RF:Loop Bandwidth Property

NI RF Signal Generators Help (NI-RFSG 18.1)

Edition Date: June 2018
Part Number: 371025V-01
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Short Name: Loop Bandwidth

Property of niRFSG

Configures the loop bandwidth of the tuning PLLs. This property is ignored on the PXI-5610, PXI-5670/5671, and PXIe-5672 for signal bandwidths greater than or equal to 10 MHz. This property is ignored on the PXI/PXIe-5650/5651/5652 for RF frequencies less than 50 MHz.

Note  Setting this property to Wide on the PXIe-5644/5645/5646, PXI/PXIe-5650/5651/5652, or the PXIe-5673/5673E allows the frequency to settle significantly faster at the expense of increased phase noise. Setting this property to Medium is not a valid option on the PXI/PXIe-5650/5651/5652 or PXIe-5673/5673E. Medium is the only supported value for the PXIe-5840.

Supported Devices: PXI-5610, PXIe-5644/5645/5646, PXI/PXIe-5650/5651/5652, PXI-5670/5671, PXIe-5672/5673/5673E, PXIe-5840

Default Values:

PXIe-5644/5645/5646, PXIe-5840: Medium

PXI/PXIe-5650/5651/5652, PXIe-5673/5673E: Narrow

Related Topics

Phase-Locked Loop Bandwidth

Modulation Implementation

Sinusoidal Tone Versus Modulation Operation

Narrow (0)

Uses the narrowest loop bandwidth setting for the PLL.

Medium (1)

Uses the medium loop bandwidth setting for the PLL.

Wide (2)

Uses the widest loop bandwidth setting for the PLL.


The following table lists the characteristics of this property.

Datatype iL
High-level VIs N/A
Channel-based No


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