What are the different between startforeground and startbackground (Session-Based Interface)?

Hi,

I'm trying to use DAQ NI USB 6008. In help session, I found that 64bit MATLAB can import/export the data by using creatSession of my DAQ, then addAnalogInputChannel .

I wonder what are the different between startforeground and startbackground ?

I already try 2 of them, i'm placing startforeground in while loop to make it run all the time but the data has some delay. Then i try to use startbackground and set IsContinuous = true

Then i'm adding addlistener('DataAvailable', @event) but i'm not sure how this event work in the loop.

*Can i call the variables in the event out to my main editor page ?

And how the function(i mean loop) of addlistener and IsContinuous = true work ?

And if i want to measure the time when the data transfer where do i place tic and toc in case of startbackground ?*

Thanks,

[Hsuan Tse Guo]

me 2 have some delay when I use startforeground.

It seem need more time than using start(AI). I would like to know is the problem of Matlab or something.