Agilent Technologies 4294A, Programming Manual

Page: 82 / 518

82 Chapter 6
Reading/Writing Measurement Data
Internal Data Processing
Data trace array
The data trace array contains data that appears on the screen as data trace, that is, the result
of measurement parameter conversion and arithmetic performed on the data array. Each
result is stored as a complex number, regardless of whether the data is a scalar or vector.
Therefore, if the data is a scalar, “0” is stored in the imaginary number part. Use the
following commands to read or write the data trace array.
• “OUTPDTRC?” on page 378
• “OUTPDTRCP?” on page 379
• “INPUDTRC” on page 322
Memory trace array
The memory trace array contains data that appears on the screen as memory trace, that is,
the result of parameter conversion performed on the memory array. Use the following
commands to read the memory trace array. Note that you cannot write any part of the
memory trace array.
• “OUTPMTRC?” on page 388
• “OUTPMTRCP?” on page 389
Calibration data array
The calibration data array contains open, short and load measurement data used for
calculation of the user calibration coefficient. These data are stored as complex numbers.
Three different types of arrays are available to choose from depending on the type of
measurement data (open, short, or load data).
Use the following commands to read or write the calibration data array.
• “OUTPCALC{1-3}?” on page 373
• “INPUCALC{1-3}” on page 320
The calibration coefficient is calculated and stored in volatile memory (RAM) when all
arrays are written.
Array
Number
*1
Stored Data
1 Open measurement data (G-B) for user calibration coefficient calculation
2 Short measurement data (R-X) for user calibration coefficient calculation
3 Load measurement data (R-X) for user calibration coefficient calculation
*1.This number corresponds to the number provided at the end of the command.