Synchronization between Analog Output and Input

[SATEESH KUMAR]

I am using NI 4551 (DSA card)and using NI-DAQ APIs for writing and reading throch Analog Channels. As I am writing and reading the data I am getting a delay of 18mSec at the input channel.How can I avoid this delay and synchronize Analog Output with Analog Input.

[bspears]

Hello,

It seems most likely that you are seeing the filter delay that is inherent in the device because it uses delta-sigma converters. To read more about this delay look at page 3-8 in the NI 4551/4552 User Manual linked below:

http://digital.ni.com/manuals.nsf/webAdvsearch/6A32358C53BB15F086256660007392DC?OpenDocument&vid=niw...

To synchronize analog input and output try this LabVIEW example:

http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3DDD556A4E034080020E74861&p_...

Hope this helps!

Brian Spears