well, I've never used it and I want to sell it. So, I've tried testing it. So, I hooked it up to a TV and no joy. I then looked further (back page of the manual!) and found out that one needs a HP 82163B for the UK and that will only work with a monitor!!! 8-(

So, am I wasting my time with this and should, really, get it recycled? Or, is there some adapter that I can get to hook the composite output up to a modern monitor? Any thoughts/advice will be much appreciated.