Recently i purchased a E4419B however the unit has a CPU fault, i found a used processor board that works however when pluging it in my meter the meter comes up as E4418A and returns error messages for the interface board, if i go to the service menue the serial# as well as processor bd and system version fields are blank, the same happens if i query those over GPIB, what is the correct Processor bd and system version for a E4419B ? do i have to reload the FW for the E4419B on this board ? according to the previous owner he had bought the board to repair a faulty E4418B and had uploaded the E4418B fw !
The E4419A and E4419B use the same firmware (currently A2.09.00).
The meters identify themselves as A or B by some data stored in nonvolatile memory on the CPU board. You can set the proper values with some special service GPIB commands. Take a look at this service note for a list of commands to send:
http://cp.literature.agilent.com/litweb ... 9B-02A.pdf
(see the second page for the commands)