RFmxWCDMA_ModAccFetchIQImpairmentsArray
- Updated2024-10-14
- 2 minute(s) read
RFmxWCDMA_ModAccFetchIQImpairmentsArray
int32 __stdcall RFmxWCDMA_ModAccFetchIQImpairmentsArray (niRFmxInstrHandle instrumentHandle, char selectorString[], float64 timeout, float64 IQOrignOffset[], float64 IQGainImbalance[], float64 IQQuadratureError[], int32 arraySize, int32* actualArraySize);
Purpose
Fetches the array of I/Q origin offsets, an array of I/Q gain imbalances, and an array of I/Q quadrature errors corresponding to all the carriers in the ModAcc measurement. The array elements represent result of each carrier in the measurement.
Parameters
| Input | ||
| Name | Type | Description |
| instrumentHandle | niRFmxInstrHandle | Specifies the instrument session. The RFmx driver obtains this parameter from the RFmxWCDMA_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. Example: "signal::sig1" "result::r1" "signal::sig1/result::r1" You can use the RFmxWCDMA_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. |
| arraySize | 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. |
| Output | ||
| Name | Type | Description |
| IQOrignOffset | float64[] | Returns the array of the I/Q origin offset, I/Q gain imbalance and I/Q quadrature error for a carrier in the ModAcc measurement. Use "carrier<n>" as the selector string to read results from this function. |
| IQGainImbalance | float64[] | Returns the array of I/Q gain imbalance values of the composite signal. This value is expressed in dB.
The I/Q gain imbalance is the ratio of the magnitude of the I component to the Q component of the I/Q signal being measured.
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| IQQuadratureError | float64[] | Returns the array of I/Q quadrature error values of the composite signal.
This value is expressed in degrees. Quadrature error is a measure of the error in the phase between I and Q components of the signal being measured.
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| actualArraySize | int32* | Returns the actual size of the array, if you pass NULL to all output array parameters, and set the arraySize parameter to 0. |
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 RFmxWCDMA_GetError function. The general meaning of the status code is as follows:
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