Youngkey,
You can synchronize the two data acquisition boards, by using the RTSI bus that is part of the architecture of the boards. I am attaching the text of a Knowledge Base which describes how to accomplish this goal:
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Title:
Synchronizing data acquisition between two or more MIO-16 series boards
Problem:
How can I synchronize data acquisition between two or more MIO-16 series boards?
Solution:
First, place a special Real-Time System Integration (RTSI) cable on the RTSI connector. Then, determine what trigger pulse signals need to transmitted to the trigger inputs of each MIO-16 series board. The board which sends the trigger signal becomes a 'master' and the board that rec
eives becomes a 'slave'. Finally, start the data acquisition on both boards. Make sure you call the data acquisition functions or VIs on the slave board first to arm the acquisition. Below is a list of necessary function calls.
* In NI-DAQ or LabWindows: Call the function RTSI_Conn for each counter or trigger signal you wish to connect up to a RTSI Trigger Line. Then call the regular functions to perform a data acquisition on both boards. Call the function RTSI_Clear at the end of the program.
* In LabVIEW: Call the RTSI Control VI with control code set to Connect for each counter or trigger signal you wish to connect up to a RTSI Trigger Line. Then call the regular VIs to perform a data acquisition on both boards. Call the RTSI Control VI with Control Code set to Clear at the end of the program.
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Hope this information is helpful.
L Aguila
Applications Engineer
National Instruments
