Hi Fios,
You haven't given enough information for us to help you. We need to know what Hardware you want the pulse to be outputted on, or if you even want a hardware pulse, maybe you only want a pulse in software and display it to a graph.
You also have not given us pulse specs, how long do you want the pulse to be high for, and how long do you want it to be low.
If you answer these questions, you are more likely to get an answer.
Regards
JamesC
NIUK and Ireland