Configures the bandwidth for the I/Q measurement.

Syntax

int32 __stdcall RFmxSpecAn_IQCfgBandwidth(niRFmxInstrHandle instrumentHandle, char selectorString[], int32 bandwidthAuto, float64 bandwidth)

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 RFmxSpecAn_BuildSignalString function to build the selector string.

bandwidthAuto[in]int32

This parameter specifies whether the measurement computes the minimum acquisition bandwidth. The default value is True.

Name

Value

Description

RFMXSPECAN_VAL_IQ_AUTO_BANDWIDTH_FALSE

0 (0x0)

The measurement uses the value of the RFMXSPECAN_ATTR_IQ_BANDWIDTH attribute as the minimum acquisition bandwidth.

RFMXSPECAN_VAL_IQ_AUTO_BANDWIDTH_TRUE

1 (0x1)

The measurement uses 0.8 * sample rate as the minimum signal bandwidth.

bandwidth[in]float64

This parameter specifies the minimum acquisition bandwidth, in Hz, when you set the Bandwidth Auto parameter to False. The default value is 1 MHz.

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