Delayed data acquisition after starting generation

[whiteeve77]

Hi everybody,

I have a question about the delayed data acquisition after generating the input signal.

Currently I synchronize the arbitrary waveform generator (PXI-5421) and the digitizer (PXI-5122). So I can measure the input signal and the output signal simultaneously. The attached is my current VI for this data generation and acquisition.

Now, I want to measure the output signal from PXI-5122 1ms after generating the input signal from PXI-5421.

If you know some solutions for this problem, please let me know.

Thanks in advance,

Sang Jun

[Raajit_Lall]

Hello Sang,

You can use a trigger delay to acquire post trigger samples after a specific delay.  Trigger delay is the amount of time that elapses between when a trigger occurs and when the digitizer actually triggers.  Trigger Delay, which is specified in seconds, is achieved by adding the appropriate number of posttrigger samples to the record while keeping the allocated onboard memory equal to the record size you request. NI-SCOPE then corrects the trigger time by the delay you specify.



This is just an input parameter on the NIScope Configure Trigger.vi. 

Hope this answers your question.

Message Edited by Raajit L on 03-26-2007 06:38 PM