Arb:Data Transfer:Direct Download Property

NI RF Signal Generators Help (NI-RFSG 18.1)

Edition Date: June 2018
Part Number: 371025V-01
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Short Name: Direct Download

Property of niRFSG

Specifies whether the niRFSG Write Arb Waveform VI immediately writes waveforms to the device or copies the waveform to host memory for later download. NI-RFSG reads and validates this property when an arbitrary waveform is first allocated.

PXI-5670: Direct download is always disabled.

PXI-5671: To increase performance when using large waveforms, enable direct download. To maximize reconfigurability, disable direct download.

Perform the following steps to enable direct download:

  1. Set the I/Q rate to less than or equal to 8.33 MS/s with the IQ Rate property.
  2. Set the Power Level Type property to Peak Power.
  3. Disable the IQ Swap Enabled property.
  4. Disable the Digital Equalization Enabled property.

PXIe-5644/5645/5646, PXIe-5672/5673/5673E, PXIe-5820/5840: Direct download is always enabled.

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

Disable (0)

Disables direct download.

Enable (1)

Enables direct download.


The following table lists the characteristics of this property.

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


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