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AD9144 DC output in FMCDAQ2

Question asked by savvysky on Nov 20, 2017
Latest reply on Dec 13, 2017 by savvysky

I am using FMCDAQ2 and try to sent some voltage to AD9144. First, I sent some data like ABAB... to AD9144, (A and B are two digital values), and I observed a normal periodical output on an oscilloscope, then I changed the data to AAAA... or BBBB..., the observed signal on oscilloscope is always 0. I should see some non-zero DC voltage output right? The oscilloscope is set as DC coupled, so is there any DC block in AD9144, or I need to change some register values to make it work on DC?