Lancer, I want to make sure I understand what you need. Your application requires the pulse width by the 10/90 criteria. Are you sure that means the time between when the rising edge hits 10% and the falling edge hits 90%? What do you mean by =93step backward?=94 It seems the duration itself is going to be fairly close to what you are describing, if not exactly the same.
If you are sure this is what you want, and you need it this precise, try the =93Pulse Measurements.vi.=94 Its help page defines the =93pulse duration is the time difference in seconds between the first two mid ref level crossings of the specified pulse number. pulse duration is also known as pulse width.=94 These mid ref level crossings can be user defined, so you could set them as 90% and 10%. This may be what you want. Hope this helps and have a great day! Robert M Applications Engineer National Instruments
