Arb:Signal Bandwidth (Hz) Property

NI RF Signal Generators Help (NI-RFSG 18.1)

Edition Date: June 2018
Part Number: 371025V-01
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Short Name: Signal Bandwidth (Hz)

Property of niRFSG

Specifies the bandwidth of the arbitrary signal. This value must be less than or equal to (0.8 × I/Q rate).

NI-RFSG defines signal bandwidth as twice the maximum I/Q signal deviation from 0 Hz. Usually, the baseband signal center frequency is 0 Hz. In such cases, the bandwidth is simply the I/Q signal's minimum frequency subtracted from its maximum frequency or fmax - fmin.

This property applies only when the Generation Mode property is set to Arb Waveform or Script, except for when using the PXIe-5840, which supports setting this property in all supported generation modes. To set the Signal Bandwidth property, the NI-RFSG device must be in the Configuration state.

PXI-5670/5671, PXIe-5672: Based on your signal bandwidth, NI-RFSG decides whether to configure the upconverter center frequency in increments of 1 MHz or 5 MHz. Failure to configure this property may result in the signal being placed outside the upconverter passband.

PXIe-5644/5645/5646, PXIe-5673/5673E: This property is used only for error checking purposes. Otherwise, this property is ignored.

PXIe-5820/5840: Based on your signal bandwidth, NI-RFSG decides the equalized bandwidth. If this property is not set, NI-RFSG uses the maximum available signal bandwidth. For the PXIe-5840, the maximum allowed signal bandwidth depends on the upconverter center frequency. Refer to the specifications document for your device for more information about signal bandwidth. The device specifications depend on the signal bandwidth.

Supported Devices: PXI-5610, PXIe-5611, PXIe-5644/5645/5646, PXI-5670/5671, PXIe-5672/5673/5673E, PXIe-5820/5840

Related Topics

Phase-Locked Loop Bandwidth

Frequency Tuning Times


The following table lists the characteristics of this property.

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


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