why does this freq. meas. vi frequently output zero?

[Jeff in Pleasanton]

I've searched the forums and learned that the 1-counter-low-frequency vi from the digital frequency measurement library fits my needs (roughly 2500 Hz to 25000 Hz signal freq range, DAQpad-6016 device).  I thought all I needed to add to the example code was a while loop with a delay, and a gauge.

But the vi outputs zero fairly often, and I don't see why.  I don't think the input signal is dropping out, so it must be another one of those noobie mistakes I keep making! 

I've attached my vi.  Thanks for any insight!

Jeff

[NIquist]

Your code looked good so I connected a TTL frequency generator and tried it out.  No problems or drop-outs here.  I played with varying frequencies for a few minutes, it worked just fine. 

[Jeff in Pleasanton]

Thanks for the feedback!  I'll focus on investigating the signal rather than debugging a vi that works fine.

Jeff