Configures the RBW filter.

Syntax

int32 __stdcall RFmxWCDMA_ACPCfgRBWFilter(niRFmxInstrHandle instrumentHandle, char selectorString[], int32 rbwAuto, float64 rbw, int32 rbwFilterType)

Parameters

NameDirectionTypeDescription
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 specifies a Selector String comprising 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 RFmxWCDMA_BuildSignalString function to build the selector string.

rbwAuto[in]int32

This parameter specifies whether the measurement computes the RBW. The default value is True.
This parameter is valid only if you set the RBW Filter Type parameter to Gaussian or Flat.

If you set the RBW Filter Type parameter to FFT Based, the measurement calculates the RBW regardless of the value of this parameter.  |—|—|—| | RFMXWCDMA_VAL_ACP_RBW_AUTO_FALSE | 0 (0x0) | The measurement uses the RBW that you specify in the RFMXWCDMA_ATTR_ACP_RBW_FILTER_BANDWIDTH attribute. | | RFMXWCDMA_VAL_ACP_RBW_AUTO_TRUE | 1 (0x1) | The measurement calculates the RBW. |

rbw[in]float64

This parameter specifies the bandwidth of the RBW filter used to sweep the acquired signal when you set the RBW Auto parameter to False.
This parameter is valid only if you set the RBW Filter Type parameter to Gaussian or Flat. This value is expressed in Hz. The default value is 38.4 kHz.

rbwFilterType[in]int32

This parameter specifies the shape of the digital RBW filter. The default value is Gaussian.

Name

Value

Description

RFMXWCDMA_VAL_ACP_RBW_FILTER_TYPE_FFT_BASED

0 (0x0)

No RBW filtering is used.

RFMXWCDMA_VAL_ACP_RBW_FILTER_TYPE_GAUSSIAN

1 (0x1)

An RBW filter with a Gaussian response is applied.

RFMXWCDMA_VAL_ACP_RBW_FILTER_TYPE_FLAT

2 (0x2)

An RBW filter with a flat response is applied.

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 RFmxWCDMA_GetError function.

The general meaning of the status code is as follows:

Value

Meaning

0

Success

Positive Values

Warnings

Negative Values

Errors