Specifies how to obtain the lowest noise floor or faster measurement speed.

PXIe-5665 Sets the FFT Width property to take narrower bandwidth acquisitions and avoid digitizer spurs. Uses IF filters to reduce the noise floor for frequencies below 80 MHz.
PXIe-5644/5645/5646, PXIe-5840/5841/5842 Returns the best possible spectrum.
PXIe-5668 Returns the best possible spectrum. To provide the best spectrum measurement, the acquisition is reduced to 100 MHz segments for any center frequency.
Other devices This property is ignored.
Note Some measurements, such as Spurious Emissions enable the Cleaner Spectrum property by default. You can speed up those measurements by disabling the Cleaner Spectrum property.

You do not need to use a selector string if you want to configure this property for all signal instances. Specify the signal name in the selector string if you want to configure or read that signal instance. Refer to the Selector Strings topic for information about the string syntax.

The default value is Disabled.

Supported devices: PXIe-5665, PXIe-5668, PXIe-5644/5645/5646, PXIe-5840/5841/5842/5860

Remarks

The following table lists the characteristics of this property.

Short Name Cleaner Spectrum
Data type ci32.png
Permissions Read/Write
High-level VIs N/A
Resettable Yes
Disabled 0

Disable this property to get faster measurement speed.

Enabled 1

Enable this property to get the lowest noise floor and avoid digitizer spurs.