I have a USB-6501 that I am trying to use to capture and record a series of digital signals to see if one goes missing under load. The signal that I am interested in persists for about 500microseconds and happens every half second. I am trying to use the LV example code for digital input on this device, but it is not catching the signal reliably. I want to increase the sample rate, but when i add the DAQmx timing vi and try to set a rate for the sample clock, i get error -200077 at DAQmx Timing:
Requested value is not a supported value for this property. The property value may be invalid because it conflicts with another property.
Property: SampTimingType
Requested Value: Sample Clock
Possible Values: On Demand
I have read some other articles that explain that the timing module is not necessary for 'on demand' tasks. So then how can i increase the speed of the digital input sampling? I have also tried to configure the timing VI for edge trigger, but i get the same error. Is there any way for me to speed up the sampling rate of the digital input? I feel like im just missing something simple here... any help would be greatly appreciated.