Consider the case where you have a cDAQ II chassis filled with analog input modules. If I have several modules that are running at the same rate I can use channel expansion to include them in the same task. Since they're in the same task they will have the same timing and triggering and will share the same timing engine. This leaves the other two timing engines available for tasks with different timing constraints. If I want to dynamically change the sampling rate of just one of the modules I would have to stop the task and, hence, the acquisition on the other modules. If the same timing engine could be shared among tasks, each module could have its own task and be independently controlled. I imagine this would involve a lot of changes to the DAQmx task structure but it's something that would come in handy.
Sean Ferguson
Application Engineering Specialist | RF and Reconfigurable Test
