Old Function Generators

[M0BSW]

I love a blog done on old Functions generators , how to use them mine I think is old , it's a Black*star ,Jupiter 500, lots of functions on it it goes from 0.1 to 500k HZ sine,saw,square waves freq multiplier coarse /fine output amplitude/DC offset lots more  & i'd love to get the best from it, it works fits my current budget, and I 'd like to understand it better.
So how a bout a get back to basics blog for old ,loved gear.