Picked up an 8594E relatively cheap (it works fine) but it doesn't have narrow RBW filter, FAST ADC (for analog + display capability) and AM/FM demod options. It came with the TG and option 119 (which is easy to remove). Option 151/160 chews up remaining expansion card cage slots (2) and I need to free up room to install the other 3 cards. Looking at the analyzer there is more involved than just removing the 2 cards for the digital demod as I can see that the coax port on the A14 log amp is not in use. Without further disassembly I am guessing the cable that would normally go to the A14 log amp has been re-routed to one of the two digital demod cards. My concern is if that is the case and I pull the digital demod cards and put the cable back to A14 is whether I need to do a full log amp cal ? Also before I tear things apart option 160 mentions FIRMWARE to support option 151. Does this refer back to the main 4 system ROMS and if that is the case do I need to find stock firmware ROMS if I want to undo everything?
Unfortunately I have been unable to find the installation documentation that comes with the post factory user installed version of these options under part number 8590-60100 which would have shed some light on removing things by going through the installation process in reverse.