RFmxDemod_CfgRF

RFmx Demod 19.1 Help

Edition Date: October 2019

Part Number: 374641M-01

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int32 __stdcall RFmxDemod_CfgRF (niRFmxInstrHandle instrumentHandle, char selectorString[], float64 centerFrequency, float64 referenceLevel, float64 externalAttenuation);

Purpose

Configures the RF properties of the signal specified by the selector string.

Parameters

Input
Name Type Description
instrumentHandle niRFmxInstrHandle Specifies the RFmx session. You can obtain this parameter from the RFmxDemod_Initialize function.
selectorString char[] Comprises the signal name. If you do not specify the signal name, the default signal instance is used.

Example:

""

"signal::sig1"

You can use the RFmxDemod_BuildSignalString function to build the selector string.
centerFrequency float64 Specifies the carrier frequency, in Hz, of the RF signal that needs to be acquired. The signal analyzer tunes to this frequency.
referenceLevel float64 Specifies the reference level, which represents the maximum expected power of the RF input signal. This value is expressed in dBm for RF devices and Vpk-pk for baseband devices.
externalAttenuation float64 Specifies the attenuation, in dB, of a switch (or cable) connected to the RF IN connector of the signal analyzer. For more information about attenuation, refer to the Attenuation and Signal Levels topic for your device in the NI RF Vector Signal Analyzers Help.

Return Value

Name Type Description
status int32 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

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