Starting time of the data acqusition of the digitizer

[alex.]

I may need to know the exactly starting time of the data acquisition of the digitizer.

The data acqusition is triggerred by outside signal. 

I just wonder if the digitizer is possible to send a signal to PC when it start data collection. So when PC receive the signal, it can check the system time.

Any suggestion, thanks.

[KateB]

You don't need to send any signal to PC.
Just use 'Get Waveform Components', and read out t0 to see timestamp of acuisition begin time.

[alex.]

May I know how accurate the time t0 will be, milli second or micro second.

How does the DAQ card synchronizde time with the PC, thanks.

[Dennis_Knutson]

The card does not synchronize time with the pc. Look here for an explanation of how the timestamp is obtained.