wait statement in data acquisition is not working, what might be the reasons ?

i am using NI DAQ USB 6255 for data acquisition , i need to acquire the voltages from 1024 pixels so i am using "for loop " to address the pixels and the problem is , its taking way much time( 36sec) .

using wait statement will stop matlab execution and jus acquire data and store in DAQ card but writing wait syntax for 2 seconds is not working , its taking around 19 second .

plz any one help to counter this problem

[Walter Roberson]

duplicate is http://www.mathworks.co.uk/matlabcentral/answers/53261-does-wait-statment-in-data-acquicition-help-to-speed-up-the-execution

This question has been merged into there.