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

Syntax

RFMXINSTR_ATTR_CLEANER_SPECTRUM

Numeric Value

Data Type

Access

Applies To

37

int32

Read/Write

N/A

Remarks

Name (value)

Description

PXIe-5665

Sets the FFT Width attribute 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 attribute is ignored.

Note

Some measurements, such as Spurious Emissions enable the Cleaner Spectrum attribute by default. You can speed up those measurements by disabling the Cleaner Spectrum attribute.

You do not need to use a selector string if you want to configure this attribute 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 String 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

Name

Value

Description

RFMXINSTR_VAL_CLEANER_SPECTRUM_DISABLED

0 (0x0)

Disable this attribute to get faster measurement speed.

RFMXINSTR_VAL_CLEANER_SPECTRUM_ENABLED

1 (0x1)

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