Keysight E4990A - User Calibration

E4990A Help
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2. Perform the user calibration at the other end of the extended 3.5-
mm port of the 42941A Impedance Probe. You can use either the
calibration kit supplied or a user-defined calibration kit. See User
Calibration for the user calibration procedure.
3. Set the port extension value in electrical length or delay time, which
is equivalent to the electrical length between the user calibration
plane and the device contacts of the test fixture, in accordance with
Port Extension Compensation.
In measurements using the E4990A, the electrical length
(delay time) of a 42942A dedicated test fixture (such as 16092A)
and 42941A’s dedicated probe adapter can be regarded as 0.
4. Perform fixture compensation at the device contacts of the test
fixture. See Fixture Compensation for the fixture compensation
procedure.
If user calibration in step 2 cannot be performed for
some reason, set the port extension value in electrical length or
delay time, which is equivalent to the electrical length between
the 3.5-mm port of the 42941A and the device contacts of the
test fixture, in place of steps 2 and 3, in accordance with Port
Extension Compensation.
Other topics about Calibration
User Calibration
• User Calibration Procedure
• Turning User Calibration On/Off
• Defining Standard Values for User Calibration
Other topics about Calibration
User calibration can be performed only when “42942A Terminal Adapter
(7mm 42942A / 42942A Extension)” or “42941A Impedance Probe (PROBE
42941A / 42941A Extension)” is selected in the adapter selection.
User Calibration Procedure
Perform user calibration as follows:
User calibration consists of three calibration data
acquisition procedures: OPEN, SHORT, and LOAD, and you must
obtain all three types of calibration data when performing user