Gets or sets the margin NI-RFSA adds to the ReferenceLevel property. The margin helps to avoid clipping and overflow warnings if the input signal exceeds the configured reference level.

Syntax

Namespace: NationalInstruments.ModularInstruments.NIRfsa

public double ReferenceLevelHeadroom { get; set; }

Remarks

The default value for the PXIe-5830/5831/5832 is 1 dB. The default value for the PXIe-5840 is 0 dB.

NI-RFSA configures the input gain to avoid clipping and associated overflow warnings as long as the instantaneous power of the input signal remains within the reference level plus the reference level headroom.If you know the input power of the signal precisely or have already included margin in the reference level, you may be able to improve the signal-to-noise ratio by reducing the reference level headroom.

Exceptions

TypeDescription
System.ObjectDisposedException

The ReferenceLevelHeadroom property was accessed after the associated NIRfsa object was disposed.