trouble with timing

[glskinner]

I'm having a bit of trouble with my timing. I'm measuring a digital signal and once it goes from low to high, I want to start measuring data. The trouble is, I'm getting 0s before my data starts to increase. (see attached .txt) The data I'm recording is a CMD signal from an MTS controller (for troubleshooting purposes). If I'm telling the data to collect once the sync out reaches high, why am I getting these zeros initially? I'm using a MCC 1608FS as my Daq.

[glskinner]

No one has any input? This is really stumping me.

[Matt_L]

Hi,

I'm not quite sure what you mean by the zeros in the text file, all the values I saw were nonzero.  Did you mean the empty first column before the first comma?  I think that is due to the time column being empty, so if you re-enabled this you would see a value there.  

Does the data also appear wrong on the waveform chart?  You do have a coercion dot on the Write to Measurement File VI, so it might be worth reading that waveform into strings and see where the zeros appear.