How to generate mixed trigger signal

[hgl86]

Hello, how to generate a trigger signal with two different width pulses like this, by using a daq card? Thank you!

[ZYOng]

You can use digital waveforms. 

What is the desired pulse width for both big and small pulses?

What is the model of the DAQ device you have? Most multifunctional DAQs only support digital waveform timing of up to 1MHz. 

[Kevin_Price]

If your device supports it, you could also generate a buffered pulse train with a counter task, which would give you finer resolution for your time intervals.  X-series MIO devices and newer cDAQ chassis support this feature.   (But there are *more* devices that would support a digital waveform.)

-Kevin P