"Error -200077 occurred at DAQ assistant" problem for NI USB-6009 DAQ

[abdallah]

Hello

I have this problem with generating signals using the DAQ, and I appreciate any help in solving it

I just got this NI USB-6009 DAQ card; I was trying to generate an output signal

Whenever I try to use NI LabView or LabView Signal Express to generate an output analog signal, I get an error in the DAQ Assistant screen, following is the error:

"

DAQ Assistant Error

Details:

Error -200077 occurred at DAQ Assistant

Possible Reasons:

Measurement Requested value is not a supported value for this property.

Property: SampTimingType

You Have Requested: Sample Clock

You Can Select: On Demand

"

I just chose the following options in the DAQ Assistant screen:

Channel Settings: VoltageOut

Timing settings: N samples (or Continuous Samples)

Test Signal Type: Sine Wave

Physical Channel: AO1

I tried to check the Measurement and Automation Explorer, in the Test Panels screen, Analog Output Tab... I found that the Rate, Transfer Mechanism, Frequency, and Stop options are disabled.

In the self-test (from MAX), the device passed the self-test

I use Windows Vista

I attached some print screens

So, how to fix this problem? I need to use this USB card as a function generator, so I need to be able to generate signals using this card!

any help...

Thanks alot

Abdallah

[Dennis_Knutson]

You get an error when trying to specify sample timing because sample timing is not supported with that DAQ device. As the error message states, you only have on-demand output. This is software timed output - a single point at a time. As the manual/specs state, the best output rate you can achieve is a couple of hundred hz and this is going to be subject to quite a lot of variation and jitter because of the uncertainies of any software timed operation. If you need higher frequencies and better resolution, you need to use a different device.