Using 6537, data acquisation, how to configure it for external clock and strobe

[BPW]

Can anyone tell how to configure the 6537 PCIe card for data acquisition, such that it uses an  external clock and Strobe to clock the data in.  IE clock and strobe Hi - indicates valid data, therefore store the data

[Ryan_M]

BPW,

In LabVIEW, if you goto HELP>>FIND EXAMPLES an example finder application will pop up.  In this window, you can browse for HARDWARE INPUT AND OUTPUT >> DAQmx >> DIGITAL GENERATION  for examples using an external clock for generation sessions or HARDWARE INPUT AND OUTPUT >> DAQmx >> DIGITAL MEASUREMENTS for examples of using an external clock for acquisition (strobe).  Look for the examples that have "Ext Clk" in the title.

hope that helps

[BPW]

Thats for the pointer, I had previoulsy found similar code ( I am using Borland), but none of the examples used both an external clock and strobe to validate the data, I am expecting some code from the NI help desk which will indicate the way to go.  It may have something to do with setting up a pre trigger....

cheers

[jcarbonell]

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@BPW wrote:

Can anyone tell how to configure the 6537 PCIe card for data acquisition, such that it uses an  external clock and Strobe to clock the data in.  IE clock and strobe Hi - indicates valid data, therefore store the data

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Hi BPW,

It sounds like you want to use an externally clocked acquisition with a data valid signal to gate the data.  In DAQmx, the data valid signal is called the pause trigger.  So you want probably want to use one of the pipelined sample clock examples w/ a pause trigger.

Good luck,

Jeff