Acquisition:Fetch:Data Transfer:Data Transfer Block Size Property

Acquisition:Fetch:Data Transfer:Data Transfer Block Size Property

Short Name: Data Transfer Block Size

Property of niRFSA

Specifies the maximum number of samples to transfer at one time from the device to host memory. Increasing this number should result in better fetching performance because the driver does not need to restart the transfers as often. However, increasing this number may also increase the amount of page-locked memory required from the system.

Default Values:

PXIe-5668—0x2,000,000

All Other Devices—0x400,000

Supported Devices: PXI-5661, PXIe-5663/5663E/5665/5667/5668

Remarks

The following table lists the characteristics of this property.

Datatype
Permissions	Read/Write
High-level VIs	N/A
Channel-based	No
Resettable	Yes