storing by trigger with pre time and post time

[Balaji_DP]

 hi,

I am acquiring sample rate of 1000 samples/sec. i am using digital inputs for storing start and stop. when the digital input is high it should start storing and accordingly user has to specify the number of samples or time and data appended before storing starting. i.i pre time or pre samples has to be added before start storing the data. also for stop storing the data post time or samples has to be added.

how to do this..? can i have a sample vi?

[Rajmohan]

may be its helpful to you,By using value signaling we can generate the event whenever true occur in Digital input channel (daq),in that particula event case we can append the old data from file like tdms etcc.