How does data acquisition works?

[astroboy]

I need to know how the data acquisition works.
Does this method needs software trigger in order to start acquiring the data and stop it? Is it meant meant for the collection of the data? What is Pacer used for? How do I use the externhal or internal trigger? Any references for using it?

[Dennis_Knutson]

The first place to start is with the documentation on your pc. From the LabVIEW Help menu, select Search the labVIEW Bookshelf. When the Acrobat document opens, select the LabVIEW Measurements Manual. The shipping examples with LabVIEW contain numerous VIs for all types af DAQ. There is help for NI-DAQ and DAQmx available from MAX. You can go to the Measurement Hardware page of NI Developer Zone to get tutorials, app notes and example code.

[JuanCarlos]

Astroboy,

Data acquisition (DAQ) is a very wide term user for analog, digital and counter input/output. Here are some answers, however the field is so wide that some of the documents can help you get a better picture.

>Does this method needs software trigger in order to start acquiring the data and stop it?

You can start ans stop the acquisition by software or by hardware. It can be a digital pulse or an analog level.

>Is it meant meant for the collection of the data?

For the collection of data and much more: process control, data logging, digital IO, signal generation, etc...

>How do I use the externhal or internal trigger?

By default the acquisition will be triggered by software, however it's just matter of configuring the type of tr
iger when creating the task.

>Any references for using it?

There is a really big number of documents an examples on the web, Dennis sugestions are the best to get started.

I hope this helps.

Regards,

Juan Carlos
N.I.

[astroboy]

Hi Thanks a alot.
You are a great help to me.

regards,
Clement Yap

[JuanCarlos]

Any time!

Good luck with your project.

Juan Carlos