The NI PCI-5124 scope with 2 triggers

Hello

I would like to ask about the trigger for starting and reference with PCI-5124.

I found a sample VI on the following link, but it does not work as I expected.

http://zone.NI.com/DevZone/CDA/EPD/p/ID/2998

VI 'start_and_reference_trigger.vi' can detect the outbreak starting and reference in my system, and they begin data acquisition.

He starts data acquisition when both start and reference triggers are entered.

However, what I would do is:

1. sampling at 200 MHz with a 1500 with a single channel record length.

2. receive the signal to start (i.e. 50 Hz)

3 receive the reference signal (i.e. 50 kHz)

4. for each trigger reference, I would like to acquire the data, i.e. data of 1500 for each 100 trigger acquisition reference (not with the combination with the shutter release to start)

Start trigger: _|^|_________________________________________

Ref   trigger:______|__|__|__|__|__|__|__|__|__|__|__|__|__|__|____

^    ^    ^    ^   ^   ^   ^   ^    ^    ^   ^    ^    ^   ^

hours of relaxing I want to acquire

Trigger channels I use are:

Start the trigger: PFI 0

Trigger for Ref: PFI 1

With the sample VI 'start_and... '. ", I found that it acquires when the two begin and trigger reference comes and data collection was only after the release of a single reference.

I hope my explanation is understandable and I can have a solution soon.

Hi Tom,

This example configures a trigger starting and reference, but only for a single record. It is inside a loop, so it will continue to require a trigger start and each record. According to your description of the problem, you want to make an acquisition standard multi-record of 100 records, but you want to implement a trigger to start at the beginning of the acquisition. "' To do this, you can simply open the example of shipping"niScope EX Multi Record.vi"found in the example Finder LabVIEW or by browsing in your Start menu programs" National Instruments "NOR-SCOPE ' example. You need to add the property node to define your Trigger source begin to be PFI 0, but other than that, it should work fine. I have advanced and created a simplified with the trigger Start implemented, attached below. I hope this helps!

Tags: NI Products

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