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AD9910 digital ramps with zero step interval?

Question asked by JHK on Feb 23, 2012
Latest reply on Feb 27, 2012 by JHK

Hi all,


I'm programming an AD9910 built into a third-party instrument, in particular I want to use the built-in digital ramp generator (DRG). The datasheet states that the step interval is set by a 16bit unsigned integer. I wonder what will happen if this is set to zero?


The background to this question is that I want to have frequency sweeps that start at the high limit and end at the low limit. However the AD9910 always seems to initialise the DRG at the LOWER frequency limit, so I'm looking for ways to get to the upper one as quickly as possible - ideally without any dwell time at the lower limit.


Any thoughts would be much appreciated!