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54540C failed a/d cal

Question asked by gpontis on May 19, 2009
Latest reply on May 20, 2009 by ko2054
54540C self cal reports:

FAILED A/D CAL CHAN 1   0000 0000 0001 0000

When I switch 50 ohm input impedance on chan 1 in and out, there is a soft relay click ( not the speaker ) but it is not as distinct as when I do the same on channels 2-4. A DVM connected to the input shows 1M on chan 1 all the time. Is the 50 ohm switching related to the failed A/D cal or is it a separate problem ?

Is this something that is practical to repair ? I do have a 54522A that could be cannabalized if this is a simple plug-in module swap, but since the 522A is fully functional that would be a shame.

Any help or suggestions would be appreciated.

George  

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