----- Repost from the LabView forum where this thread does not belong----- Hi I capture two waveforms (external excitations) with my PXI446, one on each AI. I use one of them as an analog trigger (rising edge @ some voltage), lets say AI0. I need the value of AI1 at the time (or fixed # of dt's afterwards) when the trigger occurs. I need just that one sample. (Practically I use the 4461 as sample & hold circuit that has AI1 as an input signal and AI0 as the "sample" signal.) Currently, I use a "subset and resample" step with a very small dt and it seems that it works but I dont like it. The procedure above is within a conditional loop that collects 100 of these samples (acquire signal triggers 100 times) and produces a statistic of this ensemble (using the Statistics step). Is there a better way to do this? Thanks, Aleksandar Andreski

Hi Peter,Thanks for your answer.I am also thinking the same: better do this in LV rather than SE-LV. I tried the "subset and resample" function before but as you say it cant be made to select only one sample. Moreover, the overhead in SE is greater than in LV and so it slows down the other parts of the measurement that I would like to do (ex. a conditional loop).I will probably make an LV task.BTW, if I use LabView Realtime, can it execute said loops faster?Greetings,Aleksandar

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Capturing only one sample after analog trigger on a PXI4461 in Labview SignalExpress

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Thanks Peter. I will tag this thread as "solved" now.

Greetings
Aleksandar

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Capturing only one sample after analog trigger on a PXI4461 in Labview SignalExpress

Re: Capturing only one sample after analog trigger on a PXI4461 in Labview SignalExpress