Can you please explain the concept of Burst Mode a little please. When I try and sample a few channels at higher speeds the results often differ from what I expected. The sample intervals and number of samples don't always seem right.

Burst mode does require some knowledge of how the DT800 works.

There is a Technical Note that explains in detail how to set up a burst mode. It is on the upgrade CD that has been sent out to all DT800 users. http://datatakerforum.com/Documents/Notes/TN-0017-A0%20-%20DT800%20Burst%20Mode.pdf

Regards,
Roger