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External trigger for PCI-6602 and quadrature endocer Encoder Data Acquisition

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Hello,

 

I am new to using PCI 6602 board with quadrature encoders and would much appreciate some help.  

 

I have 2 quadrature encoders at a fairly low rate (~250Hz) that should be triggered with an external TTL signal.  I am also trying to record the trigger channel to verify the synchronization in post processing. I started with a Labview example code but the vi just executes without waiting for the trigger.

 

Would anyone have insight to this problem?


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