Build pulse train using analog input as trigger

[mariah]

Hi all,

I would like to build a diagram to generate a pulse train with a pulse width controlled by external triggers.

I have 2 analog inputs (FLAG1 and FLAG2) which I want to use to start pulse and stop pulse respectivelly.

I want to generate a digital pulse train using these external signals as triggers, in this way:

Could anybody help me on it?

I just have the trigger signals (FLAG 1 and FLAG 2) in a virtual channels (Dev1/ai0 and Dev1/ai2 on PCI-6036E). How can I generate the resulting pulse train?

Thanks in advance.

Maria

[Broken_Arrow]

You can build a signal like that using Basic Functioin Generator.vi

It looks like all you need is a square wave with a different duty cycles, which that VI can do.

[mariah]

Thanks for your reply.

I think this module can be used in the block diagram, but I need to trigger the pulse (start and stop) with analog inputs (Dev1/ai0 and Dev1/ai2 from PCI-6036E), this is my main problem.

[Romain_Duval]

I agree with Broken Arrow.

The main problem is the hardware you wanna use the 6036E. Otherwise, the change detection polymorphism of the timing DAQmx VI would have been a good alternative if I don't misunderstand:

[mariah]

Hi Romain,

thanks for your help. I finally got this behaviour with this block diagram:

Regards,

Maria