The analog signal is from a photodiode exposed to light periodically through a chopper. I want to extract the signal when light is blocked and when unblocked. The VIs available in labview will do the job I am sure. But I am unable to select the right set of tools. This is what I am trying as a first step :
Create channel-DAQmx Start - While loop (DAQmx read 32768 samples- pulse measurement- Extract portion of signal(length = period/2)).
Bcoz of specifying 32768 samples per iteration, the 'Extract portion of signal' cannot give the portion corresponing to unblocked/blocked signal.
If u sepecify -1 instead of some big value like 32768, 'pulse measurement vi' won't function. What should I do? Please help...
