Reference Level Headroom Property

RFmx Demod 19.1 Help

Edition Date: October 2019

Part Number: 374641M-01

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Short Name: Reference Level Headroom

Property of RFmxDemod

Specifies the margin RFmx adds to the Reference Level property. The margin avoids clipping and overflow warnings if the input signal exceeds the configured reference level.

RFmx configures the input gain to avoid clipping and associated overflow warnings provided 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 previously included the margin in the Reference Level, you could improve the signal-to-noise ratio by reducing the Reference Level Headroom.

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.

Supported devices: PXIe-5668R, PXIe-5830/5831/5840/5841.

Default values

PXIe-5668 6 dB
PXIe-5830/5831/5841 1 dB
PXIe-5840 0 dB


The following table lists the characteristics of this property.

Datatype /images/reference/en-XX/help/374641M-01/cdbl.gif
High-level VIs N/A


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