6527/6509 Sample Timing

[JVL]

I just wanted to confirm how timing works on the 6509 and 6527 DIO cards. Based on what I have seen, the only timing supported is software timing. Is this true? What does software timing mean? Is it my application code timing (Visual C++) or is it software timing within the DAQmx library that can be set up via the API?

Thanks,

John

[Graziano]

HI!
   NI 6509 board does not allow to set HW timing, I discovered this in the forum.... 

   The timing you set in DAQmxSetTimingAttribute(), for example, is, in general, the actual sampling rate, i.e. the timing characteristics of sampling clock (HW).  This can be done for other devices than your NI 6509.....

   If you open DAQmxSetTimingAttribute() function panel, and you left-click in "attribute" menu, you open a window, in which you can select (at the top) Device: All configured devices or All devices.  If you set this to All configured device you'll get the list of available attributes you can set for your board.

   I don't know how does this property works when you've 2 configured devices, just try.....

   let me know if this helps, and have a nice day!

graziano

[Hal_L]

Hi,

I would also like to point out that a description of the difference between software timing and hardware timing is available in the NI-DAQmx Help. Go to Start >> All Programs >> National Instruments >> NI-DAQ >> NI-DAQmx Help.  Once the help is open, go to NI-DAQmx Key Concepts >> Timing and Triggering >> Timing.

Regards,
Hal L.