Stumbled over this, a HP 5005B signature multimeter.
https://www.ebay.com/itm/154276310308
That's a nice one.
..but 200€ starting bid is
a bit over the top..!
Despite the fact that it was meant as a versatile service tool incorporating signature analysis and DMM, one would rarely need it today/could barely use it today.
For signature analysis you need the "good" reference signatures, mentioned in the service manual. Try to get matching FW and service manual these days..
I have a 5006A signature analyser and its fascinating to see it work. An yes, it works. And yes, I have HP TE that has a signature mode for debugging.
But out of the TE I've repaired I didn't have the luck to have the right signatures to the revision of the individual TE...