Hi,
I am building a Scanning tunneling Microscope STM which requires a 250 by 250 pixel scan with a delay of about 1ms between pixels. I want to start the scan with a software trigger. The scan entails outputting an x and y value using two AO channels , wait about 1ms then read a tunnel current analog input value at that position, store it in an array and repeat till done. The array will then be plotted using an intensity graph.
As an option, I would like to plot a single line of the scan as it is completed to allow operator monitoring as the scan is produced. I have programmed this in sw using nested while loops but the overhead is too great for 1ms pixel sample times.
I have found a close solution in forum under the AI delay following an AO that used a hardware trigger to start process : See" AODelayAI.vi"
I have a PCI MIO 16E-4 DAQ board and am using LABVIEW 6.
PS: Is there any discrete that is generated by an AO which can be used to trigger an AI or a counter?