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I am having problems calibrating my test fixture for the Agilent 4294A Impedance Analyzer. The open measurement always works, but with the short measurement I always get the error message "Bridge Unbalanced".

The same problem was described a few years ago (https://community.keysight.com/thread/4715), but never answered.

I changed all parameters like amplitude, frequency, bandwidth etc., but without success. Does anyone have an idea what the problem is or what you could do about it?

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2 Answers 2

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I found the problem. There was a broken fuse on the DC power source board A4. I renewed it (just a few cents) and now the device is working again.

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    \$\begingroup\$ Excellent hint, thank you! Replacing the fuse cured our 4294A too that showed the "unbalanced bridge" issue. \$\endgroup\$
    – Murmel
    Commented Nov 9, 2022 at 12:30
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Ok, it's going to be an invalid setup/value for the short compensation.

Take a look at this answer at Keysight.

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