On 5 Jun 2000 09:38:46 -0500, "J. Wolters"
wrote:
Thank you for the response but I'm not sure what the DAQ_Rate function
is. With LabVIEW 5.1 it does not appear in the DAQ pallette and I
cannot find it in the example vi's. Do you know where it can be
found?
>
>Have you looked that DAQ_Rate function? You should be able to use this function
>to obtain your # of samples.
>
>
>gcouch wrote:
>>I can't seem to find an implementation example for this application.>Some
>are close but seem to have a big gap on close examination.>>The application
>is to log an unknown number of samples for a >single rotation of a variable
>speed drum. The drum is connected>to a tachometer which generates 1 pulse
>per revolution and i
s the>trigger source.>>The user will initiate the data
>collection and only a single>rotation's>worth of data need be collected and
>displayed.>>The board is a PCI 6111E sampling a single input at ~2 Megahz.
> >>All the examples I've found using a start and stop trigger depend>on knowing
>how many scans to acquire.>>Is there any way to get around that? It seems
>so simple to>have a start and stop pulse, a scan rate constant, and just
>get>the data out of a buffer. But it does not seem to be that simple>or
>am I missing something here?>>There is also an issue with the identical tach
>signal being used>for both the start and stop trigger. I think that can
>be gotten>around by using a divide by n counter and feeding that to>trigger
>config vi but if anyone has any suggestions for that,>they would be greatly
>appreciated.>>Gene Couch>>