E4990A Help
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When the measurement port is extended by 1 meter
with the four-terminal pair configuration, neither user
calibration nor port extension compensation is required for
measurement (they cannot be performed).
Fixture Compensation When the 16451B/16334A is Used
When you perform only the fixture OPEN compensation and fixture SHORT
compensation, follow the normal fixture compensation procedures
described in Fixture Compensation.
If you perform the LOAD compensation in addition to the OPEN and SHORT
compensations, set the standard values as described below in accordance
with the procedures in Defining the Standard Values for Fixture
Compensation.
For the 16334A over 3 MHz measurement, the load compensation is
recommended according to the following procedure. The proportional error
factor in the additional error caused by the fixture is in proportion to the
frequency squared. Therefore, the error increases greatly as the frequency
goes high.
1. Set the 100 Ω SMD resistor on the direct connection type fixture (like
16034G), and perform measurement at 3 MHz to determine the
value of the 100 Ω SMD resistor.
2. Set the measured resistance and inductance values to the instrument
as load value.
3. Perform load compensation of the 16334A.
For 16451B, see the table of load value in 2.4.5 Operation Method of
http://cp.literature.agilent.com/litweb/pdf/5980-2862EN.pdf
.
Other topics about Calibration
C. Calibration for Four-Terminal Pair, 2-m Extension
This section describes the calibration procedures to follow when the four-
terminal pair port of the E4990A is extended with a 2-meter-long four-
terminal pair configuration and the device is connected to the cable’s end
with a minimal connection.
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