RFmx TD-SCDMA 19.1 Help

Edition Date: October 2019

Part Number: 375493H-01

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RFmx TD-SCDMA 19.1 Help
RFmx TD-SCDMA 20.0 Help
Visual Basic (Declaration)
Public Function SetFftWidth ( _
	channelName As String, _
	value As Double _
) As Integer
public int SetFftWidth(
	string channelName,
	double value


Identifies the channel to which the settings must be applied. Specify an empty string as the value of this parameter.
Specifies the FFT width of the device.

Return Value

Type: System.Int32
Returns the status code of this method. The status code either indicates success or describes an error or warning condition.


This method maps to the RFmxInstr_SetFftWidth() function in C.


NOTE: The maximum FFT width for your device is constrained to 50 MHz or 25 MHz, depending on the digitizer option you purchased.

NOTE: You can use the FFT width method with in-band retuning. For more information about in-band retuning, refer to the SetDownconverterCenterFrequency method. The RF device treats the device instantaneous bandwidth as the effective real-time bandwidth of the signal path. The span specifies the frequency range of the computed spectrum. A vector signal analyzer can acquire a bandwidth only within the device instantaneous bandwidth frequency. If the span you choose is greater than the device instantaneous bandwidth, the RF device obtains multiple acquisitions and combines them into a single spectrum. By specifying the FFT width, you can control the specific bandwidth obtained in each signal acquisition.

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