Pulse Measurement VI problem

[Dave Crabbe]

In using the Pulse Measurement (built-in) VI more I see it cannot
measure pulse periods when the frequency is below about 15 hz .. at
least on my system. I am simply bringing in a simulated sine waveform
and leaving all the defaults on the pulse measurement VI.. is there a
way to extend the range of the pulse measurement vi for slower
waveforms? (I'm guessing the VI somehow times out?)