Seems that Agilent used this option licensing scheme on a lot of products.
Just for educational purpose, are others interested in working on the logic of how the keys were generated?
For Example, the potions of the ESG signal generators are an example, or the key system for the 89601A or B VSA software.
Only for the obsolte/no longer supported ones, of course.
Maybe someone can trow in some tips, I have some sets of host IDs and options codes for the ESGs.