RFmxTDSCDMA_CDAFetchIQImpairments
- Updated2024-10-14
- 2 minute(s) read
RFmxTDSCDMA_CDAFetchIQImpairments
int32 __stdcall RFmxTDSCDMA_CDAFetchIQImpairments (niRFmxInstrHandle instrumentHandle, char selectorString[], float64 timeout, float64* IQOriginOffset, float64* IQGainImbalance, float64* IQQuadratureError);
Purpose
Returns the I/Q origin offset, I/Q gain imbalance, and I/Q quadrature error.
Parameters
| Input | ||
| Name | Type | Description |
| instrumentHandle | niRFmxInstrHandle | Specifies the instrument session. The RFmx driver obtains this parameter from the RFmxTDSCDMA_Initialize function. |
| selectorString | char[] | Specifies a selector string comprising of the signal name and result name. If you do not specify the signal name, the default signal instance is used. If you do not specify the result name, the default result instance is used. examples: "" "signal::sig1" "result::r1" "signal::sig1/result::r1" You can use the RFmxTDSCDMA_BuildSignalString function to build the selector string. |
| timeout | float64 | Specifies the timeout for fetching the specified measurement. This value is expressed in seconds. Set this value to an appropriate time, longer than expected for fetching the measurement. A value of -1 specifies that the function waits until the measurement is complete. |
| Output | ||
| Name | Type | Description |
| IQOriginOffset | float64* | Returns the I/Q origin offset of the composite signal, averaged over all measured slots. This value is expressed in dB.
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| IQGainImbalance | float64* | Returns the I/Q gain imbalance of the composite signal, averaged over all measured slots. This value is expressed in dB.
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| IQQuadratureError | float64* | Returns the I/Q quadrature error of the composite signal, averaged over all measured slots. This value is expressed in degrees.
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Return Value
| Name | Type | Description | ||||||||
| status | int32 | 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 RFmxTDSCDMA_GetError function. The general meaning of the status code is as follows:
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