FETCHING DATA AND PROCESSING REAL TIME

[JAMESAAG]

HI,

I AM USING NI-5105 PCI DIGITIZER.

i want to acuire data and perform some signal processing on it and display it on a GUI.

Can i perform real time signal processing using this card?

can i fetch data directly to my signal processing routine instead of saving it to a file on PC?

If i want to acquire 8 channels simultaneously with one analog trigger,where should i connect this analog trigger input?

and in code where i should specify this?

waiting for your support!

regards,

ayaan

[Anthony_F]

Hello ayaan,

The amount of processing you will be able to perfom will depend on your system configuration (CPU speed, RAM availabilty, etc), the amount of data you wish to process, and the type of processing you are doing.  Can you expand on what type of signal processing you will be doing?

You do not have to save the data to a file, in the NI Scope Fetch/Read functions you can use the waveform output terminal without saving.  Please take a look at the niScope Ex Getting Started.vi located in the Example Finder -> Modular Instruments -> NI scope -> Demos

The 5105 provice a programmable function input (PFI 1) on the front panel where you can trigger, or bring in an external clock.  The signal should be a digital TTL level signal however, what type of analog signal are you trying to trigger on?

You will specify the trigger in the NI Scope Configure Trigger function before initiating the task. Take a look at the niScope Ex Configured Acquisition.vi which is also in the Example Finder.  Inside the case structure there are several different trigger types.