Keysight E4980AL - The Correction Functions of the E4980 A;AL Are Operated as Follows

114 Keysight E4980A/AL Precision LCR Meter
Configuring Measurement Conditions (Display and Function Related Settings)
CORRECTION page
4-
The correction functions of the E4980A/AL are operated as follows:
On/off setting in OPEN,
SHORT and LOAD fields
OFF ON
Open/short correction at all
frequency points
Not
Performed
Open/short correction at 51 preset
frequency points is performed.
Correction at other frequency points is
performed by using interpolation based
on the correction data at the preset
frequencies adjacent to the test
frequency.
Open/short/load correction
at user-specified spot
frequency points
Not
Performed
Open/short/load correction at
user-specified spot frequency points is
performed in place of open/short
correction at all frequency points when
test frequency is identical with one of
the user-specified spot frequency
points.