Hi All, I am relatively new to Labview and wish to synchronise my data aquisition with a high speed camera. I apologise in advance if this question has been asked before, but I could not find any threads that could help me. The equipment I am using is a NI cDAQ 9172 Chassis with an NI 9215 and NI cRIO-9233 modules, and Labview 2010. I have an application where I use several devices as inputs to my NI system. Included in that system is the output of a high speed camera, which produces a voltage pulse for every frame taken. I wish my labview program to sample the data from all the instruments using the camera as an external clock. More specifically, I will have my camera set at 4000 fps, and I wish to sample at approximately 40,000 Hz, so that 1 in every 10 data points will be acquired at the same moment the pulse occurs (and thus when the camera takes an image). I have combined two programs from the NI Examples explorer. The first is a TDMS streaming example to continuously log data. The second is a program to continuously acquire and graph voltage, with an external clock (Cont Acq&Graph Voltage-Ext Clk). I have attached an image of my block diagram. I have set the clock source in this program to "Sample Clock" under the Module I am using, and have collected data. However I do not know if the data is being acquired at exactly when the pulse is being fired. I was wondering about the following: 1. Will/can this program (Ext Clk example mentioned earlier) acquire the data at the correct moment using the camera as a clock? If not, how can I get this to work? 2. Under the Clock Source setting, I can specify the module I am inputting for my clock, but not the exact channel. How does it know which channel I want to use as my clock?3. Why do I get errors when I try to use the NI 9215 module, but not when I use the NI cRIO-9233 module? 4. Are there any hardware/software considerations I should be aware of for the timing of the data acquisition? Thanks in advance for all your help. Please let me know if I was not clear in anything.

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Hi Luis,

My questions have been answered at this time. Thank you very much for your help.

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