RFmxCDMA2k_QEVMFetchIQImpairments
- Updated2024-10-14
- 2 minute(s) read
RFmxCDMA2k_QEVMFetchIQImpairments
int32 __stdcall RFmxCDMA2k_QEVMFetchIQImpairments (niRFmxInstrHandle instrumentHandle, char selectorString[], float64 timeout, float64* meanIQOriginOffset, float64* meanIQGainImbalance, float64* meanIQQuadratureError, float64* maximumIQOriginOffset, float64* maximumIQGainImbalance, float64* maximumIQQuadratureError);
Purpose
Returns the measured I/Q impairments.
Parameters
| Input | ||
| Name | Type | Description |
| instrumentHandle | niRFmxInstrHandle | Specifies the instrument session. The RFmx driver obtains this parameter from the RFmxCDMA2k_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 RFmxCDMA2k_BuildSignalString function to build the selector string. |
| timeout | float64 | Specifies the timeout, in seconds, for fetching the specified measurement. 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 |
| meanIQOriginOffset | float64* | Returns the mean averaged origin offset of the received signal. This value is expressed in dB.
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| meanIQGainImbalance | float64* | Returns the mean I/Q gain imbalance of the received signal. This value is expressed in dB.
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| meanIQQuadratureError | float64* | Returns the mean I/Q quadrature error (phase imbalance) of the received signal. This value is expressed in degrees.
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| maximumIQOriginOffset | float64* | Returns the maximum origin offset of the received signal. This value is expressed in dB.
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| maximumIQGainImbalance | float64* | Returns the maximum I/Q gain imbalance of the received signal. This value is expressed in dB.
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| maximumIQQuadratureError | float64* | Returns the maximum I/Q quadrature error (phase imbalance) of the received signal. 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 RFmxCDMA2k_GetError function. The general meaning of the status code is as follows:
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