RFmxDemod_DDemodGetEqualizerInitialCoefficientsSplit
- Updated2025-10-13
- 2 minute(s) read
Gets the initial equalizer coefficients used by the digital demodulation measurement.
Syntax
int32 __stdcall RFmxDemod_DDemodGetEqualizerInitialCoefficientsSplit(niRFmxInstrHandle instrumentHandle, char selectorString[], float64 *x0, float64 *dx, float32 equalizerInitialCoefficientsI[], float32 equalizerInitialCoefficientsQ[], int32 arraySize, int32 *actualArraySize)
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. |
| selectorString | [in] | char[] | This parameter comprises of the signal name. If you do not specify the signal name, the default signal instance is used. The default value is "" (empty string). Example: "" "signal::sig1" You can use the RFmxDemod_BuildSignalString function to build the Selector String. |
| x0 | [out] | float64 * | This parameter this parameter always returns 0. |
| dx | [out] | float64 * | This parameter returns the spacing between the coefficients as a fraction of the symbol spacing. For example, if four coefficients correspond to one symbol, the spacing is 1/4. |
| equalizerInitialCoefficientsI | [out] | float32[] | This parameter Returns the real part of filter coefficients used as the equalizer initial coefficients. |
| equalizerInitialCoefficientsQ | [out] | float32[] | This parameter Returns the imaginary part of filter coefficients used as the equalizer initial coefficients. |
| 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. |
| actualArraySize | [out] | int32 * | Returns the actual size of the array, if you pass NULL to all output array parameters, and set the arraySize parameter to 0. |
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 RFmxDemod_GetError function.
The general meaning of the status code is as follows:
Value | Meaning |
|---|---|
0 | Success |
Positive Values | Warnings |
Negative Values | Errors |