VNA Help
Click here to see this page in full context
Read-only
About Gain Compression

GetDataIm Method

Description

For a specified data point, returns the imaginary part of the specified Gain Compression data. If correction is on, corrected data are returned. Otherwise, raw data are returned. Can be used with Smart and 2D sweeps.

  • For SMART sweep, the number of data points that are returned is always going to be the number of iteration sweeps. Use  to determine the number of iteration sweeps.

  • For 2D sweeps, the number of data points returned / freq may vary. Learn more.

 VB Syntax

data = gca.GetDataIm stim, dPoint, param

Variable

(Type) - Description

data

Variant array in which to store returned measurement data.

gca

A GainCompression (object)

stim

(NAGCAIndexSelect)

  • naFrequencySelect - for the specified frequency data point, returns all of the measured data for each power stimulus.

  • naPowerSelect - for the specified power data point, returns all of the measured data for each frequency stimulus.

dPoint

Data point (Frequency or Power) for which data is returned.

param

Parameter of data to return. Not case-sensitive. Choose from:

  • "pin"  - input power at each data point.

  • "pout" - output power at each data point.

  • "gain" - device gain (S21) at each data point.

  • "inputmatch" - input match (S11) at each data point.

  • "DeltaGain" - Measured Gain (watts) / Ref Gain (watts). Learn more.

  • "AI1" and "AI2" - ADC measurements at the specified compression level. Learn more.

Return Type

Variant Array

Default

Not Applicable

Examples

For the fifth frequency data point, returns 'Power Output' imaginary (phase) data from all power stimulus values. If there are 30 power sweep points, 30 values are returned.

data = gca.GetDataIm naFrequencySelect, 5, "pout"

For the 30th stimulus power data point, returns 'Power Output' imaginary (phase) data from all frequency stimulus values. If there are 201 frequency sweep points, 201 values are returned.

data = gca.GetDataIm naPowerSelect, 30, "pout"

Note: For 2D sweeps, the number of data points returned / freq may vary. Learn more.

C++ Syntax

HRESULT GetDataIm(tagNAGCAIndexSelect index_select, int index,BSTR data_name, VARIANT* pData);

Interface

IGainCompression