Start Trigger Synchronization with USB-6002

[Omnistic]

Hi all,

I'm trying to implement the Start Trigger Synchronization (Fig. 2) from this article: https://www.ni.com/en/support/documentation/supplemental/21/signal-based-synchronization-of-analog-i... using two analog input channels of USB-6002 and I am getting an error 50103. From what I read, it could be that USB-6002 isn't capable of handling concurrent tasks but when I look at the specs of USB-6002 I cannot find this information. This is my VI:

I made sure to split the total 50kS/s into two (as the 50kS/s is specified as aggregated in the specs of USB-6002). Can anyone help me figure out my mistake here? Thank you very much for your help and take care,

David

[Kevin_Price · Accepted solution]

Put both channels into a single task by specifying "Dev1/ai0:1".  This is a typical restriction across any DAQmx devices I can think of - only 1 AI "timing engine" available per device, so when you need to sample multiple channels, put them all in 1 task.

-Kevin P

[ZYOng]

To supplement what Kevin has shared, see

Number of Parallel DAQmx Tasks on NI Multifunction Devices

Easily Synchronize and Trigger NI-DAQmx with Channel Expansion

[Omnistic]

Thank you both, very helpful once again. For those interested, this is my corrected VI:

Take care,

David