Arbitrary Waveform:Data Transfer:Advanced:Preferred Packet Size Property

NI Signal Generators Help (NI-FGEN 18.1)

Edition Date: April 2018

Part Number: 370524V-01

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Short Name: Preferred Packet Size

Property of niFgen

Specifies the preferred size of the data field in a PCI Express read request packet.

In general, the larger the packet size, the more efficiently the device uses the bus. By default, NI signal generators use the largest packet size allowed by the system. However, due to different system implementations, some systems may perform better with smaller packet sizes.

Recommended values for this property are powers of two between 64 and 512.

Note  In some cases, the signal generator generates packets smaller than the preferred size you set with this property.
Note  You cannot change this property while the device is generating a waveform. If you want to change the device configuration, call the niFgen Abort Generation VI or wait for the generation to complete.

Remarks

The following table lists the characteristics of this property.

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

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