Vertical:Advanced:RF Attenuation (dB) Property

Vertical:Advanced:RF Attenuation (dB) Property

Short Name: RF Attenuation

Property of niRFSA

Specifies the nominal attenuation setting, in decibels, for all attenuators before the first mixer in the RF signal chain. If you do not set this property, NI-RFSA automatically chooses an attenuation setting based on the reference level you configure. The valid values for this property depend on the device configuration.

PXI-5600/5661—You can change the attenuation value to modify the amount of noise and distortion. Higher attenuation levels increase the noise level while decreasing distortion; lower attenuation levels decrease the noise level while increasing distortion.

PXIe-5601/5663/5663E—You can change the attenuation value and the value of the IF Attenuation property to modify the amount of noise and distortion. Higher attenuation levels increase the noise level while decreasing distortion; lower attenuation levels decrease the noise level while increasing distortion.

PXIe-5603/5605/5665/5668—You can set multiple properties to modify the attenuation values for the device. Refer to PXIe-5665 RF Attenuation and Signal Levels or PXIe-5668 RF Attenuation and Signal Levels for more information about configuring attenuation.

PXIe-5667—This property specifies the nominal attenuation setting for all attenuators before the first RF mixer in the input signal path. This property is read-only when the Low Frequency Bypass Enabled property is set to Disabled.

PXIe-5693—This property is read-only and returns the nominal RF attenuation of the PXIe-5693.

Default Value: N/A

Supported Devices: PXI-5600, PXIe-5601/5603/5605/5606 (external digitizer mode), PXI-5661, PXIe-5663/5663E/5665/5667/5668, PXIe-5693

Remarks

The following table lists the characteristics of this property.

Datatype
Permissions	Read/Write
High-level VIs	N/A
Channel-based	No
Resettable	Yes