get time stamp from waveform data

[Wolleee]

Hello all,

i am trying to pull out the time stamp from the waveform data if this is possible. I am trying to write it to file, but the express vi doesnt allow for fractional seconds and when i write the waveform data to a string for use with write to spreadsheet, the time data is lost. 

any suggestions?

[Dennis_Knutson · Accepted solution]

Use the Get Waveform Components. What express VI? The Write to Measurement File does write fractional seconds.

[Wolleee]

Thank you Dennis, I figured it out like right after i posted.  Another question though.  So im using a producer consumer loop and gathering data at 1000 samples per channel.  Im trying to write this data to a file with a time stamp, but in the consumer loop when i get the time stamp from the waveform and rebuild the array, i only get one time stamp per 1000 samples.

Any ideas how to fix this?  I can post code if necessary.

[billko]

Make sure you are using a double to express fractional values.  An INT would return values like what you are seeing.

[Dennis_Knutson]

There is only a single timestamp in a waveform t0. There is also dt. You can calculate a timestamp for each element if that is what you are asking.

[Dennis_Knutson]

There is only a single timestamp in a waveform t0. There is also dt. You can calculate a timestamp for each element if that is what you are asking.

[Wolleee]

That sounds like what i am looking for. 

Thank you Dennis.