Does anyone know of a source of firmware updates (on EEPROMs) for older HP spectrum analyzers, such as the 8594EM? Or even a list of what bugs were fixed and featured added with various versions? We have some older test equipment like this around the shop, and I'm curious as to what else might be possible with these units... in many ways they're a lot more "interesting" than the newer analyzers which are just big Windows boxes.
Thanks,
---Joel