Specifications

126 Chapter 6
Read and Write Measurement Data
Internal Data Flow
Calibration Coefficient Arrays
The calibration coefficient arrays contain calibration coefficients in the complex format.
These were calculated using a calibration data array. As shown in the following table, there
are six arrays containing calibration coefficients: A1, B1, C1, A2, B2, and C2.
Use the following GPIB command to read or write a calibration coefficient array.
• DATA:CCO{1-6} on page 346
For segment sweep, the following GPIB command can be used to read or write a
calibration coefficient array for each specified segment.
• DATA:SEGM{1-16}:CCO{1-6} on page 351
NOTE Before writing all of the calibration coefficient arrays, set the measurement frequency and
oscillator level to the same values specified when they were read and enable the calibration
function. Note that if calibration is disabled, it cannot be enabled until Open/Short/Load
calibration data are measured. Therefore, calibration data must be measured before
calibration coefficient arrays are written. However, measuring actual calibration data is not
necessary. Accordingly, you can measure calibration data without connecting a calibration
standard and then enable calibration.
After performing measurement using the written calibration coefficient arrays, if stimulus
values are changed, the calibration coefficient arrays are written again, resulting in
incorrect measurement regardless of whether calibration is enabled or disabled.
Array
number
*1
Contained data
1 Calibration coefficient A1
2 Calibration coefficient B1
3 Calibration coefficient C1
4 Calibration coefficient A2
5 Calibration coefficient B2
6 Calibration coefficient C2
*1. This number corresponds to the number specified at the end of the com-
mand.