USB 6211 Encoder

[sr123]

I know I can increase buffer size to resolve this issue, but for the accuracy of camera triggering I need to keep it buffer size 1, at 12000 Hz. 

[ChrisStrykesAgain]

I'm not sure I understand why you need a buffer size of 1. Could you explain that in a bit more detail?

[sr123]

Hello Christopher, 

Based on my understanding of buffer size - I assume that if my sapling rate is 1000, and buffer size is 1, then my DAQ would acquire 1000 samples in one second. and if I have buffer size 2 my DAQ would aquire only 500 samples per second (SoI am missing couple of values which are in between. And to increase accuracy I have buffer size of 1). As I said, my understanding on the buffer size could be wrong, but when I have higher buffer size, the values I display on front panel skip few values. 

[ChrisStrykesAgain]

I think you might misunderstand the principles behind buffer size. If your sampling rate is 1000 S/s, you're always going to get 1000 S/s (provided you don't overflow the buffer). The question then becomes how often do you want to transfer the data from the DAQ card to the PC. If you only want to pull data off once every second, and you are taking 1000 S/s, you will need a buffer size >=1000 samples.

I think the following link may explain it well: http://digital.ni.com/public.nsf/allkb/3E3D74E26B8A5B83862575CA0053E4B5