SOS ... Need help with Data Queue PtByPt

[rueter]

I am trying to perform psuedo real time processing of signal and to reduce buffering, I am using Data Queue ptBypt VI that stores a select number of samples and analyse them. My requirement is very straight forward -the waveform I am trying to analyze involves a stimuls pulse (A rectangular shaped one) followed by a response signal (which is generated by the stimulus after a short duration). I need to find the TIME INSTANT VALUE( X-AXIS) when an event occurs; event means the time instant the response shows up/ends on the waveform and the time instant the stimulus show up/ends. The sample whose value goes above a certain threshold can be deemed a peak, but how do I detect the x-axis value corresponding to this?

Please help...
t
hanks
rueter.

[Evan]

I am not sure I understand the question, so if I am way off sorry.

Can you provide a simple VI that shows how you are saving the waveform in the Queue? I imagine that what you will have to do is just keep track of how many data points you have placed in the queue, so that when you are doing the processing, you will know how many points have been inserted, so you find the peak you have the "index" of the point and then you just multiple it by your dt.

Like I said I am not sure though, so attach some code and give us an idea of what you are looking for and we should be able to help.