USB-6008 NiDaqMxBase analog output issue

[Vadim_I]

Hello!

My setup:

NI USB-6008

NiDaqMxBase

Linux OpenSUSE 11.0 on netbook Toshiba NB200

Analog input and digital output work fine.

But when I compile and run analog output tasks samples/ao/contGeneration.c and contGenVoltNonRegen.c the following error is returned:

DAQmxBase Error: <err>Specified property is not supported by the device or is not applicable to the task.

Sample program samples/ao/genVoltage.c works fine.

Could anybody help me with that, please?

Vadim.

[Vadim_I]

Just one notice. When Iplayed with genVoltage.c (set voltage and quit), I found that it generates differential voltage on terminals AO0 and AO1.

[Vadim_I]

After reading USB-6008 documentation I realized, that it does not support signal generation, just level.

I still can not understand how to configure AO for non-differential output.

[EEsRULEtheWORLD]

Hi, Vadim.

The analog output is referenced to ground for the USB-6008.  Check out the Analog Output Circuitry on page 19 of the USB-6008 Specifications manual.  There is no need to configure for non-differential mode.

You are correct in that the USB-6008 does not support continuous analog generation.  This is a limitation of the DAC associated with the analog output circuitry; the DAC will only accept software-timed updates of up to 150 Samples/sec.  For more information regarding this limitation, refer to the USB-6008/6009 Continuous Analog Output Knowledgebase.

Let me know if you need any more information.  I hope you're having a great day!