Hello lai,
if you have installed DAQmx API or Traditional-DAQ API a variety of examples ship with the driver installation. They can be accessed the easiest way through the example browser of CVI. Go to Help >> Find examples and Navigate to: Hardware Input and Output >> DAQmx >> Generating Digital Pulses. Here you will find DigPulseTrain-Cont.prj, which demonstrates, how the device can be configured for continuous pulse train generation (defining frequency, duty cycle, etc.) and could serve as a good point to start from.
If you have any queueries, do not hesitate to contact us again.
Regards,
C.L. - National Instruments Germany GmbH
