Agilent Technologies 4294A Operating Manual page 152

Calibration
F. Calibration When a Probe Adapter is Connected to the 42941A
See "Adapter Setting" on page 67 for adapter selection.
Step 2. When performing calibration at the 3.5-mm port of the 42941A with a user-defined
calibration kit, perform user calibration with the proper calibration kit. Refer to "User
Calibration" on page 147 for the user calibration procedure.
User calibration is not required when you do not use a user-defined calibration kit.
Step 3. Connect a probe adapter to the 3.5-mm port of the 42941A Impedance Probe. See the
operation manual of the 42941A for the appropriate connection setup.
Step 4. Perform the fixture compensation at the device contacts (electrodes) of the probe adapter.
See "Fixture Compensation" on page 151 for the fixture compensation procedure.
NOTE When a probe adapter is connected to the 3.5-mm port of a 42941A that is also connected
to the four-terminal pair port of the Agilent 4294A, port extension compensation is not
required.
144 Chapter 6