Why do I have to specify a rate when using an external Sample Clock?

Set the approximate Rate of the external clock. This allows the internal characteristics of the acquisition to be as efficient as possible.
How to understand?
帖子被sillyball在02-25-2007 01:48 AM时编辑过了

I think it is for optimization of the buffer.
Ton
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/mola
Solved!
Go to Solution.

Hi mola,
That specific example is for sample-clocked pulse width measurements. This type of measurement is only supported on newer hardware such as X Series boards and will not run on the 6602.
Your application that you linked uses Implicit timing, meaning that the signal itself serves as the sample clock. That is, at the end of each pulse width that you measure, the sample is deterministically latched in. So, you end up with a buffered array of every pulse width that is seen by the counter.
Best Regards,
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