RFmxWLAN_AnalyzeNWaveformsIQ
- Updated2025-04-08
- 3 minute(s) read
Performs the enabled measurements on the I/Q complex waveform(s) that you specify in IQ parameter. Call this function after you configure the signal and measurement attributes. You can fetch measurement results using the Fetch functions or result attributes in the attribute node. Use this function only if the RFMXINSTR_ATTR_RECOMMENDED_ACQUISITION_TYPE attribute value is either IQ or IQ or Spectral. When using the Analysis-Only mode in RFmxWLAN, the RFmx driver ignores the RFmx hardware settings such as reference level and attenuation. The only RF hardware settings that are not ignored are the center frequency and trigger type, since it is needed for spectral measurement traces as well as some measurements such as ModAcc, ACP, and SEM.
Query the Recommended Acquisition Type attribute from the RFmxInstr Attribute after calling the RFmxWLAN_Commit function.
Syntax
int32 __stdcall RFmxWLAN_AnalyzeNWaveformsIQ(niRFmxInstrHandle instrumentHandle, char selectorString[], char resultName[], float64 x0[], float64 dx[], NIComplexSingle iq[], int32 iqSize[], int32 arraySize, int32 reset)
Parameters
| Name | Direction | Type | Description |
|---|---|---|---|
| instrumentHandle | [in] | niRFmxInstrHandle | This parameter specifies the RFmx session refnum. Instrument Handle In is obtained from the RFmxInstr_Initialize function or the RFmxInstr_InitializeFromNIRFSASessionArray function. |
| selectorString | [in] | char | This parameter specifies the signal name and result name. The result name can either be specified through this input or the Result Name parameter. If you do not specify the signal name, the default signal instance is used. If you do not specify the result name in this parameter, either the result name specified by the Result Name parameter or the default result instance is used. The default value is "" (empty string). |
| resultName | [in] | char | This parameter specifies the name to be associated with measurement results. Provide a unique name, such as "r1" to enable fetching of multiple measurement results and traces. This input accepts the result name with or without the "result::" prefix. The default value is "" (empty string) which refers to default result instance. |
| x0 | [in] | float64 | This parameter specifies the start time of the input y array. This value is expressed in seconds. |
| dx | [in] | float64 | This parameter specifies the time interval between the samples in the input y array. This value is expressed in seconds. The reciprocal of dx indicates the I/Q rate of the input signal. |
| iq | [in] | NIComplexSingle | This parameter specifies the waveform array where each element contains data for a complex waveform including start, delta, and actual values. |
| iqSize | [in] | int32 | Specifies the size of n waveforms |
| arraySize | [in] | int32 | Specifies the size of the array. Set the arraySize parameter to 0 to get the size of all the arrays in the actualArraySize parameter. |
| reset | [in] | int32 | This parameter resets measurement averaging. If you enable averaging, set this parameter to TRUE for first record and FALSE for subsequent records. |
Returns
Returns the status code of this operation. The status code either indicates success or describes an error or warning condition. Examine the status code from each call to an RFmx function to determine if an error has occurred.
To obtain a text description of the status code and additional information about the error condition, call the RFmxWLAN_GetError function.
The general meaning of the status code is as follows:
Value | Meaning |
|---|---|
0 | Success |
Positive Values | Warnings |
Negative Values | Errors |