Hi dimitri
You only have one input counter in you board so you cant use your counter to generate pulses at a specific frequency.
The only solution that I see is to generate pulses , or transmit your digital data, with software timing and programmatically.
This timing process is not the best and depends on your computer
Let me know if you need something else
Erwin Franz
Certified LabVIEW Architect, Certified TestStand Developer