Other topics about Reading-Writing Measurement Data
The following figure provides an overview of the E5061B's internal data processing flow.
E5061B's data processing flow
A corrected data array contains the corrected data obtained by performing error correction and port extension compensation (calibration) operations on the raw measured data of S parameter specified for each trace of each channel. Each data element is stored as a complex number (Re/Im).
The instrument retains 16 corrected data arrays at maximum, each of which is associated with one of the 4 traces contained in one of the 4 channels (4 × 4 = 16). To read/write one of the corrected data arrays, use the following command:
:CALC{1-4}:DATA:SDAT
When the :CALC{1-4}:MATH:MEM command is executed on a particular corrected data array, its copy is stored into the corrected memory array corresponding to that corrected data array.
The instrument retains 16 corrected memory arrays at maximum, each of which is associated with one of the 4 traces contained in one of the 4 channels (4 × 4 = 16). To read/write one of the corrected data arrays, use the following command:
:CALC{1-4}:DATA:SMEM
A formatted data array contains the formatted data (values to be displayed) obtained by performing data math operations, measurement parameter conversion, and smoothing on a particular corrected data array. Regardless of the data format, it contains two data elements per measurement point as shown in the following table:
|
Data element |
Data element (secondary value) |
|
|
log magnitude |
log magnitude |
Always 0 |
|
Phase |
Phase |
Always 0 |
|
Group delay |
Group delay |
Always 0 |
|
Smith chart (Lin) |
Liner magnitude |
Phase |
|
Smith chart (Log) |
log magnitude |
Phase |
|
Smith chart (Re/Im) |
Real part of a complex number |
Imaginary part of a complex number |
|
Smith chart (R+jX) |
Resistance |
Reactance |
|
Smith chart (G+jB) |
Conductance |
Susceptance |
|
Polar (Lin) |
Liner magnitude |
Phase |
|
Polar (Log) |
log magnitude |
Phase |
|
Polar (Re/Im) |
Real part of a complex number |
Imaginary part of a complex number |
|
Liner magnitude |
Liner magnitude |
Always 0 |
|
SWR |
SWR |
Always 0 |
|
Real number |
Real part of a complex number |
Always 0 |
|
Imaginary number |
Imaginary part of a complex number |
Always 0 |
|
Expanded phase |
Expanded phase |
Always 0 |
|
Positive phase |
Positive phase |
Always 0 |
The instrument retains 16 formatted data arrays at maximum, each of which is associated with one of the 4 traces contained in one of the 4 channels (4 × 4 = 16). To read/write one of the formatted data arrays, use the following command:
:CALC{1-4}:DATA:FDAT
A formatted memory array contains the formatted data (values to be displayed) obtained by performing data math operations, measurement parameter conversion, and smoothing on a particular corrected memory array.
The instrument retains 16 formatted memory arrays at maximum, each of which is associated with one of the 4 traces contained in one of the 4 channels (4 × 4 = 16). To read/write one of the formatted memory arrays, use the following command:
:CALC{1-4}:DATA:FMEM
A stimulus data array contains the stimulus values for all measurement points.
The instrument retains 4 stimulus data arrays at maximum, each of which is associated with one of the 4 channels. Stimulus data arrays are read-only. To retrieve one of the stimulus data arrays, use the following command:
:SENS{1-4}:FREQ:DATA?
A calibration coefficient data array contains the calibration coefficients calculated based on the results of measurement performed with standard devices.
The instrument retains 12 calibration coefficient data arrays at maximum, each of which is associated with each channel. Commands are available for reading or writing calibration coefficient data arrays. To read or write, first use the following command:
:SENS{1-4}:CORR:COEF
If any calibration coefficient is interpolated, the interpolated calibration coefficient data array is retrieved. Once a calibration coefficient data array has been written, execute the command SENS{1-4}:CORR:COEF:SAVE to validate it.