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3458A A2 board questions

Question asked by C2inAZ on Feb 9, 2012
Latest reply on Feb 10, 2012 by C2inAZ
Greetings one and all,

This is my first post, so I'll try to make it a good one.

I am a DoD contractor working at a precision measurement lab in Phoenix.  I have a 3458A that I am upgrading with a 03458-91000 A2 board, replacing the 03458-66502 board currently installed.  It is my understanding that this will give my 3458A the Opt 002 Hi-Stability Reference, 4ppm.  After swapping out the board and warming up the unit, I initiated ACAL ALL.  During the AC portion of the ACAL, I receive this error: "204, HARDWARE FAILURE, AC VOS DAC CONVERGENCE: 1837035519."  After doing research, I found that this error (204) pertains to the card I just installed.  I double-checked all the connections, re-ran ACAL and got the same error.  I put the old card back in, ran ACAL and it worked fine.  My question is; am I missing something?  Is there a software or some other kind of update that needs to be input into the unit, or is my 91000 A2 board a dud?

Thanks in advance for your help.  

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