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AD9910 EVM?

Question asked by qbmain on Feb 21, 2011
Latest reply on Feb 24, 2011 by qbmain

Hello,

 

 

I am using ad9910 evm to generate linear fmcw baseband signal e.g.0MHz TO 10MHz in DRG or RAM mode.

 

The setting is

                continuous re-circulate or continuous bi-directional ramp in RAM mode;

                ram data type: frequency;

                system clock:100MHz;

 

The problem is

                  I find that the phase of the filtered out DDS signal is shift when I observe the waveform using the RAMOVER signal as trigerr.

                  How can i generate the LFMCW signal with steady initial phase in each pulse?

                  Is the problem still exist if i generat the LFMCW signal in DRG mode?

 

thank you,

 

qbmain

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