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85070 Probe Restoration

Question asked by DoctorT on Nov 16, 2010
Just ran into an issue that turned out to be a "damaged " probe.

The problem was that the probe would not make correct contact to the shorting block.

VNA characteristics appear correct for the air and water measurements during calibration.

Under the microscope, we can see numerous mechanical flaws.

We are planning to polish the probe face with standard metallurgical abrasive sequence to restore the probe face planarity. We will try to remove minimal material.

Is there a recommended procedure for restoring the probe faces? Does our proposed solution seem reasonable? Can't find any references to this situation on the web or Agilent site.