Chapter 6 155
Calibration
Selecting Calibration/Compensation Data Points
6. Calibration
Selecting Calibration/Compensation Data Points
You can choose the type of frequency points to use in obtaining user calibration data and
fixture compensation data as follows:
Step 1. Press the
[Cal] key to display the Calibration Menu.
Step 2. Press the
COMP POINT [ ] key to select the measurement points used for user calibration
or those for fixture compensation (pressing the key toggles your selection).
NOTE The calibration/compensation data point selection set by the COMP POINT [ ] key is
common to user calibration and fixture compensation. You cannot set the selection for
either one of them independently.
When the selection of calibration/compensation data points is changed after completing
user calibration or fixture compensation, the obtained user calibration or fixture
compensation data become invalid.Therefore, do not change the selection of the calibration
(compensation) data points after completing user calibration or fixture compensation.
Softkey Label Calibration/Compensation Points
COMP POINT [FIXED] Obtain calibration/compensation data at fixed
frequency points
1
covering the entire
frequency range of the 4294A. In device
measurement, user calibration or fixture
compensation is applied to each measurement
point by using interpolation. Even if the
measurement points are changed by altering
the sweep setups, you don't need to retake the
calibration or compensation data.
1. See “List of fixed calibration/compensation frequency points” on page 156.
COMP POINT [USER]
Obtain calibration/compensation data at the
same frequency points as used in actual device
measurement, which are determined by the
sweep setups. Each set of
calibration/compensation data is applied to
each measurement at the same point. If
measurement points are changed by altering
the sweep setups, calibration/compensation
data become invalid and calibration or
compensation data acquisition is again
required.
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