Specifies whether the RF preamplifier is enabled in the system.

PXIe-5644/5645/5646, PXIe-5830/5831/5832/5840/5841/5842/5860: If you set this property to Automatic, RFmx selects the preamplifier state based on the value of the Reference Level property and the center frequency. For PXIe-5830/5831/5832, the value is not coerced.

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 for PXIe-5644/5645/5646 and PXIe-5830/5831/5832/5840/5841/5842 is Automatic, else the default value is Disabled.

Remarks

The following table lists the characteristics of this property.

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

Disables the RF preamplifier.

Supported Devices: PXIe-5663/5663E/5665/5668
Enabled 1

Enables the RF preamplifier when it is in the signal path and disables it when it is not in the signal path. Only devices with an RF preamplifier on the downconverter and an RF preselector support this option. Use the RF Preamp Present property to determine whether the downconverter has a preamplifier.

Supported Devices: PXIe-5663/5663E/5665/5668
Automatic 3

Automatically enables the RF preamplifier based on the value of the reference level.

Supported Devices: PXIe-5644/5645/5646, PXIe-5830/5831/5832/5840/5841/5842/5860