how to do multitriggered acquisition using 5124 digitizer?

[ak ats]

hi

my application includes acquisition of an impulse wave.

how to do multi-triggered acquisition by pxi 5124, 12-bit digitizer?

[Evan R]

Hi,

I'm not sure what you mean by multi-triggered acquisition.

What are the specifications of the trigger you desire to use for acquisition?
- How often do you expect a trigger?
- Is the trigger a TTL pulse? if not, what are the electrical specifications of the trigger?
- Upon each receipt of the trigger, how many samples and at what rate do you need to acquire?

What is the application programming language you're using? (LabVIEW, CVI, Visual Basic, etc)?

There is a LabVIEW example which ships with the latest version of NI-SCOPE, entitled "NiScope Ex Multi Record.vi", which can be found using the example finder in LabVIEW (Help >> Find Examples >> Browse >> Hardware Input / Output >> Modular Instruments >> NI-Scope >> Features >> "NiScope Ex Multi Record.vi")

Best Regards,

Evan R
Applications Engineer
National Instruments
http://www.ni.com/support

[ak ats]

thanks evan,

these are the  specifications of the signal to be acquired,

a non cyclic, periodic impulse wave with a short rise time i'e 1micro sec. this wave has to be acquired can u help me in doing this using PXI 5124 digitizer.

[Evan R]

Hi Again,

Please refer to the example above, and the NI-High Speed Digitizers help, look for Triggers in the index. This will give you a detailed description of the methods available for triggering acquisitions with the 5124. The example should be close to what you're trying to do.

From your description, it sounds like there may not be 2 separate lines (one line for triggering, and one line for acquisition). If there is only 1 line, you may want to look into level triggering, hysteresis triggering, or other forms of analog triggering listed in the help file.

If you have any further questions, please feel free to respond!
Best Regards,

Evan