Sampling rate failure

[jhirschbuehler]

Hallo,

I am using Diadem 9.1, USB-6009 analog input device with the DaqMx 4.0. If I try to apply sampling rates higher than 500 Hz the measuring time doubles:

For example, I adjusted 10000 samples with 1000 Hz. The measuring time took about 20 s (analog stop watch) Diadem tells me it is 10 s and the reached sampling rate is 1000 Hz.

If I try the same recording with the Automation Explorer, there are no troubles.

I asume it is because of the  "Windows timing" I had to choose. Other timing is not accepted. Is there a method to improve this?

Best regards

Juergen

[Wolfgang_Z.]

Hello Jurgen,

Which timing do you use? Software Timing or Hardware Timing?
You should use Software Timing for sample rates near 1000 Hz or higher.

Best regards,
WolfgangZ

[jhirschbuehler]

Hallo,

I only could find a field in Diadem to change between "best timing" , "soft timing" and "Windows timing". But the only way my  DAC works is the "Windows timing". Even in the Daqmx I couldn't find any timing adjustings for the virtual channels. 

Thank you for the support

Jürgen

[Wolfgang_Z.]

Hallo,

Attached you can find a screenshot of the "Systemtakt" window.
There you can choose Hardware Takt.

Thanks and regards,
WolfgangZ

[jhirschbuehler]

Hallo,

after adding a "Takt-Block" to my DAC the recording works fine. ( I wanted to spare "Blocks" first).

Thank you for the good support.

Jürgen