Programming instructions

Chapter 17 NI 5411 Devices

DAQ Hardware Overview Guide 17-6 www.ni.com

NI 5411 Device Feature Settings

You can change the following feature settings even when the waveform

generation is in process:

• Duty cycle of the SYNC output.

• Output (relay) to ON or OFF.

• Output Impedance to 50 or 75 Ω.

• Switching the analog filter ON or OFF.

• Switching the digital filter ON or OFF.

Note

Refer to the AO_Change_Parameter function description in the NI-DAQ Function

Reference Online Help for more information on setting these features.

You can change the method used to transfer data using

Set_DAQ_Device_Info. Possible values are:

• DMA—data transfers done via DMA (PCI-5411 only).

• Foreground—data transfers done via the CPU.

• Automatic—selects most appropriate transfer method.

Transfers done via DMA require memory to be page locked. If a computer

is having a hard time locking the memory it needs to do a data transfer,

switch the data transfer method to Foreground.

Note

Refer to the Set_DAQ_Device_Info function description in the NI-DAQ Function

Reference Online Help for more information on setting this feature.