RF Attenuation:Value (dB) Property
- Updated2024-04-10
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RF Attenuation:Value (dB) Property
Short Name: RF Attenuation (dB)
Property of RFmxInstr
Specifies the nominal attenuation setting for all attenuators before the first mixer in the RF signal chain. This value is expressed in dB.
The RFmx driver uses the value of this property as the attenuation setting when you set the RF Attenuation Auto property to False.
| PXIe-5663/5663E | You can change the attenuation value to modify the amount of noise and distortion. Higher attenuation levels increase the noise level but decreases distortion; lower attenuation levels decrease the noise level but increases distortion. |
| PXIe-5603/5605/5665/5668 | Refer to the PXIe-5665 or the PXIe-5668 RF Attenuation and Signal Levels topic in the NI RF Vector Signal Analyzers Help for more information about configuring attenuation. |
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 valid values for this property depend on the device configuration.
Supported devices: PXIe-5663/5663E/5603/5605/5665/5668
Remarks
The following table lists the characteristics of this property.
| Datatype |  |
| Permissions | Read/Write |
| High-level VIs | RFmxInstr Configure RF Attenuation |
| Resettable | Yes |