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NI-5122 Multiple records: different trigger for first record

Hi,

 

I’m using a NI-5122 high-speed digitizer to acquire multiple records (say 100 of length 20 each), triggered by an external 1kHz source, and clocked by an external 80MHz clock.

 

Is it possible to start the whole acquisition process (i.e. the first record) with a certain trigger signal (e.g. from PFI0), but trigger subsequent records with a different trigger signal (e.g. from TRIG)?

 

Thanks in advance for your suggestions!

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TobiSL,

Yes, what your asking for is possible, and the two trigger types you mentioned are called repectively: Start Trigger, and Reference Trigger.  You can configure each of these triggers separately.  To configure the Reference trigger you use the "niScope Configure Trigger vi".  To configure the start trigger, all you need to do is specify the source of the start trigger, using the niScope property node: "Start Trigger Source".  

 

Hope this helps!

Systems Engineer
SISU
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Hi Nathan,

 

thanks a lot for your hint! I quickly implemented it, and it seems to work.

 

Tobias

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Perfect, glad I could help!

 

-Nathan

Systems Engineer
SISU
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In case you're wondering, the documentation for these two triggers (as well as other signals) can be found here:

SMC-Based Digitizers Acquisition Engine State Diagram

 

National Instruments
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