[Amps] help diagnosing a bad 8450a probe ?

[Peter Chadwick]

Dan said: 
> 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<
Have you checked the four Schottky diodes in the sampler? I've had funny answers like yours when one of them had died. BTW, you need to replace all four with a matched quad, not change just one.
73
Peter G3RZP