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HSDIO 6556: How to measure the time period between 2 accepted strobe triggers ?

Hi,

 

I am using HSDIO6556, configured as: "niHSDIOProperties.DigitalEdgeStartTriggerEdge RisingEdge" & "ConfigureSampleClock: Strobestr 1000000" . I am expecting trigger signals to the STROBE pin at 1000000 Samples/second. My questions are:

 

Q1) Does it matter what value i program to the "Strobestr" ? I suppose, it requires to be more than my expected trigger rate.

 

Q2) Is there any means of measuring the time interval between accepted STROBE signals ??

 

Thanks,

Antony

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Hi Antony,

 

You want to try and get as close as you can to the expected input clock rate so that the board knows how to configure it's internall PLL to synchronize itself to your external sample clock signal. As long as it stays within the specified stability of STROBE which is found on page 30 of the specs, you should be fine.

Kyle A.
National Instruments
Senior Applications Engineer
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