On Apr 12, 9:28 am, wrote:
Dear all,

I am new to DDS AD9854 and was wondering if you can help me with a
specific problem not
directly solvable.

My main aim is to generate a simple chirp signal which should be Phase-
Coherent. The standard output is Phase-Continuous. Does anyone have
any suggestions how to do it ?

Many Thanks.

I'm not sure I understand the difference. I'd think you'd want a
chirp to be phase-continuous, because that means that the waveform
doesn't experience any abrupt discontinuities as its frequency is
modified. What exactly does "phase coherence" refer to (if not the
ability to maintain a fixed phase relationship between two or more
different sources)?

-- john, KE5FX