Configures the resolution bandwidth (RBW) filter of the carrier signal. Use "carrier<n>" as the selector string to configure this function.

Syntax

int32 __stdcall RFmxSpecAn_SEMCfgCarrierRBWFilter(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 and carrier number. If you do not specify the signal name, the default signal instance is used.
Example:
"carrier0"
"signal::sig1/carrier0"
You can use the RFmxSpecAn_BuildCarrierString2 function to build the selector string.

rbwAuto[in]int32

This parameter specifies whether the measurement computes the resolution bandwidth (RBW) of the carrier. Refer to the SEM topic for more details on RBW. The default value is True.

Name

Value

Description

RFMXSPECAN_VAL_SEM_CARRIER_RBW_AUTO_FALSE

0 (0x0)

The measurement uses the RBW that you specify in the RFMXSPECAN_ATTR_SEM_CARRIER_RBW_FILTER_BANDWIDTH attribute.

RFMXSPECAN_VAL_SEM_CARRIER_RBW_AUTO_TRUE

1 (0x1)

The measurement computes the RBW.

rbw[in]float64

This parameter specifies the bandwidth, in Hz, of the resolution bandwidth (RBW) filter used to sweep the acquired carrier signal, when you set the RBW Auto parameter to False. The default value is 10 kHz.

rbwFilterType[in]int32

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

Name

Value

Description

RFMXSPECAN_VAL_SEM_CARRIER_RBW_FILTER_TYPE_FFT_BASED

0 (0x0)

No RBW filtering is performed.

RFMXSPECAN_VAL_SEM_CARRIER_RBW_FILTER_TYPE_GAUSSIAN

1 (0x1)

The RBW filter has a Gaussian response.

RFMXSPECAN_VAL_SEM_CARRIER_RBW_FILTER_TYPE_FLAT

2 (0x2)

The RBW filter has a flat response.

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 RFmxSpecAn_GetError function.

The general meaning of the status code is as follows:

Value

Meaning

0

Success

Positive Values

Warnings

Negative Values

Errors