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[Amps] help diagnosing a bad 8450a probe ?

To: amps <>
Subject: [Amps] help diagnosing a bad 8450a probe ?
From: Dan Sawyer <>
Date: Thu, 08 Dec 2005 22:08:02 -0800
List-post: <>

I have an 8405a with a bad probe. The unit makes it through most of the 
calibration until the noise cancellation step. One board works and comes 
in at less then 5 mv. However one shows a 1V peak to peak distorted sine 
like wave. This probe actually works, however due to the fault it has a 
phase frequency error. This error is of course disaster for a phase meter.

Does anyone have experience in diagnosing these probes?

Does anyone have a lead as to what part to suspect?

Thanks - Dan
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