3.5 Basic Operations
3-55 ZM2376
Setting of correction lower and upper limit frequencies
(Common to OPEN / SHORT / LOAD correction)
For the global correction, you can set the lower and upper limit frequencies for correction.
The initial values are 40Hz for the correction lower limit frequency and 2MHz for the correction
upper limit frequency.
If the correction is not executed for the unused frequency, the measurement time of correction value
can be shortened.
The lower and upper limit frequencies set for the global correction are common to the OPEN,
SHORT, and LOAD corrections. The following describes the operation procedure in the OPEN
correction menu, and the same procedure can be used for the SHORT and LOAD corrections.
_SHIFT_
+ [OPEN] >> OPEN correction menu
For the global correction, the lower and upper limit frequencies are
displayed.
OFF|ON Correction frequency range
OPEN Correction:OFF 100Hz - 1.0MHz Current setting
4) LowFREQ 5) UppFREQ <PREV Options (second page)
LowFREQ >> Correction lower limit frequency setting menu
Lower Frequency = 100Hz Current setting
1mHz to 100kHz Upper >= Lower*2 Available ranges
Set the lowest measurement frequency to be used.
The lower and upper limit frequencies can be set with two significant digits.
If the upper limit < the lower limit × 2, the upper limit is automatically set to the lower limit × 2.
If a setting is made or the EXIT operation is performed, one-previous menu comes back.
UppFREQ >> Correction upper limit frequency setting menu
Upper Frequency = 1.0MHz Current setting
2kHz to 5.5MHz Lower <= Upper/2 Available ranges
Set the highest measurement frequency to be used.
If the lower limit > the upper limit / 2, the lower limit is automatically set to the upper limit / 2
(truncated).
In the global correction, the correction value is measured at the direct correction points required to
execute the correction in the range between the specified lower and upper limit frequencies. At other
direct correction points, the correction value is retained without being updated. If the frequency range
is extended, measure the correction value again. Otherwise, the interpolated correction value may be
incorrect.
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