Thanks for the photos!
I can confirm that I do not have options 1E2 or 1E6 as the parts don't exist in my unit. They aren't options I need anyway so no problems there.
The 1EA high power option is intriguing me though. With no reference to special parts in the 'Replaceable Parts' section of the service manuals I have found online, I'm wondering how a repair technician is to ensure that the option still works if the mysterious critical part is inadvertently replaced? How to ensure the part is not replaced with a non option part if there is no differentiation in the manual?
Which has me thinking further, is it just a software option? Maybe it changes the gain settings on the amplifier or attenuator settings to allow more upper range?
I wonder if just using the adjustment software etc to tell the instrument that it has the option installed will enable it?
Worth digging deeper I think, that high power option is a useful one...
Jared.
Jared Cabot