How to make DDS AD9854 output Phase-Coherent ?

[GeekWizard]

Dear all,

I am new working with DDS AD9854 and was wondering if anyone 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.

 

[GeekWizard]

In a chrip signal, the output goes from F1 to F2 and then back to F1
at each I/O UD pulse. I want the phase to remain the same (or zero) at
every transition from F2 to F1. This is what I mean by phase-
coherent.


Many Thanks.

 

[mehdi_an]

Dear all,

I am new working with DDS AD9854 and was wondering if anyone 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.

you use from family dsp prossor texax
for exampl tms320c28f