But a general question here. Is this how you keep these older PC based instruments running? I have a couple of oscilloscopes and a SMU but nothing with a hard disk that I am aware of.
PC based test instruments are not worse in terms of reliability or repair than other complex instruments. Hard drives are often a weak point but at least for Windows based instruments they can usually be replaced easily (these days with an SSD).
On the other side, having Windows on the instrument brings quite a few advantages.
Wuerstchenhund (spelling! ) suggested I get a FSP model, but isn't that an even older beast also running on XP (has a floppy disk on it's face for God's sake...).
Don't get mislead by the floppy drive, even later R&S analyzers came with them.
As to the FSP: there are two versions of the FSP, the first generation one (1093.4495.xx) which came out in 2000 and which runs Windows NT and comes with PS/2 mouse port, and the later generation (1164.4391.xx, came out around 2005) which runs Windows XP and comes with a faster processor and USB ports. R&S has kept the floppy drive in the later model as standard equipment unless you ordered the optional CF card reader.
The FSL came out in 2007 if I remember right, however the FSP has been replaced by the Windows 7 based FSV a around three years ago while the FSL is still sold.
Or are the specs that dramatically different so constantly nursing the ancient PC (and probably hard disk) inside to health is worth it? You can tell I have very little experience with these, and was just hoping I get something for the lab a bit better than a Rigol (or is the R&S FSL even better than the 3GHz Rigol?)...
My point was simply that investing a lot of money to get an FSL (which is a low-end spectrum analyzer, although a much better one than the Rigol) working may not be worth it when fully working second generation FSPs are often sold for pretty reasonable money. Of course it depends on what's wrong with the device and how much you'd have to pay to for the instrument plus to get it going again.
In terms of performance, R&S considers the FSP a mid-range analyzer but it's performance is much better than the FSL and even bests the HP 8566/8568 Series (which by many is considered the gold standard in spectrum analyzers).