Hello;
You can do that, however, to change the group of analog input channels on the fly, you will need to stop and then restart the boad clock. That will cause you miss some data points.
In case you can't afford to loose data, you can set up an acquisition using all 16 channels, and then, only store the points from the channels of interest.
Hope this helps.
Filipe A.
Applications Engineer
National Instruments