Specifies whether the noise calibration and measurement is performed manually by the user or automatically by RFmx. Refer to the measurement guidelines section in the Noise Compensation Algorithm topic for more information.

You do not need to use a selector string to configure or read this property for the default signal instance. Refer to the Selector Strings topic for information about the string syntax for named signals.

The default value is Auto.

Remarks

The following table lists the characteristics of this property.

Short Name Spectrum Noise Cal Mode
Data type ci32.png
Permissions Read/Write
High-level VIs N/A
Resettable Yes
Manual 0

When you set the Spectrum Meas Mode property to Calibrate Noise Floor, you can initiate instrument noise calibration for the spectrum measurement manually. When you set the Spectrum Meas Mode property to Measure, you can initiate the spectrum measurement manually.
Auto 1

When you set the Spectrum Noise Comp Enabled property to True, RFmx sets the Input Isolation Enabled property to Enabled and calibrates the intrument noise in the current state of the instrument. RFmx then resets the Input Isolation Enabled property and performs the spectrum measurement, including compensation for noise from the instrument. RFmx skips noise calibration in this mode if valid noise calibration data is already cached. When you set the Spectrum Noise Comp Enabled property to False, RFmx does not calibrate instrument noise and performs only the spectrum measurement without compensating for the noise from the instrument.