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Preparation for Accurate Measurement (Executing Correction)
Overview of Correction Function
5
Preparation for Accurate Measurement (Executing
Correction)
This chapter gives an overview and the operational procedures of the different
types of correction function available in the E4981A.
Overview of Correction Function
The E4981A provides several types of corrections such as OPEN, SHORT,
LOAD, OFFSET, and Cable correction. This section explains various types of
corrections available in the E4981A.
OPEN/SHORT/LOAD/OFFSET correction
The E4981A provides four types of correction functions: OPEN correction,
SHORT correction, LOAD correction, and OFFSET correction. The following
table gives a brief description of each correction function:
Type of correction
Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter
Description
Corrects errors caused by parallel stray admittance of the test
fixture. This correction is based on the results of admittance
measurement in the OPEN state which is performed in advance.
OPEN correction
OPEN correction can be performed at any frequency (120 Hz/
1 kHz/1 MHz) and the correction data remains valid for all
measurement frequencies.
Corrects errors caused by series residual impedance of the test
fixture. This correction is based on the results of impedance
measurement in the SHORT state which is performed in advance.
SHORT correction
SHORT correction can be performed at any frequency (120 Hz/
1 kHz/1 MHz) and the correction data remains valid for all
measurement frequencies.
Corrects complex errors related to amplitude/phase errors, the
scanner, and other factors caused by the cable and test fixture.
This correction is based on the results of impedance
measurement of the standard having a known value which is
performed in advance.
LOAD correction
LOAD correction is frequency dependent and the correction data
remains valid only for the measurement frequency at which the
LOAD correction is applied. If the frequency is changed, the LOAD
correction needs to be performed again.
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